brl/mutter
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
c0d5af5de5
mutter/clutter/clutter-actor.c
Robert Bragg c0d5af5de5 Adds initial clipped redraw support to Clutter 
A new (internal only currently) API, _clutter_actor_queue_clipped_redraw
can be used to queue a redraw along with a clip rectangle in actor
coordinates. This clip rectangle propagates up to the stage and clutter
backend which may optionally use the information to optimize stage
redraws. The GLX backend in particular may scissor the next redraw to
the clip rectangle and use GLX_MESA_copy_sub_buffer to present the stage
subregion.

The intention is that any actors that can naturally determine the bounds
of updates should queue clipped redraws to reduce the cost of updating
small regions of the screen.

Notes:
» If GLX_MESA_copy_sub_buffer isn't available then the GLX backend
  ignores any clip rectangles.

» queuing multiple clipped redraws will result in the bounding box of
  each clip rectangle being used.

» If a clipped redraw has a height > 300 pixels then it's promoted into
  a full stage redraw, so that the GPU doesn't end up blocking too long
  waiting for the vsync to reach the optimal position to avoid tearing.

  » Note: no empirical data was used to come up with this threshold so
    we may need to tune this.

» Currently only ClutterX11TexturePixmap makes use of this new API. This
  is done via a new "queue-damage-redraw" signal that is emitted when
  the pixmap is updated. The default handler queues a clipped redraw
  with the assumption that the pixmap is being painted as a rectangle
  covering the actors transformed allocation. If you subclass
  ClutterX11TexturePixmap and change how it's painted you now also
  need to override the signal handler and queue your own redraw.

  Technically this is a semantic break, but it's assumed that no one
  is currently doing this.

This still leaves a few unsolved issues with regards to optimizing sub
stage redraws that need to be addressed in further work so this can only
be considered a stepping stone a this point:

» Because we have no reliable way to determine if the painting of any
  given actor is being modified any optimizations implemented using
  _clutter_actor_queue_redraw_with_clip must be overridable by a
  subclass, and technically must be opt-in for existing classes to avoid
  a change in semantics. E.g. consider that a user connects to the paint
  signal for ClutterTexture and paints a circle instead of a rectangle.
  In this case any original logic to queue clipped redraws would be
  incorrect.

» Currently only the implementation of an actor has enough information
  with which to queue clipped redraws. E.g. It is not possible for
  generic code in clutter-actor.c to queue a clipped redraw when hiding
  an actor because actors have no way to report a "paint box". (remember
  actors can draw outside their allocation and actors with depth may
  also be projected outside of their allocation)

  » The current plan is to add a actor_class->get_paint_cuboid()
    virtual so actors can report a bounding cube for everything they
    would draw in their current state and use that to queue clipped
    redraws against the stage by projecting the paint cube into stage
    coordinates.

» Our heuristics for promoting clipped redraws into full redraws to
  avoid blocking the GPU while we wait for the vsync need improving:

  » vsync issues aren't relevant for redirected/composited applications
    so they should use different heuristics. In this case we instead
    need to trade off the cost of blitting when using glXCopySubBuffer
    vs promoting to a full redraw and flipping instead.
2010-03-02 17:19:11 +00:00

