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mutter/clutter/clutter-box-layout.c
Emmanuele Bassi f854619bc9 box-layout: Fix allocation brain farts 
The allocation code for BoxLayout contains a sequence of brain farts
that make it barely working since the synchronization of the layout
algorithm to the one in GtkBox.

The origin of the layout is inverted, and it doesn't take into
consideration a modified allocation origin (for actors the provide
padding or margin).

The pack-start property is broken, and it only works because we walk the
children list backwards; this horribly breaks when a child changes
visibility. Plus, we count invisible children, which leads to
allocations getting insane origins (either close to -MAX_FLOAT or
MAX_FLOAT).

Finally, the allocation is applied twice even for non-animated cases.

https://bugzilla.gnome.org/show_bug.cgi?id=669291
2012-02-14 16:01:21 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2009 Intel Corporation.
*
* 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/>.
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
*
* Based on the NBTK NbtkBoxLayout actor by:
* Thomas Wood <thomas.wood@intel.com>
*/
/**
* SECTION:clutter-box-layout
* @short_description: A layout manager arranging children on a single line
*
* The #ClutterBoxLayout is a #ClutterLayoutManager implementing the
* following layout policy:
* <itemizedlist>
* <listitem><para>all children are arranged on a single
* line;</para></listitem>
* <listitem><para>the axis used is controlled by the
* #ClutterBoxLayout:vertical boolean property;</para></listitem>
* <listitem><para>the order of the packing is determined by the
* #ClutterBoxLayout:pack-start boolean property;</para></listitem>
* <listitem><para>each child will be allocated to its natural
* size or, if set to expand, the available size;</para></listitem>
* <listitem><para>if a child is set to fill on either (or both)
* axis, its allocation will match all the available size; the
* fill layout property only makes sense if the expand property is
* also set;</para></listitem>
* <listitem><para>if a child is set to expand but not to fill then
* it is possible to control the alignment using the X and Y alignment
* layout properties.</para></listitem>
* <listitem><para>if the #ClutterBoxLayout:homogeneous boolean property
* is set, then all widgets will get the same size, ignoring expand
* settings and the preferred sizes</para></listitem>
* </itemizedlist>
*
* <figure id="box-layout">
* <title>Box layout</title>
* <para>The image shows a #ClutterBoxLayout with the
* #ClutterBoxLayout:vertical property set to %FALSE.</para>
* <graphic fileref="box-layout.png" format="PNG"/>
* </figure>
*
* It is possible to control the spacing between children of a
* #ClutterBoxLayout by using clutter_box_layout_set_spacing().
*
* In order to set the layout properties when packing an actor inside a
* #ClutterBoxLayout you should use the clutter_box_layout_pack()
* function.
*
* #ClutterBoxLayout is available since Clutter 1.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#define CLUTTER_DISABLE_DEPRECATION_WARNINGS
#include "deprecated/clutter-container.h"
#include "clutter-box-layout.h"
#include "clutter-actor-private.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-layout-meta.h"
#include "clutter-private.h"
#include "clutter-types.h"
#define CLUTTER_TYPE_BOX_CHILD (clutter_box_child_get_type ())
#define CLUTTER_BOX_CHILD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BOX_CHILD, ClutterBoxChild))
#define CLUTTER_IS_BOX_CHILD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BOX_CHILD))
#define CLUTTER_BOX_LAYOUT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_BOX_LAYOUT, ClutterBoxLayoutPrivate))
typedef struct _ClutterBoxChild ClutterBoxChild;
typedef struct _ClutterLayoutMetaClass ClutterBoxChildClass;
struct _ClutterBoxLayoutPrivate
{
ClutterContainer *container;
guint spacing;
gulong easing_mode;
guint easing_duration;
guint is_vertical : 1;
guint is_pack_start : 1;
guint is_animating : 1;
guint use_animations : 1;
guint is_homogeneous : 1;
};
struct _ClutterBoxChild
{
ClutterLayoutMeta parent_instance;
ClutterBoxAlignment x_align;
ClutterBoxAlignment y_align;
ClutterActorBox last_allocation;
guint x_fill : 1;
guint y_fill : 1;
guint expand : 1;
guint has_last_allocation : 1;
};
enum
{
PROP_CHILD_0,
PROP_CHILD_X_ALIGN,
PROP_CHILD_Y_ALIGN,
PROP_CHILD_X_FILL,
PROP_CHILD_Y_FILL,
PROP_CHILD_EXPAND,
PROP_CHILD_LAST
};
enum
{
PROP_0,
PROP_SPACING,
PROP_VERTICAL,
PROP_HOMOGENEOUS,
PROP_PACK_START,
PROP_USE_ANIMATIONS,
PROP_EASING_MODE,
PROP_EASING_DURATION,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST] = { NULL, };
G_DEFINE_TYPE (ClutterBoxChild,
clutter_box_child,
CLUTTER_TYPE_LAYOUT_META);
G_DEFINE_TYPE (ClutterBoxLayout,
clutter_box_layout,
CLUTTER_TYPE_LAYOUT_MANAGER);
/*
* ClutterBoxChild
*/
static void
box_child_set_align (ClutterBoxChild *self,
