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mutter/clutter/clutter-actor.h
Owen W. Taylor 8df4a0b8fd actor: Add has_allocation() method 
Add clutter_actor_has_allocation(), a method meant to be used when
deciding whether to call clutter_actor_get_allocation_box() or any
of its wrappers.

The get_allocation_box() method will, in case the allocation is invalid,
perform a costly re-allocation cycle to ensure that the returned box
is valid. The has_allocation() method is meant to be used if we have an
actor calling get_allocation_box() from outside the place where the
allocation is always guaranteed to be valid.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
2010-03-26 00:46:31 +00:00

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/*
* 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/>.
*/
#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
#error "Only <clutter/clutter.h> can be included directly."
#endif
#ifndef __CLUTTER_ACTOR_H__
#define __CLUTTER_ACTOR_H__
/* clutter-actor.h */
#include <glib-object.h>
#include <pango/pango.h>
#include <clutter/clutter-color.h>
#include <clutter/clutter-types.h>
#include <clutter/clutter-event.h>
#include <clutter/clutter-shader.h>
G_BEGIN_DECLS
#define CLUTTER_TYPE_ACTOR (clutter_actor_get_type ())
#define CLUTTER_ACTOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_ACTOR, ClutterActor))
#define CLUTTER_ACTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_ACTOR, ClutterActorClass))
#define CLUTTER_IS_ACTOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_ACTOR))
#define CLUTTER_IS_ACTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_ACTOR))
#define CLUTTER_ACTOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_ACTOR, ClutterActorClass))
/**
* CLUTTER_ACTOR_SET_FLAGS:
* @a: a #ClutterActor
* @f: the #ClutterActorFlags to set
*
* Sets the given flags on a #ClutterActor
*/
#define CLUTTER_ACTOR_SET_FLAGS(a,f) (((ClutterActor*)(a))->flags |= (f))
/**
* CLUTTER_ACTOR_UNSET_FLAGS:
* @a: a #ClutterActor
* @f: the #ClutterActorFlags to unset
*
* Unsets the given flags on a #ClutterActor
*/
#define CLUTTER_ACTOR_UNSET_FLAGS(a,f) (((ClutterActor*)(a))->flags &= ~(f))
#define CLUTTER_ACTOR_IS_MAPPED(a) ((((ClutterActor*)(a))->flags & CLUTTER_ACTOR_MAPPED) != FALSE)
#define CLUTTER_ACTOR_IS_REALIZED(a) ((((ClutterActor*)(a))->flags & CLUTTER_ACTOR_REALIZED) != FALSE)
#define CLUTTER_ACTOR_IS_VISIBLE(a) ((((ClutterActor*)(a))->flags & CLUTTER_ACTOR_VISIBLE) != FALSE)
#define CLUTTER_ACTOR_IS_REACTIVE(a) ((((ClutterActor*)(a))->flags & CLUTTER_ACTOR_REACTIVE) != FALSE)
typedef struct _ClutterActorClass ClutterActorClass;
typedef struct _ClutterActorPrivate ClutterActorPrivate;
/**
* ClutterCallback:
* @actor: a #ClutterActor
* @data: user data
*
* Generic callback
*/
typedef void (*ClutterCallback) (ClutterActor *actor,
gpointer data);
/**
* CLUTTER_CALLBACK
* @f: a function
*
* Convenience macro to cast a function to #ClutterCallback
*/
#define CLUTTER_CALLBACK(f) ((ClutterCallback) (f))
/**
* ClutterActorFlags:
* @CLUTTER_ACTOR_MAPPED: the actor will be painted (is visible, and inside
* a toplevel, and all parents visible)
* @CLUTTER_ACTOR_REALIZED: the resources associated to the actor have been
* allocated
* @CLUTTER_ACTOR_REACTIVE: the actor 'reacts' to mouse events emmitting event
* signals
* @CLUTTER_ACTOR_VISIBLE: the actor has been shown by the application program
* @CLUTTER_ACTOR_NO_LAYOUT: the actor provides an explicit layout management
* policy for its children; this flag will prevent Clutter from automatic
* queueing of relayout and will defer all layouting to the actor itself
*
* Flags used to signal the state of an actor.