10071 lines
289 KiB
C
Raw Blame History

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006, 2007, 2008 OpenedHand Ltd
* Copyright (C) 2009, 2010 Intel Corp
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:clutter-actor
* @short_description: Base abstract class for all visual stage actors.
*
* #ClutterActor is a base abstract class for all visual elements on the
* stage. Every object that must appear on the main #ClutterStage must also
* be a #ClutterActor, either by using one of the classes provided by
* Clutter, or by implementing a new #ClutterActor subclass.
*
* Every actor is a 2D surface positioned and optionally transformed
* in 3D space. The actor is positioned relative to top left corner of
* it parent with the childs origin being its anchor point (also top
* left by default).
*
* The actors 2D surface is contained inside its bounding box,
* described by the #ClutterActorBox structure:
*
* <figure id="actor-box">
* <title>Bounding box of an Actor</title>
* <graphic fileref="actor-box.png" format="PNG"/>
* </figure>
*
* The actor box represents the untransformed area occupied by an
* actor. Each visible actor that has been put on a #ClutterStage also
* has a transformed area, depending on the actual transformations
* applied to it by the developer (scale, rotation). Tranforms will
* also be applied to any child actors. Also applied to all actors by
* the #ClutterStage is a perspective transformation. API is provided
* for both tranformed and untransformed actor geometry information.
*
* The 'modelview' transform matrix for the actor is constructed from
* the actor settings by the following order of operations:
* <orderedlist>
* <listitem><para>Translation by actor x, y coords,</para></listitem>
* <listitem><para>Translation by actor depth (z),</para></listitem>
* <listitem><para>Scaling by scale_x, scale_y,</para></listitem>
* <listitem><para>Rotation around z axis,</para></listitem>
* <listitem><para>Rotation around y axis,</para></listitem>
* <listitem><para>Rotation around x axis,</para></listitem>
* <listitem><para>Negative translation by anchor point x,
* y,</para></listitem>
* <listitem><para>Rectangular Clip is applied (this is not an operation on
* the matrix as such, but it is done as part of the transform set
* up).</para></listitem>
* </orderedlist>
*
* An actor can either be explicitly sized and positioned, using the
* various size and position accessors, like clutter_actor_set_x() or
* clutter_actor_set_width(); or it can have a preferred width and
* height, which then allows a layout manager to implicitly size and
* position it by "allocating" an area for an actor. This allows for
* actors to be manipulated in both a fixed (or static) parent container
* (i.e. children of #ClutterGroup) and a more automatic (or dynamic)
* layout based parent container.
*
* When accessing the position and size of an actor, the simple accessors
* like clutter_actor_get_width() and clutter_actor_get_x() will return
* a value depending on whether the actor has been explicitly sized and
* positioned by the developer or implicitly by the layout manager.
*
* Depending on whether you are querying an actor or implementing a
* layout manager, you should either use the simple accessors or use the
* size negotiation API.
*
* Clutter actors are also able to receive input events and react to
* them. Events are handled in the following ways:
*
* <orderedlist>
* <listitem><para>Actors emit pointer events if set reactive, see
* clutter_actor_set_reactive()</para></listitem>
* <listitem><para>The stage is always reactive</para></listitem>
* <listitem><para>Events are handled by connecting signal handlers to
* the numerous event signal types.</para></listitem>
* <listitem><para>Event handlers must return %TRUE if they handled
* the event and wish to block the event emission chain, or %FALSE
* if the emission chain must continue</para></listitem>
* <listitem><para>Keyboard events are emitted if actor has focus, see
* clutter_stage_set_key_focus()</para></listitem>
* <listitem><para>Motion events (motion, enter, leave) are not emitted
* if clutter_set_motion_events_enabled() is called with %FALSE.
* See clutter_set_motion_events_enabled() documentation for more
* information.</para></listitem>
* <listitem><para>Once emitted, an event emission chain has two
* phases: capture and bubble. An emitted event starts in the capture
* phase (see ClutterActor::captured-event) beginning at the stage and
* traversing every child actor until the event source actor is reached.
* The emission then enters the bubble phase, traversing back up the
* chain via parents until it reaches the stage. Any event handler can
* abort this chain by returning %TRUE (meaning "event handled").
* </para></listitem>
* <listitem><para>Pointer events will 'pass through' non reactive
* overlapping actors.</para></listitem>
* </orderedlist>
*
* <figure id="event-flow">
* <title>Event flow in Clutter</title>
* <graphic fileref="event-flow.png" format="PNG"/>
* </figure>
*
* Every '?' box in the diagram above is an entry point for application
* code.
*
* For implementing a new custom actor class, please read <link
* linkend="clutter-subclassing-ClutterActor">the corresponding section</link>
* of the API reference.
*/
/**
* CLUTTER_ACTOR_IS_MAPPED:
* @a: a #ClutterActor
*
* Evaluates to %TRUE if the %CLUTTER_ACTOR_MAPPED flag is set.
*
* Means "the actor will be painted if the stage is mapped."
*
* %TRUE if the actor is visible; and all parents with possible exception
* of the stage are visible; and an ancestor of the actor is a toplevel.
*
* Clutter auto-maintains the mapped flag whenever actors are
* reparented or shown/hidden.
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_IS_REALIZED:
* @a: a #ClutterActor
*
* Evaluates to %TRUE if the %CLUTTER_ACTOR_REALIZED flag is set.
*
* Whether GL resources such as textures are allocated;
* if an actor is mapped it must also be realized, but an actor
* can be realized and unmapped (this is so hiding an actor temporarily
* doesn't do an expensive unrealize/realize).
*
* To be realized an actor must be inside a stage, and all its parents
* must be realized. The stage is required so the actor knows the
* correct GL context and window system resources to use.
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_IS_VISIBLE:
* @a: a #ClutterActor
*
* Evaluates to %TRUE if the actor has been shown, %FALSE if it's hidden.
* Equivalent to the ClutterActor::visible object property.
*
* Note that an actor is only painted onscreen if it's mapped, which
* means it's visible, and all its parents are visible, and one of the
* parents is a toplevel stage.
*
* Since: 0.2
*/
/**
* CLUTTER_ACTOR_IS_REACTIVE:
* @a: a #ClutterActor
*
* Evaluates to %TRUE if the %CLUTTER_ACTOR_REACTIVE flag is set.
*
* Only reactive actors will receive event-related signals.
*
* Since: 0.6
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-actor.h"
#include "clutter-container.h"
#include "clutter-main.h"
#include "clutter-enum-types.h"
#include "clutter-scriptable.h"
#include "clutter-script.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include "clutter-units.h"
#include "clutter-profile.h"
#include "clutter-stage.h"
#include "cogl/cogl.h"
typedef struct _ShaderData ShaderData;
typedef struct _AnchorCoord AnchorCoord;
#define CLUTTER_ACTOR_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_ACTOR, ClutterActorPrivate))
/* Internal helper struct to represent a point that can be stored in
either direct pixel coordinates or as a fraction of the actor's
size. It is used for the anchor point, scale center and rotation
centers. */
struct _AnchorCoord
{
gboolean is_fractional;
union
{
/* Used when is_fractional == TRUE */
struct
{
gdouble x;
gdouble y;
} fraction;
/* Use when is_fractional == FALSE */
ClutterVertex units;
} v;
};
/* 3 entries should be a good compromise, few layout managers
* will ask for 3 different preferred size in each allocation cycle */
#define N_CACHED_SIZE_REQUESTS 3
typedef struct _SizeRequest SizeRequest;
struct _SizeRequest
{
guint age;
gfloat for_size;
gfloat min_size;
gfloat natural_size;
};
/* Internal enum used to control mapped state update. This is a hint
* which indicates when to do something other than just enforce
* invariants.
*/
typedef enum {
MAP_STATE_CHECK, /* just enforce invariants. */
MAP_STATE_MAKE_UNREALIZED, /* force unrealize, ignoring invariants,
* used when about to unparent.
*/
MAP_STATE_MAKE_MAPPED, /* set mapped, error if invariants not met;
* used to set mapped on toplevels.
*/
MAP_STATE_MAKE_UNMAPPED /* set unmapped, even if parent is mapped,
* used just before unmapping parent.
*/
} MapStateChange;
struct _ClutterActorPrivate
{
/* fixed_x, fixed_y, and the allocation box are all in parent
* coordinates.
*/
gfloat fixed_x;
gfloat fixed_y;
/* request mode */
ClutterRequestMode request_mode;
/* our cached size requests for different width / height */
SizeRequest width_requests[N_CACHED_SIZE_REQUESTS];
SizeRequest height_requests[N_CACHED_SIZE_REQUESTS];
/* An age of 0 means the entry is not set */
guint cached_height_age;
guint cached_width_age;
gfloat request_min_width;
gfloat request_min_height;
gfloat request_natural_width;
gfloat request_natural_height;
ClutterActorBox allocation;
ClutterAllocationFlags allocation_flags;
guint position_set : 1;
guint min_width_set : 1;
guint min_height_set : 1;
guint natural_width_set : 1;
guint natural_height_set : 1;
/* cached request is invalid (implies allocation is too) */
guint needs_width_request : 1;
/* cached request is invalid (implies allocation is too) */
guint needs_height_request : 1;
/* cached allocation is invalid (request has changed, probably) */
guint needs_allocation : 1;
guint show_on_set_parent : 1;
guint has_clip : 1;
guint clip_to_allocation : 1;
guint enable_model_view_transform : 1;
guint enable_paint_unmapped : 1;
guint has_pointer : 1;
guint propagated_one_redraw : 1;
gfloat clip[4];
/* Rotation angles */
gdouble rxang;
gdouble ryang;
gdouble rzang;
/* Rotation center: X axis */
AnchorCoord rx_center;
/* Rotation center: Y axis */
AnchorCoord ry_center;
/* Rotation center: Z axis */
AnchorCoord rz_center;
/* Anchor point coordinates */
AnchorCoord anchor;
/* depth */
gfloat z;
guint8 opacity;
ClutterActor *parent_actor;
gchar *name;
guint32 id; /* Unique ID */
gdouble scale_x;
gdouble scale_y;
AnchorCoord scale_center;
ShaderData *shader_data;
PangoContext *pango_context;
ClutterActor *opacity_parent;
ClutterTextDirection text_direction;
gint internal_child;
/* XXX: This is a workaround for not being able to break the ABI
* of the QUEUE_REDRAW signal. It's an out-of-band argument.
* See clutter_actor_queue_clipped_redraw() for details.
*/
const ClutterActorBox *oob_queue_redraw_clip;
};
enum
{
PROP_0,
PROP_NAME,
/* X, Y, WIDTH, HEIGHT are "do what I mean" properties;
* when set they force a size request, when gotten they
* get the allocation if the allocation is valid, and the
* request otherwise
*/
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT,
/* Then the rest of these size-related properties are the "actual"
* underlying properties set or gotten by X, Y, WIDTH, HEIGHT
*/
PROP_FIXED_X,
PROP_FIXED_Y,
PROP_FIXED_POSITION_SET,
PROP_MIN_WIDTH,
PROP_MIN_WIDTH_SET,
PROP_MIN_HEIGHT,
PROP_MIN_HEIGHT_SET,
PROP_NATURAL_WIDTH,
PROP_NATURAL_WIDTH_SET,
PROP_NATURAL_HEIGHT,
PROP_NATURAL_HEIGHT_SET,
PROP_REQUEST_MODE,
/* Allocation properties are read-only */
PROP_ALLOCATION,
PROP_DEPTH,
PROP_CLIP,
PROP_HAS_CLIP,
PROP_CLIP_TO_ALLOCATION,
PROP_OPACITY,
PROP_VISIBLE,
PROP_MAPPED,
PROP_REALIZED,
PROP_REACTIVE,
PROP_SCALE_X,
PROP_SCALE_Y,
PROP_SCALE_CENTER_X,
PROP_SCALE_CENTER_Y,
PROP_SCALE_GRAVITY,
PROP_ROTATION_ANGLE_X,
PROP_ROTATION_ANGLE_Y,
PROP_ROTATION_ANGLE_Z,
PROP_ROTATION_CENTER_X,
PROP_ROTATION_CENTER_Y,
PROP_ROTATION_CENTER_Z,
/* This property only makes sense for the z rotation because the
others would depend on the actor having a size along the
z-axis */
PROP_ROTATION_CENTER_Z_GRAVITY,
PROP_ANCHOR_X,
PROP_ANCHOR_Y,
PROP_ANCHOR_GRAVITY,
PROP_SHOW_ON_SET_PARENT,
PROP_TEXT_DIRECTION,
PROP_HAS_POINTER
};
enum
{
SHOW,
HIDE,
DESTROY,
PARENT_SET,
KEY_FOCUS_IN,
KEY_FOCUS_OUT,
PAINT,
PICK,
REALIZE,
UNREALIZE,
QUEUE_REDRAW,
QUEUE_RELAYOUT,
EVENT,
CAPTURED_EVENT,
BUTTON_PRESS_EVENT,
BUTTON_RELEASE_EVENT,
SCROLL_EVENT,
KEY_PRESS_EVENT,
KEY_RELEASE_EVENT,
MOTION_EVENT,
ENTER_EVENT,
LEAVE_EVENT,
ALLOCATION_CHANGED,
LAST_SIGNAL
};
static guint actor_signals[LAST_SIGNAL] = { 0, };
static void clutter_scriptable_iface_init (ClutterScriptableIface *iface);
static void _clutter_actor_apply_modelview_transform (ClutterActor *self);
static void clutter_actor_shader_pre_paint (ClutterActor *actor,
gboolean repeat);
static void clutter_actor_shader_post_paint (ClutterActor *actor);
static void destroy_shader_data (ClutterActor *self);
/* These setters are all static for now, maybe they should be in the
* public API, but they are perhaps obscure enough to leave only as
* properties
*/
static void clutter_actor_set_min_width (ClutterActor *self,
gfloat min_width);
static void clutter_actor_set_min_height (ClutterActor *self,
gfloat min_height);
static void clutter_actor_set_natural_width (ClutterActor *self,
gfloat natural_width);
static void clutter_actor_set_natural_height (ClutterActor *self,
gfloat natural_height);
static void clutter_actor_set_min_width_set (ClutterActor *self,
gboolean use_min_width);
static void clutter_actor_set_min_height_set (ClutterActor *self,
gboolean use_min_height);
static void clutter_actor_set_natural_width_set (ClutterActor *self,
gboolean use_natural_width);
static void clutter_actor_set_natural_height_set (ClutterActor *self,
gboolean use_natural_height);
static void clutter_actor_update_map_state (ClutterActor *self,
MapStateChange change);
static void clutter_actor_unrealize_not_hiding (ClutterActor *self);
/* Helper routines for managing anchor coords */
static void clutter_anchor_coord_get_units (ClutterActor *self,
const AnchorCoord *coord,
gfloat *x,
gfloat *y,
gfloat *z);
static void clutter_anchor_coord_set_units (AnchorCoord *coord,
gfloat x,
gfloat y,
gfloat z);
static ClutterGravity clutter_anchor_coord_get_gravity (AnchorCoord *coord);
static void clutter_anchor_coord_set_gravity (AnchorCoord *coord,
ClutterGravity gravity);
static gboolean clutter_anchor_coord_is_zero (const AnchorCoord *coord);
/* Helper macro which translates by the anchor coord, applies the
given transformation and then translates back */
#define TRANSFORM_ABOUT_ANCHOR_COORD(a,m,c,_transform) G_STMT_START { \
gfloat _tx, _ty, _tz; \
clutter_anchor_coord_get_units ((a), (c), &_tx, &_ty, &_tz); \
cogl_matrix_translate ((m), _tx, _ty, _tz); \
{ _transform; } \
cogl_matrix_translate ((m), -_tx, -_ty, -_tz); } G_STMT_END
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (ClutterActor,
clutter_actor,
G_TYPE_INITIALLY_UNOWNED,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_SCRIPTABLE,
clutter_scriptable_iface_init));
#ifdef CLUTTER_ENABLE_DEBUG
/* XXX - this is for debugging only, remove once working (or leave
* in only in some debug mode). Should leave it for a little while
* until we're confident in the new map/realize/visible handling.
*/
static inline void
clutter_actor_verify_map_state (ClutterActor *self)
{
ClutterActorPrivate *priv = self->priv;
if (CLUTTER_ACTOR_IS_REALIZED (self))
{
/* all bets are off during reparent when we're potentially realized,
* but should not be according to invariants
*/
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT))
{
if (priv->parent_actor == NULL)
{
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
}
else
g_warning ("Realized non-toplevel actor '%s' should "
"have a parent",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
else if (!CLUTTER_ACTOR_IS_REALIZED (priv->parent_actor))
{
g_warning ("Realized actor %s has an unrealized parent %s",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self),
clutter_actor_get_name (priv->parent_actor)
? clutter_actor_get_name (priv->parent_actor)
: G_OBJECT_TYPE_NAME (priv->parent_actor));
}
}
}
if (CLUTTER_ACTOR_IS_MAPPED (self))
{
if (!CLUTTER_ACTOR_IS_REALIZED (self))
g_warning ("Actor '%s' is mapped but not realized",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
/* remaining bets are off during reparent when we're potentially
* mapped, but should not be according to invariants
*/
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT))
{
if (priv->parent_actor == NULL)
{
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
if (!CLUTTER_ACTOR_IS_VISIBLE (self) &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION))
{
g_warning ("Toplevel actor '%s' is mapped "
"but not visible",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
}
else
{
g_warning ("Mapped actor '%s' should have a parent",
priv->name ? priv->name
:G_OBJECT_TYPE_NAME (self));
}
}
else
{
ClutterActor *iter = self;
/* check for the enable_paint_unmapped flag on the actor
* and parents; if the flag is enabled at any point of this
* branch of the scene graph then all the later checks
* become pointless
*/
while (iter != NULL)
{
if (iter->priv->enable_paint_unmapped)
return;
iter = iter->priv->parent_actor;
}
if (!CLUTTER_ACTOR_IS_VISIBLE (priv->parent_actor))
{
g_warning ("Actor '%s' should not be mapped if parent "
"is not visible",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
if (!CLUTTER_ACTOR_IS_REALIZED (priv->parent_actor))
{
g_warning ("Actor '%s' should not be mapped if parent "
"is not realized",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
if (!(CLUTTER_PRIVATE_FLAGS (priv->parent_actor) &
CLUTTER_ACTOR_IS_TOPLEVEL))
{
if (!CLUTTER_ACTOR_IS_MAPPED (priv->parent_actor))
g_warning ("Actor '%s' is mapped but its non-toplevel "
"parent is not mapped",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
}
}
}
}
#endif /* CLUTTER_ENABLE_DEBUG */
static void
clutter_actor_set_mapped (ClutterActor *self,
gboolean mapped)
{
if (CLUTTER_ACTOR_IS_MAPPED (self) == mapped)
return;
if (mapped)
{
CLUTTER_ACTOR_GET_CLASS (self)->map (self);
g_assert (CLUTTER_ACTOR_IS_MAPPED (self));
}
else
{
CLUTTER_ACTOR_GET_CLASS (self)->unmap (self);
g_assert (!CLUTTER_ACTOR_IS_MAPPED (self));
}
}
/* this function updates the mapped and realized states according to
* invariants, in the appropriate order.
*/
static void
clutter_actor_update_map_state (ClutterActor *self,
MapStateChange change)
{
gboolean was_mapped;
was_mapped = CLUTTER_ACTOR_IS_MAPPED (self);
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
/* the mapped flag on top-level actors must be set by the
* per-backend implementation because it might be asynchronous.
*
* That is, the MAPPED flag on toplevels currently tracks the X
* server mapped-ness of the window, while the expected behavior
* (if used to GTK) may be to track WM_STATE!=WithdrawnState.
* This creates some weird complexity by breaking the invariant
* that if we're visible and all ancestors shown then we are
* also mapped - instead, we are mapped if all ancestors
* _possibly excepting_ the stage are mapped. The stage
* will map/unmap for example when it is minimized or
* moved to another workspace.
*
* So, the only invariant on the stage is that if visible it
* should be realized, and that it has to be visible to be
* mapped.
*/
if (CLUTTER_ACTOR_IS_VISIBLE (self))
clutter_actor_realize (self);
switch (change)
{
case MAP_STATE_CHECK:
break;
case MAP_STATE_MAKE_MAPPED:
g_assert (!was_mapped);
clutter_actor_set_mapped (self, TRUE);
break;
case MAP_STATE_MAKE_UNMAPPED:
g_assert (was_mapped);
clutter_actor_set_mapped (self, FALSE);
break;
case MAP_STATE_MAKE_UNREALIZED:
/* we only use MAKE_UNREALIZED in unparent,
* and unparenting a stage isn't possible.
* If someone wants to just unrealize a stage
* then clutter_actor_unrealize() doesn't
* go through this codepath.
*/
g_warning ("Trying to force unrealize stage is not allowed");
break;
}
if (CLUTTER_ACTOR_IS_MAPPED (self) &&
!CLUTTER_ACTOR_IS_VISIBLE (self) &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION))
{
g_warning ("Clutter toplevel of type '%s' is not visible, but "
"it is somehow still mapped",
G_OBJECT_TYPE_NAME (self));
}
}
else
{
ClutterActorPrivate *priv = self->priv;
ClutterActor *parent = priv->parent_actor;
gboolean should_be_mapped;
gboolean may_be_realized;
gboolean must_be_realized;
should_be_mapped = FALSE;
may_be_realized = TRUE;
must_be_realized = FALSE;
if (parent == NULL || change == MAP_STATE_MAKE_UNREALIZED)
{
may_be_realized = FALSE;
}
else
{
/* Maintain invariant that if parent is mapped, and we are
* visible, then we are mapped ... unless parent is a
* stage, in which case we map regardless of parent's map
* state but do require stage to be visible and realized.
*
* If parent is realized, that does not force us to be
* realized; but if parent is unrealized, that does force
* us to be unrealized.
*
* The reason we don't force children to realize with
* parents is _clutter_actor_rerealize(); if we require that
* a realized parent means children are realized, then to
* unrealize an actor we would have to unrealize its
* parents, which would end up meaning unrealizing and
* hiding the entire stage. So we allow unrealizing a
* child (as long as that child is not mapped) while that
* child still has a realized parent.
*
* Also, if we unrealize from leaf nodes to root, and
* realize from root to leaf, the invariants are never
* violated if we allow children to be unrealized
* while parents are realized.
*
* When unmapping, MAP_STATE_MAKE_UNMAPPED is specified
* to force us to unmap, even though parent is still
* mapped. This is because we're unmapping from leaf nodes
* up to root nodes.
*/
if (CLUTTER_ACTOR_IS_VISIBLE (self) &&
change != MAP_STATE_MAKE_UNMAPPED)
{
gboolean parent_is_visible_realized_toplevel;
parent_is_visible_realized_toplevel =
(((CLUTTER_PRIVATE_FLAGS (parent) &
CLUTTER_ACTOR_IS_TOPLEVEL) != 0) &&
CLUTTER_ACTOR_IS_VISIBLE (parent) &&
CLUTTER_ACTOR_IS_REALIZED (parent));
if (CLUTTER_ACTOR_IS_MAPPED (parent) ||
parent_is_visible_realized_toplevel)
{
must_be_realized = TRUE;
should_be_mapped = TRUE;
}
}
/* if the actor has been set to be painted even if unmapped
* then we should map it and check for realization as well;
* this is an override for the branch of the scene graph
* which begins with this node
*/
if (priv->enable_paint_unmapped)
{
if (priv->parent_actor == NULL)
g_warning ("Attempting to map an unparented actor '%s'",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
should_be_mapped = TRUE;
must_be_realized = TRUE;
}
if (!CLUTTER_ACTOR_IS_REALIZED (parent))
may_be_realized = FALSE;
}
if (change == MAP_STATE_MAKE_MAPPED && !should_be_mapped)
{
if (parent == NULL)
g_warning ("Attempting to map a child that does not "
"meet the necessary invariants: the actor '%s' "
"has no parent",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
else
g_warning ("Attempting to map a child that does not "
"meet the necessary invariants: the actor '%s' "
"is parented to an unmapped actor",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
/* If in reparent, we temporarily suspend unmap and unrealize.
*
* We want to go in the order "realize, map" and "unmap, unrealize"
*/
/* Unmap */
if (!should_be_mapped &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT))
{
clutter_actor_set_mapped (self, FALSE);
}
/* Realize */
if (must_be_realized)
clutter_actor_realize (self);
/* if we must be realized then we may be, presumably */
g_assert (!(must_be_realized && !may_be_realized));
/* Unrealize */
if (!may_be_realized &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT))
clutter_actor_unrealize_not_hiding (self);
/* Map */
if (should_be_mapped)
{
if (!must_be_realized)
g_warning ("Somehow we think actor '%s' should be mapped but "
"not realized, which isn't allowed",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
/* realization is allowed to fail (though I don't know what
* an app is supposed to do about that - shouldn't it just
* be a g_error? anyway, we have to avoid mapping if this
* happens)
*/
if (CLUTTER_ACTOR_IS_REALIZED (self))
clutter_actor_set_mapped (self, TRUE);
}
}
#ifdef CLUTTER_ENABLE_DEBUG
/* check all invariants were kept */
clutter_actor_verify_map_state (self);
#endif
}
static void
clutter_actor_real_map (ClutterActor *self)
{
g_assert (!CLUTTER_ACTOR_IS_MAPPED (self));
CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_MAPPED);
/* notify on parent mapped before potentially mapping
* children, so apps see a top-down notification.
*/
g_object_notify (G_OBJECT (self), "mapped");
if (CLUTTER_IS_CONTAINER (self))
clutter_container_foreach_with_internals (CLUTTER_CONTAINER (self),
CLUTTER_CALLBACK (clutter_actor_map),
NULL);
}
/**
* clutter_actor_map:
* @self: A #ClutterActor
*
* Sets the %CLUTTER_ACTOR_MAPPED flag on the actor and possibly maps
* and realizes its children if they are visible. Does nothing if the
* actor is not visible.
*
* Calling this is allowed in only one case: you are implementing the
* #ClutterActor::map virtual function in an actor and you need to map
* the children of that actor. It is not necessary to call this
* if you implement #ClutterContainer because the default implementation
* will automatically map children of containers.
*
* When overriding map, it is mandatory to chain up to the parent
* implementation.
*
* Since: 1.0
*/
void
clutter_actor_map (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (CLUTTER_ACTOR_IS_MAPPED (self))
return;
if (!CLUTTER_ACTOR_IS_VISIBLE (self))
return;
clutter_actor_update_map_state (self, MAP_STATE_MAKE_MAPPED);
}
static void
clutter_actor_real_unmap (ClutterActor *self)
{
g_assert (CLUTTER_ACTOR_IS_MAPPED (self));
if (CLUTTER_IS_CONTAINER (self))
clutter_container_foreach_with_internals (CLUTTER_CONTAINER (self),
CLUTTER_CALLBACK (clutter_actor_unmap),
NULL);
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_MAPPED);
/* notify on parent mapped after potentially unmapping
* children, so apps see a bottom-up notification.
*/
g_object_notify (G_OBJECT (self), "mapped");
/* relinquish keyboard focus if we were unmapped while owning it */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
{
ClutterActor *stage;
stage = clutter_actor_get_stage (self);
if (stage &&
clutter_stage_get_key_focus (CLUTTER_STAGE (stage)) == self)
{
clutter_stage_set_key_focus (CLUTTER_STAGE (stage), NULL);
}
}
}
/**
* clutter_actor_unmap:
* @self: A #ClutterActor
*
* Unsets the %CLUTTER_ACTOR_MAPPED flag on the actor and possibly
* unmaps its children if they were mapped.
*
* Calling this is allowed in only one case: you are implementing the
* #ClutterActor::unmap virtual function in an actor and you need to
* unmap the children of that actor. It is not necessary to call this
* if you implement #ClutterContainer because the default implementation
* will automatically unmap children of containers.
*
* When overriding unmap, it is mandatory to chain up to the parent
* implementation.
*
* Since: 1.0
*/
void
clutter_actor_unmap (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (!CLUTTER_ACTOR_IS_MAPPED (self))
return;
clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNMAPPED);
}
static void
clutter_actor_real_show (ClutterActor *self)
{
if (!CLUTTER_ACTOR_IS_VISIBLE (self))
{
ClutterActorPrivate *priv = self->priv;
CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_VISIBLE);
/* we notify on the "visible" flag in the clutter_actor_show()
* wrapper so the entire show signal emission completes first
* (?)
*/
clutter_actor_update_map_state (self, MAP_STATE_CHECK);
/* we queue a relayout unless the actor is inside a
* container that explicitly told us not to
*/
if (priv->parent_actor &&
(!(priv->parent_actor->flags & CLUTTER_ACTOR_NO_LAYOUT)))
{
/* While an actor is hidden the parent may not have
* allocated/requested so we need to start from scratch
* and avoid the short-circuiting in
* clutter_actor_queue_relayout().
*/
priv->needs_width_request = FALSE;
priv->needs_height_request = FALSE;
priv->needs_allocation = FALSE;
clutter_actor_queue_relayout (self);
}
}
}
/**
* clutter_actor_show:
* @self: A #ClutterActor
*
* Flags an actor to be displayed. An actor that isn't shown will not
* be rendered on the stage.
*
* Actors are visible by default.
*
* If this function is called on an actor without a parent, the
* #ClutterActor:show-on-set-parent will be set to %TRUE as a side
* effect.
*/
void
clutter_actor_show (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
#ifdef CLUTTER_ENABLE_DEBUG
clutter_actor_verify_map_state (self);
#endif
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
if (!priv->show_on_set_parent && !priv->parent_actor)
{
priv->show_on_set_parent = TRUE;
g_object_notify (G_OBJECT (self), "show-on-set-parent");
}
if (!CLUTTER_ACTOR_IS_VISIBLE (self))
{
g_signal_emit (self, actor_signals[SHOW], 0);
g_object_notify (G_OBJECT (self), "visible");
}
if (priv->parent_actor)
clutter_actor_queue_redraw (priv->parent_actor);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_show_all:
* @self: a #ClutterActor
*
* Calls clutter_actor_show() on all children of an actor (if any).
*
* Since: 0.2
*/
void
clutter_actor_show_all (ClutterActor *self)
{
ClutterActorClass *klass;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
klass = CLUTTER_ACTOR_GET_CLASS (self);
if (klass->show_all)
klass->show_all (self);
}
void
clutter_actor_real_hide (ClutterActor *self)
{
if (CLUTTER_ACTOR_IS_VISIBLE (self))
{
ClutterActorPrivate *priv = self->priv;
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_VISIBLE);
/* we notify on the "visible" flag in the clutter_actor_hide()
* wrapper so the entire hide signal emission completes first
* (?)
*/
clutter_actor_update_map_state (self, MAP_STATE_CHECK);
/* we queue a relayout unless the actor is inside a
* container that explicitly told us not to
*/
if (priv->parent_actor &&
(!(priv->parent_actor->flags & CLUTTER_ACTOR_NO_LAYOUT)))
clutter_actor_queue_relayout (priv->parent_actor);
}
}
/**
* clutter_actor_hide:
* @self: A #ClutterActor
*
* Flags an actor to be hidden. A hidden actor will not be
* rendered on the stage.
*
* Actors are visible by default.
*
* If this function is called on an actor without a parent, the
* #ClutterActor:show-on-set-parent property will be set to %FALSE
* as a side-effect.
*/
void
clutter_actor_hide (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
#ifdef CLUTTER_ENABLE_DEBUG
clutter_actor_verify_map_state (self);
#endif
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
if (priv->show_on_set_parent && !priv->parent_actor)
{
priv->show_on_set_parent = FALSE;
g_object_notify (G_OBJECT (self), "show-on-set-parent");
}
if (CLUTTER_ACTOR_IS_VISIBLE (self))
{
g_signal_emit (self, actor_signals[HIDE], 0);
g_object_notify (G_OBJECT (self), "visible");
}
if (priv->parent_actor)
clutter_actor_queue_redraw (priv->parent_actor);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_hide_all:
* @self: a #ClutterActor
*
* Calls clutter_actor_hide() on all child actors (if any).
*
* Since: 0.2
*/
void
clutter_actor_hide_all (ClutterActor *self)
{
ClutterActorClass *klass;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
klass = CLUTTER_ACTOR_GET_CLASS (self);
if (klass->hide_all)
klass->hide_all (self);
}
/**
* clutter_actor_realize:
* @self: A #ClutterActor
*
* Creates any underlying graphics resources needed by the actor to be
* displayed.
*
* Realization means the actor is now tied to a specific rendering context
* (that is, a specific toplevel stage).
*
* This function does nothing if the actor is already realized.
*
* Because a realized actor must have realized parent actors, calling
* clutter_actor_realize() will also realize all parents of the actor.
*
* This function does not realize child actors, except in the special
* case that realizing the stage, when the stage is visible, will
* suddenly map (and thus realize) the children of the stage.
**/
void
clutter_actor_realize (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
#ifdef CLUTTER_ENABLE_DEBUG
clutter_actor_verify_map_state (self);
#endif
if (CLUTTER_ACTOR_IS_REALIZED (self))
return;
/* To be realized, our parent actors must be realized first.
* This will only succeed if we're inside a toplevel.
*/
if (self->priv->parent_actor != NULL)
clutter_actor_realize (self->priv->parent_actor);
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
/* toplevels can be realized at any time */
}
else
{
/* "Fail" the realization if parent is missing or unrealized;
* this should really be a g_warning() not some kind of runtime
* failure; how can an app possibly recover? Instead it's a bug
* in the app and the app should get an explanatory warning so
* someone can fix it. But for now it's too hard to fix this
* because e.g. ClutterTexture needs reworking.
*/
if (self->priv->parent_actor == NULL ||
!CLUTTER_ACTOR_IS_REALIZED (self->priv->parent_actor))
return;
}
CLUTTER_NOTE (ACTOR, "Realizing actor '%s' [%p]",
self->priv->name ? self->priv->name
: G_OBJECT_TYPE_NAME (self),
self);
CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
g_object_notify (G_OBJECT (self), "realized");
g_signal_emit (self, actor_signals[REALIZE], 0);
/* Stage actor is allowed to unset the realized flag again in its
* default signal handler, though that is a pathological situation.
*/
/* If realization "failed" we'll have to update child state. */
clutter_actor_update_map_state (self, MAP_STATE_CHECK);
}
void
clutter_actor_real_unrealize (ClutterActor *self)
{
/* we must be unmapped (implying our children are also unmapped) */
g_assert (!CLUTTER_ACTOR_IS_MAPPED (self));
if (CLUTTER_IS_CONTAINER (self))
clutter_container_foreach_with_internals (CLUTTER_CONTAINER (self),
CLUTTER_CALLBACK (clutter_actor_unrealize_not_hiding),
NULL);
}
/**
* clutter_actor_unrealize:
* @self: A #ClutterActor
*
* Frees up any underlying graphics resources needed by the actor to
* be displayed.
*
* Unrealization means the actor is now independent of any specific
* rendering context (is not attached to a specific toplevel stage).
*
* Because mapped actors must be realized, actors may not be
* unrealized if they are mapped. This function hides the actor to be
* sure it isn't mapped, an application-visible side effect that you
* may not be expecting.
*
* This function should not really be in the public API, because
* there isn't a good reason to call it. ClutterActor will already
* unrealize things for you when it's important to do so.
*
* If you were using clutter_actor_unrealize() in a dispose
* implementation, then don't, just chain up to ClutterActor's
* dispose.
*
* If you were using clutter_actor_unrealize() to implement
* unrealizing children of your container, then don't, ClutterActor
* will already take care of that.
*
* If you were using clutter_actor_unrealize() to re-realize to
* create your resources in a different way, then use
* _clutter_actor_rerealize() (inside Clutter) or just call your
* code that recreates your resources directly (outside Clutter).
*/
void
clutter_actor_unrealize (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (!CLUTTER_ACTOR_IS_MAPPED (self));
#ifdef CLUTTER_ENABLE_DEBUG
clutter_actor_verify_map_state (self);
#endif
clutter_actor_hide (self);
clutter_actor_unrealize_not_hiding (self);
}
/*
* clutter_actor_unrealize_not_hiding:
* @self: A #ClutterActor
*
* Frees up any underlying graphics resources needed by the actor to
* be displayed.
*
* Unrealization means the actor is now independent of any specific
* rendering context (is not attached to a specific toplevel stage).
*
* Because mapped actors must be realized, actors may not be
* unrealized if they are mapped. You must hide the actor or one of
* its parents before attempting to unrealize.
*
* This function is separate from clutter_actor_unrealize() because it
* does not automatically hide the actor.
* Actors need not be hidden to be unrealized, they just need to
* be unmapped. In fact we don't want to mess up the application's
* setting of the "visible" flag, so hiding is very undesirable.
*
* clutter_actor_unrealize() does a clutter_actor_hide() just for
* backward compatibility.
*/
static void
clutter_actor_unrealize_not_hiding (ClutterActor *self)
{
/* All callers of clutter_actor_unrealize_not_hiding() should have
* taken care of unmapping the actor first. This means
* all our children should also be unmapped.
*/
g_assert (!CLUTTER_ACTOR_IS_MAPPED (self));
if (!CLUTTER_ACTOR_IS_REALIZED (self))
return;
/* The default handler for the signal should recursively unrealize
* child actors. We want to unset the realized flag only _after_
* child actors are unrealized, to maintain invariants.
*/
g_signal_emit (self, actor_signals[UNREALIZE], 0);
CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
g_object_notify (G_OBJECT (self), "realized");
}
/*
* _clutter_actor_rerealize:
* @self: A #ClutterActor
* @callback: Function to call while unrealized
* @data: data for callback
*
* If an actor is already unrealized, this just calls the callback.
*
* If it is realized, it unrealizes temporarily, calls the callback,
* and then re-realizes the actor.
*
* As a side effect, leaves all children of the actor unrealized if
* the actor was realized but not showing. This is because when we
* unrealize the actor temporarily we must unrealize its children
* (e.g. children of a stage can't be realized if stage window is
* gone). And we aren't clever enough to save the realization state of
* all children. In most cases this should not matter, because
* the children will automatically realize when they next become mapped.
*/
void
_clutter_actor_rerealize (ClutterActor *self,
ClutterCallback callback,
void *data)
{
gboolean was_mapped;
gboolean was_showing;
gboolean was_realized;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
#ifdef CLUTTER_ENABLE_DEBUG
clutter_actor_verify_map_state (self);
#endif
was_realized = CLUTTER_ACTOR_IS_REALIZED (self);
was_mapped = CLUTTER_ACTOR_IS_MAPPED (self);
was_showing = CLUTTER_ACTOR_IS_VISIBLE (self);
/* Must be unmapped to unrealize. Note we only have to hide this
* actor if it was mapped (if all parents were showing). If actor
* is merely visible (but not mapped), then that's fine, we can
* leave it visible.
*/
if (was_mapped)
clutter_actor_hide (self);
g_assert (!CLUTTER_ACTOR_IS_MAPPED (self));
/* unrealize self and all children */
clutter_actor_unrealize_not_hiding (self);
if (callback != NULL)
{
(* callback) (self, data);
}
if (was_showing)
clutter_actor_show (self); /* will realize only if mapping implies it */
else if (was_realized)
clutter_actor_realize (self); /* realize self and all parents */
}
static void
clutter_actor_real_pick (ClutterActor *self,
const ClutterColor *color)
{
/* the default implementation is just to paint a rectangle
* with the same size of the actor using the passed color
*/
if (clutter_actor_should_pick_paint (self))
{
ClutterActorBox box = { 0, };
float width, height;
clutter_actor_get_allocation_box (self, &box);
width = box.x2 - box.x1;
height = box.y2 - box.y1;
cogl_set_source_color4ub (color->red,
color->green,
color->blue,
color->alpha);
cogl_rectangle (0, 0, width, height);
}
}
/**
* clutter_actor_should_pick_paint:
* @self: A #ClutterActor
*
* Should be called inside the implementation of the
* #ClutterActor::pick virtual function in order to check whether
* the actor should paint itself in pick mode or not.
*
* This function should never be called directly by applications.
*
* Return value: %TRUE if the actor should paint its silhouette,
* %FALSE otherwise
*/
gboolean
clutter_actor_should_pick_paint (ClutterActor *self)
{
ClutterMainContext *context;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
context = _clutter_context_get_default ();
if (CLUTTER_ACTOR_IS_MAPPED (self) &&
(G_UNLIKELY (context->pick_mode == CLUTTER_PICK_ALL) ||
CLUTTER_ACTOR_IS_REACTIVE (self)))
return TRUE;
return FALSE;
}
static void
clutter_actor_real_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
/* Default implementation is always 0x0, usually an actor
* using this default is relying on someone to set the
* request manually
*/
CLUTTER_NOTE (LAYOUT, "Default preferred width: 0, 0");
if (min_width_p)
*min_width_p = 0;
if (natural_width_p)
*natural_width_p = 0;
}
static void
clutter_actor_real_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
/* Default implementation is always 0x0, usually an actor
* using this default is relying on someone to set the
* request manually
*/
CLUTTER_NOTE (LAYOUT, "Default preferred height: 0, 0");
if (min_height_p)
*min_height_p = 0;
if (natural_height_p)
*natural_height_p = 0;
}
static void
clutter_actor_store_old_geometry (ClutterActor *self,
ClutterActorBox *box)
{
*box = self->priv->allocation;
}
static inline void
clutter_actor_notify_if_geometry_changed (ClutterActor *self,
const ClutterActorBox *old)
{
ClutterActorPrivate *priv = self->priv;
GObject *obj = G_OBJECT (self);
g_object_freeze_notify (obj);
/* to avoid excessive requisition or allocation cycles we
* use the cached values.
*
* - if we don't have an allocation we assume that we need
* to notify anyway
* - if we don't have a width or a height request we notify
* width and height
* - if we have a valid allocation then we check the old
* bounding box with the current allocation and we notify
* the changes
*/
if (priv->needs_allocation)
{
g_object_notify (obj, "x");
g_object_notify (obj, "y");
g_object_notify (obj, "width");
g_object_notify (obj, "height");
}
else if (priv->needs_width_request || priv->needs_height_request)
{
g_object_notify (obj, "width");
g_object_notify (obj, "height");
}
else
{
gfloat xu, yu;
gfloat widthu, heightu;
xu = priv->allocation.x1;
yu = priv->allocation.y1;
widthu = priv->allocation.x2 - priv->allocation.x1;
heightu = priv->allocation.y2 - priv->allocation.y1;
if (xu != old->x1)
g_object_notify (obj, "x");
if (yu != old->y1)
g_object_notify (obj, "y");
if (widthu != (old->x2 - old->x1))
g_object_notify (obj, "width");
if (heightu != (old->y2 - old->y1))
g_object_notify (obj, "height");
}
g_object_thaw_notify (obj);
}
static void
clutter_actor_real_allocate (ClutterActor *self,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
ClutterActorPrivate *priv = self->priv;
gboolean x1_changed, y1_changed, x2_changed, y2_changed;
gboolean flags_changed;
ClutterActorBox old = { 0, };
clutter_actor_store_old_geometry (self, &old);
x1_changed = priv->allocation.x1 != box->x1;
y1_changed = priv->allocation.y1 != box->y1;
x2_changed = priv->allocation.x2 != box->x2;
y2_changed = priv->allocation.y2 != box->y2;
flags_changed = priv->allocation_flags != flags;
priv->allocation = *box;
priv->allocation_flags = flags;
priv->needs_allocation = FALSE;
g_object_freeze_notify (G_OBJECT (self));
if (x1_changed || y1_changed || x2_changed || y2_changed || flags_changed)
{
g_object_notify (G_OBJECT (self), "allocation");
/* we also emit the ::allocation-changed signal for people
* that wish to track the allocation flags
*/
g_signal_emit (self, actor_signals[ALLOCATION_CHANGED], 0,
box,
flags);
}
clutter_actor_notify_if_geometry_changed (self, &old);
g_object_thaw_notify (G_OBJECT (self));
}
static void
clutter_actor_queue_redraw_with_origin (ClutterActor *self,
ClutterActor *origin)
{
/* no point in queuing a redraw on a destroyed actor */
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION)
return;
/* NB: We can't bail out early here if the actor is hidden in case
* the actor bas been cloned. In this case the clone will need to
* receive the signal so it can queue its own redraw.
*/
/* calls klass->queue_redraw in default handler */
g_signal_emit (self, actor_signals[QUEUE_REDRAW], 0, origin);
}
static void
clutter_actor_real_queue_redraw (ClutterActor *self,
ClutterActor *origin)
{
ClutterActor *parent;
CLUTTER_NOTE (PAINT, "Redraw queued on '%s'",
clutter_actor_get_name (self) ? clutter_actor_get_name (self)
: G_OBJECT_TYPE_NAME (self));
/* no point in queuing a redraw on a destroyed actor */
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION)
return;
/* If the actor isn't visible, we still had to emit the signal
* to allow for a ClutterClone, but the appearance of the parent
* won't change so we don't have to propagate up the hierarchy.
*/
if (!CLUTTER_ACTOR_IS_VISIBLE (self))
return;
/* Although we could determine here that a full stage redraw
* has already been queued and immediately bail out, we actually
* guarantee that we will propagate a queue-redraw signal to our
* parent at least once so that it's possible to implement a
* container that tracks which of its children have queued a
* redraw.
*/
if (self->priv->propagated_one_redraw)
{
ClutterActor *stage = clutter_actor_get_stage (self);
if (stage &&
_clutter_stage_has_full_redraw_queued (CLUTTER_STAGE (stage)))
return;
}
self->priv->propagated_one_redraw = TRUE;
/* notify parents, if they are all visible eventually we'll
* queue redraw on the stage, which queues the redraw idle.
*/
parent = clutter_actor_get_parent (self);
if (parent != NULL)
{
/* this will go up recursively */
clutter_actor_queue_redraw_with_origin (parent, origin);
}
}
void
clutter_actor_real_queue_relayout (ClutterActor *self)
{
ClutterActorPrivate *priv = self->priv;
/* no point in queueing a redraw on a destroyed actor */
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION)
return;
priv->needs_width_request = TRUE;
priv->needs_height_request = TRUE;
priv->needs_allocation = TRUE;
/* reset the cached size requests */
memset (priv->width_requests, 0,
N_CACHED_SIZE_REQUESTS * sizeof (SizeRequest));
memset (priv->height_requests, 0,
N_CACHED_SIZE_REQUESTS * sizeof (SizeRequest));
/* always repaint also (no-op if not mapped) */
clutter_actor_queue_redraw (self);
/* We need to go all the way up the hierarchy */
if (priv->parent_actor)
clutter_actor_queue_relayout (priv->parent_actor);
}
/* like ClutterVertex, but with a w component */
typedef struct {
gfloat x;
gfloat y;
gfloat z;
gfloat w;
} full_vertex_t;
/* copies a fixed vertex into a ClutterVertex */
static inline void
full_vertex_to_units (const full_vertex_t *f,
ClutterVertex *u)
{
u->x = f->x;
u->y = f->y;
u->z = f->z;
}
/* transforms a 4-tuple of coordinates using @matrix and
* places the result into a @vertex
*/
static inline void
full_vertex_transform (const CoglMatrix *matrix,
gfloat x,
gfloat y,
gfloat z,
gfloat w,
full_vertex_t *vertex)
{
cogl_matrix_transform_point (matrix, &x, &y, &z, &w);
vertex->x = x;
vertex->y = y;
vertex->z = z;
vertex->w = w;
}
/* Help macros to scale from OpenGL <-1,1> coordinates system to our
* X-window based <0,window-size> coordinates
*/
#define MTX_GL_SCALE_X(x,w,v1,v2) ((((((x) / (w)) + 1.0) / 2) * (v1)) + (v2))
#define MTX_GL_SCALE_Y(y,w,v1,v2) ((v1) - (((((y) / (w)) + 1.0) / 2) * (v1)) + (v2))
#define MTX_GL_SCALE_Z(z,w,v1,v2) (MTX_GL_SCALE_X ((z), (w), (v1), (v2)))
/* scales a fixed @vertex using @matrix and @viewport, and
* transforms the result into a ClutterVertex, filling @vertex_p
*/
static inline void
full_vertex_scale (const CoglMatrix *matrix,
const full_vertex_t *vertex,
const gfloat viewport[],
ClutterVertex *vertex_p)
{
gfloat v_x, v_y, v_width, v_height;
full_vertex_t tmp;
tmp = *vertex;
cogl_matrix_transform_point (matrix,
&tmp.x,
&tmp.y,
&tmp.z,
&tmp.w);
v_x = viewport[0];
v_y = viewport[1];
v_width = viewport[2];
v_height = viewport[3];
tmp.x = MTX_GL_SCALE_X (tmp.x, tmp.w, v_width, v_x);
tmp.y = MTX_GL_SCALE_Y (tmp.y, tmp.w, v_height, v_y);
tmp.z = MTX_GL_SCALE_Z (tmp.z, tmp.w, v_width, v_x);
tmp.w = 0;
full_vertex_to_units (&tmp, vertex_p);
}
/* Applies the transforms associated with this actor and its ancestors,
* retrieves the resulting OpenGL modelview matrix, and uses the matrix
* to transform the supplied point
*
* The point coordinates are in-out parameters
*/
static void
clutter_actor_transform_point_relative (ClutterActor *actor,
ClutterActor *ancestor,
gfloat *x,
gfloat *y,
gfloat *z,
gfloat *w)
{
full_vertex_t vertex;
CoglMatrix matrix;
vertex.x = (x != NULL) ? *x : 0;
vertex.y = (y != NULL) ? *y : 0;
vertex.z = (z != NULL) ? *z : 0;
vertex.w = (w != NULL) ? *w : 0;
cogl_push_matrix();
_clutter_actor_apply_modelview_transform_recursive (actor, ancestor);
cogl_get_modelview_matrix (&matrix);
cogl_matrix_transform_point (&matrix,
&vertex.x,
&vertex.y,
&vertex.z,
&vertex.w);
cogl_pop_matrix();
if (x)
*x = vertex.x;
if (y)
*y = vertex.y;
if (z)
*z = vertex.z;
if (w)
*w = vertex.w;
}
/* Applies the transforms associated with this actor and its ancestors,
* retrieves the resulting OpenGL modelview matrix, and uses the matrix
* to transform the supplied point
*/
static void
clutter_actor_transform_point (ClutterActor *actor,
gfloat *x,
gfloat *y,
gfloat *z,
gfloat *w)
{
full_vertex_t vertex;
CoglMatrix matrix;
vertex.x = (x != NULL) ? *x : 0;
vertex.y = (y != NULL) ? *y : 0;
vertex.z = (z != NULL) ? *z : 0;
vertex.w = (w != NULL) ? *w : 0;
cogl_push_matrix();
_clutter_actor_apply_modelview_transform_recursive (actor, NULL);
cogl_get_modelview_matrix (&matrix);
cogl_matrix_transform_point (&matrix,
&vertex.x,
&vertex.y,
&vertex.z,
&vertex.w);
cogl_pop_matrix();
if (x)
*x = vertex.x;
if (y)
*y = vertex.y;
if (z)
*z = vertex.z;
if (w)
*w = vertex.w;
}
/**
* clutter_actor_apply_relative_transform_to_point:
* @self: A #ClutterActor
* @ancestor: (allow-none): A #ClutterActor ancestor, or %NULL to use the
* default #ClutterStage
* @point: A point as #ClutterVertex
* @vertex: The translated #ClutterVertex
*
* Transforms @point in coordinates relative to the actor into
* ancestor-relative coordinates using the relevant transform
* stack (i.e. scale, rotation, etc).
*
* If @ancestor is %NULL the ancestor will be the #ClutterStage. In
* this case, the coordinates returned will be the coordinates on
* the stage before the projection is applied. This is different from
* the behaviour of clutter_actor_apply_transform_to_point().
*
* Since: 0.6
*/
void
clutter_actor_apply_relative_transform_to_point (ClutterActor *self,
ClutterActor *ancestor,
const ClutterVertex *point,
ClutterVertex *vertex)
{
gfloat x, y, z, w;
full_vertex_t tmp;
gfloat v[4];
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (ancestor == NULL || CLUTTER_IS_ACTOR (ancestor));
g_return_if_fail (point != NULL);
g_return_if_fail (vertex != NULL);
x = point->x;
y = point->y;
z = point->z;
w = 1.0;
/* First we tranform the point using the OpenGL modelview matrix */
clutter_actor_transform_point_relative (self, ancestor, &x, &y, &z, &w);
cogl_get_viewport (v);
/* The w[3] parameter should always be 1.0 here, so we ignore it; otherwise
* we would have to divide the original verts with it.
*/
tmp.x = (x + 0.5) * v[2];
tmp.y = (0.5 - y) * v[3];
tmp.z = (z + 0.5) * v[2];
tmp.w = 0;
full_vertex_to_units (&tmp, vertex);
}
/**
* clutter_actor_apply_transform_to_point:
* @self: A #ClutterActor
* @point: A point as #ClutterVertex
* @vertex: The translated #ClutterVertex
*
* Transforms @point in coordinates relative to the actor
* into screen-relative coordinates with the current actor
* transformation (i.e. scale, rotation, etc)
*
* Since: 0.4
**/
void
clutter_actor_apply_transform_to_point (ClutterActor *self,
const ClutterVertex *point,
ClutterVertex *vertex)
{
full_vertex_t tmp = { 0, };
gfloat x, y, z, w;
CoglMatrix matrix_p;
gfloat v[4];
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (point != NULL);
g_return_if_fail (vertex != NULL);
x = point->x;
y = point->y;
z = point->z;
w = 1.0;
/* First we tranform the point using the OpenGL modelview matrix */
clutter_actor_transform_point (self, &x, &y, &z, &w);
tmp.x = x;
tmp.y = y;
tmp.z = z;
tmp.w = w;
cogl_get_projection_matrix (&matrix_p);
cogl_get_viewport (v);
/* Now, transform it again with the projection matrix */
cogl_matrix_transform_point (&matrix_p,
&tmp.x,
&tmp.y,
&tmp.z,
&tmp.w);
/* Finaly translate from OpenGL coords to window coords */
vertex->x = MTX_GL_SCALE_X (tmp.x, tmp.w, v[2], v[0]);
vertex->y = MTX_GL_SCALE_Y (tmp.y, tmp.w, v[3], v[1]);
vertex->z = MTX_GL_SCALE_Z (tmp.z, tmp.w, v[2], v[0]);
}
/* Recursively tranform supplied vertices with the tranform for the current
* actor and up to the ancestor (like clutter_actor_transform_point() but
* for all the vertices in one go).
*/
static void
clutter_actor_transform_vertices_relative (ClutterActor *self,
ClutterActor *ancestor,
full_vertex_t vertices[])
{
ClutterActorPrivate *priv = self->priv;
gfloat width, height;
CoglMatrix mtx;
width = priv->allocation.x2 - priv->allocation.x1;
height = priv->allocation.y2 - priv->allocation.y1;
cogl_push_matrix();
_clutter_actor_apply_modelview_transform_recursive (self, ancestor);
cogl_get_modelview_matrix (&mtx);
full_vertex_transform (&mtx, 0, 0, 0, 1.0, &vertices[0]);
full_vertex_transform (&mtx, width, 0, 0, 1.0, &vertices[1]);
full_vertex_transform (&mtx, 0, height, 0, 1.0, &vertices[2]);
full_vertex_transform (&mtx, width, height, 0, 1.0, &vertices[3]);
cogl_pop_matrix();
}
/* _clutter_actor_ensure_stage_current
*
* Ensures that the actors corresponding stage is made current so we
* have a valid viewport, projection matrix and modelview matrix stack.
*/
static void
_clutter_actor_ensure_stage_current (ClutterActor *self)
{
ClutterActor *stage;
/* We essentially have to dupe some code from clutter_redraw() here
* to make sure GL Matrices etc are initialised if we're called and we
* haven't yet rendered anything.
*
* Simply duping code for now in wait for Cogl cleanup that can hopefully
* address this in a nicer way.
*/
stage = clutter_actor_get_stage (self);
/* FIXME: if were not yet added to a stage, its probably unsafe to
* return default - ideally the func should fail
*/
if (stage == NULL)
stage = clutter_stage_get_default ();
clutter_stage_ensure_current (CLUTTER_STAGE (stage));
_clutter_stage_maybe_setup_viewport (CLUTTER_STAGE (stage));
}
/* _clutter_actor_get_relative_modelview:
*
* Retrives the modelview transformation relative to some ancestor actor, or
* the stage if NULL is given for the ancestor.
*
* It assumes you currently have an empty matrix stack.
*/
/* FIXME: We should be caching the stage relative modelview along with the
* actor itself */
/* TODO: Replace all other occurrences of this code pattern in clutter-actor.c:
* cogl_push_matrix();
* _clutter_actor_apply_modelview_transform_recursive (self, ancestor)
* cogl_get_modelview_matrix()
* cogl_pop_matrix();
* with a call to this function:
*/
void
_clutter_actor_get_relative_modelview (ClutterActor *self,
ClutterActor *ancestor,
CoglMatrix *matrix)
{
_clutter_actor_ensure_stage_current (self);
/* FIXME: init_identity instead of assuming we have an empty stack! */
cogl_push_matrix ();
_clutter_actor_apply_modelview_transform_recursive (self, ancestor);
cogl_get_modelview_matrix (matrix);
cogl_pop_matrix ();
}
/* _clutter_actor_get_projection_and_viewport
*
* Retrieves the projection matrix and viewport for the actors corresponding
* stage.
*/
void
_clutter_actor_get_projection_and_viewport (ClutterActor *self,
CoglMatrix *matrix,
float *viewport)
{
_clutter_actor_ensure_stage_current (self);
cogl_get_projection_matrix (matrix);
cogl_get_viewport (viewport);
}
/* Recursively transform supplied box with the transform for the current
* actor and all its ancestors (like clutter_actor_transform_point()
* but for all the vertices in one go) and project it into screen
* coordinates
*/
void
_clutter_actor_transform_and_project_box (ClutterActor *self,
const ClutterActorBox *box,
ClutterVertex verts[])
{
CoglMatrix mtx;
CoglMatrix mtx_p;
float v[4];
full_vertex_t vertices[4];
_clutter_actor_get_relative_modelview (self, NULL, &mtx);
full_vertex_transform (&mtx, box->x1, box->y1, 0, 1.0, &vertices[0]);
full_vertex_transform (&mtx, box->x2, box->y1, 0, 1.0, &vertices[1]);
full_vertex_transform (&mtx, box->x1, box->y2, 0, 1.0, &vertices[2]);
full_vertex_transform (&mtx, box->x2, box->y2, 0, 1.0, &vertices[3]);
_clutter_actor_get_projection_and_viewport (self, &mtx_p, v);
full_vertex_scale (&mtx_p, &vertices[0], v, &verts[0]);
full_vertex_scale (&mtx_p, &vertices[1], v, &verts[1]);
full_vertex_scale (&mtx_p, &vertices[2], v, &verts[2]);
full_vertex_scale (&mtx_p, &vertices[3], v, &verts[3]);
}
/**
* clutter_actor_get_allocation_vertices:
* @self: A #ClutterActor
* @ancestor: (allow-none): A #ClutterActor to calculate the vertices
* against, or %NULL to use the default #ClutterStage
* @verts: (out) (array fixed-size=4): return location for an array of
* 4 #ClutterVertex in which to store the result.
*
* Calculates the transformed coordinates of the four corners of the
* actor in the plane of @ancestor. The returned vertices relate to
* the #ClutterActorBox coordinates as follows:
* <itemizedlist>
* <listitem><para>@verts[0] contains (x1, y1)</para></listitem>
* <listitem><para>@verts[1] contains (x2, y1)</para></listitem>
* <listitem><para>@verts[2] contains (x1, y2)</para></listitem>
* <listitem><para>@verts[3] contains (x2, y2)</para></listitem>
* </itemizedlist>
*
* If @ancestor is %NULL the ancestor will be the #ClutterStage. In
* this case, the coordinates returned will be the coordinates on
* the stage before the projection is applied. This is different from
* the behaviour of clutter_actor_get_abs_allocation_vertices().
*
* Since: 0.6
*/
void
clutter_actor_get_allocation_vertices (ClutterActor *self,
ClutterActor *ancestor,
ClutterVertex verts[])
{
ClutterActorPrivate *priv;
ClutterActor *stage;
gfloat v[4];
full_vertex_t vertices[4];
full_vertex_t tmp = { 0, };
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (ancestor == NULL || CLUTTER_IS_ACTOR (ancestor));
priv = self->priv;
/* We essentially have to dupe some code from clutter_redraw() here
* to make sure GL Matrices etc are initialised if we're called and we
* havn't yet rendered anything.
*
* Simply duping code for now in wait for Cogl cleanup that can hopefully
* address this in a nicer way.
*/
stage = clutter_actor_get_stage (self);
/* FIXME: if were not yet added to a stage, its probably unsafe to
* return default - idealy the func should fail
*/
if (stage == NULL)
stage = clutter_stage_get_default ();
clutter_stage_ensure_current (CLUTTER_STAGE (stage));
_clutter_stage_maybe_setup_viewport (CLUTTER_STAGE (stage));
/* if the actor needs to be allocated we force a relayout, so that
* clutter_actor_transform_vertices_relative() will have valid values
* to use in the transformations
*/
if (priv->needs_allocation)
_clutter_stage_maybe_relayout (stage);
clutter_actor_transform_vertices_relative (self, ancestor, vertices);
cogl_get_viewport (v);
/* The w[3] parameter should always be 1.0 here, so we ignore it;
* otherwise we would have to divide the original verts with it.
*/
tmp.x = ((vertices[0].x + 0.5) * v[2]);
tmp.y = ((0.5 - vertices[0].y) * v[3]);
tmp.z = ((vertices[0].z + 0.5) * v[2]);
full_vertex_to_units (&tmp, &verts[0]);
tmp.x = ((vertices[1].x + 0.5) * v[2]);
tmp.y = ((0.5 - vertices[1].y) * v[3]);
tmp.z = ((vertices[1].z + 0.5) * v[2]);
full_vertex_to_units (&tmp, &verts[1]);
tmp.x = ((vertices[2].x + 0.5) * v[2]);
tmp.y = ((0.5 - vertices[2].y) * v[3]);
tmp.z = ((vertices[2].z + 0.5) * v[2]);
full_vertex_to_units (&tmp, &verts[2]);
tmp.x = ((vertices[3].x + 0.5) * v[2]);
tmp.y = ((0.5 - vertices[3].y) * v[3]);
tmp.z = ((vertices[3].z + 0.5) * v[2]);
full_vertex_to_units (&tmp, &verts[3]);
}
/**
* clutter_actor_get_abs_allocation_vertices:
* @self: A #ClutterActor
* @verts: (out) (array fixed-size=4): Pointer to a location of an array
* of 4 #ClutterVertex where to store the result.
*
* Calculates the transformed screen coordinates of the four corners of
* the actor; the returned vertices relate to the #ClutterActorBox
* coordinates as follows:
* <itemizedlist>
* <listitem><para>v[0] contains (x1, y1)</para></listitem>
* <listitem><para>v[1] contains (x2, y1)</para></listitem>
* <listitem><para>v[2] contains (x1, y2)</para></listitem>
* <listitem><para>v[3] contains (x2, y2)</para></listitem>
* </itemizedlist>
*
* Since: 0.4
*/
void
clutter_actor_get_abs_allocation_vertices (ClutterActor *self,
ClutterVertex verts[])
{
ClutterActorPrivate *priv;
ClutterActorBox actor_space_allocation;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
/* if the actor needs to be allocated we force a relayout, so that
* the actor allocation box will be valid for
* _clutter_actor_transform_and_project_box()
*/
if (priv->needs_allocation)
{
ClutterActor *stage = clutter_actor_get_stage (self);
/* FIXME: if were not yet added to a stage, its probably unsafe to
* return default - idealy the func should fail
*/
if (stage == NULL)
stage = clutter_stage_get_default ();
_clutter_stage_maybe_relayout (stage);
}
/* NB: _clutter_actor_transform_and_project_box expects a box in the actor's
* own coordinate space... */
actor_space_allocation.x1 = 0;
actor_space_allocation.y1 = 0;
actor_space_allocation.x2 =
self->priv->allocation.x2 - self->priv->allocation.x1;
actor_space_allocation.y2 =
self->priv->allocation.y2 - self->priv->allocation.y1;
_clutter_actor_transform_and_project_box (self,
&actor_space_allocation,
verts);
}
static void
clutter_actor_real_apply_transform (ClutterActor *self,
CoglMatrix *matrix)
{
ClutterActorPrivate *priv = self->priv;
gboolean is_stage = CLUTTER_IS_STAGE (self);
if (!is_stage)
{
cogl_matrix_translate (matrix,
priv->allocation.x1,
priv->allocation.y1,
0.0);
}
if (priv->z)
cogl_matrix_translate (matrix, 0, 0, priv->z);
/*
* because the rotation involves translations, we must scale before
* applying the rotations (if we apply the scale after the rotations,
* the translations included in the rotation are not scaled and so the
* entire object will move on the screen as a result of rotating it).
*/
if (priv->scale_x != 1.0 || priv->scale_y != 1.0)
{
TRANSFORM_ABOUT_ANCHOR_COORD (self, matrix,
&priv->scale_center,
cogl_matrix_scale (matrix,
priv->scale_x,
priv->scale_y,
1.0));
}
if (priv->rzang)
TRANSFORM_ABOUT_ANCHOR_COORD (self, matrix,
&priv->rz_center,
cogl_matrix_rotate (matrix,
priv->rzang,
0, 0, 1.0));
if (priv->ryang)
TRANSFORM_ABOUT_ANCHOR_COORD (self, matrix,
&priv->ry_center,
cogl_matrix_rotate (matrix,
priv->ryang,
0, 1.0, 0));
if (priv->rxang)
TRANSFORM_ABOUT_ANCHOR_COORD (self, matrix,
&priv->rx_center,
cogl_matrix_rotate (matrix,
priv->rxang,
1.0, 0, 0));
if (!is_stage && !clutter_anchor_coord_is_zero (&priv->anchor))
{
gfloat x, y, z;
clutter_anchor_coord_get_units (self, &priv->anchor, &x, &y, &z);
cogl_matrix_translate (matrix, -x, -y, -z);
}
}
/* Applies the transforms associated with this actor to the
* OpenGL modelview matrix.
*
* This function does not push/pop matrix; it is the responsibility
* of the caller to do so as appropriate
*/
static void
_clutter_actor_apply_modelview_transform (ClutterActor *self)
{
CoglMatrix matrix, cur, new;
cogl_matrix_init_identity (&matrix);
clutter_actor_get_transformation_matrix (self, &matrix);
cogl_get_modelview_matrix (&cur);
cogl_matrix_multiply (&new, &cur, &matrix);
cogl_set_modelview_matrix (&new);
}
/* Recursively applies the transforms associated with this actor and
* its ancestors to the OpenGL modelview matrix. Use NULL if you want this
* to go all the way down to the stage.
*
* This function does not push/pop matrix; it is the responsibility
* of the caller to do so as appropriate
*/
void
_clutter_actor_apply_modelview_transform_recursive (ClutterActor *self,
ClutterActor *ancestor)
{
ClutterActor *parent, *stage;
parent = clutter_actor_get_parent (self);
/*
* If we reached the ancestor, quit
* NB: NULL ancestor means the stage, and this will not trigger
* (as it should not)
*/
if (self == ancestor)
return;
stage = clutter_actor_get_stage (self);
/* FIXME: if were not yet added to a stage, its probably unsafe to
* return default - idealy the func should fail
*/
if (stage == NULL)
stage = clutter_stage_get_default ();
if (parent != NULL)
_clutter_actor_apply_modelview_transform_recursive (parent, ancestor);
else if (self != stage)
_clutter_actor_apply_modelview_transform (stage);
_clutter_actor_apply_modelview_transform (self);
}
/**
* clutter_actor_paint:
* @self: A #ClutterActor
*
* Renders the actor to display.
*
* This function should not be called directly by applications.
* Call clutter_actor_queue_redraw() to queue paints, instead.
*
* This function will emit the #ClutterActor::paint signal.
*/
void
clutter_actor_paint (ClutterActor *self)
{
ClutterActorPrivate *priv;
ClutterMainContext *context;
gboolean clip_set = FALSE;
CLUTTER_STATIC_COUNTER (actor_paint_counter,
"Actor real-paint counter",
"Increments each time any actor is painted",
0 /* no application private data */);
CLUTTER_STATIC_COUNTER (actor_pick_counter,
"Actor pick-paint counter",
"Increments each time any actor is painted "
"for picking",
0 /* no application private data */);
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
context = _clutter_context_get_default ();
/* It's an important optimization that we consider painting of
* actors with 0 opacity to be a NOP... */
if (G_LIKELY (context->pick_mode == CLUTTER_PICK_NONE) &&
/* If the actor is being painted from a clone then check the
clone's opacity instead */
(priv->opacity_parent ? priv->opacity_parent->priv : priv)->opacity == 0)
{
priv->propagated_one_redraw = FALSE;
return;
}
/* if we aren't paintable (not in a toplevel with all
* parents paintable) then do nothing.
*/
if (!CLUTTER_ACTOR_IS_MAPPED (self))
return;
/* mark that we are in the paint process */
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT);
cogl_push_matrix();
if (priv->enable_model_view_transform)
_clutter_actor_apply_modelview_transform (self);
if (priv->has_clip)
{
cogl_clip_push_rectangle (priv->clip[0],
priv->clip[1],
priv->clip[0] + priv->clip[2],
priv->clip[1] + priv->clip[3]);
clip_set = TRUE;
}
else if (priv->clip_to_allocation)
{
gfloat width, height;
width = priv->allocation.x2 - priv->allocation.x1;
height = priv->allocation.y2 - priv->allocation.y1;
cogl_clip_push_rectangle (0, 0, width, height);
clip_set = TRUE;
}
if (G_UNLIKELY (context->pick_mode != CLUTTER_PICK_NONE))
{
ClutterColor col = { 0, };
CLUTTER_COUNTER_INC (_clutter_uprof_context, actor_pick_counter);
_clutter_id_to_color (clutter_actor_get_gid (self), &col);
/* Actor will then paint silhouette of itself in supplied
* color. See clutter_stage_get_actor_at_pos() for where
* picking is enabled.
*/
g_signal_emit (self, actor_signals[PICK], 0, &col);
}
else
{
CLUTTER_COUNTER_INC (_clutter_uprof_context, actor_paint_counter);
clutter_actor_shader_pre_paint (self, FALSE);
self->priv->propagated_one_redraw = FALSE;
g_signal_emit (self, actor_signals[PAINT], 0);
clutter_actor_shader_post_paint (self);
}
if (clip_set)
cogl_clip_pop();
cogl_pop_matrix();
/* paint sequence complete */
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT);
}
/* internal helper function set the rotation angle without affecting
the center point
*/
static void
clutter_actor_set_rotation_internal (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle)
{
ClutterActorPrivate *priv = self->priv;
g_object_ref (self);
g_object_freeze_notify (G_OBJECT (self));
switch (axis)
{
case CLUTTER_X_AXIS:
priv->rxang = angle;
g_object_notify (G_OBJECT (self), "rotation-angle-x");
break;
case CLUTTER_Y_AXIS:
priv->ryang = angle;
g_object_notify (G_OBJECT (self), "rotation-angle-y");
break;
case CLUTTER_Z_AXIS:
priv->rzang = angle;
g_object_notify (G_OBJECT (self), "rotation-angle-z");
break;
}
g_object_thaw_notify (G_OBJECT (self));
g_object_unref (self);
clutter_actor_queue_redraw (self);
}
static void
clutter_actor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterActor *actor = CLUTTER_ACTOR (object);
ClutterActorPrivate *priv = actor->priv;