ClutterBoxAlignment x_align,
ClutterBoxAlignment y_align)
{
gboolean x_changed = FALSE, y_changed = FALSE;
if (self->x_align != x_align)
{
self->x_align = x_align;
x_changed = TRUE;
}
if (self->y_align != y_align)
{
self->y_align = y_align;
y_changed = TRUE;
}
if (x_changed || y_changed)
{
ClutterLayoutManager *layout;
ClutterBoxLayout *box;
layout = clutter_layout_meta_get_manager (CLUTTER_LAYOUT_META (self));
box = CLUTTER_BOX_LAYOUT (layout);
if (box->priv->use_animations)
{
clutter_layout_manager_begin_animation (layout,
box->priv->easing_duration,
box->priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (layout);
if (x_changed)
g_object_notify (G_OBJECT (self), "x-align");
if (y_changed)
g_object_notify (G_OBJECT (self), "y-align");
}
}
static void
box_child_set_fill (ClutterBoxChild *self,
gboolean x_fill,
gboolean y_fill)
{
gboolean x_changed = FALSE, y_changed = FALSE;
if (self->x_fill != x_fill)
{
self->x_fill = x_fill;
x_changed = TRUE;
}
if (self->y_fill != y_fill)
{
self->y_fill = y_fill;
y_changed = TRUE;
}
if (x_changed || y_changed)
{
ClutterLayoutManager *layout;
ClutterBoxLayout *box;
layout = clutter_layout_meta_get_manager (CLUTTER_LAYOUT_META (self));
box = CLUTTER_BOX_LAYOUT (layout);
if (box->priv->use_animations)
{
clutter_layout_manager_begin_animation (layout,
box->priv->easing_duration,
box->priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (layout);
if (x_changed)
g_object_notify (G_OBJECT (self), "x-fill");
if (y_changed)
g_object_notify (G_OBJECT (self), "y-fill");
}
}
static void
box_child_set_expand (ClutterBoxChild *self,
gboolean expand)
{
if (self->expand != expand)
{
ClutterLayoutManager *layout;
ClutterBoxLayout *box;
self->expand = expand;
layout = clutter_layout_meta_get_manager (CLUTTER_LAYOUT_META (self));
box = CLUTTER_BOX_LAYOUT (layout);
if (box->priv->use_animations)
{
clutter_layout_manager_begin_animation (layout,
box->priv->easing_duration,
box->priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (layout);
g_object_notify (G_OBJECT (self), "expand");
}
}
static void
clutter_box_child_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBoxChild *self = CLUTTER_BOX_CHILD (gobject);
switch (prop_id)
{
case PROP_CHILD_X_ALIGN:
box_child_set_align (self,
g_value_get_enum (value),
self->y_align);
break;
case PROP_CHILD_Y_ALIGN:
box_child_set_align (self,
self->x_align,
g_value_get_enum (value));
break;
case PROP_CHILD_X_FILL:
box_child_set_fill (self,
g_value_get_boolean (value),
self->y_fill);
break;
case PROP_CHILD_Y_FILL:
box_child_set_fill (self,
self->x_fill,
g_value_get_boolean (value));
break;
case PROP_CHILD_EXPAND:
box_child_set_expand (self, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_child_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBoxChild *self = CLUTTER_BOX_CHILD (gobject);
switch (prop_id)
{
case PROP_CHILD_X_ALIGN:
g_value_set_enum (value, self->x_align);
break;
case PROP_CHILD_Y_ALIGN:
g_value_set_enum (value, self->y_align);
break;
case PROP_CHILD_X_FILL:
g_value_set_boolean (value, self->x_fill);
break;
case PROP_CHILD_Y_FILL:
g_value_set_boolean (value, self->y_fill);
break;
case PROP_CHILD_EXPAND:
g_value_set_boolean (value, self->expand);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_child_class_init (ClutterBoxChildClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
gobject_class->set_property = clutter_box_child_set_property;
gobject_class->get_property = clutter_box_child_get_property;
pspec = g_param_spec_boolean ("expand",
P_("Expand"),
P_("Allocate extra space for the child"),
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CHILD_EXPAND, pspec);
pspec = g_param_spec_boolean ("x-fill",
P_("Horizontal Fill"),
P_("Whether the child should receive priority "
"when the container is allocating spare space "
"on the horizontal axis"),
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CHILD_X_FILL, pspec);
pspec = g_param_spec_boolean ("y-fill",
P_("Vertical Fill"),
P_("Whether the child should receive priority "
"when the container is allocating spare space "
"on the vertical axis"),
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CHILD_Y_FILL, pspec);
pspec = g_param_spec_enum ("x-align",
P_("Horizontal Alignment"),
P_("Horizontal alignment of the actor within "
"the cell"),
CLUTTER_TYPE_BOX_ALIGNMENT,
CLUTTER_BOX_ALIGNMENT_CENTER,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CHILD_X_ALIGN, pspec);
pspec = g_param_spec_enum ("y-align",
P_("Vertical Alignment"),
P_("Vertical alignment of the actor within "
"the cell"),
CLUTTER_TYPE_BOX_ALIGNMENT,
CLUTTER_BOX_ALIGNMENT_CENTER,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_CHILD_Y_ALIGN, pspec);
}
static void
clutter_box_child_init (ClutterBoxChild *self)
{
self->x_align = CLUTTER_BOX_ALIGNMENT_CENTER;
self->y_align = CLUTTER_BOX_ALIGNMENT_CENTER;
self->x_fill = self->y_fill = FALSE;
self->expand = FALSE;
self->has_last_allocation = FALSE;