*/
typedef enum
{
CLUTTER_ACTOR_MAPPED = 1 << 1,
CLUTTER_ACTOR_REALIZED = 1 << 2,
CLUTTER_ACTOR_REACTIVE = 1 << 3,
CLUTTER_ACTOR_VISIBLE = 1 << 4,
CLUTTER_ACTOR_NO_LAYOUT = 1 << 5
} ClutterActorFlags;
/**
* ClutterAllocationFlags:
* @CLUTTER_ALLOCATION_NONE: No flag set
* @CLUTTER_ABSOLUTE_ORIGIN_CHANGED: Whether the absolute origin of the
* actor has changed; this implies that any ancestor of the actor has
* been moved
*
* Flags passed to the #ClutterActor::allocate() virtual function and
* to the clutter_actor_allocate() function
*
* Since: 1.0
*/
typedef enum
{
CLUTTER_ALLOCATION_NONE = 0,
CLUTTER_ABSOLUTE_ORIGIN_CHANGED = 1 << 1
} ClutterAllocationFlags;
/**
* ClutterRedrawFlags:
* @CLUTTER_REDRAW_CLIPPED_TO_BOX: Tells clutter the redraw is clipped
* to a given clip box in actor coordinates.
* @CLUTTER_REDRAW_CLIPPED_TO_ALLOCATION: Tells clutter the maximum
* extents of what needs to be redrawn lies within the actors
* current allocation.
*
* Flags passed to the clutter_actor_queue_redraw_with_clip ()
* function
*
* Since: 1.2
*/
typedef enum
{
CLUTTER_REDRAW_CLIPPED_TO_BOX = 0,
CLUTTER_REDRAW_CLIPPED_TO_ALLOCATION = 1 << 1
} ClutterRedrawFlags;
/**
* ClutterActor:
* @flags: #ClutterActorFlags
*
* Base class for actors.
*/
struct _ClutterActor
{
/*< private >*/
GInitiallyUnowned parent_instance;
/*< public >*/
guint32 flags;
/*< private >*/
guint32 private_flags;
ClutterActorPrivate *priv;
};
/**
* ClutterActorClass:
* @show: signal class handler for #ClutterActor::show; it must chain
* up to the parent's implementation
* @show_all: virtual function for containers and composite actors, to
* determine which children should be shown when calling
* clutter_actor_show_all() on the actor. Defaults to calling
* clutter_actor_show().
* @hide: signal class handler for #ClutterActor::hide; it must chain
* up to the parent's implementation
* @hide_all: virtual function for containers and composite actors, to
* determine which children should be shown when calling
* clutter_actor_hide_all() on the actor. Defaults to calling
* clutter_actor_hide().
* @realize: virtual function, used to allocate resources for the actor;
* it should chain up to the parent's implementation
* @unrealize: virtual function, used to deallocate resources allocated
* in ::realize; it should chain up to the parent's implementation
* @map: virtual function for containers and composite actors, to
* map their children; it must chain up to the parent's implementation
* @unmap: virtual function for containers and composite actors, to
* unmap their children; it must chain up to the parent's implementation
* @paint: virtual function, used to paint the actor
* @get_preferred_width: virtual function, used when querying the minimum
* and natural widths of an actor for a given height; it is used by
* clutter_actor_get_preferred_width()
* @get_preferred_height: virtual function, used when querying the minimum
* and natural heights of an actor for a given width; it is used by
* clutter_actor_get_preferred_height()
* @allocate: virtual function, used when settings the coordinates of an
* actor; it is used by clutter_actor_allocate(); it must chain up to
* the parent's implementation
* @apply_transform: virtual function, used when applying the transformations
* to an actor before painting it or when transforming coordinates or
* the allocation; it must chain up to the parent's implementation
* @parent_set: signal class handler for the #ClutterActor::parent-set
* @destroy: signal class handler for #ClutterActor::destroy
* @pick: virtual function, used to draw an outline of the actor with
* the given color
* @queue_redraw: class handler for #ClutterActor::queue-redraw
* @event: class handler for #ClutterActor::event
* @button_press_event: class handler for #ClutterActor::button-press-event
* @button_release_event: class handler for
* #ClutterActor::button-release-event
* @scroll_event: signal class closure for #ClutterActor::scroll-event
* @key_press_event: signal class closure for #ClutterActor::key-press-event
* @key_release_event: signal class closure for
* #ClutterActor::key-release-event
* @motion_event: signal class closure for #ClutterActor::motion-event
* @enter_event: signal class closure for #ClutterActor::enter-event
* @leave_event: signal class closure for #ClutterActor::leave-event
* @captured_event: signal class closure for #ClutterActor::captured-event
* @key_focus_in: signal class closure for #ClutterActor::focus-in
* @key_focus_out: signal class closure for #ClutterActor::focus-out
* @queue_relayout: class handler for #ClutterActor::queue-relayout
*
* Base class for actors.