switch (prop_id)
{
case PROP_X:
clutter_actor_set_x (actor, g_value_get_float (value));
break;
case PROP_Y:
clutter_actor_set_y (actor, g_value_get_float (value));
break;
case PROP_WIDTH:
clutter_actor_set_width (actor, g_value_get_float (value));
break;
case PROP_HEIGHT:
clutter_actor_set_height (actor, g_value_get_float (value));
break;
case PROP_FIXED_X:
clutter_actor_set_x (actor, g_value_get_float (value));
break;
case PROP_FIXED_Y:
clutter_actor_set_y (actor, g_value_get_float (value));
break;
case PROP_FIXED_POSITION_SET:
clutter_actor_set_fixed_position_set (actor, g_value_get_boolean (value));
break;
case PROP_MIN_WIDTH:
clutter_actor_set_min_width (actor, g_value_get_float (value));
break;
case PROP_MIN_HEIGHT:
clutter_actor_set_min_height (actor, g_value_get_float (value));
break;
case PROP_NATURAL_WIDTH:
clutter_actor_set_natural_width (actor, g_value_get_float (value));
break;
case PROP_NATURAL_HEIGHT:
clutter_actor_set_natural_height (actor, g_value_get_float (value));
break;
case PROP_MIN_WIDTH_SET:
clutter_actor_set_min_width_set (actor, g_value_get_boolean (value));
break;
case PROP_MIN_HEIGHT_SET:
clutter_actor_set_min_height_set (actor, g_value_get_boolean (value));
break;
case PROP_NATURAL_WIDTH_SET:
clutter_actor_set_natural_width_set (actor, g_value_get_boolean (value));
break;
case PROP_NATURAL_HEIGHT_SET:
clutter_actor_set_natural_height_set (actor, g_value_get_boolean (value));
break;
case PROP_REQUEST_MODE:
clutter_actor_set_request_mode (actor, g_value_get_enum (value));
break;
case PROP_DEPTH:
clutter_actor_set_depth (actor, g_value_get_float (value));
break;
case PROP_OPACITY:
clutter_actor_set_opacity (actor, g_value_get_uint (value));
break;
case PROP_NAME:
clutter_actor_set_name (actor, g_value_get_string (value));
break;
case PROP_VISIBLE:
if (g_value_get_boolean (value) == TRUE)
clutter_actor_show (actor);
else
clutter_actor_hide (actor);
break;
case PROP_SCALE_X:
clutter_actor_set_scale (actor,
g_value_get_double (value),
priv->scale_y);
break;
case PROP_SCALE_Y:
clutter_actor_set_scale (actor,
priv->scale_x,
g_value_get_double (value));
break;
case PROP_SCALE_CENTER_X:
{
gfloat center_x = g_value_get_float (value);
gfloat center_y;
clutter_anchor_coord_get_units (actor, &priv->scale_center,
NULL,
&center_y,
NULL);
clutter_actor_set_scale_full (actor,
priv->scale_x,
priv->scale_y,
center_x,
center_y);
}
break;
case PROP_SCALE_CENTER_Y:
{
gfloat center_y = g_value_get_float (value);
gfloat center_x;
clutter_anchor_coord_get_units (actor, &priv->scale_center,
&center_x,
NULL,
NULL);
clutter_actor_set_scale_full (actor,
priv->scale_x,
priv->scale_y,
center_x,
center_y);
}
break;
case PROP_SCALE_GRAVITY:
clutter_actor_set_scale_with_gravity (actor,
priv->scale_x,
priv->scale_y,
g_value_get_enum (value));
break;
case PROP_CLIP:
{
const ClutterGeometry *geom = g_value_get_boxed (value);
clutter_actor_set_clip (actor,
geom->x, geom->y,
geom->width, geom->height);
}
break;
case PROP_CLIP_TO_ALLOCATION:
if (priv->clip_to_allocation != g_value_get_boolean (value))
{
priv->clip_to_allocation = g_value_get_boolean (value);
clutter_actor_queue_redraw (actor);
}
break;
case PROP_REACTIVE:
clutter_actor_set_reactive (actor, g_value_get_boolean (value));
break;
case PROP_ROTATION_ANGLE_X:
clutter_actor_set_rotation_internal (actor,
CLUTTER_X_AXIS,
g_value_get_double (value));
break;
case PROP_ROTATION_ANGLE_Y:
clutter_actor_set_rotation_internal (actor,
CLUTTER_Y_AXIS,
g_value_get_double (value));
break;
case PROP_ROTATION_ANGLE_Z:
clutter_actor_set_rotation_internal (actor,
CLUTTER_Z_AXIS,
g_value_get_double (value));
break;
case PROP_ROTATION_CENTER_X:
{
const ClutterVertex *center;
if ((center = g_value_get_boxed (value)))
clutter_actor_set_rotation (actor,
CLUTTER_X_AXIS,
priv->rxang,
center->x,
center->y,
center->z);
}
break;
case PROP_ROTATION_CENTER_Y:
{
const ClutterVertex *center;
if ((center = g_value_get_boxed (value)))
clutter_actor_set_rotation (actor,
CLUTTER_Y_AXIS,
priv->ryang,
center->x,
center->y,
center->z);
}
break;
case PROP_ROTATION_CENTER_Z:
{
const ClutterVertex *center;
if ((center = g_value_get_boxed (value)))
clutter_actor_set_rotation (actor,
CLUTTER_Z_AXIS,
priv->rzang,
center->x,
center->y,
center->z);
}
break;
case PROP_ROTATION_CENTER_Z_GRAVITY:
clutter_actor_set_z_rotation_from_gravity (actor, priv->rzang,
g_value_get_enum (value));
break;
case PROP_ANCHOR_X:
{
gfloat anchor_x = g_value_get_float (value);
gfloat anchor_y;
clutter_anchor_coord_get_units (actor, &priv->anchor,
NULL,
&anchor_y,
NULL);
clutter_actor_set_anchor_point (actor, anchor_x, anchor_y);
}
break;
case PROP_ANCHOR_Y:
{
gfloat anchor_y = g_value_get_float (value);
gfloat anchor_x;
clutter_anchor_coord_get_units (actor, &priv->anchor,
&anchor_x,
NULL,
NULL);
clutter_actor_set_anchor_point (actor, anchor_x, anchor_y);
}
break;
case PROP_ANCHOR_GRAVITY:
clutter_actor_set_anchor_point_from_gravity (actor,
g_value_get_enum (value));
break;
case PROP_SHOW_ON_SET_PARENT:
priv->show_on_set_parent = g_value_get_boolean (value);
break;
case PROP_TEXT_DIRECTION:
clutter_actor_set_text_direction (actor, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_actor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterActor *actor = CLUTTER_ACTOR (object);
ClutterActorPrivate *priv = actor->priv;
switch (prop_id)
{
case PROP_X:
g_value_set_float (value, clutter_actor_get_x (actor));
break;
case PROP_Y:
g_value_set_float (value, clutter_actor_get_y (actor));
break;
case PROP_WIDTH:
g_value_set_float (value, clutter_actor_get_width (actor));
break;
case PROP_HEIGHT:
g_value_set_float (value, clutter_actor_get_height (actor));
break;
case PROP_FIXED_X:
g_value_set_float (value, priv->fixed_x);
break;
case PROP_FIXED_Y:
g_value_set_float (value, priv->fixed_y);
break;
case PROP_FIXED_POSITION_SET:
g_value_set_boolean (value, priv->position_set);
break;
case PROP_MIN_WIDTH:
g_value_set_float (value, priv->request_min_width);
break;
case PROP_MIN_HEIGHT:
g_value_set_float (value, priv->request_min_height);
break;
case PROP_NATURAL_WIDTH:
g_value_set_float (value, priv->request_natural_width);
break;
case PROP_NATURAL_HEIGHT:
g_value_set_float (value, priv->request_natural_height);
break;
case PROP_MIN_WIDTH_SET:
g_value_set_boolean (value, priv->min_width_set);
break;
case PROP_MIN_HEIGHT_SET:
g_value_set_boolean (value, priv->min_height_set);
break;
case PROP_NATURAL_WIDTH_SET:
g_value_set_boolean (value, priv->natural_width_set);
break;
case PROP_NATURAL_HEIGHT_SET:
g_value_set_boolean (value, priv->natural_height_set);
break;
case PROP_REQUEST_MODE:
g_value_set_enum (value, priv->request_mode);
break;
case PROP_ALLOCATION:
g_value_set_boxed (value, &priv->allocation);
break;
case PROP_DEPTH:
g_value_set_float (value, clutter_actor_get_depth (actor));
break;
case PROP_OPACITY:
g_value_set_uint (value, priv->opacity);
break;
case PROP_NAME:
g_value_set_string (value, priv->name);
break;
case PROP_VISIBLE:
g_value_set_boolean (value, CLUTTER_ACTOR_IS_VISIBLE (actor));
break;
case PROP_MAPPED:
g_value_set_boolean (value, CLUTTER_ACTOR_IS_MAPPED (actor));
break;
case PROP_REALIZED:
g_value_set_boolean (value, CLUTTER_ACTOR_IS_REALIZED (actor));
break;
case PROP_HAS_CLIP:
g_value_set_boolean (value, priv->has_clip);
break;
case PROP_CLIP:
{
ClutterGeometry clip = { 0, };
clip.x = priv->clip[0];
clip.y = priv->clip[1];
clip.width = priv->clip[2];
clip.height = priv->clip[3];
g_value_set_boxed (value, &clip);
}
break;
case PROP_CLIP_TO_ALLOCATION:
g_value_set_boolean (value, priv->clip_to_allocation);
break;
case PROP_SCALE_X:
g_value_set_double (value, priv->scale_x);
break;
case PROP_SCALE_Y:
g_value_set_double (value, priv->scale_y);
break;
case PROP_SCALE_CENTER_X:
{
gfloat center;
clutter_actor_get_scale_center (actor, &center, NULL);
g_value_set_float (value, center);
}
break;
case PROP_SCALE_CENTER_Y:
{
gfloat center;
clutter_actor_get_scale_center (actor, NULL, &center);
g_value_set_float (value, center);
}
break;
case PROP_SCALE_GRAVITY:
g_value_set_enum (value, clutter_actor_get_scale_gravity (actor));
break;
case PROP_REACTIVE:
g_value_set_boolean (value, clutter_actor_get_reactive (actor));
break;
case PROP_ROTATION_ANGLE_X:
g_value_set_double (value, priv->rxang);
break;
case PROP_ROTATION_ANGLE_Y:
g_value_set_double (value, priv->ryang);
break;
case PROP_ROTATION_ANGLE_Z:
g_value_set_double (value, priv->rzang);
break;
case PROP_ROTATION_CENTER_X:
{
ClutterVertex center;
clutter_actor_get_rotation (actor, CLUTTER_X_AXIS,
&center.x,
&center.y,
&center.z);
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Y:
{
ClutterVertex center;
clutter_actor_get_rotation (actor, CLUTTER_Y_AXIS,
&center.x,
&center.y,
&center.z);
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Z:
{
ClutterVertex center;
clutter_actor_get_rotation (actor, CLUTTER_Z_AXIS,
&center.x,
&center.y,
&center.z);
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Z_GRAVITY:
g_value_set_enum (value, clutter_actor_get_z_rotation_gravity (actor));
break;
case PROP_ANCHOR_X:
{
gfloat anchor_x;
clutter_anchor_coord_get_units (actor, &priv->anchor,
&anchor_x,
NULL,
NULL);
g_value_set_float (value, anchor_x);
}
break;
case PROP_ANCHOR_Y:
{
gfloat anchor_y;
clutter_anchor_coord_get_units (actor, &priv->anchor,
NULL,
&anchor_y,
NULL);
g_value_set_float (value, anchor_y);
}
break;
case PROP_ANCHOR_GRAVITY:
g_value_set_enum (value, clutter_actor_get_anchor_point_gravity (actor));
break;
case PROP_SHOW_ON_SET_PARENT:
g_value_set_boolean (value, priv->show_on_set_parent);
break;
case PROP_TEXT_DIRECTION:
g_value_set_enum (value, priv->text_direction);
break;
case PROP_HAS_POINTER:
g_value_set_boolean (value, priv->has_pointer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_actor_dispose (GObject *object)
{
ClutterActor *self = CLUTTER_ACTOR (object);
ClutterActorPrivate *priv = self->priv;
CLUTTER_NOTE (MISC, "Disposing of object (id=%d) of type '%s' (ref_count:%d)",
self->priv->id,
g_type_name (G_OBJECT_TYPE (self)),
object->ref_count);
/* avoid recursing when called from clutter_actor_destroy() */
if (priv->parent_actor != NULL)
{
ClutterActor *parent = priv->parent_actor;
/* go through the Container implementation unless this
* is an internal child and has been marked as such
*/
if (CLUTTER_IS_CONTAINER (parent) &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_INTERNAL_CHILD))
{
clutter_container_remove_actor (CLUTTER_CONTAINER (parent), self);
}
else
clutter_actor_unparent (self);
}
/* parent should be gone */
g_assert (priv->parent_actor == NULL);
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
{
/* can't be mapped or realized with no parent */
g_assert (!CLUTTER_ACTOR_IS_MAPPED (self));
g_assert (!CLUTTER_ACTOR_IS_REALIZED (self));
}
destroy_shader_data (self);
if (priv->pango_context)
{
g_object_unref (priv->pango_context);
priv->pango_context = NULL;
}
g_signal_emit (self, actor_signals[DESTROY], 0);
G_OBJECT_CLASS (clutter_actor_parent_class)->dispose (object);
}
static void
clutter_actor_finalize (GObject *object)
{
ClutterActor *actor = CLUTTER_ACTOR (object);
CLUTTER_NOTE (MISC, "Finalize object (id=%d) of type '%s'",
actor->priv->id,
g_type_name (G_OBJECT_TYPE (actor)));
g_free (actor->priv->name);
clutter_id_pool_remove (CLUTTER_CONTEXT()->id_pool, actor->priv->id);
G_OBJECT_CLASS (clutter_actor_parent_class)->finalize (object);
}
static void
clutter_actor_class_init (ClutterActorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
object_class->set_property = clutter_actor_set_property;
object_class->get_property = clutter_actor_get_property;
object_class->dispose = clutter_actor_dispose;
object_class->finalize = clutter_actor_finalize;
g_type_class_add_private (klass, sizeof (ClutterActorPrivate));
/**
* ClutterActor:x:
*
* X coordinate of the actor in pixels. If written, forces a fixed
* position for the actor. If read, returns the fixed position if any,
* otherwise the allocation if available, otherwise 0.
*/
pspec = g_param_spec_float ("x",
"X coordinate",
"X coordinate of the actor",
-G_MAXFLOAT, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_X, pspec);
/**
* ClutterActor:y:
*
* Y coordinate of the actor in pixels. If written, forces a fixed
* position for the actor. If read, returns the fixed position if
* any, otherwise the allocation if available, otherwise 0.
*/
pspec = g_param_spec_float ("y",
"Y coordinate",
"Y coordinate of the actor",
-G_MAXFLOAT, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_Y, pspec);
/**
* ClutterActor:width:
*
* Width of the actor (in pixels). If written, forces the minimum and
* natural size request of the actor to the given width. If read, returns
* the allocated width if available, otherwise the width request.
*/
pspec = g_param_spec_float ("width",
"Width",
"Width of the actor",
0.0, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_WIDTH, pspec);
/**
* ClutterActor:height:
*
* Height of the actor (in pixels). If written, forces the minimum and
* natural size request of the actor to the given height. If read, returns
* the allocated height if available, otherwise the height request.
*/
pspec = g_param_spec_float ("height",
"Height",
"Height of the actor",
0.0, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_HEIGHT, pspec);
/**
* ClutterActor:fixed-x:
*
* The fixed X position of the actor in pixels.
*
* Writing this property sets #ClutterActor:fixed-position-set
* property as well, as a side effect
*
* Since: 0.8
*/
pspec = g_param_spec_float ("fixed-x",
"Fixed X",
"Forced X position of the actor",
-G_MAXFLOAT, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_FIXED_X, pspec);
/**
* ClutterActor:fixed-y:
*
* The fixed Y position of the actor in pixels.
*
* Writing this property sets the #ClutterActor:fixed-position-set
* property as well, as a side effect
*
* Since: 0.8
*/
pspec = g_param_spec_float ("fixed-y",
"Fixed Y",
"Forced Y position of the actor",
-G_MAXFLOAT, G_MAXFLOAT,
0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_FIXED_Y, pspec);
/**
* ClutterActor:fixed-position-set:
*
* This flag controls whether the #ClutterActor:fixed-x and
* #ClutterActor:fixed-y properties are used
*
* Since: 0.8
*/
pspec = g_param_spec_boolean ("fixed-position-set",
"Fixed position set",
"Whether to use fixed positioning "
"for the actor",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_FIXED_POSITION_SET,
pspec);
/**
* ClutterActor:min-width:
*
* A forced minimum width request for the actor, in pixels
*
* Writing this property sets the #ClutterActor:min-width-set property
* as well, as a side effect.
*
*This property overrides the usual width request of the actor.
*
* Since: 0.8
*/
pspec = g_param_spec_float ("min-width",
"Min Width",
"Forced minimum width request for the actor",
0.0, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_MIN_WIDTH, pspec);
/**
* ClutterActor:min-height:
*
* A forced minimum height request for the actor, in pixels
*
* Writing this property sets the #ClutterActor:min-height-set property
* as well, as a side effect. This property overrides the usual height
* request of the actor.
*
* Since: 0.8
*/
pspec = g_param_spec_float ("min-height",
"Min Height",
"Forced minimum height request for the actor",
0.0, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_MIN_HEIGHT, pspec);
/**
* ClutterActor:natural-width:
*
* A forced natural width request for the actor, in pixels
*
* Writing this property sets the #ClutterActor:natural-width-set
* property as well, as a side effect. This property overrides the
* usual width request of the actor
*
* Since: 0.8
*/
pspec = g_param_spec_float ("natural-width",
"Natural Width",
"Forced natural width request for the actor",
0.0, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_NATURAL_WIDTH, pspec);
/**
* ClutterActor:natural-height:
*
* A forced natural height request for the actor, in pixels
*
* Writing this property sets the #ClutterActor:natural-height-set
* property as well, as a side effect. This property overrides the
* usual height request of the actor
*
* Since: 0.8
*/
pspec = g_param_spec_float ("natural-height",
"Natural Height",
"Forced natural height request for the actor",
0.0, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_NATURAL_HEIGHT, pspec);
/**
* ClutterActor:min-width-set:
*
* This flag controls whether the #ClutterActor:min-width property
* is used
*
* Since: 0.8
*/
pspec = g_param_spec_boolean ("min-width-set",
"Minimum width set",
"Whether to use the min-width property",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_MIN_WIDTH_SET, pspec);
/**
* ClutterActor:min-height-set:
*
* This flag controls whether the #ClutterActor:min-height property
* is used
*
* Since: 0.8
*/
pspec = g_param_spec_boolean ("min-height-set",
"Minimum height set",
"Whether to use the min-height property",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_MIN_HEIGHT_SET, pspec);
/**
* ClutterActor:natural-width-set:
*
* This flag controls whether the #ClutterActor:natural-width property
* is used
*
* Since: 0.8
*/
pspec = g_param_spec_boolean ("natural-width-set",
"Natural width set",
"Whether to use the natural-width property",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_NATURAL_WIDTH_SET,
pspec);
/**
* ClutterActor:natural-height-set:
*
* This flag controls whether the #ClutterActor:natural-height property
* is used
*
* Since: 0.8
*/
pspec = g_param_spec_boolean ("natural-height-set",
"Natural height set",
"Whether to use the natural-height property",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_NATURAL_HEIGHT_SET,
pspec);
/**
* ClutterActor:allocation:
*
* The allocation for the actor, in pixels
*
* This is property is read-only, but you might monitor it to know when an
* actor moves or resizes
*
* Since: 0.8
*/
pspec = g_param_spec_boxed ("allocation",
"Allocation",
"The actor's allocation",
CLUTTER_TYPE_ACTOR_BOX,
CLUTTER_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_ALLOCATION, pspec);
/**
* ClutterActor:request-mode:
*
* Request mode for the #ClutterActor. The request mode determines the
* type of geometry management used by the actor, either height for width
* (the default) or width for height.
*
* For actors implementing height for width, the parent container should get
* the preferred width first, and then the preferred height for that width.
*
* For actors implementing width for height, the parent container should get
* the preferred height first, and then the preferred width for that height.
*
* For instance:
*
* |[
* ClutterRequestMode mode;
* gfloat natural_width, min_width;
* gfloat natural_height, min_height;
*
* mode = clutter_actor_get_request_mode (child);
* if (mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
* {
* clutter_actor_get_preferred_width (child, -1,
* &amp;min_width,
* &amp;natural_width);
* clutter_actor_get_preferred_height (child, natural_width,
* &amp;min_height,
* &amp;natural_height);
* }
* else
* {
* clutter_actor_get_preferred_height (child, -1,
* &amp;min_height,
* &amp;natural_height);
* clutter_actor_get_preferred_width (child, natural_height,
* &amp;min_width,
* &amp;natural_width);
* }
* ]|
*
* will retrieve the minimum and natural width and height depending on the
* preferred request mode of the #ClutterActor "child".
*
* The clutter_actor_get_preferred_size() function will implement this
* check for you.
*
* Since: 0.8
*/
pspec = g_param_spec_enum ("request-mode",
"Request Mode",
"The actor's request mode",
CLUTTER_TYPE_REQUEST_MODE,
CLUTTER_REQUEST_HEIGHT_FOR_WIDTH,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_REQUEST_MODE, pspec);
/**
* ClutterActor:depth:
*
* The position of the actor on the Z axis
*
* Since: 0.6
*/
pspec = g_param_spec_float ("depth",
"Depth",
"Position on the Z axis",
-G_MAXFLOAT, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_DEPTH, pspec);
/**
* ClutterActor:opacity:
*
* Opacity of an actor, between 0 (fully transparent) and
* 255 (fully opaque)
*/
pspec = g_param_spec_uint ("opacity",
"Opacity",
"Opacity of an actor",
0, 255,
255,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_OPACITY, pspec);
/**
* ClutterActor:visible:
*
* Whether the actor is set to be visible or not
*
* See also #ClutterActor:mapped
*/
pspec = g_param_spec_boolean ("visible",
"Visible",
"Whether the actor is visible or not",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_VISIBLE, pspec);
/**
* ClutterActor:mapped:
*
* Whether the actor is mapped (will be painted when the stage
* to which it belongs is mapped)
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("mapped",
"Mapped",
"Whether the actor will be painted",
FALSE,
CLUTTER_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_MAPPED, pspec);
/**
* ClutterActor:realized:
*
* Whether the actor has been realized
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("realized",
"Realized",
"Whether the actor has been realized",
FALSE,
CLUTTER_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_REALIZED, pspec);
/**
* ClutterActor:reactive:
*
* Whether the actor is reactive to events or not
*
* Only reactive actors will emit event-related signals
*
* Since: 0.6
*/
pspec = g_param_spec_boolean ("reactive",
"Reactive",
"Whether the actor is reactive to events",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_REACTIVE, pspec);
/**
* ClutterActor:has-clip:
*
* Whether the actor has the #ClutterActor:clip property set or not
*/
pspec = g_param_spec_boolean ("has-clip",
"Has Clip",
"Whether the actor has a clip set",
FALSE,
CLUTTER_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_HAS_CLIP, pspec);
/**
* ClutterActor:clip:
*
* The clip region for the actor, in actor-relative coordinates
*
* Every part of the actor outside the clip region will not be
* painted
*/
pspec = g_param_spec_boxed ("clip",
"Clip",
"The clip region for the actor",
CLUTTER_TYPE_GEOMETRY,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_CLIP, pspec);
/**
* ClutterActor:name:
*
* The name of the actor
*
* Since: 0.2
*/
pspec = g_param_spec_string ("name",
"Name",
"Name of the actor",
NULL,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_NAME, pspec);
/**
* ClutterActor:scale-x:
*
* The horizontal scale of the actor
*
* Since: 0.6
*/
pspec = g_param_spec_double ("scale-x",
"Scale X",
"Scale factor on the X axis",
0.0, G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_SCALE_X, pspec);
/**
* ClutterActor:scale-y:
*
* The vertical scale of the actor
*
* Since: 0.6
*/
pspec = g_param_spec_double ("scale-y",
"Scale Y",
"Scale factor on the Y axis",
0.0, G_MAXDOUBLE,
1.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_SCALE_Y, pspec);
/**
* ClutterActor:scale-center-x:
*
* The horizontal center point for scaling
*
* Since: 1.0
*/
pspec = g_param_spec_float ("scale-center-x",
"Scale-Center-X",
"Horizontal scale center",
-G_MAXFLOAT, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_SCALE_CENTER_X, pspec);
/**
* ClutterActor:scale-center-y:
*
* The vertical center point for scaling
*
* Since: 1.0
*/
pspec = g_param_spec_float ("scale-center-y",
"Scale-Center-Y",
"Vertical scale center",
-G_MAXFLOAT, G_MAXFLOAT,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_SCALE_CENTER_Y, pspec);
/**
* ClutterActor:scale-gravity:
*
* The center point for scaling expressed as a #ClutterGravity
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("scale-gravity",
"Scale-Gravity",
"The center of scaling",
CLUTTER_TYPE_GRAVITY,
CLUTTER_GRAVITY_NONE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_SCALE_GRAVITY,
pspec);
/**
* ClutterActor:rotation-angle-x:
*
* The rotation angle on the X axis
*
* Since: 0.6
*/
pspec = g_param_spec_double ("rotation-angle-x",
"Rotation Angle X",
"The rotation angle on the X axis",
-G_MAXDOUBLE, G_MAXDOUBLE,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ROTATION_ANGLE_X, pspec);
/**
* ClutterActor:rotation-angle-y:
*
* The rotation angle on the Y axis
*
* Since: 0.6
*/
pspec = g_param_spec_double ("rotation-angle-y",
"Rotation Angle Y",
"The rotation angle on the Y axis",
-G_MAXDOUBLE, G_MAXDOUBLE,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ROTATION_ANGLE_Y, pspec);
/**
* ClutterActor:rotation-angle-z:
*
* The rotation angle on the Z axis
*
* Since: 0.6
*/
pspec = g_param_spec_double ("rotation-angle-z",
"Rotation Angle Z",
"The rotation angle on the Z axis",
-G_MAXDOUBLE, G_MAXDOUBLE,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ROTATION_ANGLE_Z, pspec);
/**
* ClutterActor:rotation-center-x:
*
* The rotation center on the X axis.
*
* Since: 0.6
*/
pspec = g_param_spec_boxed ("rotation-center-x",
"Rotation Center X",
"The rotation center on the X axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_ROTATION_CENTER_X,
pspec);
/**
* ClutterActor:rotation-center-y:
*
* The rotation center on the Y axis.
*
* Since: 0.6
*/
pspec = g_param_spec_boxed ("rotation-center-y",
"Rotation Center Y",
"The rotation center on the Y axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_ROTATION_CENTER_Y,
pspec);
/**
* ClutterActor:rotation-center-z:
*
* The rotation center on the Z axis.
*
* Since: 0.6
*/
pspec = g_param_spec_boxed ("rotation-center-z",
"Rotation Center Z",
"The rotation center on the Z axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_ROTATION_CENTER_Z,
pspec);
/**
* ClutterActor:rotation-center-z-gravity:
*
* The rotation center on the Z axis expressed as a #ClutterGravity.
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("rotation-center-z-gravity",
"Rotation-Center-Z-Gravity",
"Center point for rotation around the Z axis",
CLUTTER_TYPE_GRAVITY,
CLUTTER_GRAVITY_NONE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_ROTATION_CENTER_Z_GRAVITY,
pspec);
/**
* ClutterActor:anchor-x:
*
* The X coordinate of an actor's anchor point, relative to
* the actor coordinate space, in pixels
*
* Since: 0.8
*/
pspec = g_param_spec_float ("anchor-x",
"Anchor X",
"X coordinate of the anchor point",
-G_MAXFLOAT, G_MAXFLOAT,
0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANCHOR_X, pspec);
/**
* ClutterActor:anchor-y:
*
* The Y coordinate of an actor's anchor point, relative to
* the actor coordinate space, in pixels
*
* Since: 0.8
*/
pspec = g_param_spec_float ("anchor-y",
"Anchor Y",
"Y coordinate of the anchor point",
-G_MAXFLOAT, G_MAXFLOAT,
0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANCHOR_Y, pspec);
/**
* ClutterActor:anchor-gravity:
*
* The anchor point expressed as a #ClutterGravity
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("anchor-gravity",
"Anchor-Gravity",
"The anchor point as a ClutterGravity",
CLUTTER_TYPE_GRAVITY,
CLUTTER_GRAVITY_NONE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_ANCHOR_GRAVITY, pspec);
/**
* ClutterActor:show-on-set-parent:
*
* If %TRUE, the actor is automatically shown when parented.
*
* Calling clutter_actor_hide() on an actor which has not been
* parented will set this property to %FALSE as a side effect.
*
* Since: 0.8
*/
pspec = g_param_spec_boolean ("show-on-set-parent",
"Show on set parent",
"Whether the actor is shown when parented",
TRUE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_SHOW_ON_SET_PARENT,
pspec);
/**
* ClutterActor:clip-to-allocation:
*
* Whether the clip region should track the allocated area
* of the actor.
*
* This property is ignored if a clip area has been explicitly
* set using clutter_actor_set_clip().
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("clip-to-allocation",
"Clip to Allocation",
"Sets the clip region to track the "
"actor's allocation",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_CLIP_TO_ALLOCATION,
pspec);
pspec = g_param_spec_enum ("text-direction",
"Text Direction",
"Direction of the text",
CLUTTER_TYPE_TEXT_DIRECTION,
CLUTTER_TEXT_DIRECTION_LTR,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_TEXT_DIRECTION,
pspec);
/**
* ClutterActor:has-pointer:
*
* Whether the actor contains the pointer of a #ClutterInputDevice
* or not.
*
* Since: 1.2
*/
pspec = g_param_spec_boolean ("has-pointer",
"Has Pointer",
"Whether the actor contains the pointer "
"of an input device",
FALSE,
CLUTTER_PARAM_READABLE);
g_object_class_install_property (object_class,
PROP_HAS_POINTER,
pspec);
/**
* ClutterActor::destroy:
* @actor: the object which received the signal
*
* The ::destroy signal is emitted when an actor is destroyed,
* either by direct invocation of clutter_actor_destroy() or
* when the #ClutterGroup that contains the actor is destroyed.
*
* Since: 0.2
*/
actor_signals[DESTROY] =
g_signal_new (I_("destroy"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
G_STRUCT_OFFSET (ClutterActorClass, destroy),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::show:
* @actor: the object which received the signal
*
* The ::show signal is emitted when an actor is visible and
* rendered on the stage.
*
* Since: 0.2
*/
actor_signals[SHOW] =
g_signal_new (I_("show"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterActorClass, show),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::hide:
* @actor: the object which received the signal
*
* The ::hide signal is emitted when an actor is no longer rendered
* on the stage.
*
* Since: 0.2
*/
actor_signals[HIDE] =
g_signal_new (I_("hide"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterActorClass, hide),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::parent-set:
* @actor: the object which received the signal
* @old_parent: the previous parent of the actor, or %NULL
*
* This signal is emitted when the parent of the actor changes.
*
* Since: 0.2
*/
actor_signals[PARENT_SET] =
g_signal_new (I_("parent-set"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, parent_set),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
CLUTTER_TYPE_ACTOR);
/**
* ClutterActor::queue-redraw:
* @actor: the actor we're bubbling the redraw request through
* @origin: the actor which initiated the redraw request
*
* The ::queue_redraw signal is emitted when clutter_actor_queue_redraw()
* is called on @origin.
*
* The default implementation for #ClutterActor chains up to the
* parent actor and queues a redraw on the parent, thus "bubbling"
* the redraw queue up through the actor graph. The default
* implementation for #ClutterStage queues a clutter_redraw() in a
* main loop idle handler.
*
* Note that the @origin actor may be the stage, or a container; it
* does not have to be a leaf node in the actor graph.
*
* Toolkits embedding a #ClutterStage which require a redraw and
* relayout cycle can stop the emission of this signal using the
* GSignal API, redraw the UI and then call clutter_redraw()
* themselves, like:
*
* |[
* static void
* on_redraw_complete (void)
* {
* /&ast; execute the Clutter drawing pipeline &ast;/
* clutter_redraw ();
* }
*
* static void
* on_stage_queue_redraw (ClutterStage *stage)
* {
* /&ast; this prevents the default handler to run &ast;/
* g_signal_stop_emission_by_name (stage, "queue-redraw");
*
* /&ast; queue a redraw with the host toolkit and call
* &ast; a function when the redraw has been completed
* &ast;/
* queue_a_redraw (G_CALLBACK (on_redraw_complete));
* }
* ]|
*
* <note><para>This signal is emitted before the Clutter paint
* pipeline is executed. If you want to know when the pipeline has
* been completed you should connect to the ::paint signal on the
* Stage with g_signal_connect_after().</para></note>
*
* Since: 1.0
*/
actor_signals[QUEUE_REDRAW] =
g_signal_new (I_("queue-redraw"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, queue_redraw),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
CLUTTER_TYPE_ACTOR);
/**
* ClutterActor::queue-relayout
* @actor: the actor being queued for relayout
*
* The ::queue_layout signal is emitted when clutter_actor_queue_relayout()
* is called on an actor.
*
* The default implementation for #ClutterActor chains up to the
* parent actor and queues a relayout on the parent, thus "bubbling"
* the relayout queue up through the actor graph.
*
* The main purpose of this signal is to allow relayout to be propagated
* properly in the procense of #ClutterClone actors. Applications will
* not normally need to connect to this signal.
*
* Since: 1.2
*/
actor_signals[QUEUE_RELAYOUT] =
g_signal_new (I_("queue-relayout"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, queue_relayout),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::event:
* @actor: the actor which received the event
* @event: a #ClutterEvent
*
* The ::event signal is emitted each time an event is received
* by the @actor. This signal will be emitted on every actor,
* following the hierarchy chain, until it reaches the top-level
* container (the #ClutterStage).
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[EVENT] =
g_signal_new (I_("event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::button-press-event:
* @actor: the actor which received the event
* @event: a #ClutterButtonEvent
*
* The ::button-press-event signal is emitted each time a mouse button
* is pressed on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[BUTTON_PRESS_EVENT] =
g_signal_new (I_("button-press-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, button_press_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::button-release-event:
* @actor: the actor which received the event
* @event: a #ClutterButtonEvent
*
* The ::button-release-event signal is emitted each time a mouse button
* is released on @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[BUTTON_RELEASE_EVENT] =
g_signal_new (I_("button-release-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, button_release_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::scroll-event:
* @actor: the actor which received the event
* @event: a #ClutterScrollEvent
*
* The ::scroll-event signal is emitted each time the mouse is
* scrolled on @actor
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[SCROLL_EVENT] =