}
static gdouble
get_box_alignment_factor (ClutterBoxAlignment alignment)
{
switch (alignment)
{
case CLUTTER_BOX_ALIGNMENT_CENTER:
return 0.5;
case CLUTTER_BOX_ALIGNMENT_START:
return 0.0;
case CLUTTER_BOX_ALIGNMENT_END:
return 1.0;
}
return 0.0;
}
static GType
clutter_box_layout_get_child_meta_type (ClutterLayoutManager *manager)
{
return CLUTTER_TYPE_BOX_CHILD;
}
static void
clutter_box_layout_set_container (ClutterLayoutManager *layout,
ClutterContainer *container)
{
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (layout)->priv;
ClutterLayoutManagerClass *parent_class;
priv->container = container;
if (priv->container != NULL)
{
ClutterRequestMode request_mode;
/* we need to change the :request-mode of the container
* to match the orientation
*/
request_mode = priv->is_vertical
? CLUTTER_REQUEST_HEIGHT_FOR_WIDTH
: CLUTTER_REQUEST_WIDTH_FOR_HEIGHT;
clutter_actor_set_request_mode (CLUTTER_ACTOR (priv->container),
request_mode);
}
parent_class = CLUTTER_LAYOUT_MANAGER_CLASS (clutter_box_layout_parent_class);
parent_class->set_container (layout, container);
}
static void
get_preferred_width (ClutterBoxLayout *self,
ClutterActor *container,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
ClutterBoxLayoutPrivate *priv = self->priv;
ClutterActor *child;
gint n_children = 0;
gboolean is_rtl;
if (min_width_p)
*min_width_p = 0;
if (natural_width_p)
*natural_width_p = 0;
if (!priv->is_vertical)
{
ClutterTextDirection text_dir;
text_dir = clutter_actor_get_text_direction (container);
is_rtl = (text_dir == CLUTTER_TEXT_DIRECTION_RTL) ? TRUE : FALSE;
}
else
is_rtl = FALSE;
for (child = (is_rtl) ? clutter_actor_get_last_child (container)
: clutter_actor_get_first_child (container);
child != NULL;
child = (is_rtl) ? clutter_actor_get_previous_sibling (child)
: clutter_actor_get_next_sibling (child))
{
gfloat child_min = 0, child_nat = 0;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
n_children++;
clutter_actor_get_preferred_width (child,
(!priv->is_vertical)
? for_height
: -1,
&child_min,
&child_nat);
if (priv->is_vertical)
{
if (min_width_p)
*min_width_p = MAX (child_min, *min_width_p);
if (natural_width_p)
*natural_width_p = MAX (child_nat, *natural_width_p);
}
else
{
if (min_width_p)
*min_width_p += child_min;
if (natural_width_p)
*natural_width_p += child_nat;
}
}
if (!priv->is_vertical && n_children > 1)
{
if (min_width_p)
*min_width_p += priv->spacing * (n_children - 1);
if (natural_width_p)
*natural_width_p += priv->spacing * (n_children - 1);
}
}
static void
get_preferred_height (ClutterBoxLayout *self,
ClutterActor *container,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
ClutterBoxLayoutPrivate *priv = self->priv;
ClutterActor *child;
gint n_children = 0;
gboolean is_rtl;
if (min_height_p)
*min_height_p = 0;
if (natural_height_p)
*natural_height_p = 0;
if (!priv->is_vertical)
{
ClutterTextDirection text_dir;
text_dir = clutter_actor_get_text_direction (container);
is_rtl = (text_dir == CLUTTER_TEXT_DIRECTION_RTL) ? TRUE : FALSE;
}
else
is_rtl = FALSE;
for (child = (is_rtl) ? clutter_actor_get_last_child (container)
: clutter_actor_get_first_child (container);
child != NULL;
child = (is_rtl) ? clutter_actor_get_previous_sibling (child)
: clutter_actor_get_next_sibling (child))
{
gfloat child_min = 0, child_nat = 0;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
n_children++;
clutter_actor_get_preferred_height (child,
(priv->is_vertical)
? for_width
: -1,
&child_min,
&child_nat);
if (!priv->is_vertical)
{
if (min_height_p)
*min_height_p = MAX (child_min, *min_height_p);
if (natural_height_p)
*natural_height_p = MAX (child_nat, *natural_height_p);
}
else
{
if (min_height_p)
*min_height_p += child_min;
if (natural_height_p)
*natural_height_p += child_nat;
}
}
if (priv->is_vertical && n_children > 1)
{
if (min_height_p)
*min_height_p += priv->spacing * (n_children - 1);
if (natural_height_p)
*natural_height_p += priv->spacing * (n_children - 1);
}
}
static void
allocate_box_child (ClutterBoxLayout *self,
ClutterContainer *container,
ClutterActor *child,
ClutterActorBox *child_box,
ClutterAllocationFlags flags)
{
ClutterBoxLayoutPrivate *priv = self->priv;
ClutterBoxChild *box_child;
ClutterLayoutMeta *meta;
ClutterActorBox final_child_box;
meta = clutter_layout_manager_get_child_meta (CLUTTER_LAYOUT_MANAGER (self),
container,
child);
box_child = CLUTTER_BOX_CHILD (meta);
CLUTTER_NOTE (LAYOUT, "Allocation for %s { %.2f, %.2f, %.2f, %.2f }",
_clutter_actor_get_debug_name (child),
child_box->x1, child_box->y1,
child_box->x2 - child_box->x1,
child_box->y2 - child_box->y1);
clutter_actor_allocate_align_fill (child, child_box,
get_box_alignment_factor (box_child->x_align),
get_box_alignment_factor (box_child->y_align),
box_child->x_fill,
box_child->y_fill,
flags);
/* retrieve the allocation computed and set by allocate_align_fill();
* since we call this *after* allocate(), it's just a cheap copy
*/