*/
struct _ClutterActorClass
{
/*< private >*/
GInitiallyUnownedClass parent_class;
/*< public >*/
void (* show) (ClutterActor *actor);
void (* show_all) (ClutterActor *actor);
void (* hide) (ClutterActor *actor);
void (* hide_all) (ClutterActor *actor);
void (* realize) (ClutterActor *actor);
void (* unrealize) (ClutterActor *actor);
void (* map) (ClutterActor *actor);
void (* unmap) (ClutterActor *actor);
void (* paint) (ClutterActor *actor);
void (* parent_set) (ClutterActor *actor,
ClutterActor *old_parent);
void (* destroy) (ClutterActor *actor);
void (* pick) (ClutterActor *actor,
const ClutterColor *color);
void (* queue_redraw) (ClutterActor *actor,
ClutterActor *leaf_that_queued);
/* size negotiation */
void (* get_preferred_width) (ClutterActor *actor,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p);
void (* get_preferred_height) (ClutterActor *actor,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p);
void (* allocate) (ClutterActor *actor,
const ClutterActorBox *box,
ClutterAllocationFlags flags);
/* transformations */
void (* apply_transform) (ClutterActor *actor,
CoglMatrix *matrix);
/* event signals */
gboolean (* event) (ClutterActor *actor,
ClutterEvent *event);
gboolean (* button_press_event) (ClutterActor *actor,
ClutterButtonEvent *event);
gboolean (* button_release_event) (ClutterActor *actor,
ClutterButtonEvent *event);
gboolean (* scroll_event) (ClutterActor *actor,
ClutterScrollEvent *event);
gboolean (* key_press_event) (ClutterActor *actor,
ClutterKeyEvent *event);
gboolean (* key_release_event) (ClutterActor *actor,
ClutterKeyEvent *event);
gboolean (* motion_event) (ClutterActor *actor,
ClutterMotionEvent *event);
gboolean (* enter_event) (ClutterActor *actor,
ClutterCrossingEvent *event);
gboolean (* leave_event) (ClutterActor *actor,
ClutterCrossingEvent *event);
gboolean (* captured_event) (ClutterActor *actor,
ClutterEvent *event);
void (* key_focus_in) (ClutterActor *actor);
void (* key_focus_out) (ClutterActor *actor);
void (* queue_relayout) (ClutterActor *actor);
/*< private >*/
/* padding for future expansion */
gpointer _padding_dummy[31];
};
GType clutter_actor_get_type (void) G_GNUC_CONST;
void clutter_actor_set_flags (ClutterActor *self,
ClutterActorFlags flags);
void clutter_actor_unset_flags (ClutterActor *self,
ClutterActorFlags flags);
ClutterActorFlags clutter_actor_get_flags (ClutterActor *self);
void clutter_actor_show (ClutterActor *self);
void clutter_actor_show_all (ClutterActor *self);
void clutter_actor_hide (ClutterActor *self);
void clutter_actor_hide_all (ClutterActor *self);
void clutter_actor_realize (ClutterActor *self);
void clutter_actor_unrealize (ClutterActor *self);
void clutter_actor_map (ClutterActor *self);
void clutter_actor_unmap (ClutterActor *self);
void clutter_actor_paint (ClutterActor *self);
void clutter_actor_queue_redraw (ClutterActor *self);
void clutter_actor_queue_relayout (ClutterActor *self);
void clutter_actor_destroy (ClutterActor *self);
/* size negotiation */
void clutter_actor_set_request_mode (ClutterActor *self,
ClutterRequestMode mode);
ClutterRequestMode clutter_actor_get_request_mode (ClutterActor *self);
void clutter_actor_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p);
void clutter_actor_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p);
void clutter_actor_get_preferred_size (ClutterActor *self,
gfloat *min_width_p,
gfloat *min_height_p,
gfloat *natural_width_p,
gfloat *natural_height_p);
void clutter_actor_allocate (ClutterActor *self,
const ClutterActorBox *box,
ClutterAllocationFlags flags);