g_signal_new (I_("scroll-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, scroll_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::key-press-event:
* @actor: the actor which received the event
* @event: a #ClutterKeyEvent
*
* The ::key-press-event signal is emitted each time a keyboard button
* is pressed while @actor has key focus (see clutter_stage_set_key_focus()).
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[KEY_PRESS_EVENT] =
g_signal_new (I_("key-press-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, key_press_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::key-release-event:
* @actor: the actor which received the event
* @event: a #ClutterKeyEvent
*
* The ::key-release-event signal is emitted each time a keyboard button
* is released while @actor has key focus (see
* clutter_stage_set_key_focus()).
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[KEY_RELEASE_EVENT] =
g_signal_new (I_("key-release-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, key_release_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::motion-event:
* @actor: the actor which received the event
* @event: a #ClutterMotionEvent
*
* The ::motion-event signal is emitted each time the mouse pointer is
* moved over @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[MOTION_EVENT] =
g_signal_new (I_("motion-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, motion_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::key-focus-in:
* @actor: the actor which now has key focus
*
* The ::focus-in signal is emitted when @actor recieves key focus.
*
* Since: 0.6
*/
actor_signals[KEY_FOCUS_IN] =
g_signal_new (I_("key-focus-in"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, key_focus_in),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::key-focus-out:
* @actor: the actor which now has key focus
*
* The ::key-focus-out signal is emitted when @actor loses key focus.
*
* Since: 0.6
*/
actor_signals[KEY_FOCUS_OUT] =
g_signal_new (I_("key-focus-out"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, key_focus_out),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::enter-event:
* @actor: the actor which the pointer has entered.
* @event: a #ClutterCrossingEvent
*
* The ::enter-event signal is emitted when the pointer enters the @actor
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[ENTER_EVENT] =
g_signal_new (I_("enter-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, enter_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::leave-event:
* @actor: the actor which the pointer has left
* @event: a #ClutterCrossingEvent
*
* The ::leave-event signal is emitted when the pointer leaves the @actor.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[LEAVE_EVENT] =
g_signal_new (I_("leave-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, leave_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::captured-event:
* @actor: the actor which received the signal
* @event: a #ClutterEvent
*
* The ::captured-event signal is emitted when an event is captured
* by Clutter. This signal will be emitted starting from the top-level
* container (the #ClutterStage) to the actor which received the event
* going down the hierarchy. This signal can be used to intercept every
* event before the specialized events (like
* ClutterActor::button-press-event or ::key-released-event) are
* emitted.
*
* Return value: %TRUE if the event has been handled by the actor,
* or %FALSE to continue the emission.
*
* Since: 0.6
*/
actor_signals[CAPTURED_EVENT] =
g_signal_new (I_("captured-event"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, captured_event),
_clutter_boolean_handled_accumulator, NULL,
clutter_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* ClutterActor::paint:
* @actor: the #ClutterActor that received the signal
*
* The ::paint signal is emitted each time an actor is being painted.
*
* Subclasses of #ClutterActor should override the class signal handler
* and paint themselves in that function.
*
* It is possible to connect a handler to the ::paint signal in order
* to set up some custom aspect of a paint.
*
* Since: 0.8
*/
actor_signals[PAINT] =
g_signal_new (I_("paint"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, paint),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::realize:
* @actor: the #ClutterActor that received the signal
*
* The ::realize signal is emitted each time an actor is being
* realized.
*
* Since: 0.8
*/
actor_signals[REALIZE] =
g_signal_new (I_("realize"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, realize),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::unrealize:
* @actor: the #ClutterActor that received the signal
*
* The ::unrealize signal is emitted each time an actor is being
* unrealized.
*
* Since: 0.8
*/
actor_signals[UNREALIZE] =
g_signal_new (I_("unrealize"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, unrealize),
NULL, NULL,
clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterActor::map:
* @actor: the #ClutterActor to map
*
* The ::map virtual functon must be overridden in order to call
* clutter_actor_map() on any child actors if the actor is not a
* #ClutterContainer. When overriding, it is mandatory to chain up
* to the parent implementation.
*
* Since: 1.0
*/
/**
* ClutterActor::unmap:
* @actor: the #ClutterActor to unmap
*
* The ::unmap virtual functon must be overridden in order to call
* clutter_actor_unmap() on any child actors if the actor is not a
* #ClutterContainer. When overriding, it is mandatory to chain up
* to the parent implementation.
*
* Since: 1.0
*/
/**
* ClutterActor::pick:
* @actor: the #ClutterActor that received the signal
* @color: the #ClutterColor to be used when picking
*
* The ::pick signal is emitted each time an actor is being painted
* in "pick mode". The pick mode is used to identify the actor during
* the event handling phase, or by clutter_stage_get_actor_at_pos().
* The actor should paint its shape using the passed @pick_color.
*
* Subclasses of #ClutterActor should override the class signal handler
* and paint themselves in that function.
*
* It is possible to connect a handler to the ::pick signal in order
* to set up some custom aspect of a paint in pick mode.
*
* Since: 1.0
*/
actor_signals[PICK] =
g_signal_new (I_("pick"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterActorClass, pick),
NULL, NULL,
clutter_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
CLUTTER_TYPE_COLOR);
/**
* ClutterActor::allocation-changed:
* @actor: the #ClutterActor that emitted the signal
* @box: a #ClutterActorBox with the new allocation
* @flags: #ClutterAllocationFlags for the allocation
*
* The ::allocation-changed signal is emitted when the
* #ClutterActor:allocation property changes. Usually, application
* code should just use the notifications for the :allocation property
* but if you want to track the allocation flags as well, for instance
* to know whether the absolute origin of @actor changed, then you might
* want use this signal instead.
*
* Since: 1.0
*/
actor_signals[ALLOCATION_CHANGED] =
g_signal_new (I_("allocation-changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
clutter_marshal_VOID__BOXED_FLAGS,
G_TYPE_NONE, 2,
CLUTTER_TYPE_ACTOR_BOX,
CLUTTER_TYPE_ALLOCATION_FLAGS);
klass->show = clutter_actor_real_show;
klass->show_all = clutter_actor_show;
klass->hide = clutter_actor_real_hide;
klass->hide_all = clutter_actor_hide;
klass->map = clutter_actor_real_map;
klass->unmap = clutter_actor_real_unmap;
klass->unrealize = clutter_actor_real_unrealize;
klass->pick = clutter_actor_real_pick;
klass->get_preferred_width = clutter_actor_real_get_preferred_width;
klass->get_preferred_height = clutter_actor_real_get_preferred_height;
klass->allocate = clutter_actor_real_allocate;
klass->queue_redraw = clutter_actor_real_queue_redraw;
klass->queue_relayout = clutter_actor_real_queue_relayout;
klass->apply_transform = clutter_actor_real_apply_transform;
}
static void
clutter_actor_init (ClutterActor *self)
{
ClutterActorPrivate *priv;
self->priv = priv = CLUTTER_ACTOR_GET_PRIVATE (self);
priv->parent_actor = NULL;
priv->has_clip = FALSE;
priv->opacity = 0xff;
priv->id = clutter_id_pool_add (CLUTTER_CONTEXT()->id_pool, self);
priv->scale_x = 1.0;
priv->scale_y = 1.0;
priv->shader_data = NULL;
priv->show_on_set_parent = TRUE;
priv->needs_width_request = TRUE;
priv->needs_height_request = TRUE;
priv->needs_allocation = TRUE;
priv->cached_width_age = 1;
priv->cached_height_age = 1;
priv->opacity_parent = NULL;
priv->enable_model_view_transform = TRUE;
memset (priv->clip, 0, sizeof (gfloat) * 4);
}
/**
* clutter_actor_destroy:
* @self: a #ClutterActor
*
* Destroys an actor. When an actor is destroyed, it will break any
* references it holds to other objects. If the actor is inside a
* container, the actor will be removed.
*
* When you destroy a container, its children will be destroyed as well.
*
* Note: you cannot destroy the #ClutterStage returned by
* clutter_stage_get_default().
*/
void
clutter_actor_destroy (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_ref (self);
/* avoid recursion while destroying */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION))
{
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_DESTRUCTION);
/* if we are destroying we want to unrealize ourselves
* first before the dispose run removes the parent
*/
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNREALIZED);
g_object_run_dispose (G_OBJECT (self));
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_DESTRUCTION);
}
g_object_unref (self);
}
/**
* clutter_actor_queue_redraw:
* @self: A #ClutterActor
*
* Queues up a redraw of an actor and any children. The redraw occurs
* once the main loop becomes idle (after the current batch of events
* has been processed, roughly).
*
* Applications rarely need to call this, as redraws are handled
* automatically by modification functions.
*
* This function will not do anything if @self is not visible, or
* if the actor is inside an invisible part of the scenegraph.
*
* Also be aware that painting is a NOP for actors with an opacity of
* 0
*/
void
clutter_actor_queue_redraw (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_queue_redraw_with_origin (self, self);
}
static void
_clutter_actor_get_allocation_clip (ClutterActor *self,
ClutterActorBox *clip)
{
ClutterActorBox allocation;
/* XXX: we don't care if we get an out of date allocation here
* because clutter_actor_queue_redraw_with_origin knows to ignore
* the clip if the actor's allocation is invalid.
*
* This is noted because clutter_actor_get_allocation_box does some
* unnecessary work to support buggy code with a comment suggesting
* that it could be changed later which would be good for this use
* case!
*/
clutter_actor_get_allocation_box (self, &allocation);
/* NB: clutter_actor_queue_clipped_redraw expects a box in the
* actor's own coordinate space but the allocation is in parent
* coordinates */
clip->x1 = 0;
clip->y1 = 0;
clip->x2 = allocation.x2 - allocation.x1;
clip->y2 = allocation.y2 - allocation.y1;
}
/*
* clutter_actor_queue_redraw_with_clip:
* @self: A #ClutterActor
* @flags: A mask of #ClutterRedrawFlags controlling the behaviour of
* this queue redraw.
* @clip: A #ClutterActorBox describing the bounds of what needs to be
* redrawn or NULL if you are just using a @flag to state your
* desired clipping.
*
* Queues up a clipped redraw of an actor and any children. The redraw
* occurs once the main loop becomes idle (after the current batch of
* events has been processed, roughly).
*
* If the CLUTTER_REDRAW_CLIPPED_TO_BOX @flag is used, the clip box is
* specified in actor coordinates and tells Clutter that only content
* within this box has been changed so Clutter can optionally optimize
* the redraw.
*
* If you are queuing a clipped redraw it is assumed that the actor is
* flat, and once the clip rectangle is projected into stage
* coordinates it will cover the area of the stage that needs to be
* redrawn. This is not possible to determine for 3D actors since the
* projection of such actors may escape the clip rectangle.
*
* If the CLUTTER_REDRAW_CLIPPED_TO_ALLOCATION @flag is used, @clip
* should be NULL and this tells Clutter to use the actors current
* allocation as a clip box. As above this flag can only be used for
* 2D actors.
*
* Applications rarely need to call this, as redraws are handled
* automatically by modification functions.
*
* This function will not do anything if @self is not visible, or if
* the actor is inside an invisible part of the scenegraph.
*
* Also be aware that painting is a NOP for actors with an opacity of
* 0
*/
void
_clutter_actor_queue_redraw_with_clip (ClutterActor *self,
ClutterRedrawFlags flags,
ClutterActorBox *clip)
{
ClutterActorBox allocation_clip;
/* If the actor doesn't have a valid allocation then we will queue a
* full stage redraw */
if (self->priv->needs_allocation)
{
clutter_actor_queue_redraw (self);
return;
}
/* SYNC_MATRICES is a flag for the stage, which means that we just
* got resized and we need to re-setup the viewport.
* IN_RESIZE is used on X11 where the resize is asynchronous, so we
* don't ask for a viewport change before we have the final size.
*
* If either of these flags are set then we won't be able to
* transform the given clip rectangle into valid stage coordinates,
* so we instead queue a full stage redraw.
*
* (Note: to some extent this is redundant because these flags
* should imply a full stage redraw will be queued, but we at least
* avoid needlessly traversing the actors ancestors to derive an
* incorrect modelview matrix.)
*/
if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_SYNC_MATRICES) &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_STAGE_IN_RESIZE))
{
clutter_actor_queue_redraw (self);
return;
}
if (flags & CLUTTER_REDRAW_CLIPPED_TO_ALLOCATION)
{
_clutter_actor_get_allocation_clip (self, &allocation_clip);
clip = &allocation_clip;
}
/* XXX: Ideally the redraw signal would take a clip rectangle
* argument, but that would be an ABI break. Until we can break the
* ABI we pass the argument out-of-band via an actor->priv member...
*/
_clutter_actor_set_queue_redraw_clip (self, clip);
clutter_actor_queue_redraw_with_origin (self, self);
/* Just in case anyone is manually firing redraw signals without
* using the public queue_redraw() API we are careful to ensure that
* our out-of-band clip member is cleared before returning...
*
* Note: A NULL clip denotes a full-stage, un-clipped redraw
*/
_clutter_actor_set_queue_redraw_clip (self, NULL);
}
/**
* clutter_actor_queue_relayout:
* @self: A #ClutterActor
*
* Indicates that the actor's size request or other layout-affecting
* properties may have changed. This function is used inside #ClutterActor
* subclass implementations, not by applications directly.
*
* Queueing a new layout automatically queues a redraw as well.
*
* Since: 0.8
*/
void
clutter_actor_queue_relayout (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->needs_width_request &&
priv->needs_height_request &&
priv->needs_allocation)
return; /* save some cpu cycles */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) &&
(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_RELAYOUT))
{
g_warning ("The actor '%s' is currently inside an allocation "
"cycle; calling clutter_actor_queue_relayout() is "
"not recommended",
priv->name ? priv->name
: G_OBJECT_TYPE_NAME (self));
}
g_signal_emit (self, actor_signals[QUEUE_RELAYOUT], 0);
}
/**
* clutter_actor_get_preferred_size:
* @self: a #ClutterActor
* @min_width_p: (out) (allow-none): return location for the minimum
* width, or %NULL
* @min_height_p: (out) (allow-none): return location for the minimum
* height, or %NULL
* @natural_width_p: (out) (allow-none): return location for the natural
* width, or %NULL
* @natural_height_p: (out) (allow-none): return location for the natural
* height, or %NULL
*
* Computes the preferred minimum and natural size of an actor, taking into
* account the actor's geometry management (either height-for-width
* or width-for-height).
*
* The width and height used to compute the preferred height and preferred
* width are the actor's natural ones.
*
* If you need to control the height for the preferred width, or the width for
* the preferred height, you should use clutter_actor_get_preferred_width()
* and clutter_actor_get_preferred_height(), and check the actor's preferred
* geometry management using the #ClutterActor:request-mode property.
*
* Since: 0.8
*/
void
clutter_actor_get_preferred_size (ClutterActor *self,
gfloat *min_width_p,
gfloat *min_height_p,
gfloat *natural_width_p,
gfloat *natural_height_p)
{
ClutterActorPrivate *priv;
gfloat min_width, min_height;
gfloat natural_width, natural_height;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
min_width = min_height = 0;
natural_width = natural_height = 0;
if (priv->request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
CLUTTER_NOTE (LAYOUT, "Preferred size (height-for-width)");
clutter_actor_get_preferred_width (self, -1,
&min_width,
&natural_width);
clutter_actor_get_preferred_height (self, natural_width,
&min_height,
&natural_height);
}
else
{
CLUTTER_NOTE (LAYOUT, "Preferred size (width-for-height)");
clutter_actor_get_preferred_height (self, -1,
&min_height,
&natural_height);
clutter_actor_get_preferred_width (self, natural_height,
&min_width,
&natural_width);
}
if (min_width_p)
*min_width_p = min_width;
if (min_height_p)
*min_height_p = min_height;
if (natural_width_p)
*natural_width_p = natural_width;
if (natural_height_p)
*natural_height_p = natural_height;
}
/* looks for a cached size request for this for_size. If not
* found, returns the oldest entry so it can be overwritten */
static gboolean
_clutter_actor_get_cached_size_request (gfloat for_size,
SizeRequest *cached_size_requests,
SizeRequest **result)
{
guint i;
*result = &cached_size_requests[0];
for (i = 0; i < N_CACHED_SIZE_REQUESTS; i++)
{
SizeRequest *sr;
sr = &cached_size_requests[i];
if (sr->age > 0 &&
sr->for_size == for_size)
{
CLUTTER_NOTE (LAYOUT, "Size cache hit for size: %.2f", for_size);
*result = sr;
return TRUE;
}
else if (sr->age < (*result)->age)
{
*result = sr;
}
}
CLUTTER_NOTE (LAYOUT, "Size cache miss for size: %.2f", for_size);
return FALSE;
}
/**
* clutter_actor_get_preferred_width:
* @self: A #ClutterActor
* @for_height: available height when computing the preferred width,
* or a negative value to indicate that no height is defined
* @min_width_p: (out) (allow-none): return location for minimum width,
* or %NULL
* @natural_width_p: (out) (allow-none): return location for the natural
* width, or %NULL
*
* Computes the requested minimum and natural widths for an actor,
* optionally depending on the specified height, or if they are
* already computed, returns the cached values.
*
* An actor may not get its request - depending on the layout
* manager that's in effect.
*
* A request should not incorporate the actor's scale or anchor point;
* those transformations do not affect layout, only rendering.
*
* Since: 0.8
*/
void
clutter_actor_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
ClutterActorClass *klass;
ClutterActorPrivate *priv;
gboolean found_in_cache;
SizeRequest *cached_size_request;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
klass = CLUTTER_ACTOR_GET_CLASS (self);
priv = self->priv;
found_in_cache = FALSE;
cached_size_request = &priv->width_requests[0];
if (!priv->needs_width_request)
found_in_cache = _clutter_actor_get_cached_size_request (for_height,
priv->width_requests,
&cached_size_request);
if (!found_in_cache)
{
gfloat min_width, natural_width;
min_width = natural_width = 0;
CLUTTER_NOTE (LAYOUT, "Width request for %.2f px", for_height);
klass->get_preferred_width (self, for_height,
&min_width,
&natural_width);
/* Due to accumulated float errors, it's better not to warn
* on this, but just fix it.
*/
if (natural_width < min_width)
natural_width = min_width;
cached_size_request->min_size = min_width;
cached_size_request->natural_size = natural_width;
cached_size_request->for_size = for_height;
cached_size_request->age = priv->cached_width_age;
priv->cached_width_age ++;
priv->needs_width_request = FALSE;
}
if (!priv->min_width_set)
priv->request_min_width = cached_size_request->min_size;
if (!priv->natural_width_set)
priv->request_natural_width = cached_size_request->natural_size;
if (min_width_p)
*min_width_p = priv->request_min_width;
if (natural_width_p)
*natural_width_p = priv->request_natural_width;
}
/**
* clutter_actor_get_preferred_height:
* @self: A #ClutterActor
* @for_width: available width to assume in computing desired height,
* or a negative value to indicate that no width is defined
* @min_height_p: (out) (allow-none): return location for minimum height,
* or %NULL
* @natural_height_p: (out) (allow-none): return location for natural
* height, or %NULL
*
* Computes the requested minimum and natural heights for an actor,
* or if they are already computed, returns the cached values.
*
* An actor may not get its request - depending on the layout
* manager that's in effect.
*
* A request should not incorporate the actor's scale or anchor point;
* those transformations do not affect layout, only rendering.
*
* Since: 0.8
*/
void
clutter_actor_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
ClutterActorClass *klass;
ClutterActorPrivate *priv;
gboolean found_in_cache;
SizeRequest *cached_size_request;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
klass = CLUTTER_ACTOR_GET_CLASS (self);
priv = self->priv;
found_in_cache = FALSE;
cached_size_request = &priv->height_requests[0];
if (!priv->needs_height_request)
found_in_cache = _clutter_actor_get_cached_size_request (for_width,
priv->height_requests,
&cached_size_request);
if (!found_in_cache)
{
gfloat min_height, natural_height;
min_height = natural_height = 0;
CLUTTER_NOTE (LAYOUT, "Height request for %.2f px", for_width);
klass->get_preferred_height (self, for_width,
&min_height,
&natural_height);
/* Due to accumulated float errors, it's better not to warn
* on this, but just fix it.
*/
if (natural_height < min_height)
natural_height = min_height;
if (!priv->min_height_set)
{
priv->request_min_height = min_height;
}
if (!priv->natural_height_set)
{
priv->request_natural_height = natural_height;
}
cached_size_request->min_size = min_height;
cached_size_request->natural_size = natural_height;
cached_size_request->for_size = for_width;
cached_size_request->age = priv->cached_height_age;
priv->cached_height_age ++;
priv->needs_height_request = FALSE;
}
if (!priv->min_height_set)
priv->request_min_height = cached_size_request->min_size;
if (!priv->natural_height_set)
priv->request_natural_height = cached_size_request->natural_size;
if (min_height_p)
*min_height_p = priv->request_min_height;
if (natural_height_p)
*natural_height_p = priv->request_natural_height;
}
/**
* clutter_actor_get_allocation_box:
* @self: A #ClutterActor
* @box: (out): the function fills this in with the actor's allocation
*
* Gets the layout box an actor has been assigned. The allocation can
* only be assumed valid inside a paint() method; anywhere else, it
* may be out-of-date.
*
* An allocation does not incorporate the actor's scale or anchor point;
* those transformations do not affect layout, only rendering.
*
* <note>Do not call any of the clutter_actor_get_allocation_*() family
* of functions inside the implementation of the get_preferred_width()
* or get_preferred_height() virtual functions.</note>
*
* Since: 0.8
*/
void
clutter_actor_get_allocation_box (ClutterActor *self,
ClutterActorBox *box)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
/* XXX - if needs_allocation=TRUE, we can either 1) g_return_if_fail,
* which limits calling get_allocation to inside paint() basically; or
* we can 2) force a layout, which could be expensive if someone calls
* get_allocation somewhere silly; or we can 3) just return the latest
* value, allowing it to be out-of-date, and assume people know what
* they are doing.
*
* The least-surprises approach that keeps existing code working is
* likely to be 2). People can end up doing some inefficient things,
* though, and in general code that requires 2) is probably broken.
*/
/* this implements 2) */
if (G_UNLIKELY (self->priv->needs_allocation))
{
ClutterActor *stage = clutter_actor_get_stage (self);
/* do not queue a relayout on an unparented actor */
if (stage)
_clutter_stage_maybe_relayout (stage);
}
/* commenting out the code above and just keeping this assigment
* implements 3)
*/
*box = self->priv->allocation;
}
/**
* clutter_actor_get_allocation_geometry:
* @self: A #ClutterActor
* @geom: (out): allocation geometry in pixels
*
* Gets the layout box an actor has been assigned. The allocation can
* only be assumed valid inside a paint() method; anywhere else, it
* may be out-of-date.
*
* An allocation does not incorporate the actor's scale or anchor point;
* those transformations do not affect layout, only rendering.
*
* The returned rectangle is in pixels.
*
* Since: 0.8
*/
void
clutter_actor_get_allocation_geometry (ClutterActor *self,
ClutterGeometry *geom)
{
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (geom != NULL);
clutter_actor_get_allocation_box (self, &box);
geom->x = clutter_actor_box_get_x (&box);
geom->y = clutter_actor_box_get_y (&box);
geom->width = clutter_actor_box_get_width (&box);
geom->height = clutter_actor_box_get_height (&box);
}
/**
* clutter_actor_allocate:
* @self: A #ClutterActor
* @box: new allocation of the actor, in parent-relative coordinates
* @flags: flags that control the allocation
*
* Called by the parent of an actor to assign the actor its size.
* Should never be called by applications (except when implementing
* a container or layout manager).
*
* Actors can know from their allocation box whether they have moved
* with respect to their parent actor. The @flags parameter describes
* additional information about the allocation, for instance whether
* the parent has moved with respect to the stage, for example because
* a grandparent's origin has moved.
*
* Since: 0.8
*/
void
clutter_actor_allocate (ClutterActor *self,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
ClutterActorPrivate *priv;
ClutterActorClass *klass;
gboolean child_moved;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
child_moved = (box->x1 != priv->allocation.x1 ||
box->y1 != priv->allocation.y1);
/* If we get an allocation "out of the blue"
* (we did not queue relayout), then we want to
* ignore it. But if we have needs_allocation set,
* we want to guarantee that allocate() virtual
* method is always called, i.e. that queue_relayout()
* always results in an allocate() invocation on
* an actor.
*
* The optimization here is to avoid re-allocating
* actors that did not queue relayout and were
* not moved.
*/
if (!priv->needs_allocation &&
!(flags & CLUTTER_ABSOLUTE_ORIGIN_CHANGED) &&
!child_moved &&
box->x2 == priv->allocation.x2 &&
box->y2 == priv->allocation.y2)
{
CLUTTER_NOTE (LAYOUT, "No allocation needed");
return;
}
/* When ABSOLUTE_ORIGIN_CHANGED is passed in to
* clutter_actor_allocate(), it indicates whether the parent has its
* absolute origin moved; when passed in to ClutterActor::allocate()
* virtual method though, it indicates whether the child has its
* absolute origin moved. So we set it when child_moved is TRUE
*/
if (child_moved)
flags |= CLUTTER_ABSOLUTE_ORIGIN_CHANGED;
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_RELAYOUT);
klass = CLUTTER_ACTOR_GET_CLASS (self);
klass->allocate (self, box, flags);
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_RELAYOUT);
}
/**
* clutter_actor_set_geometry:
* @self: A #ClutterActor
* @geometry: A #ClutterGeometry
*
* Sets the actor's fixed position and forces its minimum and natural
* size, in pixels. This means the untransformed actor will have the
* given geometry. This is the same as calling clutter_actor_set_position()
* and clutter_actor_set_size().
*/
void
clutter_actor_set_geometry (ClutterActor *self,
const ClutterGeometry *geometry)
{
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_position (self, geometry->x, geometry->y);
clutter_actor_set_size (self, geometry->width, geometry->height);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_get_geometry:
* @self: A #ClutterActor
* @geometry: (out): A location to store actors #ClutterGeometry
*
* Gets the size and position of an actor relative to its parent
* actor. This is the same as calling clutter_actor_get_position() and
* clutter_actor_get_size(). It tries to "do what you mean" and get the
* requested size and position if the actor's allocation is invalid.
*/
void
clutter_actor_get_geometry (ClutterActor *self,
ClutterGeometry *geometry)
{
gfloat x, y, width, height;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (geometry != NULL);
clutter_actor_get_position (self, &x, &y);
clutter_actor_get_size (self, &width, &height);
geometry->x = (int) x;
geometry->y = (int) y;
geometry->width = (int) width;
geometry->height = (int) height;
}
/**
* clutter_actor_set_position
* @self: A #ClutterActor
* @x: New left position of actor in pixels.
* @y: New top position of actor in pixels.
*
* Sets the actor's fixed position in pixels relative to any parent
* actor.
*
* If a layout manager is in use, this position will override the
* layout manager and force a fixed position.
*/
void
clutter_actor_set_position (ClutterActor *self,
gfloat x,
gfloat y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_x (self, x);
clutter_actor_set_y (self, y);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_get_fixed_position_set:
* @self: A #ClutterActor
*
* Checks whether an actor has a fixed position set (and will thus be
* unaffected by any layout manager).
*
* Return value: %TRUE if the fixed position is set on the actor
*
* Since: 0.8
*/
gboolean
clutter_actor_get_fixed_position_set (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
return self->priv->position_set;
}
/**
* clutter_actor_set_fixed_position_set:
* @self: A #ClutterActor
* @is_set: whether to use fixed position
*
* Sets whether an actor has a fixed position set (and will thus be
* unaffected by any layout manager).
*
* Since: 0.8
*/
void
clutter_actor_set_fixed_position_set (ClutterActor *self,
gboolean is_set)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (self->priv->position_set == (is_set != FALSE))
return;
self->priv->position_set = is_set != FALSE;
g_object_notify (G_OBJECT (self), "fixed-position-set");
clutter_actor_queue_relayout (self);
}
/**
* clutter_actor_move_by:
* @self: A #ClutterActor
* @dx: Distance to move Actor on X axis.
* @dy: Distance to move Actor on Y axis.
*
* Moves an actor by the specified distance relative to its current
* position in pixels.
*
* This function modifies the fixed position of an actor and thus removes
* it from any layout management. Another way to move an actor is with an
* anchor point, see clutter_actor_set_anchor_point().
*
* Since: 0.2
*/
void
clutter_actor_move_by (ClutterActor *self,
gfloat dx,
gfloat dy)
{
ClutterActorPrivate *priv;
gfloat x, y;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
x = priv->fixed_x;
y = priv->fixed_y;
clutter_actor_set_position (self, x + dx, y + dy);
}
static void
clutter_actor_set_min_width (ClutterActor *self,
gfloat min_width)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
/* if we are setting the size on a top-level actor and the
* backend only supports static top-levels (e.g. framebuffers)
* then we ignore the passed value and we override it with
* the stage implementation's preferred size.
*/
if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) &&
clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC))
return;
if (priv->min_width_set && min_width == priv->request_min_width)
return;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_store_old_geometry (self, &old);
priv->request_min_width = min_width;
g_object_notify (G_OBJECT (self), "min-width");
clutter_actor_set_min_width_set (self, TRUE);
clutter_actor_notify_if_geometry_changed (self, &old);
g_object_thaw_notify (G_OBJECT (self));
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_min_height (ClutterActor *self,
gfloat min_height)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
/* if we are setting the size on a top-level actor and the
* backend only supports static top-levels (e.g. framebuffers)
* then we ignore the passed value and we override it with
* the stage implementation's preferred size.
*/
if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) &&
clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC))
return;
if (priv->min_height_set && min_height == priv->request_min_height)
return;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_store_old_geometry (self, &old);
priv->request_min_height = min_height;
g_object_notify (G_OBJECT (self), "min-height");
clutter_actor_set_min_height_set (self, TRUE);
clutter_actor_notify_if_geometry_changed (self, &old);
g_object_thaw_notify (G_OBJECT (self));
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_natural_width (ClutterActor *self,
gfloat natural_width)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
/* if we are setting the size on a top-level actor and the
* backend only supports static top-levels (e.g. framebuffers)
* then we ignore the passed value and we override it with
* the stage implementation's preferred size.
*/
if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) &&
clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC))
return;
if (priv->natural_width_set &&
natural_width == priv->request_natural_width)
return;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_store_old_geometry (self, &old);
priv->request_natural_width = natural_width;
g_object_notify (G_OBJECT (self), "natural-width");