clutter_actor_get_allocation_box (child, &final_child_box);
if (priv->use_animations && priv->is_animating)
{
ClutterLayoutManager *manager = CLUTTER_LAYOUT_MANAGER (self);
ClutterActorBox *start, end;
gdouble p;
p = clutter_layout_manager_get_animation_progress (manager);
if (!box_child->has_last_allocation)
{
/* if there is no allocation available then the child has just
* been added to the container; we put it in the final state
* and store its allocation for later
*/
box_child->last_allocation = final_child_box;
box_child->has_last_allocation = TRUE;
return;
}
start = &box_child->last_allocation;
end = final_child_box;
/* interpolate between the initial and final values */
clutter_actor_box_interpolate (start, &end, p, &final_child_box);
CLUTTER_NOTE (ANIMATION,
"Animate { %.1f, %.1f, %.1f, %.1f }\t"
"%.3f * { %.1f, %.1f, %.1f, %.1f }\t"
"-> { %.1f, %.1f, %.1f, %.1f }",
start->x1, start->y1,
start->x2, start->y2,
p,
final_child_box.x1, final_child_box.y1,
final_child_box.x2, final_child_box.y2,
end.x1, end.y1,
end.x2, end.y2);
clutter_actor_allocate (child, &final_child_box, flags);
}
else
{
/* store the allocation for later animations */
box_child->last_allocation = final_child_box;
box_child->has_last_allocation = TRUE;
return;
}
}
static void
clutter_box_layout_get_preferred_width (ClutterLayoutManager *layout,
ClutterContainer *container,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
get_preferred_width (self, CLUTTER_ACTOR (container), for_height,
min_width_p,
natural_width_p);
}
static void
clutter_box_layout_get_preferred_height (ClutterLayoutManager *layout,
ClutterContainer *container,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
get_preferred_height (self, CLUTTER_ACTOR (container), for_width,
min_height_p,
natural_height_p);
}
static void
count_expand_children (ClutterLayoutManager *layout,
ClutterContainer *container,
gint *visible_children,
gint *expand_children)
{
ClutterActor *actor, *child;
ClutterActorIter iter;
actor = CLUTTER_ACTOR (container);
*visible_children = *expand_children = 0;
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
if (CLUTTER_ACTOR_IS_VISIBLE (child))
{
ClutterLayoutMeta *meta;
*visible_children += 1;
meta = clutter_layout_manager_get_child_meta (layout,
container,
child);
if (CLUTTER_BOX_CHILD (meta)->expand)
*expand_children += 1;
}
}
}
typedef struct _RequestedSize
{
ClutterActor *actor;
gfloat minimum_size;
gfloat natural_size;
} RequestedSize;
/* Pulled from gtksizerequest.c from Gtk+ */
static gint
compare_gap (gconstpointer p1,
gconstpointer p2,
gpointer data)
{
RequestedSize *sizes = data;
const guint *c1 = p1;
const guint *c2 = p2;
const gint d1 = MAX (sizes[*c1].natural_size -
sizes[*c1].minimum_size,
0);
const gint d2 = MAX (sizes[*c2].natural_size -
sizes[*c2].minimum_size,
0);
gint delta = (d2 - d1);
if (0 == delta)
delta = (*c2 - *c1);
return delta;
}
/*
* distribute_natural_allocation:
* @extra_space: Extra space to redistribute among children after subtracting
* minimum sizes and any child padding from the overall allocation
* @n_requested_sizes: Number of requests to fit into the allocation
* @sizes: An array of structs with a client pointer and a minimum/natural size
* in the orientation of the allocation.
*
* Distributes @extra_space to child @sizes by bringing smaller
* children up to natural size first.
*
* The remaining space will be added to the @minimum_size member of the
* RequestedSize struct. If all sizes reach their natural size then
* the remaining space is returned.
*
* Returns: The remainder of @extra_space after redistributing space
* to @sizes.
*
* Pulled from gtksizerequest.c from Gtk+
*/
static gint
distribute_natural_allocation (gint extra_space,
guint n_requested_sizes,
RequestedSize *sizes)
{
guint *spreading;
gint i;
g_return_val_if_fail (extra_space >= 0, 0);
spreading = g_newa (guint, n_requested_sizes);
for (i = 0; i < n_requested_sizes; i++)
spreading[i] = i;
/* Distribute the container's extra space c_gap. We want to assign
* this space such that the sum of extra space assigned to children
* (c^i_gap) is equal to c_cap. The case that there's not enough
* space for all children to take their natural size needs some
* attention. The goals we want to achieve are:
*
* a) Maximize number of children taking their natural size.
* b) The allocated size of children should be a continuous
* function of c_gap. That is, increasing the container size by
* one pixel should never make drastic changes in the distribution.
* c) If child i takes its natural size and child j doesn't,
* child j should have received at least as much gap as child i.
*
* The following code distributes the additional space by following
* these rules.
*/
/* Sort descending by gap and position. */
g_qsort_with_data (spreading,
n_requested_sizes, sizeof (guint),
compare_gap, sizes);
/* Distribute available space.
* This master piece of a loop was conceived by Behdad Esfahbod.