void clutter_actor_allocate_preferred_size (ClutterActor *self,
ClutterAllocationFlags flags);
void clutter_actor_allocate_available_size (ClutterActor *self,
gfloat x,
gfloat y,
gfloat available_width,
gfloat available_height,
ClutterAllocationFlags flags);
void clutter_actor_get_allocation_box (ClutterActor *self,
ClutterActorBox *box);
void clutter_actor_get_allocation_geometry (ClutterActor *self,
ClutterGeometry *geom);
void clutter_actor_get_allocation_vertices (ClutterActor *self,
ClutterActor *ancestor,
ClutterVertex verts[]);
void clutter_actor_set_geometry (ClutterActor *self,
const ClutterGeometry *geometry);
void clutter_actor_get_geometry (ClutterActor *self,
ClutterGeometry *geometry);
void clutter_actor_set_size (ClutterActor *self,
gfloat width,
gfloat height);
void clutter_actor_get_size (ClutterActor *self,
gfloat *width,
gfloat *height);
void clutter_actor_get_transformed_size (ClutterActor *self,
gfloat *width,
gfloat *height);
void clutter_actor_set_position (ClutterActor *self,
gfloat x,
gfloat y);
void clutter_actor_get_position (ClutterActor *self,
gfloat *x,
gfloat *y);
void clutter_actor_get_transformed_position (ClutterActor *self,
gfloat *x,
gfloat *y);
gboolean clutter_actor_get_fixed_position_set (ClutterActor *self);
void clutter_actor_set_fixed_position_set (ClutterActor *self,
gboolean is_set);
gfloat clutter_actor_get_width (ClutterActor *self);
gfloat clutter_actor_get_height (ClutterActor *self);
void clutter_actor_set_width (ClutterActor *self,
gfloat width);
void clutter_actor_set_height (ClutterActor *self,
gfloat height);
gfloat clutter_actor_get_x (ClutterActor *self);
gfloat clutter_actor_get_y (ClutterActor *self);
void clutter_actor_set_x (ClutterActor *self,
gfloat x);
void clutter_actor_set_y (ClutterActor *self,
gfloat y);
void clutter_actor_set_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle,
gfloat x,
gfloat y,
gfloat z);
void clutter_actor_set_z_rotation_from_gravity (ClutterActor *self,
gdouble angle,
ClutterGravity gravity);
gdouble clutter_actor_get_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gfloat *x,
gfloat *y,
gfloat *z);
ClutterGravity clutter_actor_get_z_rotation_gravity (ClutterActor *self);
void clutter_actor_set_opacity (ClutterActor *self,
guint8 opacity);
guint8 clutter_actor_get_opacity (ClutterActor *self);
guint8 clutter_actor_get_paint_opacity (ClutterActor *self);
gboolean clutter_actor_get_paint_visibility (ClutterActor *self);
void clutter_actor_set_name (ClutterActor *self,
const gchar *name);
G_CONST_RETURN gchar *clutter_actor_get_name (ClutterActor *self);
guint32 clutter_actor_get_gid (ClutterActor *self);
void clutter_actor_set_clip (ClutterActor *self,
gfloat xoff,
gfloat yoff,
gfloat width,
gfloat height);
void clutter_actor_remove_clip (ClutterActor *self);
gboolean clutter_actor_has_clip (ClutterActor *self);
void clutter_actor_get_clip (ClutterActor *self,
gfloat *xoff,
gfloat *yoff,
gfloat *width,
gfloat *height);
void clutter_actor_set_parent (ClutterActor *self,
ClutterActor *parent);
ClutterActor * clutter_actor_get_parent (ClutterActor *self);
void clutter_actor_reparent (ClutterActor *self,
ClutterActor *new_parent);
void clutter_actor_unparent (ClutterActor *self);
ClutterActor* clutter_actor_get_stage (ClutterActor *actor);
void clutter_actor_raise (ClutterActor *self,
ClutterActor *below);
void clutter_actor_lower (ClutterActor *self,
ClutterActor *above);
void clutter_actor_raise_top (ClutterActor *self);
void clutter_actor_lower_bottom (ClutterActor *self);
void clutter_actor_set_depth (ClutterActor *self,