clutter_actor_set_natural_width_set (self, TRUE);
clutter_actor_notify_if_geometry_changed (self, &old);
g_object_thaw_notify (G_OBJECT (self));
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_natural_height (ClutterActor *self,
gfloat natural_height)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
/* if we are setting the size on a top-level actor and the
* backend only supports static top-levels (e.g. framebuffers)
* then we ignore the passed value and we override it with
* the stage implementation's preferred size.
*/
if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) &&
clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC))
return;
if (priv->natural_height_set &&
natural_height == priv->request_natural_height)
return;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_store_old_geometry (self, &old);
priv->request_natural_height = natural_height;
g_object_notify (G_OBJECT (self), "natural-height");
clutter_actor_set_natural_height_set (self, TRUE);
clutter_actor_notify_if_geometry_changed (self, &old);
g_object_thaw_notify (G_OBJECT (self));
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_min_width_set (ClutterActor *self,
gboolean use_min_width)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
if (priv->min_width_set == (use_min_width != FALSE))
return;
clutter_actor_store_old_geometry (self, &old);
priv->min_width_set = use_min_width != FALSE;
g_object_notify (G_OBJECT (self), "min-width-set");
clutter_actor_notify_if_geometry_changed (self, &old);
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_min_height_set (ClutterActor *self,
gboolean use_min_height)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
if (priv->min_height_set == (use_min_height != FALSE))
return;
clutter_actor_store_old_geometry (self, &old);
priv->min_height_set = use_min_height != FALSE;
g_object_notify (G_OBJECT (self), "min-height-set");
clutter_actor_notify_if_geometry_changed (self, &old);
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_natural_width_set (ClutterActor *self,
gboolean use_natural_width)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
if (priv->natural_width_set == (use_natural_width != FALSE))
return;
clutter_actor_store_old_geometry (self, &old);
priv->natural_width_set = use_natural_width != FALSE;
g_object_notify (G_OBJECT (self), "natural-width-set");
clutter_actor_notify_if_geometry_changed (self, &old);
clutter_actor_queue_relayout (self);
}
static void
clutter_actor_set_natural_height_set (ClutterActor *self,
gboolean use_natural_height)
{
ClutterActorPrivate *priv = self->priv;
ClutterActorBox old = { 0, };
if (priv->natural_height_set == (use_natural_height != FALSE))
return;
clutter_actor_store_old_geometry (self, &old);
priv->natural_height_set = use_natural_height != FALSE;
g_object_notify (G_OBJECT (self), "natural-height-set");
clutter_actor_notify_if_geometry_changed (self, &old);
clutter_actor_queue_relayout (self);
}
/**
* clutter_actor_set_request_mode:
* @self: a #ClutterActor
* @mode: the request mode
*
* Sets the geometry request mode of @self.
*
* The @mode determines the order for invoking
* clutter_actor_get_preferred_width() and
* clutter_actor_get_preferred_height()
*
* Since: 1.2
*/
void
clutter_actor_set_request_mode (ClutterActor *self,
ClutterRequestMode mode)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->request_mode == mode)
return;
priv->request_mode = mode;
priv->needs_width_request = TRUE;
priv->needs_height_request = TRUE;
g_object_notify (G_OBJECT (self), "request-mode");
clutter_actor_queue_relayout (self);
}
/**
* clutter_actor_get_request_mode:
* @self: a #ClutterActor
*
* Retrieves the geometry request mode of @self
*
* Return value: the request mode for the actor
*
* Since: 1.2
*/
ClutterRequestMode
clutter_actor_get_request_mode (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self),
CLUTTER_REQUEST_HEIGHT_FOR_WIDTH);
return self->priv->request_mode;
}
/* variant of set_width() without checks and without notification
* freeze+thaw, for internal usage only
*/
static inline void
clutter_actor_set_width_internal (ClutterActor *self,
gfloat width)
{
if (width >= 0)
{
/* the Stage will use the :min-width to control the minimum
* width to be resized to, so we should not be setting it
* along with the :natural-width
*/
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
clutter_actor_set_min_width (self, width);
clutter_actor_set_natural_width (self, width);
}
else
{
/* we only unset the :natural-width for the Stage */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
clutter_actor_set_min_width_set (self, FALSE);
clutter_actor_set_natural_width_set (self, FALSE);
}
}
/* variant of set_height() without checks and without notification
* freeze+thaw, for internal usage only
*/
static inline void
clutter_actor_set_height_internal (ClutterActor *self,
gfloat height)
{
if (height >= 0)
{
/* see the comment above in set_width_internal() */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
clutter_actor_set_min_height (self, height);
clutter_actor_set_natural_height (self, height);
}
else
{
/* see the comment above in set_width_internal() */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL))
clutter_actor_set_min_height_set (self, FALSE);
clutter_actor_set_natural_height_set (self, FALSE);
}
}
/**
* clutter_actor_set_size
* @self: A #ClutterActor
* @width: New width of actor in pixels, or -1
* @height: New height of actor in pixels, or -1
*
* Sets the actor's size request in pixels. This overrides any
* "normal" size request the actor would have. For example
* a text actor might normally request the size of the text;
* this function would force a specific size instead.
*
* If @width and/or @height are -1 the actor will use its
* "normal" size request instead of overriding it, i.e.
* you can "unset" the size with -1.
*
* This function sets or unsets both the minimum and natural size.
*/
void
clutter_actor_set_size (ClutterActor *self,
gfloat width,
gfloat height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_width_internal (self, width);
clutter_actor_set_height_internal (self, height);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_get_size:
* @self: A #ClutterActor
* @width: (out) (allow-none): return location for the width, or %NULL.
* @height: (out) (allow-none): return location for the height, or %NULL.
*
* This function tries to "do what you mean" and return
* the size an actor will have. If the actor has a valid
* allocation, the allocation will be returned; otherwise,
* the actors natural size request will be returned.
*
* If you care whether you get the request vs. the allocation, you
* should probably call a different function like
* clutter_actor_get_allocation_box() or
* clutter_actor_get_preferred_width().
*
* Since: 0.2
*/
void
clutter_actor_get_size (ClutterActor *self,
gfloat *width,
gfloat *height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (width)
*width = clutter_actor_get_width (self);
if (height)
*height = clutter_actor_get_height (self);
}
/**
* clutter_actor_get_position:
* @self: a #ClutterActor
* @x: (out) (allow-none): return location for the X coordinate, or %NULL
* @y: (out) (allow-none): return location for the Y coordinate, or %NULL
*
* This function tries to "do what you mean" and tell you where the
* actor is, prior to any transformations. Retrieves the fixed
* position of an actor in pixels, if one has been set; otherwise, if
* the allocation is valid, returns the actor's allocated position;
* otherwise, returns 0,0.
*
* The returned position is in pixels.
*
* Since: 0.6
*/
void
clutter_actor_get_position (ClutterActor *self,
gfloat *x,
gfloat *y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (x)
*x = clutter_actor_get_x (self);
if (y)
*y = clutter_actor_get_y (self);
}
/**
* clutter_actor_get_transformed_position:
* @self: A #ClutterActor
* @x: (out) (allow-none): return location for the X coordinate, or %NULL
* @y: (out) (allow-none): return location for the Y coordinate, or %NULL
*
* Gets the absolute position of an actor, in pixels relative to the stage.
*
* Since: 0.8
*/
void
clutter_actor_get_transformed_position (ClutterActor *self,
gfloat *x,
gfloat *y)
{
ClutterVertex v1;
ClutterVertex v2;
v1.x = v1.y = v1.z = 0;
clutter_actor_apply_transform_to_point (self, &v1, &v2);
if (x)
*x = v2.x;
if (y)
*y = v2.y;
}
/**
* clutter_actor_get_transformed_size:
* @self: A #ClutterActor
* @width: (out) (allow-none): return location for the width, or %NULL
* @height: (out) (allow-none): return location for the height, or %NULL
*
* Gets the absolute size of an actor in pixels, taking into account the
* scaling factors.
*
* If the actor has a valid allocation, the allocated size will be used.
* If the actor has not a valid allocation then the preferred size will
* be transformed and returned.
*
* If you want the transformed allocation, see
* clutter_actor_get_abs_allocation_vertices() instead.
*
* <note>When the actor (or one of its ancestors) is rotated around the
* X or Y axis, it no longer appears as on the stage as a rectangle, but
* as a generic quadrangle; in that case this function returns the size
* of the smallest rectangle that encapsulates the entire quad. Please
* note that in this case no assumptions can be made about the relative
* position of this envelope to the absolute position of the actor, as
* returned by clutter_actor_get_transformed_position(); if you need this
* information, you need to use clutter_actor_get_abs_allocation_vertices()
* to get the coords of the actual quadrangle.</note>
*
* Since: 0.8
*/
void
clutter_actor_get_transformed_size (ClutterActor *self,
gfloat *width,
gfloat *height)
{
ClutterActorPrivate *priv;
ClutterVertex v[4];
gfloat x_min, x_max, y_min, y_max;
gint i;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
/* if the actor hasn't been allocated yet, get the preferred
* size and transform that
*/
if (priv->needs_allocation)
{
gfloat natural_width, natural_height;
ClutterActorBox box;
/* Make a fake allocation to transform.
*
* NB: _clutter_actor_transform_and_project_box expects a box in
* the actor's coordinate space... */
box.x1 = 0;
box.y1 = 0;
natural_width = natural_height = 0;
clutter_actor_get_preferred_size (self, NULL, NULL,
&natural_width,
&natural_height);
box.x2 = natural_width;
box.y2 = natural_height;
_clutter_actor_transform_and_project_box (self, &box, v);
}
else
clutter_actor_get_abs_allocation_vertices (self, v);
x_min = x_max = v[0].x;
y_min = y_max = v[0].y;
for (i = 1; i < G_N_ELEMENTS (v); ++i)
{
if (v[i].x < x_min)
x_min = v[i].x;
if (v[i].x > x_max)
x_max = v[i].x;
if (v[i].y < y_min)
y_min = v[i].y;
if (v[i].y > y_max)
y_max = v[i].y;
}
if (width)
*width = x_max - x_min;
if (height)
*height = y_max - y_min;
}
/**
* clutter_actor_get_width:
* @self: A #ClutterActor
*
* Retrieves the width of a #ClutterActor.
*
* If the actor has a valid allocation, this function will return the
* width of the allocated area given to the actor.
*
* If the actor does not have a valid allocation, this function will
* return the actor's natural width, that is the preferred width of
* the actor.
*
* If you care whether you get the preferred width or the width that
* has been assigned to the actor, you should probably call a different
* function like clutter_actor_get_allocation_box() to retrieve the
* allocated size or clutter_actor_get_preferred_width() to retrieve the
* preferred width.
*
* If an actor has a fixed width, for instance a width that has been
* assigned using clutter_actor_set_width(), the width returned will
* be the same value.
*
* Return value: the width of the actor, in pixels
*/
gfloat
clutter_actor_get_width (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
priv = self->priv;
if (priv->needs_allocation)
{
gfloat natural_width = 0;
if (self->priv->request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
clutter_actor_get_preferred_width (self, -1, NULL, &natural_width);
else
{
gfloat natural_height = 0;
clutter_actor_get_preferred_height (self, -1, NULL, &natural_height);
clutter_actor_get_preferred_width (self, natural_height,
NULL,
&natural_width);
}
return natural_width;
}
else
return priv->allocation.x2 - priv->allocation.x1;
}
/**
* clutter_actor_get_height:
* @self: A #ClutterActor
*
* Retrieves the height of a #ClutterActor.
*
* If the actor has a valid allocation, this function will return the
* height of the allocated area given to the actor.
*
* If the actor does not have a valid allocation, this function will
* return the actor's natural height, that is the preferred height of
* the actor.
*
* If you care whether you get the preferred height or the height that
* has been assigned to the actor, you should probably call a different
* function like clutter_actor_get_allocation_box() to retrieve the
* allocated size or clutter_actor_get_preferred_height() to retrieve the
* preferred height.
*
* If an actor has a fixed height, for instance a height that has been
* assigned using clutter_actor_set_height(), the height returned will
* be the same value.
*
* Return value: the height of the actor, in pixels
*/
gfloat
clutter_actor_get_height (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
priv = self->priv;
if (priv->needs_allocation)
{
gfloat natural_height = 0;
if (priv->request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
gfloat natural_width = 0;
clutter_actor_get_preferred_width (self, -1, NULL, &natural_width);
clutter_actor_get_preferred_height (self, natural_width,
NULL, &natural_height);
}
else
clutter_actor_get_preferred_height (self, -1, NULL, &natural_height);
return natural_height;
}
else
return priv->allocation.y2 - priv->allocation.y1;
}
/**
* clutter_actor_set_width
* @self: A #ClutterActor
* @width: Requested new width for the actor, in pixels, or -1
*
* Forces a width on an actor, causing the actor's preferred width
* and height (if any) to be ignored.
*
* If @width is -1 the actor will use its preferred width request
* instead of overriding it, i.e. you can "unset" the width with -1.
*
* This function sets both the minimum and natural size of the actor.
*
* since: 0.2
*/
void
clutter_actor_set_width (ClutterActor *self,
gfloat width)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_width_internal (self, width);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_set_height
* @self: A #ClutterActor
* @height: Requested new height for the actor, in pixels, or -1
*
* Forces a height on an actor, causing the actor's preferred width
* and height (if any) to be ignored.
*
* If @height is -1 the actor will use its preferred height instead of
* overriding it, i.e. you can "unset" the height with -1.
*
* This function sets both the minimum and natural size of the actor.
*
* since: 0.2
*/
void
clutter_actor_set_height (ClutterActor *self,
gfloat height)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_height_internal (self, height);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_set_x:
* @self: a #ClutterActor
* @x: the actor's position on the X axis
*
* Sets the actor's X coordinate, relative to its parent, in pixels.
*
* Overrides any layout manager and forces a fixed position for
* the actor.
*
* Since: 0.6
*/
void
clutter_actor_set_x (ClutterActor *self,
gfloat x)
{
ClutterActorBox old = { 0, };
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->position_set && priv->fixed_x == x)
return;
clutter_actor_store_old_geometry (self, &old);
priv->fixed_x = x;
clutter_actor_set_fixed_position_set (self, TRUE);
clutter_actor_notify_if_geometry_changed (self, &old);
clutter_actor_queue_relayout (self);
}
/**
* clutter_actor_set_y:
* @self: a #ClutterActor
* @y: the actor's position on the Y axis
*
* Sets the actor's Y coordinate, relative to its parent, in pixels.#
*
* Overrides any layout manager and forces a fixed position for
* the actor.
*
* Since: 0.6
*/
void
clutter_actor_set_y (ClutterActor *self,
gfloat y)
{
ClutterActorBox old = { 0, };
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->position_set && priv->fixed_y == y)
return;
clutter_actor_store_old_geometry (self, &old);
priv->fixed_y = y;
clutter_actor_set_fixed_position_set (self, TRUE);
clutter_actor_notify_if_geometry_changed (self, &old);
clutter_actor_queue_relayout (self);
}
/**
* clutter_actor_get_x
* @self: A #ClutterActor
*
* Retrieves the X coordinate of a #ClutterActor.
*
* This function tries to "do what you mean", by returning the
* correct value depending on the actor's state.
*
* If the actor has a valid allocation, this function will return
* the X coordinate of the origin of the allocation box.
*
* If the actor has any fixed coordinate set using clutter_actor_set_x(),
* clutter_actor_set_position() or clutter_actor_set_geometry(), this
* function will return that coordinate.
*
* If both the allocation and a fixed position are missing, this function
* will return 0.
*
* Return value: the X coordinate, in pixels, ignoring any
* transformation (i.e. scaling, rotation)
*/
gfloat
clutter_actor_get_x (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
priv = self->priv;
if (priv->needs_allocation)
{
if (priv->position_set)
return priv->fixed_x;
else
return 0;
}
else
return priv->allocation.x1;
}
/**
* clutter_actor_get_y
* @self: A #ClutterActor
*
* Retrieves the Y coordinate of a #ClutterActor.
*
* This function tries to "do what you mean", by returning the
* correct value depending on the actor's state.
*
* If the actor has a valid allocation, this function will return
* the Y coordinate of the origin of the allocation box.
*
* If the actor has any fixed coordinate set using clutter_actor_set_y(),
* clutter_actor_set_position() or clutter_actor_set_geometry(), this
* function will return that coordinate.
*
* If both the allocation and a fixed position are missing, this function
* will return 0.
*
* Return value: the Y coordinate, in pixels, ignoring any
* transformation (i.e. scaling, rotation)
*/
gfloat
clutter_actor_get_y (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
if (self->priv->needs_allocation)
{
if (self->priv->position_set)
return self->priv->fixed_y;
else
return 0;
}
else
return self->priv->allocation.y1;
}
/**
* clutter_actor_set_scale:
* @self: A #ClutterActor
* @scale_x: double factor to scale actor by horizontally.
* @scale_y: double factor to scale actor by vertically.
*
* Scales an actor with the given factors. The scaling is relative to
* the scale center and the anchor point. The scale center is
* unchanged by this function and defaults to 0,0.
*
* Since: 0.2
*/
void
clutter_actor_set_scale (ClutterActor *self,
gdouble scale_x,
gdouble scale_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
priv->scale_x = scale_x;
g_object_notify (G_OBJECT (self), "scale-x");
priv->scale_y = scale_y;
g_object_notify (G_OBJECT (self), "scale-y");
clutter_actor_queue_redraw (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_set_scale_full:
* @self: A #ClutterActor
* @scale_x: double factor to scale actor by horizontally.
* @scale_y: double factor to scale actor by vertically.
* @center_x: X coordinate of the center of the scale.
* @center_y: Y coordinate of the center of the scale
*
* Scales an actor with the given factors around the given center
* point. The center point is specified in pixels relative to the
* anchor point (usually the top left corner of the actor).
*
* Since: 1.0
*/
void
clutter_actor_set_scale_full (ClutterActor *self,
gdouble scale_x,
gdouble scale_y,
gfloat center_x,
gfloat center_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_scale (self, scale_x, scale_y);
if (priv->scale_center.is_fractional)
g_object_notify (G_OBJECT (self), "scale-gravity");
g_object_notify (G_OBJECT (self), "scale-center-x");
g_object_notify (G_OBJECT (self), "scale-center-y");
clutter_anchor_coord_set_units (&priv->scale_center, center_x, center_y, 0);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_set_scale_with_gravity:
* @self: A #ClutterActor
* @scale_x: double factor to scale actor by horizontally.
* @scale_y: double factor to scale actor by vertically.
* @gravity: the location of the scale center expressed as a compass
* direction.
*
* Scales an actor with the given factors around the given
* center point. The center point is specified as one of the compass
* directions in #ClutterGravity. For example, setting it to north
* will cause the top of the actor to remain unchanged and the rest of
* the actor to expand left, right and downwards.
*
* Since: 1.0
*/
void
clutter_actor_set_scale_with_gravity (ClutterActor *self,
gdouble scale_x,
gdouble scale_y,
ClutterGravity gravity)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (gravity == CLUTTER_GRAVITY_NONE)
clutter_actor_set_scale_full (self, scale_x, scale_y, 0, 0);
else
{
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_scale (self, scale_x, scale_y);
g_object_notify (G_OBJECT (self), "scale-gravity");
g_object_notify (G_OBJECT (self), "scale-center-x");
g_object_notify (G_OBJECT (self), "scale-center-y");
clutter_anchor_coord_set_gravity (&priv->scale_center, gravity);
g_object_thaw_notify (G_OBJECT (self));
}
}
/**
* clutter_actor_get_scale:
* @self: A #ClutterActor
* @scale_x: (out) (allow-none): Location to store horizonal
* scale factor, or %NULL.
* @scale_y: (out) (allow-none): Location to store vertical
* scale factor, or %NULL.
*
* Retrieves an actors scale factors.
*
* Since: 0.2
*/
void
clutter_actor_get_scale (ClutterActor *self,
gdouble *scale_x,
gdouble *scale_y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (scale_x)
*scale_x = self->priv->scale_x;
if (scale_y)
*scale_y = self->priv->scale_y;
}
/**
* clutter_actor_get_scale_center:
* @self: A #ClutterActor
* @center_x: (out) (allow-none): Location to store the X position
* of the scale center, or %NULL.
* @center_y: (out) (allow-none): Location to store the Y position
* of the scale center, or %NULL.
*
* Retrieves the scale center coordinate in pixels relative to the top
* left corner of the actor. If the scale center was specified using a
* #ClutterGravity this will calculate the pixel offset using the
* current size of the actor.
*
* Since: 1.0
*/
void
clutter_actor_get_scale_center (ClutterActor *self,
gfloat *center_x,
gfloat *center_y)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_anchor_coord_get_units (self, &self->priv->scale_center,
center_x,
center_y,
NULL);
}
/**
* clutter_actor_get_scale_gravity:
* @self: A #ClutterActor
*
* Retrieves the scale center as a compass direction. If the scale
* center was specified in pixels or units this will return
* %CLUTTER_GRAVITY_NONE.
*
* Return value: the scale gravity
*
* Since: 1.0
*/
ClutterGravity
clutter_actor_get_scale_gravity (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), CLUTTER_GRAVITY_NONE);
return clutter_anchor_coord_get_gravity (&self->priv->scale_center);
}
/**
* clutter_actor_set_opacity:
* @self: A #ClutterActor
* @opacity: New opacity value for the actor.
*
* Sets the actor's opacity, with zero being completely transparent and
* 255 (0xff) being fully opaque.
*/
void
clutter_actor_set_opacity (ClutterActor *self,
guint8 opacity)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->opacity != opacity)
{
priv->opacity = opacity;
clutter_actor_queue_redraw (self);
g_object_notify (G_OBJECT (self), "opacity");
}
}
/*
* clutter_actor_get_paint_opacity_internal:
* @self: a #ClutterActor
*
* Retrieves the absolute opacity of the actor, as it appears on the stage
*
* This function does not do type checks
*
* Return value: the absolute opacity of the actor
*/
static guint8
clutter_actor_get_paint_opacity_internal (ClutterActor *self)
{
ClutterActorPrivate *priv = self->priv;
ClutterActor *parent;
if (priv->opacity_parent != NULL)
return clutter_actor_get_paint_opacity_internal (priv->opacity_parent);
parent = priv->parent_actor;
/* Factor in the actual actors opacity with parents */
if (parent != NULL)
{
guint8 opacity = clutter_actor_get_paint_opacity_internal (parent);
if (opacity != 0xff)
return (opacity * priv->opacity) / 0xff;
}
return priv->opacity;
}
/**
* clutter_actor_get_paint_opacity:
* @self: A #ClutterActor
*
* Retrieves the absolute opacity of the actor, as it appears on the stage.
*
* This function traverses the hierarchy chain and composites the opacity of
* the actor with that of its parents.
*
* This function is intended for subclasses to use in the paint virtual
* function, to paint themselves with the correct opacity.
*
* Return value: The actor opacity value.
*
* Since: 0.8
*/
guint8
clutter_actor_get_paint_opacity (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
return clutter_actor_get_paint_opacity_internal (self);
}
/**
* clutter_actor_get_opacity:
* @self: a #ClutterActor
*
* Retrieves the opacity value of an actor, as set by
* clutter_actor_set_opacity().
*
* For retrieving the absolute opacity of the actor inside a paint
* virtual function, see clutter_actor_get_paint_opacity().
*
* Return value: the opacity of the actor
*/
guint8
clutter_actor_get_opacity (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
return self->priv->opacity;
}
/**
* clutter_actor_set_name:
* @self: A #ClutterActor
* @name: Textual tag to apply to actor
*
* Sets the given name to @self. The name can be used to identify
* a #ClutterActor.
*/
void
clutter_actor_set_name (ClutterActor *self,
const gchar *name)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_free (self->priv->name);
self->priv->name = g_strdup (name);
g_object_notify (G_OBJECT (self), "name");
}
/**
* clutter_actor_get_name:
* @self: A #ClutterActor
*
* Retrieves the name of @self.
*
* Return value: the name of the actor, or %NULL. The returned string is
* owned by the actor and should not be modified or freed.
*/
G_CONST_RETURN gchar *
clutter_actor_get_name (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->name;
}
/**
* clutter_actor_get_gid:
* @self: A #ClutterActor
*
* Retrieves the unique id for @self.
*
* Return value: Globally unique value for this object instance.
*
* Since: 0.6
*/
guint32
clutter_actor_get_gid (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
return self->priv->id;
}
/**
* clutter_actor_set_depth:
* @self: a #ClutterActor
* @depth: Z co-ord
*
* Sets the Z coordinate of @self to @depth.
*
* The unit used by @depth is dependant on the perspective setup. See
* also clutter_stage_set_perspective().
*/
void
clutter_actor_set_depth (ClutterActor *self,
gfloat depth)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->z != depth)
{
/* Sets Z value - XXX 2.0: should we invert? */
priv->z = depth;
if (priv->parent_actor && CLUTTER_IS_CONTAINER (priv->parent_actor))
{
ClutterContainer *parent;
/* We need to resort the container stacking order as to
* correctly render alpha values.
*
* FIXME: This is sub-optimal. maybe queue the the sort
* before stacking
*/
parent = CLUTTER_CONTAINER (priv->parent_actor);
clutter_container_sort_depth_order (parent);
}
clutter_actor_queue_redraw (self);
g_object_notify (G_OBJECT (self), "depth");
}
}
/**
* clutter_actor_get_depth:
* @self: a #ClutterActor
*
* Retrieves the depth of @self.
*
* Return value: the depth of the actor
*/
gfloat
clutter_actor_get_depth (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), -1);
return self->priv->z;
}
/**
* clutter_actor_set_rotation:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @angle: the angle of rotation
* @x: X coordinate of the rotation center
* @y: Y coordinate of the rotation center
* @z: Z coordinate of the rotation center
*
* Sets the rotation angle of @self around the given axis.
*
* The rotation center coordinates used depend on the value of @axis:
* <itemizedlist>
* <listitem><para>%CLUTTER_X_AXIS requires @y and @z</para></listitem>
* <listitem><para>%CLUTTER_Y_AXIS requires @x and @z</para></listitem>
* <listitem><para>%CLUTTER_Z_AXIS requires @x and @y</para></listitem>
* </itemizedlist>
*
* The rotation coordinates are relative to the anchor point of the
* actor, set using clutter_actor_set_anchor_point(). If no anchor
* point is set, the upper left corner is assumed as the origin.
*
* Since: 0.8
*/
void
clutter_actor_set_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle,
gfloat x,
gfloat y,
gfloat z)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_rotation_internal (self, axis, angle);
switch (axis)
{
case CLUTTER_X_AXIS:
clutter_anchor_coord_set_units (&priv->rx_center, x, y, z);
g_object_notify (G_OBJECT (self), "rotation-center-x");
break;
case CLUTTER_Y_AXIS:
clutter_anchor_coord_set_units (&priv->ry_center, x, y, z);
g_object_notify (G_OBJECT (self), "rotation-center-y");
break;
case CLUTTER_Z_AXIS:
if (priv->rz_center.is_fractional)
g_object_notify (G_OBJECT (self), "rotation-center-z-gravity");
clutter_anchor_coord_set_units (&priv->rz_center, x, y, z);
g_object_notify (G_OBJECT (self), "rotation-center-z");
break;
}
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_set_z_rotation_from_gravity:
* @self: a #ClutterActor
* @angle: the angle of rotation
* @gravity: the center point of the rotation
*
* Sets the rotation angle of @self around the Z axis using the center
* point specified as a compass point. For example to rotate such that
* the center of the actor remains static you can use
* %CLUTTER_GRAVITY_CENTER. If the actor changes size the center point
* will move accordingly.
*
* Since: 1.0
*/
void
clutter_actor_set_z_rotation_from_gravity (ClutterActor *self,
gdouble angle,
ClutterGravity gravity)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (gravity == CLUTTER_GRAVITY_NONE)
clutter_actor_set_rotation (self, CLUTTER_Z_AXIS, angle, 0, 0, 0);
else
{
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_rotation_internal (self, CLUTTER_Z_AXIS, angle);
clutter_anchor_coord_set_gravity (&priv->rz_center, gravity);
g_object_notify (G_OBJECT (self), "rotation-center-z-gravity");
g_object_notify (G_OBJECT (self), "rotation-center-z");
g_object_thaw_notify (G_OBJECT (self));
}
}
/**
* clutter_actor_get_rotation:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @x: (out): return value for the X coordinate of the center of rotation
* @y: (out): return value for the Y coordinate of the center of rotation
* @z: (out): return value for the Z coordinate of the center of rotation
*
* Retrieves the angle and center of rotation on the given axis,
* set using clutter_actor_set_rotation().
*
* Return value: the angle of rotation
*
* Since: 0.8
*/
gdouble
clutter_actor_get_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gfloat *x,
gfloat *y,
gfloat *z)
{
ClutterActorPrivate *priv;
gdouble retval = 0;
AnchorCoord *anchor_coord = NULL;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
priv = self->priv;
switch (axis)
{
case CLUTTER_X_AXIS:
anchor_coord = &priv->rx_center;
retval = priv->rxang;
break;
case CLUTTER_Y_AXIS:
anchor_coord = &priv->ry_center;
retval = priv->ryang;
break;
case CLUTTER_Z_AXIS:
anchor_coord = &priv->rz_center;
retval = priv->rzang;
break;
}
clutter_anchor_coord_get_units (self, anchor_coord, x, y, z);
return retval;
}
/**
* clutter_actor_get_z_rotation_gravity:
* @self: A #ClutterActor
*
* Retrieves the center for the rotation around the Z axis as a
* compass direction. If the center was specified in pixels or units
* this will return %CLUTTER_GRAVITY_NONE.
*
* Return value: the Z rotation center
*
* Since: 1.0
*/
ClutterGravity
clutter_actor_get_z_rotation_gravity (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.0);
return clutter_anchor_coord_get_gravity (&self->priv->rz_center);
}
/**
* clutter_actor_set_clip:
* @self: A #ClutterActor
* @xoff: X offset of the clip rectangle
* @yoff: Y offset of the clip rectangle
* @width: Width of the clip rectangle
* @height: Height of the clip rectangle
*
* Sets clip area for @self. The clip area is always computed from the
* upper left corner of the actor, even if the anchor point is set
* otherwise.
*
* Since: 0.6
*/
void
clutter_actor_set_clip (ClutterActor *self,
gfloat xoff,
gfloat yoff,
gfloat width,
gfloat height)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->has_clip &&
priv->clip[0] == xoff &&
priv->clip[1] == yoff &&
priv->clip[2] == width &&
priv->clip[3] == height)
return;
priv->clip[0] = xoff;
priv->clip[1] = yoff;
priv->clip[2] = width;
priv->clip[3] = height;
priv->has_clip = TRUE;
clutter_actor_queue_redraw (self);
g_object_notify (G_OBJECT (self), "has-clip");
g_object_notify (G_OBJECT (self), "clip");
}
/**
* clutter_actor_remove_clip
* @self: A #ClutterActor
*
* Removes clip area from @self.
*/
void
clutter_actor_remove_clip (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (!self->priv->has_clip)
return;
self->priv->has_clip = FALSE;
clutter_actor_queue_redraw (self);
g_object_notify (G_OBJECT (self), "has-clip");
}
/**
* clutter_actor_has_clip:
* @self: a #ClutterActor
*
* Determines whether the actor has a clip area set or not.
*
* Return value: %TRUE if the actor has a clip area set.
*
* Since: 0.1.1
*/
gboolean
clutter_actor_has_clip (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
return self->priv->has_clip;
}
/**
* clutter_actor_get_clip:
* @self: a #ClutterActor
* @xoff: (out) (allow-none): return location for the X offset of
* the clip rectangle, or %NULL
* @yoff: (out) (allow-none): return location for the Y offset of
* the clip rectangle, or %NULL
* @width: (out) (allow-none): return location for the width of
* the clip rectangle, or %NULL
* @height: (out) (allow-none): return location for the height of
* the clip rectangle, or %NULL
*
* Gets the clip area for @self, if any is set
*
* Since: 0.6
*/
void
clutter_actor_get_clip (ClutterActor *self,
gfloat *xoff,
gfloat *yoff,
gfloat *width,
gfloat *height)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (!priv->has_clip)
return;
if (xoff)
*xoff = priv->clip[0];
if (yoff)
*yoff = priv->clip[1];
if (width)