*/
for (i = n_requested_sizes - 1; extra_space > 0 && i >= 0; --i)
{
/* Divide remaining space by number of remaining children.
* Sort order and reducing remaining space by assigned space
* ensures that space is distributed equally.
*/
gint glue = (extra_space + i) / (i + 1);
gint gap = sizes[(spreading[i])].natural_size
- sizes[(spreading[i])].minimum_size;
gint extra = MIN (glue, gap);
sizes[spreading[i]].minimum_size += extra;
extra_space -= extra;
}
return extra_space;
}
/* Pulled from gtkbox.c from Gtk+ */
static void
clutter_box_layout_allocate (ClutterLayoutManager *layout,
ClutterContainer *container,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (layout)->priv;
ClutterActor *actor, *child;
gint nvis_children;
gint nexpand_children;
gboolean is_rtl;
ClutterActorIter iter;
ClutterActorBox child_allocation;
RequestedSize *sizes;
gint size;
gint extra;
gint n_extra_widgets = 0; /* Number of widgets that receive 1 extra px */
gint x = 0, y = 0, i;
gint child_size;
count_expand_children (layout, container, &nvis_children, &nexpand_children);
CLUTTER_NOTE (LAYOUT, "BoxLayout for %s: visible=%d, expand=%d",
_clutter_actor_get_debug_name (CLUTTER_ACTOR (container)),
nvis_children,
nexpand_children);
/* If there is no visible child, simply return. */
if (nvis_children <= 0)
return;
sizes = g_newa (RequestedSize, nvis_children);
if (priv->is_vertical)
size = box->y2 - box->y1 - (nvis_children - 1) * priv->spacing;
else
size = box->x2 - box->x1 - (nvis_children - 1) * priv->spacing;
actor = CLUTTER_ACTOR (container);
/* Retrieve desired size for visible children. */
i = 0;
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
if (priv->is_vertical)
clutter_actor_get_preferred_height (child,
box->x2 - box->x1,
&sizes[i].minimum_size,
&sizes[i].natural_size);
else
clutter_actor_get_preferred_width (child,
box->y2 - box->y1,
&sizes[i].minimum_size,
&sizes[i].natural_size);
/* Assert the api is working properly */
if (sizes[i].minimum_size < 0)
g_error ("ClutterBoxLayout child %s minimum %s: %f < 0 for %s %f",
_clutter_actor_get_debug_name (child),
priv->is_vertical ? "height" : "width",
sizes[i].minimum_size,
priv->is_vertical ? "width" : "height",
priv->is_vertical ? box->x2 - box->x1 : box->y2 - box->y1);
if (sizes[i].natural_size < sizes[i].minimum_size)
g_error ("ClutterBoxLayout child %s natural %s: %f < minimum %f for %s %f",
_clutter_actor_get_debug_name (child),
priv->is_vertical ? "height" : "width",
sizes[i].natural_size,
sizes[i].minimum_size,
priv->is_vertical ? "width" : "height",
priv->is_vertical ? box->x2 - box->x1 : box->y2 - box->y1);
size -= sizes[i].minimum_size;
sizes[i].actor = child;
i += 1;
}
if (priv->is_homogeneous)
{
/* If were homogenous we still need to run the above loop to get the
* minimum sizes for children that are not going to fill
*/
if (priv->is_vertical)
size = box->y2 - box->y1 - (nvis_children - 1) * priv->spacing;
else
size = box->x2 - box->x1 - (nvis_children - 1) * priv->spacing;
extra = size / nvis_children;
n_extra_widgets = size % nvis_children;
}
else
{
/* Bring children up to size first */
size = distribute_natural_allocation (MAX (0, size), nvis_children, sizes);
/* Calculate space which hasn't distributed yet,
* and is available for expanding children.
*/
if (nexpand_children > 0)
{
extra = size / nexpand_children;
n_extra_widgets = size % nexpand_children;
}
else
extra = 0;
}
if (!priv->is_vertical)
{
ClutterTextDirection text_dir;
text_dir = clutter_actor_get_text_direction (CLUTTER_ACTOR (container));
is_rtl = (text_dir == CLUTTER_TEXT_DIRECTION_RTL) ? TRUE : FALSE;
}
else
is_rtl = FALSE;
/* Allocate child positions. */
if (priv->is_vertical)
{
child_allocation.x1 = box->x1;
child_allocation.x2 = MAX (1.0, box->x2 - box->x1);
if (priv->is_pack_start)
y = box->y2 - box->y1;
else
y = box->y1;
}
else
{
child_allocation.y1 = box->y1;
child_allocation.y2 = MAX (1.0, box->y2 - box->y1);
if (priv->is_pack_start)
x = box->x2 - box->x1;
else
x = box->x1;
}
i = 0;
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
ClutterLayoutMeta *meta;
ClutterBoxChild *box_child;
/* If widget is not visible, skip it. */
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
meta = clutter_layout_manager_get_child_meta (layout,
container,
child);
box_child = CLUTTER_BOX_CHILD (meta);
/* Assign the child's size. */
if (priv->is_homogeneous)
{
child_size = extra;
if (n_extra_widgets > 0)
{
child_size++;
n_extra_widgets--;
}
}
else
{
child_size = sizes[i].minimum_size;
if (box_child->expand)
{
child_size += extra;
if (n_extra_widgets > 0)
{
child_size++;
n_extra_widgets--;
}
}
}
/* Assign the child's position. */
if (priv->is_vertical)
{
if (box_child->y_fill)
{
child_allocation.y1 = y;
child_allocation.y2 = child_allocation.y1 + MAX (1.0, child_size);
}
else
{
child_allocation.y1 = y + (child_size - sizes[i].minimum_size) / 2;
child_allocation.y2 = child_allocation.y1 + sizes[i].minimum_size;
}
if (priv->is_pack_start)
{
y -= child_size + priv->spacing;
child_allocation.y1 -= child_size;
child_allocation.y2 -= child_size;
}
else
{
y += child_size + priv->spacing;
}
}
else /* !priv->is_vertical */
{
if (box_child->x_fill)
{
child_allocation.x1 = x;