gfloat depth);
gfloat clutter_actor_get_depth (ClutterActor *self);
void clutter_actor_set_scale (ClutterActor *self,
gdouble scale_x,
gdouble scale_y);
void clutter_actor_set_scale_full (ClutterActor *self,
gdouble scale_x,
gdouble scale_y,
gfloat center_x,
gfloat center_y);
void clutter_actor_set_scale_with_gravity (ClutterActor *self,
gdouble scale_x,
gdouble scale_y,
ClutterGravity gravity);
void clutter_actor_get_scale (ClutterActor *self,
gdouble *scale_x,
gdouble *scale_y);
void clutter_actor_get_scale_center (ClutterActor *self,
gfloat *center_x,
gfloat *center_y);
ClutterGravity clutter_actor_get_scale_gravity (ClutterActor *self);
void clutter_actor_move_by (ClutterActor *self,
gfloat dx,
gfloat dy);
void clutter_actor_set_reactive (ClutterActor *actor,
gboolean reactive);
gboolean clutter_actor_get_reactive (ClutterActor *actor);
gboolean clutter_actor_event (ClutterActor *actor,
ClutterEvent *event,
gboolean capture);
ClutterActor * clutter_get_actor_by_gid (guint32 id);
gboolean clutter_actor_set_shader (ClutterActor *self,
ClutterShader *shader);
ClutterShader * clutter_actor_get_shader (ClutterActor *self);
void clutter_actor_set_shader_param (ClutterActor *self,
const gchar *param,
const GValue *value);
void clutter_actor_set_shader_param_int (ClutterActor *self,
const gchar *param,
gint value);
void clutter_actor_set_shader_param_float (ClutterActor *self,
const gchar *param,
gfloat value);
void clutter_actor_set_anchor_point (ClutterActor *self,
gfloat anchor_x,
gfloat anchor_y);
void clutter_actor_move_anchor_point (ClutterActor *self,
gfloat anchor_x,
gfloat anchor_y);
void clutter_actor_get_anchor_point (ClutterActor *self,
gfloat *anchor_x,
gfloat *anchor_y);
ClutterGravity clutter_actor_get_anchor_point_gravity (ClutterActor *self);
void clutter_actor_set_anchor_point_from_gravity (ClutterActor *self,
ClutterGravity gravity);
void clutter_actor_move_anchor_point_from_gravity (ClutterActor *self,
ClutterGravity gravity);
gboolean clutter_actor_transform_stage_point (ClutterActor *self,
gfloat x,
gfloat y,
gfloat *x_out,
gfloat *y_out);
gboolean clutter_actor_is_rotated (ClutterActor *self);
gboolean clutter_actor_is_scaled (ClutterActor *self);
gboolean clutter_actor_should_pick_paint (ClutterActor *self);
void clutter_actor_get_abs_allocation_vertices (ClutterActor *self,
ClutterVertex verts[]);
void clutter_actor_apply_transform_to_point (ClutterActor *self,
const ClutterVertex *point,
ClutterVertex *vertex);
void clutter_actor_apply_relative_transform_to_point (ClutterActor *self,
ClutterActor *ancestor,
const ClutterVertex *point,
ClutterVertex *vertex);
void clutter_actor_grab_key_focus (ClutterActor *self);
PangoContext *clutter_actor_get_pango_context (ClutterActor *self);
PangoContext *clutter_actor_create_pango_context (ClutterActor *self);
PangoLayout * clutter_actor_create_pango_layout (ClutterActor *self,
const gchar *text);
void clutter_actor_get_transformation_matrix (ClutterActor *self,
CoglMatrix *matrix);
gboolean clutter_actor_is_in_clone_paint (ClutterActor *self);
gboolean clutter_actor_has_pointer (ClutterActor *self);
void clutter_actor_set_text_direction (ClutterActor *self,
ClutterTextDirection text_dir);
ClutterTextDirection clutter_actor_get_text_direction (ClutterActor *self);
void clutter_actor_push_internal (ClutterActor *self);
void clutter_actor_pop_internal (ClutterActor *self);
gboolean clutter_actor_has_allocation (ClutterActor *self);
G_END_DECLS
#endif /* __CLUTTER_ACTOR_H__ */
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