*width = priv->clip[2];
if (height)
*height = priv->clip[3];
}
/**
* clutter_actor_set_parent:
* @self: A #ClutterActor
* @parent: A new #ClutterActor parent
*
* Sets the parent of @self to @parent. The opposite function is
* clutter_actor_unparent().
*
* This function should not be used by applications, but by custom
* container actor subclasses.
*/
void
clutter_actor_set_parent (ClutterActor *self,
ClutterActor *parent)
{
ClutterActorPrivate *priv;
ClutterTextDirection text_dir;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (CLUTTER_IS_ACTOR (parent));
g_return_if_fail (self != parent);
priv = self->priv;
if (priv->parent_actor != NULL)
{
g_warning ("Cannot set a parent on an actor which has a parent.\n"
"You must use clutter_actor_unparent() first.\n");
return;
}
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Cannot set a parent on a toplevel actor\n");
return;
}
if (CLUTTER_PRIVATE_FLAGS (parent) & CLUTTER_ACTOR_IN_DESTRUCTION)
{
g_warning ("Cannot set a parent currently being destroyed");
return;
}
g_object_ref_sink (self);
priv->parent_actor = parent;
/* if push_internal() has been called then we automatically set
* the flag on the actor
*/
if (parent->priv->internal_child)
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_INTERNAL_CHILD);
/* clutter_actor_reparent() will emit ::parent-set for us */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT))
g_signal_emit (self, actor_signals[PARENT_SET], 0, NULL);
/* If parent is mapped or realized, we need to also be mapped or
* realized once we're inside the parent.
*/
clutter_actor_update_map_state (self, MAP_STATE_CHECK);
/* propagate the parent's text direction to the child */
text_dir = clutter_actor_get_text_direction (parent);
clutter_actor_set_text_direction (self, text_dir);
if (priv->show_on_set_parent)
clutter_actor_show (self);
if (CLUTTER_ACTOR_IS_MAPPED (self))
clutter_actor_queue_redraw (self);
/* maintain the invariant that if an actor needs layout,
* its parents do as well
*/
if (priv->needs_width_request ||
priv->needs_height_request ||
priv->needs_allocation)
{
/* we work around the short-circuiting we do
* in clutter_actor_queue_relayout() since we
* want to force a relayout
*/
priv->needs_width_request = TRUE;
priv->needs_height_request = TRUE;
priv->needs_allocation = TRUE;
clutter_actor_queue_relayout (priv->parent_actor);
}
}
/**
* clutter_actor_get_parent:
* @self: A #ClutterActor
*
* Retrieves the parent of @self.
*
* Return Value: (transfer none): The #ClutterActor parent, or %NULL
* if no parent is set
*/
ClutterActor *
clutter_actor_get_parent (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->parent_actor;
}
/**
* clutter_actor_get_paint_visibility:
* @self: A #ClutterActor
*
* Retrieves the 'paint' visibility of an actor recursively checking for non
* visible parents.
*
* This is by definition the same as CLUTTER_ACTOR_IS_MAPPED().
*
* Return Value: TRUE if the actor is visibile and will be painted.
*
* Since: 0.8.4
*/
gboolean
clutter_actor_get_paint_visibility (ClutterActor *actor)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE);
return CLUTTER_ACTOR_IS_MAPPED (actor);
}
/**
* clutter_actor_unparent:
* @self: a #ClutterActor
*
* Removes the parent of @self.
*
* This function should not be used in applications. It should be called by
* implementations of container actors, to dissociate a child from the
* container.
*
* Since: 0.1.1
*/
void
clutter_actor_unparent (ClutterActor *self)
{
ClutterActorPrivate *priv;
ClutterActor *old_parent;
gboolean was_mapped;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->parent_actor == NULL)
return;
was_mapped = CLUTTER_ACTOR_IS_MAPPED (self);
/* we need to unrealize *before* we set parent_actor to NULL,
* because in an unrealize method actors are dissociating from the
* stage, which means they need to be able to
* clutter_actor_get_stage(). This should unmap and unrealize,
* unless we're reparenting.
*/
clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNREALIZED);
old_parent = priv->parent_actor;
priv->parent_actor = NULL;
/* clutter_actor_reparent() will emit ::parent-set for us */
if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT))
g_signal_emit (self, actor_signals[PARENT_SET], 0, old_parent);
/* Queue a redraw on old_parent only if we were painted in the first
* place. Will be no-op if old parent is not shown.
*/
if (was_mapped && !CLUTTER_ACTOR_IS_MAPPED (self))
clutter_actor_queue_redraw (old_parent);
/* remove the reference we acquired in clutter_actor_set_parent() */
g_object_unref (self);
}
/**
* clutter_actor_reparent:
* @self: a #ClutterActor
* @new_parent: the new #ClutterActor parent
*
* This function resets the parent actor of @self. It is
* logically equivalent to calling clutter_actor_unparent()
* and clutter_actor_set_parent(), but more efficiently
* implemented, ensures the child is not finalized
* when unparented, and emits the parent-set signal only
* one time.
*
* Since: 0.2
*/
void
clutter_actor_reparent (ClutterActor *self,
ClutterActor *new_parent)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (CLUTTER_IS_ACTOR (new_parent));
g_return_if_fail (self != new_parent);
if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)
{
g_warning ("Cannot set a parent on a toplevel actor");
return;
}
if (CLUTTER_PRIVATE_FLAGS (new_parent) & CLUTTER_ACTOR_IN_DESTRUCTION)
{
g_warning ("Cannot set a parent currently being destroyed");
return;
}
priv = self->priv;
if (priv->parent_actor != new_parent)
{
ClutterActor *old_parent;
CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_REPARENT);
old_parent = priv->parent_actor;
g_object_ref (self);
/* go through the Container implementation if this is a regular
* child and not an internal one
*/
if (CLUTTER_IS_CONTAINER (priv->parent_actor) &&
!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_INTERNAL_CHILD))
{
ClutterContainer *parent = CLUTTER_CONTAINER (priv->parent_actor);
/* this will have to call unparent() */
clutter_container_remove_actor (parent, self);
}
else
clutter_actor_unparent (self);
/* Note, will call parent() */
if (CLUTTER_IS_CONTAINER (new_parent))
clutter_container_add_actor (CLUTTER_CONTAINER (new_parent), self);
else
clutter_actor_set_parent (self, new_parent);
/* we emit the ::parent-set signal once */
g_signal_emit (self, actor_signals[PARENT_SET], 0, old_parent);
g_object_unref (self);
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_REPARENT);
/* the IN_REPARENT flag suspends state updates */
clutter_actor_update_map_state (self, MAP_STATE_CHECK);
}
}
/**
* clutter_actor_raise:
* @self: A #ClutterActor
* @below: (allow-none): A #ClutterActor to raise above.
*
* Puts @self above @below.
*
* Both actors must have the same parent, and the parent must implement
* the #ClutterContainer interface
*
* This function is the equivalent of clutter_container_raise_child().
*/
void
clutter_actor_raise (ClutterActor *self,
ClutterActor *below)
{
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
parent = clutter_actor_get_parent (self);
if (parent == NULL || !CLUTTER_IS_CONTAINER (parent))
{
g_warning ("%s: Actor '%s' is not inside a container",
G_STRFUNC,
self->priv->name != NULL ? self->priv->name
: G_OBJECT_TYPE_NAME (self));
return;
}
if (below != NULL)
{
if (parent != clutter_actor_get_parent (below))
{
g_warning ("%s Actor '%s' is not in the same container as "
"actor '%s'",
G_STRFUNC,
self->priv->name != NULL ? self->priv->name
: G_OBJECT_TYPE_NAME (self),
below->priv->name != NULL ? below->priv->name
: G_OBJECT_TYPE_NAME (below));
return;
}
}
clutter_container_raise_child (CLUTTER_CONTAINER (parent), self, below);
}
/**
* clutter_actor_lower:
* @self: A #ClutterActor
* @above: (allow-none): A #ClutterActor to lower below
*
* Puts @self below @above.
*
* Both actors must have the same parent, and the parent must implement
* the #ClutterContainer interface.
*
* This function is the equivalent of clutter_container_lower_child().
*/
void
clutter_actor_lower (ClutterActor *self,
ClutterActor *above)
{
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_ACTOR(self));
parent = clutter_actor_get_parent (self);
if (parent == NULL || !CLUTTER_IS_CONTAINER (parent))
{
g_warning ("%s: Actor of type %s is not inside a container",
G_STRFUNC,
self->priv->name != NULL ? self->priv->name
: G_OBJECT_TYPE_NAME (self));
return;
}
if (above)
{
if (parent != clutter_actor_get_parent (above))
{
g_warning ("%s: Actor '%s' is not in the same container as "
"actor '%s'",
G_STRFUNC,
self->priv->name != NULL ? self->priv->name
: G_OBJECT_TYPE_NAME (self),
above->priv->name != NULL ? above->priv->name
: G_OBJECT_TYPE_NAME (above));
return;
}
}
clutter_container_lower_child (CLUTTER_CONTAINER (parent), self, above);
}
/**
* clutter_actor_raise_top:
* @self: A #ClutterActor
*
* Raises @self to the top.
*
* This function calls clutter_actor_raise() internally.
*/
void
clutter_actor_raise_top (ClutterActor *self)
{
clutter_actor_raise (self, NULL);
}
/**
* clutter_actor_lower_bottom:
* @self: A #ClutterActor
*
* Lowers @self to the bottom.
*
* This function calls clutter_actor_lower() internally.
*/
void
clutter_actor_lower_bottom (ClutterActor *self)
{
clutter_actor_lower (self, NULL);
}
/*
* Event handling
*/
/**
* clutter_actor_event:
* @actor: a #ClutterActor
* @event: a #ClutterEvent
* @capture: TRUE if event in in capture phase, FALSE otherwise.
*
* This function is used to emit an event on the main stage.
* You should rarely need to use this function, except for
* synthetising events.
*
* Return value: the return value from the signal emission: %TRUE
* if the actor handled the event, or %FALSE if the event was
* not handled
*
* Since: 0.6
*/
gboolean
clutter_actor_event (ClutterActor *actor,
ClutterEvent *event,
gboolean capture)
{
gboolean retval = FALSE;
gint signal_num = -1;
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
g_object_ref (actor);
if (capture)
{
g_signal_emit (actor, actor_signals[CAPTURED_EVENT], 0,
event,
&retval);
goto out;
}
g_signal_emit (actor, actor_signals[EVENT], 0, event, &retval);
if (!retval)
{
switch (event->type)
{
case CLUTTER_NOTHING:
break;
case CLUTTER_BUTTON_PRESS:
signal_num = BUTTON_PRESS_EVENT;
break;
case CLUTTER_BUTTON_RELEASE:
signal_num = BUTTON_RELEASE_EVENT;
break;
case CLUTTER_SCROLL:
signal_num = SCROLL_EVENT;
break;
case CLUTTER_KEY_PRESS:
signal_num = KEY_PRESS_EVENT;
break;
case CLUTTER_KEY_RELEASE:
signal_num = KEY_RELEASE_EVENT;
break;
case CLUTTER_MOTION:
signal_num = MOTION_EVENT;
break;
case CLUTTER_ENTER:
signal_num = ENTER_EVENT;
break;
case CLUTTER_LEAVE:
signal_num = LEAVE_EVENT;
break;
case CLUTTER_DELETE:
case CLUTTER_DESTROY_NOTIFY:
case CLUTTER_CLIENT_MESSAGE:
default:
signal_num = -1;
break;
}
if (signal_num != -1)
g_signal_emit (actor, actor_signals[signal_num], 0,
event, &retval);
}
out:
g_object_unref (actor);
return retval;
}
/**
* clutter_actor_set_reactive:
* @actor: a #ClutterActor
* @reactive: whether the actor should be reactive to events
*
* Sets @actor as reactive. Reactive actors will receive events.
*
* Since: 0.6
*/
void
clutter_actor_set_reactive (ClutterActor *actor,
gboolean reactive)
{
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
if (reactive == CLUTTER_ACTOR_IS_REACTIVE (actor))
return;
if (reactive)
CLUTTER_ACTOR_SET_FLAGS (actor, CLUTTER_ACTOR_REACTIVE);
else
CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REACTIVE);
g_object_notify (G_OBJECT (actor), "reactive");
}
/**
* clutter_actor_get_reactive:
* @actor: a #ClutterActor
*
* Checks whether @actor is marked as reactive.
*
* Return value: %TRUE if the actor is reactive
*
* Since: 0.6
*/
gboolean
clutter_actor_get_reactive (ClutterActor *actor)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE);
return CLUTTER_ACTOR_IS_REACTIVE (actor) ? TRUE : FALSE;
}
/**
* clutter_actor_get_anchor_point:
* @self: a #ClutterActor
* @anchor_x: (out): return location for the X coordinate of the anchor point
* @anchor_y: (out): return location for the Y coordinate of the anchor point
*
* Gets the current anchor point of the @actor in pixels.
*
* Since: 0.6
*/
void
clutter_actor_get_anchor_point (ClutterActor *self,
gfloat *anchor_x,
gfloat *anchor_y)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
clutter_anchor_coord_get_units (self, &priv->anchor,
anchor_x,
anchor_y,
NULL);
}
/**
* clutter_actor_set_anchor_point:
* @self: a #ClutterActor
* @anchor_x: X coordinate of the anchor point
* @anchor_y: Y coordinate of the anchor point
*
* Sets an anchor point for @self. The anchor point is a point in the
* coordinate space of an actor to which the actor position within its
* parent is relative; the default is (0, 0), i.e. the top-left corner
* of the actor.
*
* Since: 0.6
*/
void
clutter_actor_set_anchor_point (ClutterActor *self,
gfloat anchor_x,
gfloat anchor_y)
{
ClutterActorPrivate *priv;
gboolean changed = FALSE;
gfloat old_anchor_x, old_anchor_y;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_anchor_coord_get_units (self, &priv->anchor,
&old_anchor_x,
&old_anchor_y,
NULL);
if (priv->anchor.is_fractional)
g_object_notify (G_OBJECT (self), "anchor-gravity");
if (old_anchor_x != anchor_x)
{
g_object_notify (G_OBJECT (self), "anchor-x");
changed = TRUE;
}
if (old_anchor_y != anchor_y)
{
g_object_notify (G_OBJECT (self), "anchor-y");
changed = TRUE;
}
clutter_anchor_coord_set_units (&priv->anchor, anchor_x, anchor_y, 0);
if (changed)
clutter_actor_queue_redraw (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_get_anchor_point_gravity:
* @self: a #ClutterActor
*
* Retrieves the anchor position expressed as a #ClutterGravity. If
* the anchor point was specified using pixels or units this will
* return %CLUTTER_GRAVITY_NONE.
*
* Return value: the #ClutterGravity used by the anchor point
*
* Since: 1.0
*/
ClutterGravity
clutter_actor_get_anchor_point_gravity (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), CLUTTER_GRAVITY_NONE);
priv = self->priv;
return clutter_anchor_coord_get_gravity (&priv->anchor);
}
/**
* clutter_actor_move_anchor_point:
* @self: a #ClutterActor
* @anchor_x: X coordinate of the anchor point
* @anchor_y: Y coordinate of the anchor point
*
* Sets an anchor point for the actor, and adjusts the actor postion so that
* the relative position of the actor toward its parent remains the same.
*
* Since: 0.6
*/
void
clutter_actor_move_anchor_point (ClutterActor *self,
gfloat anchor_x,
gfloat anchor_y)
{
ClutterActorPrivate *priv;
gfloat old_anchor_x, old_anchor_y;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
clutter_anchor_coord_get_units (self, &priv->anchor,
&old_anchor_x,
&old_anchor_y,
NULL);
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_anchor_point (self, anchor_x, anchor_y);
if (priv->position_set)
clutter_actor_move_by (self,
anchor_x - old_anchor_x,
anchor_y - old_anchor_y);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_move_anchor_point_from_gravity:
* @self: a #ClutterActor
* @gravity: #ClutterGravity.
*
* Sets an anchor point on the actor based on the given gravity, adjusting the
* actor postion so that its relative position within its parent remains
* unchanged.
*
* Since version 1.0 the anchor point will be stored as a gravity so
* that if the actor changes size then the anchor point will move. For
* example, if you set the anchor point to %CLUTTER_GRAVITY_SOUTH_EAST
* and later double the size of the actor, the anchor point will move
* to the bottom right.
*
* Since: 0.6
*/
void
clutter_actor_move_anchor_point_from_gravity (ClutterActor *self,
ClutterGravity gravity)
{
gfloat old_anchor_x, old_anchor_y, new_anchor_x, new_anchor_y;
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_anchor_coord_get_units (self, &priv->anchor,
&old_anchor_x,
&old_anchor_y,
NULL);
clutter_actor_set_anchor_point_from_gravity (self, gravity);
clutter_anchor_coord_get_units (self, &priv->anchor,
&new_anchor_x,
&new_anchor_y,
NULL);
if (priv->position_set)
clutter_actor_move_by (self,
new_anchor_x - old_anchor_x,
new_anchor_y - old_anchor_y);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_actor_set_anchor_point_from_gravity:
* @self: a #ClutterActor
* @gravity: #ClutterGravity.
*
* Sets an anchor point on the actor, based on the given gravity (this is a
* convenience function wrapping clutter_actor_set_anchor_point()).
*
* Since version 1.0 the anchor point will be stored as a gravity so
* that if the actor changes size then the anchor point will move. For
* example, if you set the anchor point to %CLUTTER_GRAVITY_SOUTH_EAST
* and later double the size of the actor, the anchor point will move
* to the bottom right.
*
* Since: 0.6
*/
void
clutter_actor_set_anchor_point_from_gravity (ClutterActor *self,
ClutterGravity gravity)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (gravity == CLUTTER_GRAVITY_NONE)
clutter_actor_set_anchor_point (self, 0, 0);
else
{
clutter_anchor_coord_set_gravity (&self->priv->anchor, gravity);
g_object_notify (G_OBJECT (self), "anchor-gravity");
g_object_notify (G_OBJECT (self), "anchor-x");
g_object_notify (G_OBJECT (self), "anchor-y");
}
}
typedef enum
{
PARSE_X,
PARSE_Y,
PARSE_WIDTH,
PARSE_HEIGHT,
PARSE_ANCHOR_X,
PARSE_ANCHOR_Y
} ParseDimension;
static gfloat
parse_units (ClutterActor *self,
ParseDimension dimension,
JsonNode *node)
{
GValue value = { 0, };
gfloat retval = 0;
if (JSON_NODE_TYPE (node) != JSON_NODE_VALUE)
return 0;
json_node_get_value (node, &value);
if (G_VALUE_HOLDS (&value, G_TYPE_INT64))
{
retval = (gfloat) g_value_get_int64 (&value);
}
else if (G_VALUE_HOLDS (&value, G_TYPE_DOUBLE))
{
retval = g_value_get_double (&value);
}
else if (G_VALUE_HOLDS (&value, G_TYPE_STRING))
{
ClutterUnits units;
gboolean res;
res = clutter_units_from_string (&units, g_value_get_string (&value));
if (res)
retval = clutter_units_to_pixels (&units);
else
{
g_warning ("Invalid value '%s': integers, strings or floating point "
"values can be used for the x, y, width and height "
"properties. Valid modifiers for strings are 'px', 'mm', "
"'pt' and 'em'.",
g_value_get_string (&value));
retval = 0;
}
}
else
{
g_warning ("Invalid value of type '%s': integers, strings of floating "
"point values can be used for the x, y, width, height "
"anchor-x and anchor-y properties.",
g_type_name (G_VALUE_TYPE (&value)));
}
g_value_unset (&value);
return retval;
}
typedef struct {
ClutterRotateAxis axis;
gdouble angle;
gfloat center_x;
gfloat center_y;
gfloat center_z;
} RotationInfo;
static inline gboolean
parse_rotation_array (ClutterActor *actor,
JsonArray *array,
RotationInfo *info)
{
JsonNode *element;
if (json_array_get_length (array) != 2)
return FALSE;
/* angle */
element = json_array_get_element (array, 0);
if (JSON_NODE_TYPE (element) == JSON_NODE_VALUE)
info->angle = json_node_get_double (element);
else
return FALSE;
/* center */
element = json_array_get_element (array, 1);
if (JSON_NODE_TYPE (element) == JSON_NODE_ARRAY)
{
JsonArray *center = json_node_get_array (element);
if (json_array_get_length (center) != 2)
return FALSE;
switch (info->axis)
{
case CLUTTER_X_AXIS:
info->center_y = parse_units (actor, PARSE_Y,
json_array_get_element (center, 0));
info->center_z = parse_units (actor, PARSE_Y,
json_array_get_element (center, 1));
return TRUE;
case CLUTTER_Y_AXIS:
info->center_x = parse_units (actor, PARSE_X,
json_array_get_element (center, 0));
info->center_z = parse_units (actor, PARSE_X,
json_array_get_element (center, 1));
return TRUE;
case CLUTTER_Z_AXIS:
info->center_x = parse_units (actor, PARSE_X,
json_array_get_element (center, 0));
info->center_y = parse_units (actor, PARSE_Y,
json_array_get_element (center, 1));
return TRUE;
}
}
return FALSE;
}
static gboolean
parse_rotation (ClutterActor *actor,
JsonNode *node,
RotationInfo *info)
{
JsonArray *array;
guint len, i;
gboolean retval = FALSE;
if (JSON_NODE_TYPE (node) != JSON_NODE_ARRAY)
{
g_warning ("Invalid node of type '%s' found, expecting an array",
json_node_type_name (node));
return FALSE;
}
array = json_node_get_array (node);
len = json_array_get_length (array);
for (i = 0; i < len; i++)
{
JsonNode *element = json_array_get_element (array, i);
JsonObject *object;
JsonNode *member;
if (JSON_NODE_TYPE (element) != JSON_NODE_OBJECT)
{
g_warning ("Invalid node of type '%s' found, expecting an object",
json_node_type_name (element));
return FALSE;
}
object = json_node_get_object (element);
if (json_object_has_member (object, "x-axis"))
{
member = json_object_get_member (object, "x-axis");
info->axis = CLUTTER_X_AXIS;
if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE)
{
info->angle = json_node_get_double (member);
retval = TRUE;
}
else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY)
retval = parse_rotation_array (actor,
json_node_get_array (member),
info);
else
retval = FALSE;
}
else if (json_object_has_member (object, "y-axis"))
{
member = json_object_get_member (object, "y-axis");
info->axis = CLUTTER_Y_AXIS;
if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE)
{
info->angle = json_node_get_double (member);
retval = TRUE;
}
else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY)
retval = parse_rotation_array (actor,
json_node_get_array (member),
info);
else
retval = FALSE;
}
else if (json_object_has_member (object, "z-axis"))
{
member = json_object_get_member (object, "z-axis");
info->axis = CLUTTER_Z_AXIS;
if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE)
{
info->angle = json_node_get_double (member);
retval = TRUE;
}
else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY)
retval = parse_rotation_array (actor,
json_node_get_array (member),
info);
else
retval = FALSE;
}
}
return retval;
}
static gboolean
clutter_actor_parse_custom_node (ClutterScriptable *scriptable,
ClutterScript *script,
GValue *value,
const gchar *name,
JsonNode *node)
{
ClutterActor *actor = CLUTTER_ACTOR (scriptable);
gboolean retval = FALSE;
if ((name[0] == 'x' && name[1] == '\0') ||
(name[0] == 'y' && name[1] == '\0') ||
(strcmp (name, "width") == 0) ||
(strcmp (name, "height") == 0) ||
(strcmp (name, "anchor_x") == 0) ||
(strcmp (name, "anchor_y") == 0))
{
ParseDimension dimension;
gfloat units;
if (name[0] == 'x')
dimension = PARSE_X;
else if (name[0] == 'y')
dimension = PARSE_Y;
else if (name[0] == 'w')
dimension = PARSE_WIDTH;
else if (name[0] == 'h')
dimension = PARSE_HEIGHT;
else if (name[0] == 'a' && name[7] == 'x')
dimension = PARSE_ANCHOR_X;
else if (name[0] == 'a' && name[7] == 'y')
dimension = PARSE_ANCHOR_Y;
else
return FALSE;
units = parse_units (actor, dimension, node);
/* convert back to pixels: all properties are pixel-based */
g_value_init (value, G_TYPE_FLOAT);
g_value_set_float (value, units);
retval = TRUE;
}
else if (strcmp (name, "rotation") == 0)
{
RotationInfo *info;
info = g_slice_new0 (RotationInfo);
retval = parse_rotation (actor, node, info);
if (retval)
{
g_value_init (value, G_TYPE_POINTER);
g_value_set_pointer (value, info);
}
else
g_slice_free (RotationInfo, info);
}
return retval;
}
static void
clutter_actor_set_custom_property (ClutterScriptable *scriptable,
ClutterScript *script,
const gchar *name,
const GValue *value)
{
#ifdef CLUTTER_ENABLE_DEBUG
{
gchar *tmp = g_strdup_value_contents (value);
CLUTTER_NOTE (SCRIPT,
"in ClutterActor::set_custom_property('%s') = %s",
name,
tmp);
g_free (tmp);
}
#endif
if (strcmp (name, "rotation") == 0)
{
RotationInfo *info;
if (!G_VALUE_HOLDS (value, G_TYPE_POINTER))
return;
info = g_value_get_pointer (value);
clutter_actor_set_rotation (CLUTTER_ACTOR (scriptable),
info->axis, info->angle,
info->center_x,
info->center_y,
info->center_z);
g_slice_free (RotationInfo, info);
}
else
g_object_set_property (G_OBJECT (scriptable), name, value);
}
static void
clutter_scriptable_iface_init (ClutterScriptableIface *iface)
{
iface->parse_custom_node = clutter_actor_parse_custom_node;
iface->set_custom_property = clutter_actor_set_custom_property;
}
/**
* clutter_actor_transform_stage_point
* @self: A #ClutterActor
* @x: (in): x screen coordinate of the point to unproject
* @y: (in): y screen coordinate of the point to unproject
* @x_out: (out): return location for the unprojected x coordinance
* @y_out: (out): return location for the unprojected y coordinance
*
* This function translates screen coordinates (@x, @y) to
* coordinates relative to the actor. For example, it can be used to translate
* screen events from global screen coordinates into actor-local coordinates.
*
* The conversion can fail, notably if the transform stack results in the
* actor being projected on the screen as a mere line.
*
* The conversion should not be expected to be pixel-perfect due to the
* nature of the operation. In general the error grows when the skewing
* of the actor rectangle on screen increases.
*
* Note: This function is fairly computationally intensive.
*
* Note: This function only works when the allocation is up-to-date,
* i.e. inside of paint()
*
* Return value: %TRUE if conversion was successful.
*
* Since: 0.6
*/
gboolean
clutter_actor_transform_stage_point (ClutterActor *self,
gfloat x,
gfloat y,
gfloat *x_out,
gfloat *y_out)
{
ClutterVertex v[4];
float ST[3][3];
float RQ[3][3];
int du, dv, xi, yi;
float px, py;
float xf, yf, wf, det;
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
priv = self->priv;
/* This implementation is based on the quad -> quad projection algorithm
* described by Paul Heckbert in:
*
* http://www.cs.cmu.edu/~ph/texfund/texfund.pdf
*
* and the sample implementation at:
*
* http://www.cs.cmu.edu/~ph/src/texfund/
*
* Our texture is a rectangle with origin [0, 0], so we are mapping from
* quad to rectangle only, which significantly simplifies things; the
* function calls have been unrolled, and most of the math is done in fixed
* point.
*/
clutter_actor_get_abs_allocation_vertices (self, v);
/* Keeping these as ints simplifies the multiplication (no significant
* loss of precision here).
*/
du = (int) (priv->allocation.x2 - priv->allocation.x1);
dv = (int) (priv->allocation.y2 - priv->allocation.y1);
if (!du || !dv)
return FALSE;
#define UX2FP(x) (x)
#define DET2FP(a,b,c,d) (((a) * (d)) - ((b) * (c)))
/* First, find mapping from unit uv square to xy quadrilateral; this
* equivalent to the pmap_square_quad() functions in the sample
* implementation, which we can simplify, since our target is always
* a rectangle.
*/
px = v[0].x - v[1].x + v[3].x - v[2].x;
py = v[0].y - v[1].y + v[3].y - v[2].y;
if (!px && !py)
{
/* affine transform */
RQ[0][0] = UX2FP (v[1].x - v[0].x);
RQ[1][0] = UX2FP (v[3].x - v[1].x);
RQ[2][0] = UX2FP (v[0].x);
RQ[0][1] = UX2FP (v[1].y - v[0].y);
RQ[1][1] = UX2FP (v[3].y - v[1].y);
RQ[2][1] = UX2FP (v[0].y);
RQ[0][2] = 0;
RQ[1][2] = 0;
RQ[2][2] = 1.0;
}
else
{
/* projective transform */
double dx1, dx2, dy1, dy2, del;
dx1 = UX2FP (v[1].x - v[3].x);
dx2 = UX2FP (v[2].x - v[3].x);
dy1 = UX2FP (v[1].y - v[3].y);
dy2 = UX2FP (v[2].y - v[3].y);
del = DET2FP (dx1, dx2, dy1, dy2);
if (!del)
return FALSE;
/*
* The division here needs to be done in floating point for
* precisions reasons.
*/
RQ[0][2] = (DET2FP (UX2FP (px), dx2, UX2FP (py), dy2) / del);
RQ[1][2] = (DET2FP (dx1, UX2FP (px), dy1, UX2FP (py)) / del);
RQ[1][2] = (DET2FP (dx1, UX2FP (px), dy1, UX2FP (py)) / del);
RQ[2][2] = 1.0;
RQ[0][0] = UX2FP (v[1].x - v[0].x) + (RQ[0][2] * UX2FP (v[1].x));
RQ[1][0] = UX2FP (v[2].x - v[0].x) + (RQ[1][2] * UX2FP (v[2].x));
RQ[2][0] = UX2FP (v[0].x);
RQ[0][1] = UX2FP (v[1].y - v[0].y) + (RQ[0][2] * UX2FP (v[1].y));
RQ[1][1] = UX2FP (v[2].y - v[0].y) + (RQ[1][2] * UX2FP (v[2].y));
RQ[2][1] = UX2FP (v[0].y);
}
/*
* Now combine with transform from our rectangle (u0,v0,u1,v1) to unit
* square. Since our rectangle is based at 0,0 we only need to scale.
*/
RQ[0][0] /= du;
RQ[1][0] /= dv;
RQ[0][1] /= du;
RQ[1][1] /= dv;
RQ[0][2] /= du;
RQ[1][2] /= dv;
/*
* Now RQ is transform from uv rectangle to xy quadrilateral; we need an
* inverse of that.
*/
ST[0][0] = DET2FP (RQ[1][1], RQ[1][2], RQ[2][1], RQ[2][2]);
ST[1][0] = DET2FP (RQ[1][2], RQ[1][0], RQ[2][2], RQ[2][0]);
ST[2][0] = DET2FP (RQ[1][0], RQ[1][1], RQ[2][0], RQ[2][1]);
ST[0][1] = DET2FP (RQ[2][1], RQ[2][2], RQ[0][1], RQ[0][2]);
ST[1][1] = DET2FP (RQ[2][2], RQ[2][0], RQ[0][2], RQ[0][0]);
ST[2][1] = DET2FP (RQ[2][0], RQ[2][1], RQ[0][0], RQ[0][1]);
ST[0][2] = DET2FP (RQ[0][1], RQ[0][2], RQ[1][1], RQ[1][2]);
ST[1][2] = DET2FP (RQ[0][2], RQ[0][0], RQ[1][2], RQ[1][0]);
ST[2][2] = DET2FP (RQ[0][0], RQ[0][1], RQ[1][0], RQ[1][1]);
/*
* Check the resulting matrix is OK.
*/
det = (RQ[0][0] * ST[0][0])
+ (RQ[0][1] * ST[0][1])
+ (RQ[0][2] * ST[0][2]);
if (!det)
return FALSE;
/*
* Now transform our point with the ST matrix; the notional w
* coordinate is 1, hence the last part is simply added.
*/
xi = (int) x;
yi = (int) y;
xf = xi * ST[0][0] + yi * ST[1][0] + ST[2][0];
yf = xi * ST[0][1] + yi * ST[1][1] + ST[2][1];
wf = xi * ST[0][2] + yi * ST[1][2] + ST[2][2];
if (x_out)
*x_out = xf / wf;
if (y_out)
*y_out = yf / wf;
#undef UX2FP
#undef DET2FP
return TRUE;
}
/*
* ClutterGeometry
*/
static ClutterGeometry*
clutter_geometry_copy (const ClutterGeometry *geometry)
{
return g_slice_dup (ClutterGeometry, geometry);
}
static void
clutter_geometry_free (ClutterGeometry *geometry)
{
if (G_LIKELY (geometry != NULL))
g_slice_free (ClutterGeometry, geometry);
}
GType
clutter_geometry_get_type (void)
{
static GType our_type = 0;
if (G_UNLIKELY (our_type == 0))
our_type =
g_boxed_type_register_static (I_("ClutterGeometry"),
(GBoxedCopyFunc) clutter_geometry_copy,
(GBoxedFreeFunc) clutter_geometry_free);
return our_type;
}
/*
* ClutterVertices
*/
/**
* clutter_vertex_new:
* @x: X coordinate
* @y: Y coordinate
* @z: Z coordinate
*
* Creates a new #ClutterVertex for the point in 3D space
* identified by the 3 coordinates @x, @y, @z
*
* Return value: the newly allocate #ClutterVertex. Use
* clutter_vertex_free() to free the resources
*
* Since: 1.0
*/
ClutterVertex *
clutter_vertex_new (gfloat x,
gfloat y,
gfloat z)
{
ClutterVertex *vertex;
vertex = g_slice_new (ClutterVertex);
vertex->x = x;
vertex->y = y;
vertex->z = z;
return vertex;
}
/**
* clutter_vertex_copy:
* @vertex: a #ClutterVertex
*
* Copies @vertex
*
* Return value: a newly allocated copy of #ClutterVertex. Use
* clutter_vertex_free() to free the allocated resources
*
* Since: 1.0
*/
ClutterVertex *
clutter_vertex_copy (const ClutterVertex *vertex)
{
if (G_LIKELY (vertex != NULL))
return g_slice_dup (ClutterVertex, vertex);
return NULL;
}
/**
* clutter_vertex_free:
* @vertex: a #ClutterVertex
*
* Frees a #ClutterVertex allocated using clutter_vertex_copy()
*
* Since: 1.0
*/
void
clutter_vertex_free (ClutterVertex *vertex)
{
if (G_UNLIKELY (vertex != NULL))
g_slice_free (ClutterVertex, vertex);
}
/**
* clutter_vertex_equal:
* @vertex_a: a #ClutterVertex
* @vertex_b: a #ClutterVertex
*
* Compares @vertex_a and @vertex_b for equality
*
* Return value: %TRUE if the passed #ClutterVertex are equal
*
* Since: 1.0
*/
gboolean
clutter_vertex_equal (const ClutterVertex *vertex_a,
const ClutterVertex *vertex_b)
{
g_return_val_if_fail (vertex_a != NULL && vertex_b != NULL, FALSE);
if (vertex_a == vertex_b)
return TRUE;
return vertex_a->x == vertex_b->x &&
vertex_a->y == vertex_b->y &&
vertex_a->z == vertex_b->z;
}
GType
clutter_vertex_get_type (void)
{
static GType our_type = 0;
if (G_UNLIKELY (our_type == 0))
our_type =
g_boxed_type_register_static (I_("ClutterVertex"),
(GBoxedCopyFunc) clutter_vertex_copy,
(GBoxedFreeFunc) clutter_vertex_free);
return our_type;
}
/*
* ClutterActorBox
*/
/**
* clutter_actor_box_new:
* @x_1: X coordinate of the top left point
* @y_1: Y coordinate of the top left point
* @x_2: X coordinate of the bottom right point
* @y_2: Y coordinate of the bottom right point
*
* Allocates a new #ClutterActorBox using the passed coordinates
* for the top left and bottom right points
*
* Return value: the newly allocated #ClutterActorBox. Use
* clutter_actor_box_free() to free the resources
*
* Since: 1.0
*/
ClutterActorBox *
clutter_actor_box_new (gfloat x_1,
gfloat y_1,
gfloat x_2,
gfloat y_2)
{
ClutterActorBox *box;
box = g_slice_new (ClutterActorBox);
box->x1 = x_1;
box->y1 = y_1;
box->x2 = x_2;
box->y2 = y_2;
return box;
}
/**
* clutter_actor_box_copy:
* @box: a #ClutterActorBox
*
* Copies @box
*
* Return value: a newly allocated copy of #ClutterActorBox. Use
* clutter_actor_box_free() to free the allocated resources
*
* Since: 1.0
*/
ClutterActorBox *
clutter_actor_box_copy (const ClutterActorBox *box)
{
if (G_LIKELY (box != NULL))
return g_slice_dup (ClutterActorBox, box);
return NULL;
}
/**
* clutter_actor_box_free:
* @box: a #ClutterActorBox
*
* Frees a #ClutterActorBox allocated using clutter_actor_box_new()
* or clutter_actor_box_copy()
*
* Since: 1.0
*/
void
clutter_actor_box_free (ClutterActorBox *box)
{
if (G_LIKELY (box != NULL))
g_slice_free (ClutterActorBox, box);
}
GType
clutter_actor_box_get_type (void)
{
static GType our_type = 0;
if (G_UNLIKELY (our_type == 0))
our_type =
g_boxed_type_register_static (I_("ClutterActorBox"),
(GBoxedCopyFunc) clutter_actor_box_copy,
(GBoxedFreeFunc) clutter_actor_box_free);
return our_type;
}
/**
* clutter_actor_box_equal:
* @box_a: a #ClutterActorBox
* @box_b: a #ClutterActorBox
*
* Checks @box_a and @box_b for equality
*
* Return value: %TRUE if the passed #ClutterActorBox are equal
*
* Since: 1.0
*/
gboolean
clutter_actor_box_equal (const ClutterActorBox *box_a,
const ClutterActorBox *box_b)
{
g_return_val_if_fail (box_a != NULL && box_b != NULL, FALSE);
if (box_a == box_b)
return TRUE;
return box_a->x1 == box_b->x1 && box_a->y1 == box_b->y1 &&
box_a->x2 == box_b->x2 && box_a->y2 == box_b->y2;
}
/**
* clutter_actor_box_get_x:
* @box: a #ClutterActorBox
*
* Retrieves the X coordinate of the origin of @box
*
* Return value: the X coordinate of the origin
*
* Since: 1.0
*/
gfloat
clutter_actor_box_get_x (const ClutterActorBox *box)
{
g_return_val_if_fail (box != NULL, 0.);