child_allocation.x2 = child_allocation.x1 + MAX (1.0, child_size);
}
else
{
child_allocation.x1 = x + (child_size - sizes[i].minimum_size) / 2;
child_allocation.x2 = child_allocation.x1 + sizes[i].minimum_size;
}
if (priv->is_pack_start)
{
x -= child_size + priv->spacing;
child_allocation.x1 -= child_size;
child_allocation.x2 -= child_size;
}
else
{
x += child_size + priv->spacing;
}
if (is_rtl)
{
gfloat width = child_allocation.x2 - child_allocation.x1;
child_allocation.x1 = box->x2 - box->x1
- child_allocation.x1
- (child_allocation.x2 - child_allocation.x1);
child_allocation.x2 = child_allocation.x1 + width;
}
}
allocate_box_child (CLUTTER_BOX_LAYOUT (layout),
container,
child,
&child_allocation,
flags);
i += 1;
}
}
static ClutterAlpha *
clutter_box_layout_begin_animation (ClutterLayoutManager *manager,
guint duration,
gulong easing)
{
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (manager)->priv;
ClutterLayoutManagerClass *parent_class;
priv->is_animating = TRUE;
/* we want the default implementation */
parent_class = CLUTTER_LAYOUT_MANAGER_CLASS (clutter_box_layout_parent_class);
return parent_class->begin_animation (manager, duration, easing);
}
static void
clutter_box_layout_end_animation (ClutterLayoutManager *manager)
{
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (manager)->priv;
ClutterLayoutManagerClass *parent_class;
priv->is_animating = FALSE;
/* we want the default implementation */
parent_class = CLUTTER_LAYOUT_MANAGER_CLASS (clutter_box_layout_parent_class);
parent_class->end_animation (manager);
}
static void
clutter_box_layout_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (gobject);
switch (prop_id)
{
case PROP_VERTICAL:
clutter_box_layout_set_vertical (self, g_value_get_boolean (value));
break;
case PROP_HOMOGENEOUS:
clutter_box_layout_set_homogeneous (self, g_value_get_boolean (value));
break;
case PROP_SPACING:
clutter_box_layout_set_spacing (self, g_value_get_uint (value));
break;
case PROP_PACK_START:
clutter_box_layout_set_pack_start (self, g_value_get_boolean (value));
break;
case PROP_USE_ANIMATIONS:
clutter_box_layout_set_use_animations (self, g_value_get_boolean (value));
break;
case PROP_EASING_MODE:
clutter_box_layout_set_easing_mode (self, g_value_get_ulong (value));
break;
case PROP_EASING_DURATION:
clutter_box_layout_set_easing_duration (self, g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_layout_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (gobject)->priv;
switch (prop_id)
{
case PROP_VERTICAL:
g_value_set_boolean (value, priv->is_vertical);
break;
case PROP_HOMOGENEOUS:
g_value_set_boolean (value, priv->is_homogeneous);
break;
case PROP_SPACING:
g_value_set_uint (value, priv->spacing);
break;
case PROP_PACK_START:
g_value_set_boolean (value, priv->is_pack_start);
break;
case PROP_USE_ANIMATIONS:
g_value_set_boolean (value, priv->use_animations);
break;
case PROP_EASING_MODE:
g_value_set_ulong (value, priv->easing_mode);
break;
case PROP_EASING_DURATION:
g_value_set_uint (value, priv->easing_duration);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_layout_class_init (ClutterBoxLayoutClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterLayoutManagerClass *layout_class;
layout_class = CLUTTER_LAYOUT_MANAGER_CLASS (klass);
layout_class->get_preferred_width = clutter_box_layout_get_preferred_width;
layout_class->get_preferred_height = clutter_box_layout_get_preferred_height;
layout_class->allocate = clutter_box_layout_allocate;
layout_class->set_container = clutter_box_layout_set_container;
layout_class->get_child_meta_type = clutter_box_layout_get_child_meta_type;
layout_class->begin_animation = clutter_box_layout_begin_animation;
layout_class->end_animation = clutter_box_layout_end_animation;
g_type_class_add_private (klass, sizeof (ClutterBoxLayoutPrivate));
/**
* ClutterBoxLayout:vertical:
*
* Whether the #ClutterBoxLayout should arrange its children
* alongside the Y axis, instead of alongside the X axis
*
* Since: 1.2
*/
obj_props[PROP_VERTICAL] =
g_param_spec_boolean ("vertical",
P_("Vertical"),
P_("Whether the layout should be vertical, "
"rather than horizontal"),
FALSE,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBoxLayout:homogeneous:
*
* Whether the #ClutterBoxLayout should arrange its children
* homogeneously, i.e. all childs get the same size
*
* Since: 1.4
*/
obj_props[PROP_HOMOGENEOUS] =
g_param_spec_boolean ("homogeneous",
P_("Homogeneous"),
P_("Whether the layout should be homogeneous, "
"i.e. all childs get the same size"),
FALSE,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBoxLayout:pack-start:
*
* Whether the #ClutterBoxLayout should pack items at the start
* or append them at the end
*
* Since: 1.2
*/
obj_props[PROP_PACK_START] =
g_param_spec_boolean ("pack-start",
P_("Pack Start"),
P_("Whether to pack items at the start of the box"),
FALSE,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBoxLayout:spacing:
*
* The spacing between children of the #ClutterBoxLayout, in pixels
*
* Since: 1.2
*/
obj_props[PROP_SPACING] =
g_param_spec_uint ("spacing",
P_("Spacing"),
P_("Spacing between children"),
0, G_MAXUINT, 0,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBoxLayout:use-animations:
*
* Whether the #ClutterBoxLayout should animate changes in the
* layout properties
*
* Since: 1.2
*/
obj_props[PROP_USE_ANIMATIONS] =
g_param_spec_boolean ("use-animations",
P_("Use Animations"),
P_("Whether layout changes should be animated"),
FALSE,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBoxLayout:easing-mode:
*
* The easing mode for the animations, in case
* #ClutterBoxLayout:use-animations is set to %TRUE
*
* The easing mode has the same semantics of #ClutterAnimation:mode: it can
* either be a value from the #ClutterAnimationMode enumeration, like
* %CLUTTER_EASE_OUT_CUBIC, or a logical id as returned by
* clutter_alpha_register_func()
*
* The default value is %CLUTTER_EASE_OUT_CUBIC
*
* Since: 1.2
*/
obj_props[PROP_EASING_MODE] =
g_param_spec_ulong ("easing-mode",
P_("Easing Mode"),
P_("The easing mode of the animations"),
0, G_MAXULONG,
CLUTTER_EASE_OUT_CUBIC,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBoxLayout:easing-duration:
*
* The duration of the animations, in case #ClutterBoxLayout:use-animations
* is set to %TRUE
*
* The duration is expressed in milliseconds
*
* Since: 1.2
*/
obj_props[PROP_EASING_DURATION] =
g_param_spec_uint ("easing-duration",
P_("Easing Duration"),
P_("The duration of the animations"),
0, G_MAXUINT,
500,
CLUTTER_PARAM_READWRITE);
gobject_class->set_property = clutter_box_layout_set_property;
gobject_class->get_property = clutter_box_layout_get_property;
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
}
static void
clutter_box_layout_init (ClutterBoxLayout *layout)
{
ClutterBoxLayoutPrivate *priv;
layout->priv = priv = CLUTTER_BOX_LAYOUT_GET_PRIVATE (layout);
priv->is_vertical = FALSE;
priv->is_homogeneous = FALSE;
priv->is_pack_start = FALSE;
priv->spacing = 0;
priv->use_animations = FALSE;
priv->easing_mode = CLUTTER_EASE_OUT_CUBIC;
priv->easing_duration = 500;
}
/**
* clutter_box_layout_new:
*
* Creates a new #ClutterBoxLayout layout manager
*
* Return value: the newly created #ClutterBoxLayout
*
* Since: 1.2
*/
ClutterLayoutManager *
clutter_box_layout_new (void)
{
return g_object_new (CLUTTER_TYPE_BOX_LAYOUT, NULL);
}
/**
* clutter_box_layout_set_spacing:
* @layout: a #ClutterBoxLayout
* @spacing: the spacing between children of the layout, in pixels
*
* Sets the spacing between children of @layout
*
* Since: 1.2
*/
void
clutter_box_layout_set_spacing (ClutterBoxLayout *layout,
guint spacing)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->spacing != spacing)
{
ClutterLayoutManager *manager;
priv->spacing = spacing;
manager = CLUTTER_LAYOUT_MANAGER (layout);
if (priv->use_animations)
{
clutter_layout_manager_begin_animation (manager,
priv->easing_duration,
priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (layout), "spacing");
}
}
/**
* clutter_box_layout_get_spacing:
* @layout: a #ClutterBoxLayout
*
* Retrieves the spacing set using clutter_box_layout_set_spacing()
*
* Return value: the spacing between children of the #ClutterBoxLayout
*
* Since: 1.2
*/
guint
clutter_box_layout_get_spacing (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), 0);
return layout->priv->spacing;
}
/**
* clutter_box_layout_set_vertical:
* @layout: a #ClutterBoxLayout
* @vertical: %TRUE if the layout should be vertical
*
* Sets whether @layout should arrange its children vertically alongside
* the Y axis, instead of horizontally alongside the X axis
*
* Since: 1.2
*/
void
clutter_box_layout_set_vertical (ClutterBoxLayout *layout,
gboolean vertical)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->is_vertical != vertical)
{
ClutterLayoutManager *manager;
priv->is_vertical = vertical ? TRUE : FALSE;
manager = CLUTTER_LAYOUT_MANAGER (layout);
if (priv->use_animations)
{
clutter_layout_manager_begin_animation (manager,
priv->easing_duration,
priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (layout), "vertical");
}
}
/**
* clutter_box_layout_get_vertical:
* @layout: a #ClutterBoxLayout
*
* Retrieves the orientation of the @layout as set using the
* clutter_box_layout_set_vertical() function
*
* Return value: %TRUE if the #ClutterBoxLayout is arranging its children
* vertically, and %FALSE otherwise
*
* Since: 1.2
*/
gboolean
clutter_box_layout_get_vertical (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), FALSE);
return layout->priv->is_vertical;
}
/**
* clutter_box_layout_set_homogeneous:
* @layout: a #ClutterBoxLayout
* @homogeneous: %TRUE if the layout should be homogeneous
*
* Sets whether the size of @layout children should be
* homogeneous
*
* Since: 1.4
*/
void
clutter_box_layout_set_homogeneous (ClutterBoxLayout *layout,
gboolean homogeneous)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->is_homogeneous != homogeneous)
{
ClutterLayoutManager *manager;
priv->is_homogeneous = !!homogeneous;
manager = CLUTTER_LAYOUT_MANAGER (layout);
if (priv->use_animations)
{
clutter_layout_manager_begin_animation (manager,
priv->easing_duration,
priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (layout), "homogeneous");
}
}
/**
* clutter_box_layout_get_homogeneous:
* @layout: a #ClutterBoxLayout
*
* Retrieves if the children sizes are allocated homogeneously.