return box->x1;
}
/**
* clutter_actor_box_get_y:
* @box: a #ClutterActorBox
*
* Retrieves the Y coordinate of the origin of @box
*
* Return value: the Y coordinate of the origin
*
* Since: 1.0
*/
gfloat
clutter_actor_box_get_y (const ClutterActorBox *box)
{
g_return_val_if_fail (box != NULL, 0.);
return box->y1;
}
/**
* clutter_actor_box_get_width:
* @box: a #ClutterActorBox
*
* Retrieves the width of the @box
*
* Return value: the width of the box
*
* Since: 1.0
*/
gfloat
clutter_actor_box_get_width (const ClutterActorBox *box)
{
g_return_val_if_fail (box != NULL, 0.);
return box->x2 - box->x1;
}
/**
* clutter_actor_box_get_height:
* @box: a #ClutterActorBox
*
* Retrieves the height of the @box
*
* Return value: the height of the box
*
* Since: 1.0
*/
gfloat
clutter_actor_box_get_height (const ClutterActorBox *box)
{
g_return_val_if_fail (box != NULL, 0.);
return box->y2 - box->y1;
}
/**
* clutter_actor_box_get_origin:
* @box: a #ClutterActorBox
* @x: (out) (allow-none): return location for the X coordinate, or %NULL
* @y: (out) (allow-none): return location for the Y coordinate, or %NULL
*
* Retrieves the origin of @box
*
* Since: 1.0
*/
void
clutter_actor_box_get_origin (const ClutterActorBox *box,
gfloat *x,
gfloat *y)
{
g_return_if_fail (box != NULL);
if (x)
*x = box->x1;
if (y)
*y = box->y1;
}
/**
* clutter_actor_box_get_size:
* @box: a #ClutterActorBox
* @width: (out) (allow-none): return location for the width, or %NULL
* @height: (out) (allow-none): return location for the height, or %NULL
*
* Retrieves the size of @box
*
* Since: 1.0
*/
void
clutter_actor_box_get_size (const ClutterActorBox *box,
gfloat *width,
gfloat *height)
{
g_return_if_fail (box != NULL);
if (width)
*width = box->x2 - box->x1;
if (height)
*height = box->y2 - box->y1;
}
/**
* clutter_actor_box_get_area:
* @box: a #ClutterActorBox
*
* Retrieves the area of @box
*
* Return value: the area of a #ClutterActorBox, in pixels
*
* Since: 1.0
*/
gfloat
clutter_actor_box_get_area (const ClutterActorBox *box)
{
g_return_val_if_fail (box != NULL, 0.);
return (box->x2 - box->x1) * (box->y2 - box->y1);
}
/**
* clutter_actor_box_contains:
* @box: a #ClutterActorBox
* @x: X coordinate of the point
* @y: Y coordinate of the point
*
* Checks whether a point with @x, @y coordinates is contained
* withing @box
*
* Return value: %TRUE if the point is contained by the #ClutterActorBox
*
* Since: 1.0
*/
gboolean
clutter_actor_box_contains (const ClutterActorBox *box,
gfloat x,
gfloat y)
{
g_return_val_if_fail (box != NULL, FALSE);
return (x > box->x1 && x < box->x2) &&
(y > box->y1 && y < box->y2);
}
/**
* clutter_actor_box_from_vertices:
* @box: a #ClutterActorBox
* @verts: (array fixed-size=4): array of four #ClutterVertex
*
* Calculates the bounding box represented by the four vertices; for details
* of the vertex array see clutter_actor_get_abs_allocation_vertices().
*
* Since: 1.0
*/
void
clutter_actor_box_from_vertices (ClutterActorBox *box,
const ClutterVertex verts[])
{
gfloat x_1, x_2, y_1, y_2;
g_return_if_fail (box != NULL);
g_return_if_fail (verts != NULL);
/* 4-way min/max */
x_1 = verts[0].x;
y_1 = verts[0].y;
if (verts[1].x < x_1)
x_1 = verts[1].x;
if (verts[2].x < x_1)
x_1 = verts[2].x;
if (verts[3].x < x_1)
x_1 = verts[3].x;
if (verts[1].y < y_1)
y_1 = verts[1].y;
if (verts[2].y < y_1)
y_1 = verts[2].y;
if (verts[3].y < y_1)
y_1 = verts[3].y;
x_2 = verts[0].x;
y_2 = verts[0].y;
if (verts[1].x > x_2)
x_2 = verts[1].x;
if (verts[2].x > x_2)
x_2 = verts[2].x;
if (verts[3].x > x_2)
x_2 = verts[3].x;
if (verts[1].y > y_2)
y_2 = verts[1].y;
if (verts[2].y > y_2)
y_2 = verts[2].y;
if (verts[3].y > y_2)
y_2 = verts[3].y;
box->x1 = x_1;
box->x2 = x_2;
box->y1 = y_1;
box->y2 = y_2;
}
/**
* clutter_actor_box_interpolate:
* @initial: the initial #ClutterActorBox
* @final: the final #ClutterActorBox
* @progress: the interpolation progress
* @result: (out): return location for the interpolation
*
* Interpolates between @initial and @final #ClutterActorBox<!-- -->es
* using @progress
*
* Since: 1.2
*/
void
clutter_actor_box_interpolate (const ClutterActorBox *initial,
const ClutterActorBox *final,
gdouble progress,
ClutterActorBox *result)
{
g_return_if_fail (initial != NULL);
g_return_if_fail (final != NULL);
g_return_if_fail (result != NULL);
result->x1 = initial->x1 + (final->x1 - initial->x1) * progress;
result->y1 = initial->y1 + (final->y1 - initial->y1) * progress;
result->x2 = initial->x2 + (final->x2 - initial->x2) * progress;
result->y2 = initial->y2 + (final->y2 - initial->y2) * progress;
}
/**
* clutter_actor_box_clamp_to_pixel:
* @box: (inout): the #ClutterActorBox to clamp
*
* Clamps the components of @box to the nearest integer
*
* Since: 1.2
*/
void
clutter_actor_box_clamp_to_pixel (ClutterActorBox *box)
{
g_return_if_fail (box != NULL);
box->x1 = floorf (box->x1 + 0.5);
box->y1 = floorf (box->y1 + 0.5);
box->x2 = floorf (box->x2 + 0.5);
box->y2 = floorf (box->y2 + 0.5);
}
/******************************************************************************/
struct _ShaderData
{
ClutterShader *shader;
/* list of values that should be set on the shader
* before each paint cycle
*/
GHashTable *value_hash;
};
static void
shader_value_free (gpointer data)
{
GValue *var = data;
g_value_unset (var);
g_slice_free (GValue, var);
}
static void
destroy_shader_data (ClutterActor *self)
{
ClutterActorPrivate *actor_priv = self->priv;
ShaderData *shader_data = actor_priv->shader_data;
if (shader_data == NULL)
return;
if (shader_data->shader)
{
g_object_unref (shader_data->shader);
shader_data->shader = NULL;
}
if (shader_data->value_hash)
{
g_hash_table_destroy (shader_data->value_hash);
shader_data->value_hash = NULL;
}
g_slice_free (ShaderData, shader_data);
actor_priv->shader_data = NULL;
}
/**
* clutter_actor_get_shader:
* @self: a #ClutterActor
*
* Queries the currently set #ClutterShader on @self.
*
* Return value: (transfer none): The currently set #ClutterShader
* or %NULL if no shader is set.
*
* Since: 0.6
*/
ClutterShader *
clutter_actor_get_shader (ClutterActor *self)
{
ClutterActorPrivate *actor_priv;
ShaderData *shader_data;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
actor_priv = self->priv;
shader_data = actor_priv->shader_data;
if (shader_data == NULL)
return NULL;
return shader_data->shader;
}
/**
* clutter_actor_set_shader:
* @self: a #ClutterActor
* @shader: (allow-none): a #ClutterShader or %NULL to unset the shader.
*
* Sets the #ClutterShader to be used when rendering @self.
*
* If @shader is %NULL it will unset any currently set shader
* for the actor.
*
* Return value: %TRUE if the shader was successfully applied
*
* Since: 0.6
*/
gboolean
clutter_actor_set_shader (ClutterActor *self,
ClutterShader *shader)
{
ClutterActorPrivate *actor_priv;
ShaderData *shader_data;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
g_return_val_if_fail (shader == NULL || CLUTTER_IS_SHADER (shader), FALSE);
if (shader != NULL)
g_object_ref (shader);
else
{
/* if shader passed in is NULL we destroy the shader */
destroy_shader_data (self);
return TRUE;
}
actor_priv = self->priv;
shader_data = actor_priv->shader_data;
if (shader_data == NULL)
{
actor_priv->shader_data = shader_data = g_slice_new (ShaderData);
shader_data->shader = NULL;
shader_data->value_hash =
g_hash_table_new_full (g_str_hash, g_str_equal,
g_free,
shader_value_free);
}
if (shader_data->shader != NULL)
g_object_unref (shader_data->shader);
shader_data->shader = shader;
clutter_actor_queue_redraw (self);
return TRUE;
}
static void
set_each_param (gpointer key,
gpointer value,
gpointer user_data)
{
ClutterShader *shader = user_data;
GValue *var = value;
clutter_shader_set_uniform (shader, (const gchar *)key, var);
}
static void
clutter_actor_shader_pre_paint (ClutterActor *actor,
gboolean repeat)
{
ClutterActorPrivate *priv;
ShaderData *shader_data;
ClutterShader *shader;
ClutterMainContext *context;
priv = actor->priv;
shader_data = priv->shader_data;
if (!shader_data)
return;
context = _clutter_context_get_default ();
shader = shader_data->shader;
if (shader)
{
clutter_shader_set_is_enabled (shader, TRUE);
g_hash_table_foreach (shader_data->value_hash, set_each_param, shader);
if (!repeat)
context->shaders = g_slist_prepend (context->shaders, actor);
}
}
static void
clutter_actor_shader_post_paint (ClutterActor *actor)
{
ClutterActorPrivate *priv;
ShaderData *shader_data;
ClutterShader *shader;
ClutterMainContext *context;
priv = actor->priv;
shader_data = priv->shader_data;
if (!shader_data)
return;
context = _clutter_context_get_default ();
shader = shader_data->shader;
if (shader)
{
clutter_shader_set_is_enabled (shader, FALSE);
context->shaders = g_slist_remove (context->shaders, actor);
if (context->shaders)
{
/* call pre-paint again, this time with the second argument being
* TRUE, indicating that we are reapplying the shader and thus
* should not be prepended to the stack
*/
clutter_actor_shader_pre_paint (context->shaders->data, TRUE);
}
}
}
/**
* clutter_actor_set_shader_param:
* @self: a #ClutterActor
* @param: the name of the parameter
* @value: the value of the parameter
*
* Sets the value for a named parameter of the shader applied
* to @actor.
*
* Since: 1.0
*/
void
clutter_actor_set_shader_param (ClutterActor *self,
const gchar *param,
const GValue *value)
{
ClutterActorPrivate *priv;
ShaderData *shader_data;
GValue *var;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (param != NULL);
g_return_if_fail (CLUTTER_VALUE_HOLDS_SHADER_FLOAT (value) ||
CLUTTER_VALUE_HOLDS_SHADER_INT (value) ||
CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value) ||
G_VALUE_HOLDS_FLOAT (value) ||
G_VALUE_HOLDS_INT (value));
priv = self->priv;
shader_data = priv->shader_data;
if (!shader_data)
return;
var = g_slice_new0 (GValue);
g_value_init (var, G_VALUE_TYPE (value));
g_value_copy (value, var);
g_hash_table_insert (shader_data->value_hash, g_strdup (param), var);
clutter_actor_queue_redraw (self);
}
/**
* clutter_actor_set_shader_param_float:
* @self: a #ClutterActor
* @param: the name of the parameter
* @value: the value of the parameter
*
* Sets the value for a named float parameter of the shader applied
* to @actor.
*
* Since: 0.8
*/
void
clutter_actor_set_shader_param_float (ClutterActor *self,
const gchar *param,
gfloat value)
{
GValue var = { 0, };
g_value_init (&var, G_TYPE_FLOAT);
g_value_set_float (&var, value);
clutter_actor_set_shader_param (self, param, &var);
g_value_unset (&var);
}
/**
* clutter_actor_set_shader_param_int:
* @self: a #ClutterActor
* @param: the name of the parameter
* @value: the value of the parameter
*
* Sets the value for a named int parameter of the shader applied to
* @actor.
*
* Since: 0.8
*/
void
clutter_actor_set_shader_param_int (ClutterActor *self,
const gchar *param,
gint value)
{
GValue var = { 0, };
g_value_init (&var, G_TYPE_INT);
g_value_set_int (&var, value);
clutter_actor_set_shader_param (self, param, &var);
g_value_unset (&var);
}
/**
* clutter_actor_is_rotated:
* @self: a #ClutterActor
*
* Checks whether any rotation is applied to the actor.
*
* Return value: %TRUE if the actor is rotated.
*
* Since: 0.6
*/
gboolean
clutter_actor_is_rotated (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
priv = self->priv;
if (priv->rxang || priv->ryang || priv->rzang)
return TRUE;
return FALSE;
}
/**
* clutter_actor_is_scaled:
* @self: a #ClutterActor
*
* Checks whether the actor is scaled in either dimension.
*
* Return value: %TRUE if the actor is scaled.
*
* Since: 0.6
*/
gboolean
clutter_actor_is_scaled (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
priv = self->priv;
if (priv->scale_x != 1.0 || priv->scale_y != 1.0)
return TRUE;
return FALSE;
}
/**
* clutter_actor_get_stage:
* @actor: a #ClutterActor
*
* Retrieves the #ClutterStage where @actor is contained.
*
* Return value: (transfer none): the stage containing the actor, or %NULL
*
* Since: 0.8
*/
ClutterActor *
clutter_actor_get_stage (ClutterActor *actor)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
while (actor && !(CLUTTER_PRIVATE_FLAGS (actor) & CLUTTER_ACTOR_IS_TOPLEVEL))
actor = clutter_actor_get_parent (actor);
return actor;
}
/**
* clutter_actor_allocate_available_size:
* @self: a #ClutterActor
* @x: the actor's X coordinate
* @y: the actor's Y coordinate
* @available_width: the maximum available width, or -1 to use the
* actor's natural width
* @available_height: the maximum available height, or -1 to use the
* actor's natural height
* @flags: flags controlling the allocation
*
* Allocates @self taking into account the #ClutterActor<!-- -->'s
* preferred size, but limiting it to the maximum available width
* and height provided.
*
* This function will do the right thing when dealing with the
* actor's request mode.
*
* The implementation of this function is equivalent to:
*
* |[
* if (request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
* {
* clutter_actor_get_preferred_width (self, available_height,
* &amp;min_width,
* &amp;natural_width);
* width = CLAMP (natural_width, min_width, available_width);
*
* clutter_actor_get_preferred_height (self, width,
* &amp;min_height,
* &amp;natural_height);
* height = CLAMP (natural_height, min_height, available_height);
* }
* else
* {
* clutter_actor_get_preferred_height (self, available_width,
* &amp;min_height,
* &amp;natural_height);
* height = CLAMP (natural_height, min_height, available_height);
*
* clutter_actor_get_preferred_width (self, height,
* &amp;min_width,
* &amp;natural_width);
* width = CLAMP (natural_width, min_width, available_width);
* }
*
* box.x1 = x; box.y1 = y;
* box.x2 = box.x1 + available_width;
* box.y2 = box.y1 + available_height;
* clutter_actor_allocate (self, &amp;box, flags);
* ]|
*
* This function can be used by fluid layout managers to allocate
* an actor's preferred size without making it bigger than the area
* available for the container.
*
* Since: 1.0
*/
void
clutter_actor_allocate_available_size (ClutterActor *self,
gfloat x,
gfloat y,
gfloat available_width,
gfloat available_height,
ClutterAllocationFlags flags)
{
ClutterActorPrivate *priv;
gfloat width, height;
gfloat min_width, min_height;
gfloat natural_width, natural_height;
ClutterActorBox box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
width = height = 0.0;
switch (priv->request_mode)
{
case CLUTTER_REQUEST_HEIGHT_FOR_WIDTH:
clutter_actor_get_preferred_width (self, available_height,
&min_width,
&natural_width);
width = CLAMP (natural_width, min_width, available_width);
clutter_actor_get_preferred_height (self, width,
&min_height,
&natural_height);
height = CLAMP (natural_height, min_height, available_height);
break;
case CLUTTER_REQUEST_WIDTH_FOR_HEIGHT:
clutter_actor_get_preferred_height (self, available_width,
&min_height,
&natural_height);
height = CLAMP (natural_height, min_height, available_height);
clutter_actor_get_preferred_width (self, height,
&min_width,
&natural_width);
width = CLAMP (natural_width, min_width, available_width);
break;
}
box.x1 = x;
box.y1 = y;
box.x2 = box.x1 + width;
box.y2 = box.y1 + height;
clutter_actor_allocate (self, &box, flags);
}
/**
* clutter_actor_allocate_preferred_size:
* @self: a #ClutterActor
* @flags: flags controlling the allocation
*
* Allocates the natural size of @self.
*
* This function is a utility call for #ClutterActor implementations
* that allocates the actor's preferred natural size. It can be used
* by fixed layout managers (like #ClutterGroup or so called
* 'composite actors') inside the ClutterActor::allocate
* implementation to give each child exactly how much space it
* requires.
*
* This function is not meant to be used by applications. It is also
* not meant to be used outside the implementation of the
* ClutterActor::allocate virtual function.
*
* Since: 0.8
*/
void
clutter_actor_allocate_preferred_size (ClutterActor *self,
ClutterAllocationFlags flags)
{
gfloat actor_x, actor_y;
gfloat natural_width, natural_height;
ClutterActorBox actor_box;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
actor_x = clutter_actor_get_x (self);
actor_y = clutter_actor_get_y (self);
clutter_actor_get_preferred_size (self,
NULL, NULL,
&natural_width,
&natural_height);
actor_box.x1 = actor_x;
actor_box.y1 = actor_y;
actor_box.x2 = actor_box.x1 + natural_width;
actor_box.y2 = actor_box.y1 + natural_height;
clutter_actor_allocate (self, &actor_box, flags);
}
/**
* clutter_actor_grab_key_focus:
* @self: a #ClutterActor
*
* Sets the key focus of the #ClutterStage including @self
* to this #ClutterActor.
*
* Since: 1.0
*/
void
clutter_actor_grab_key_focus (ClutterActor *self)
{
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
parent = clutter_actor_get_parent (self);
if (!parent)
return;
parent = clutter_actor_get_stage (self);
if (parent && CLUTTER_IS_STAGE (parent))
clutter_stage_set_key_focus (CLUTTER_STAGE (parent), self);
}
/**
* clutter_actor_get_pango_context:
* @self: a #ClutterActor
*
* Retrieves the #PangoContext for @self. The actor's #PangoContext
* is already configured using the appropriate font map, resolution
* and font options.
*
* Unlike clutter_actor_create_pango_context(), this context is owend
* by the #ClutterActor and it will be updated each time the options
* stored by the #ClutterBackend change.
*
* You can use the returned #PangoContext to create a #PangoLayout
* and render text using cogl_pango_render_layout() to reuse the
* glyphs cache also used by Clutter.
*
* Return value: (transfer none): the #PangoContext for a #ClutterActor.
* The returned #PangoContext is owned by the actor and should not be
* unreferenced by the application code
*
* Since: 1.0
*/
PangoContext *
clutter_actor_get_pango_context (ClutterActor *self)
{
ClutterActorPrivate *priv;
ClutterMainContext *ctx;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
priv = self->priv;
if (priv->pango_context)
return priv->pango_context;
ctx = CLUTTER_CONTEXT ();
priv->pango_context = _clutter_context_get_pango_context (ctx);
g_object_ref (priv->pango_context);
return priv->pango_context;
}
/**
* clutter_actor_create_pango_context:
* @self: a #ClutterActor
*
* Creates a #PangoContext for the given actor. The #PangoContext
* is already configured using the appropriate font map, resolution
* and font options.
*
* See also clutter_actor_get_pango_context().
*
* Return value: the newly created #PangoContext. Use g_object_unref()
* on the returned value to deallocate its resources
*
* Since: 1.0
*/
PangoContext *
clutter_actor_create_pango_context (ClutterActor *self)
{
ClutterMainContext *ctx;
PangoContext *retval;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
ctx = CLUTTER_CONTEXT ();
retval = _clutter_context_create_pango_context (ctx);
return retval;
}
/**
* clutter_actor_create_pango_layout:
* @self: a #ClutterActor
* @text: (allow-none) the text to set on the #PangoLayout, or %NULL
*
* Creates a new #PangoLayout from the same #PangoContext used
* by the #ClutterActor. The #PangoLayout is already configured
* with the font map, resolution and font options, and the
* given @text.
*
* If you want to keep around a #PangoLayout created by this
* function you will have to connect to the #ClutterBackend::font-changed
* and #ClutterBackend::resolution-changed signals, and call
* pango_layout_context_changed() in response to them.
*
* Return value: the newly created #PangoLayout. Use g_object_unref()
* when done
*
* Since: 1.0
*/
PangoLayout *
clutter_actor_create_pango_layout (ClutterActor *self,
const gchar *text)
{
PangoContext *context;
PangoLayout *layout;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
context = clutter_actor_get_pango_context (self);
layout = pango_layout_new (context);
if (text)
pango_layout_set_text (layout, text, -1);
return layout;
}
/* Allows overriding the parent traversed when querying an actors paint
* opacity. Used by ClutterClone. */
void
_clutter_actor_set_opacity_parent (ClutterActor *self,
ClutterActor *parent)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->opacity_parent = parent;
}
/* Allows you to disable applying the actors model view transform during
* a paint. Used by ClutterClone. */
void
_clutter_actor_set_enable_model_view_transform (ClutterActor *self,
gboolean enable)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->enable_model_view_transform = enable;
}
void
_clutter_actor_set_enable_paint_unmapped (ClutterActor *self,
gboolean enable)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
priv->enable_paint_unmapped = enable;
if (priv->enable_paint_unmapped)
{
/* Make sure that the parents of the widget are realized first;
* otherwise checks in clutter_actor_update_map_state() will
* fail.
*/
clutter_actor_realize (self);
clutter_actor_update_map_state (self, MAP_STATE_MAKE_MAPPED);
}
else
{
clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNMAPPED);
}
}
static void
clutter_anchor_coord_get_units (ClutterActor *self,
const AnchorCoord *coord,
gfloat *x,
gfloat *y,
gfloat *z)
{
if (coord->is_fractional)
{
gfloat actor_width, actor_height;
clutter_actor_get_size (self, &actor_width, &actor_height);
if (x)
*x = actor_width * coord->v.fraction.x;
if (y)
*y = actor_height * coord->v.fraction.y;
if (z)
*z = 0;
}
else
{
if (x)
*x = coord->v.units.x;
if (y)
*y = coord->v.units.y;
if (z)
*z = coord->v.units.z;
}
}
static void
clutter_anchor_coord_set_units (AnchorCoord *coord,
gfloat x,
gfloat y,
gfloat z)
{
coord->is_fractional = FALSE;
coord->v.units.x = x;
coord->v.units.y = y;
coord->v.units.z = z;
}
static ClutterGravity
clutter_anchor_coord_get_gravity (AnchorCoord *coord)
{
if (coord->is_fractional)
{
if (coord->v.fraction.x == 0.0)
{
if (coord->v.fraction.y == 0.0)
return CLUTTER_GRAVITY_NORTH_WEST;
else if (coord->v.fraction.y == 0.5)
return CLUTTER_GRAVITY_WEST;
else if (coord->v.fraction.y == 1.0)
return CLUTTER_GRAVITY_SOUTH_WEST;
else
return CLUTTER_GRAVITY_NONE;
}
else if (coord->v.fraction.x == 0.5)
{
if (coord->v.fraction.y == 0.0)
return CLUTTER_GRAVITY_NORTH;
else if (coord->v.fraction.y == 0.5)
return CLUTTER_GRAVITY_CENTER;
else if (coord->v.fraction.y == 1.0)
return CLUTTER_GRAVITY_SOUTH;
else
return CLUTTER_GRAVITY_NONE;
}
else if (coord->v.fraction.x == 1.0)
{
if (coord->v.fraction.y == 0.0)
return CLUTTER_GRAVITY_NORTH_EAST;
else if (coord->v.fraction.y == 0.5)
return CLUTTER_GRAVITY_EAST;
else if (coord->v.fraction.y == 1.0)
return CLUTTER_GRAVITY_SOUTH_EAST;
else
return CLUTTER_GRAVITY_NONE;
}
else
return CLUTTER_GRAVITY_NONE;
}
else
return CLUTTER_GRAVITY_NONE;
}
static void
clutter_anchor_coord_set_gravity (AnchorCoord *coord,
ClutterGravity gravity)
{
switch (gravity)
{
case CLUTTER_GRAVITY_NORTH:
coord->v.fraction.x = 0.5;
coord->v.fraction.y = 0.0;
break;
case CLUTTER_GRAVITY_NORTH_EAST:
coord->v.fraction.x = 1.0;
coord->v.fraction.y = 0.0;
break;
case CLUTTER_GRAVITY_EAST:
coord->v.fraction.x = 1.0;
coord->v.fraction.y = 0.5;
break;
case CLUTTER_GRAVITY_SOUTH_EAST:
coord->v.fraction.x = 1.0;
coord->v.fraction.y = 1.0;
break;
case CLUTTER_GRAVITY_SOUTH:
coord->v.fraction.x = 0.5;
coord->v.fraction.y = 1.0;
break;
case CLUTTER_GRAVITY_SOUTH_WEST:
coord->v.fraction.x = 0.0;
coord->v.fraction.y = 1.0;
break;
case CLUTTER_GRAVITY_WEST:
coord->v.fraction.x = 0.0;
coord->v.fraction.y = 0.5;
break;
case CLUTTER_GRAVITY_NORTH_WEST:
coord->v.fraction.x = 0.0;
coord->v.fraction.y = 0.0;
break;
case CLUTTER_GRAVITY_CENTER:
coord->v.fraction.x = 0.5;
coord->v.fraction.y = 0.5;
break;
default:
coord->v.fraction.x = 0.0;
coord->v.fraction.y = 0.0;
break;
}
coord->is_fractional = TRUE;
}
static gboolean
clutter_anchor_coord_is_zero (const AnchorCoord *coord)
{
if (coord->is_fractional)
return coord->v.fraction.x == 0.0 && coord->v.fraction.y == 0.0;
else
return (coord->v.units.x == 0.0
&& coord->v.units.y == 0.0
&& coord->v.units.z == 0.0);
}
/**
* clutter_actor_get_flags:
* @self: a #ClutterActor
*
* Retrieves the flags set on @self
*
* Return value: a bitwise or of #ClutterActorFlags or 0
*
* Since: 1.0
*/
ClutterActorFlags
clutter_actor_get_flags (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
return self->flags;
}
/**
* clutter_actor_set_flags:
* @self: a #ClutterActor
* @flags: the flags to set
*
* Sets @flags on @self
*
* This function will emit notifications for the changed properties
*
* Since: 1.0
*/
void
clutter_actor_set_flags (ClutterActor *self,
ClutterActorFlags flags)
{
ClutterActorFlags old_flags;
GObject *obj;
gboolean was_reactive_set, reactive_set;
gboolean was_realized_set, realized_set;
gboolean was_mapped_set, mapped_set;
gboolean was_visible_set, visible_set;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (self->flags == flags)
return;
obj = G_OBJECT (self);
g_object_freeze_notify (obj);
old_flags = self->flags;
was_reactive_set = ((old_flags & CLUTTER_ACTOR_REACTIVE) != 0);
was_realized_set = ((old_flags & CLUTTER_ACTOR_REALIZED) != 0);
was_mapped_set = ((old_flags & CLUTTER_ACTOR_MAPPED) != 0);
was_visible_set = ((old_flags & CLUTTER_ACTOR_VISIBLE) != 0);
self->flags |= flags;
reactive_set = ((self->flags & CLUTTER_ACTOR_REACTIVE) != 0);
realized_set = ((self->flags & CLUTTER_ACTOR_REALIZED) != 0);
mapped_set = ((self->flags & CLUTTER_ACTOR_MAPPED) != 0);
visible_set = ((self->flags & CLUTTER_ACTOR_VISIBLE) != 0);
if (reactive_set != was_reactive_set)
g_object_notify (obj, "reactive");
if (realized_set != was_realized_set)
g_object_notify (obj, "realized");
if (mapped_set != was_mapped_set)
g_object_notify (obj, "mapped");
if (visible_set != was_visible_set)
g_object_notify (obj, "visible");
g_object_thaw_notify (obj);
}
/**
* clutter_actor_unset_flags:
* @self: a #ClutterActor
* @flags: the flags to unset
*
* Unsets @flags on @self
*
* This function will emit notifications for the changed properties
*
* Since: 1.0
*/
void
clutter_actor_unset_flags (ClutterActor *self,
ClutterActorFlags flags)
{
ClutterActorFlags old_flags;
GObject *obj;
gboolean was_reactive_set, reactive_set;
gboolean was_realized_set, realized_set;
gboolean was_mapped_set, mapped_set;
gboolean was_visible_set, visible_set;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
obj = G_OBJECT (self);
g_object_freeze_notify (obj);
old_flags = self->flags;
was_reactive_set = ((old_flags & CLUTTER_ACTOR_REACTIVE) != 0);
was_realized_set = ((old_flags & CLUTTER_ACTOR_REALIZED) != 0);
was_mapped_set = ((old_flags & CLUTTER_ACTOR_MAPPED) != 0);
was_visible_set = ((old_flags & CLUTTER_ACTOR_VISIBLE) != 0);
self->flags &= ~flags;
if (self->flags == old_flags)
return;
reactive_set = ((self->flags & CLUTTER_ACTOR_REACTIVE) != 0);
realized_set = ((self->flags & CLUTTER_ACTOR_REALIZED) != 0);
mapped_set = ((self->flags & CLUTTER_ACTOR_MAPPED) != 0);
visible_set = ((self->flags & CLUTTER_ACTOR_VISIBLE) != 0);
if (reactive_set != was_reactive_set)
g_object_notify (obj, "reactive");
if (realized_set != was_realized_set)
g_object_notify (obj, "realized");
if (mapped_set != was_mapped_set)
g_object_notify (obj, "mapped");
if (visible_set != was_visible_set)
g_object_notify (obj, "visible");
g_object_thaw_notify (obj);
}
/**
* clutter_actor_get_transformation_matrix:
* @self: a #ClutterActor
* @matrix: (out): the return location for a #CoglMatrix
*
* Retrieves the transformations applied to @self
*
* Since: 1.0
*/
void
clutter_actor_get_transformation_matrix (ClutterActor *self,
CoglMatrix *matrix)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
CLUTTER_ACTOR_GET_CLASS (self)->apply_transform (self, matrix);
}
/**
* clutter_actor_is_in_clone_paint:
* @self: a #ClutterActor
*
* Checks whether @self is being currently painted by a #ClutterClone
*
* This function is useful only inside the ::paint virtual function
* implementations or within handlers for the #ClutterActor::paint
* signal
*
* This function should not be used by applications
*
* Return value: %TRUE if the #ClutterActor is currently being painted
* by a #ClutterClone, and %FALSE otherwise
*
* Since: 1.0
*/
gboolean
clutter_actor_is_in_clone_paint (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
/* XXX - keep in sync with the overrides set by ClutterClone:
*
* - opacity_parent != NULL
* - enable_model_view_transform == FALSE
*/
return self->priv->opacity_parent != NULL &&
!self->priv->enable_model_view_transform;
}
static void
set_direction_recursive (ClutterActor *actor,
gpointer user_data)
{
ClutterTextDirection text_dir = GPOINTER_TO_INT (user_data);
clutter_actor_set_text_direction (actor, text_dir);
}
/**
* clutter_actor_set_text_direction:
* @self: a #ClutterActor
* @text_dir: the text direction for @self
*
* Sets the #ClutterTextDirection for an actor
*
* The passed text direction must not be %CLUTTER_TEXT_DIRECTION_DEFAULT
*
* If @self implements #ClutterContainer then this function will recurse
* inside all the children of @self (including the internal ones).
*
* Composite actors not implementing #ClutterContainer, or actors requiring
* special handling when the text direction changes, should connect to
* the #GObject::notify signal for the #ClutterActor:text-direction property
*
* Since: 1.2
*/
void
clutter_actor_set_text_direction (ClutterActor *self,
ClutterTextDirection text_dir)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
g_return_if_fail (text_dir != CLUTTER_TEXT_DIRECTION_DEFAULT);
priv = self->priv;
if (priv->text_direction != text_dir)
{
priv->text_direction = text_dir;
/* we need to emit the notify::text-direction first, so that
* the sub-classes can catch that and do specific handling of
* the text direction; see clutter_text_direction_changed_cb()
* inside clutter-text.c
*/
g_object_notify (G_OBJECT (self), "text-direction");
/* if this is a container we need to recurse */
if (CLUTTER_IS_CONTAINER (self))
{
ClutterContainer *container = CLUTTER_CONTAINER (self);
clutter_container_foreach_with_internals (container,
set_direction_recursive,
GINT_TO_POINTER (text_dir));
}
clutter_actor_queue_relayout (self);
}
}
void
_clutter_actor_set_has_pointer (ClutterActor *self,
gboolean has_pointer)
{
ClutterActorPrivate *priv = self->priv;
if (priv->has_pointer != has_pointer)
{
priv->has_pointer = has_pointer;
g_object_notify (G_OBJECT (self), "has-pointer");
}
}
/**
* clutter_actor_get_text_direction:
* @self: a #ClutterActor
*
* Retrieves the value set using clutter_actor_set_text_direction()
*
* If no text direction has been previously set, the default text
* direction, as returned by clutter_get_default_text_direction(), will
* be returned instead
*
* Return value: the #ClutterTextDirection for the actor
*
* Since: 1.2
*/
ClutterTextDirection
clutter_actor_get_text_direction (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self),
CLUTTER_TEXT_DIRECTION_LTR);
priv = self->priv;
/* if no direction has been set yet use the default */
if (priv->text_direction == CLUTTER_TEXT_DIRECTION_DEFAULT)
priv->text_direction = clutter_get_default_text_direction ();
return priv->text_direction;
}
/**
* clutter_actor_push_internal:
* @self: a #ClutterActor
*
* Should be used by actors implementing the #ClutterContainer and with
* internal children added through clutter_actor_set_parent(), for instance:
*
* |[
* static void
* my_actor_init (MyActor *self)
* {
* self->priv = SELF_ACTOR_GET_PRIVATE (self);
*
* clutter_actor_push_internal (CLUTTER_ACTOR (self));
*
* /&ast; calling clutter_actor_set_parent() now will result in
* &ast; the internal flag being set on a child of MyActor
* &ast;/
*
* /&ast; internal child: a background texture &ast;/
* self->priv->background_tex = clutter_texture_new ();
* clutter_actor_set_parent (self->priv->background_tex,
* CLUTTER_ACTOR (self));
*
* /&ast; internal child: a label &ast;/
* self->priv->label = clutter_text_new ();
* clutter_actor_set_parent (self->priv->label,
* CLUTTER_ACTOR (self));
*
* clutter_actor_pop_internal (CLUTTER_ACTOR (self));
*
* /&ast; calling clutter_actor_set_parent() now will not result in
* &ast; the internal flag being set on a child of MyActor
* &ast;/
* }
* ]|
*
* This function will be used by Clutter to toggle an "internal child"
* flag whenever clutter_actor_set_parent() is called; internal children
* are handled differently by Clutter, specifically when destroying their
* parent.
*
* Call clutter_actor_pop_internal() when you finished adding internal
* children.
*
* Nested calls to clutter_actor_push_internal() are allowed, but each
* one must by followed by a clutter_actor_pop_internal() call.
*
* Since: 1.2
*/
void
clutter_actor_push_internal (ClutterActor *self)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
self->priv->internal_child += 1;
}
/**
* clutter_actor_pop_internal:
* @self: a #ClutterActor
*
* Disables the effects of clutter_actor_pop_internal()
*
* Since: 1.2
*/
void
clutter_actor_pop_internal (ClutterActor *self)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
priv = self->priv;
if (priv->internal_child == 0)
{
g_warning ("Mismatched %s: you need to call "
"clutter_actor_push_composite() at least once before "
"calling this function", G_STRFUNC);
return;
}
priv->internal_child -= 1;
}
/**
* clutter_actor_has_pointer:
* @self: a #ClutterActor
*
* Checks whether an actor contains the the pointer of a
* #ClutterInputDevice
*
* Return value: %TRUE if the actor contains the pointer, and
* %FALSE otherwise
*
* Since: 1.2
*/
gboolean
clutter_actor_has_pointer (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
return self->priv->has_pointer;
}
/* XXX: This is a workaround for not being able to break the ABI of
* the QUEUE_REDRAW signal. It is an out-of-band argument. See
* clutter_actor_queue_clipped_redraw() for details.
*/
const ClutterActorBox *
_clutter_actor_get_queue_redraw_clip (ClutterActor *self)
{
return self->priv->oob_queue_redraw_clip;
}
void
_clutter_actor_set_queue_redraw_clip (ClutterActor *self,
const ClutterActorBox *clip)
{
self->priv->oob_queue_redraw_clip = clip;
}
Reference in New Issue View Git Blame Copy Permalink