*
* Return value: %TRUE if the #ClutterBoxLayout is arranging its children
* homogeneously, and %FALSE otherwise
*
* Since: 1.4
*/
gboolean
clutter_box_layout_get_homogeneous (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), FALSE);
return layout->priv->is_homogeneous;
}
/**
* clutter_box_layout_set_pack_start:
* @layout: a #ClutterBoxLayout
* @pack_start: %TRUE if the @layout should pack children at the
* beginning of the layout
*
* Sets whether children of @layout should be layed out by appending
* them or by prepending them
*
* Since: 1.2
*/
void
clutter_box_layout_set_pack_start (ClutterBoxLayout *layout,
gboolean pack_start)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->is_pack_start != pack_start)
{
ClutterLayoutManager *manager;
priv->is_pack_start = pack_start ? TRUE : FALSE;
manager = CLUTTER_LAYOUT_MANAGER (layout);
if (priv->use_animations)
{
clutter_layout_manager_begin_animation (manager,
priv->easing_duration,
priv->easing_mode);
}
else
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (layout), "pack-start");
}
}
/**
* clutter_box_layout_get_pack_start:
* @layout: a #ClutterBoxLayout
*
* Retrieves the value set using clutter_box_layout_set_pack_start()
*
* Return value: %TRUE if the #ClutterBoxLayout should pack children
* at the beginning of the layout, and %FALSE otherwise
*
* Since: 1.2
*/
gboolean
clutter_box_layout_get_pack_start (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), FALSE);
return layout->priv->is_pack_start;
}
/**
* clutter_box_layout_pack:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor
* @expand: whether the @actor should expand
* @x_fill: whether the @actor should fill horizontally
* @y_fill: whether the @actor should fill vertically
* @x_align: the horizontal alignment policy for @actor
* @y_align: the vertical alignment policy for @actor
*
* Packs @actor inside the #ClutterContainer associated to @layout
* and sets the layout properties
*
* Since: 1.2
*/
void
clutter_box_layout_pack (ClutterBoxLayout *layout,
ClutterActor *actor,
gboolean expand,
gboolean x_fill,
gboolean y_fill,
ClutterBoxAlignment x_align,
ClutterBoxAlignment y_align)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before adding children",
G_OBJECT_TYPE_NAME (layout));
return;
}
clutter_container_add_actor (priv->container, actor);
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
g_assert (CLUTTER_IS_BOX_CHILD (meta));
box_child_set_align (CLUTTER_BOX_CHILD (meta), x_align, y_align);
box_child_set_fill (CLUTTER_BOX_CHILD (meta), x_fill, y_fill);
box_child_set_expand (CLUTTER_BOX_CHILD (meta), expand);
}
/**
* clutter_box_layout_set_alignment:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor child of @layout
* @x_align: Horizontal alignment policy for @actor
* @y_align: Vertical alignment policy for @actor
*
* Sets the horizontal and vertical alignment policies for @actor
* inside @layout
*
* Since: 1.2
*/
void
clutter_box_layout_set_alignment (ClutterBoxLayout *layout,
ClutterActor *actor,
ClutterBoxAlignment x_align,
ClutterBoxAlignment y_align)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before querying layout "
"properties",
G_OBJECT_TYPE_NAME (layout));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
if (meta == NULL)
{
g_warning ("No layout meta found for the child of type '%s' "
"inside the layout manager of type '%s'",
G_OBJECT_TYPE_NAME (actor),
G_OBJECT_TYPE_NAME (manager));
return;
}
g_assert (CLUTTER_IS_BOX_CHILD (meta));
box_child_set_align (CLUTTER_BOX_CHILD (meta), x_align, y_align);
}
/**
* clutter_box_layout_get_alignment:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor child of @layout
* @x_align: (out): return location for the horizontal alignment policy
* @y_align: (out): return location for the vertical alignment policy
*
* Retrieves the horizontal and vertical alignment policies for @actor
* as set using clutter_box_layout_pack() or clutter_box_layout_set_alignment()
*
* Since: 1.2
*/
void
clutter_box_layout_get_alignment (ClutterBoxLayout *layout,
ClutterActor *actor,
ClutterBoxAlignment *x_align,
ClutterBoxAlignment *y_align)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before querying layout "
"properties",
G_OBJECT_TYPE_NAME (layout));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
if (meta == NULL)
{
g_warning ("No layout meta found for the child of type '%s' "
"inside the layout manager of type '%s'",
G_OBJECT_TYPE_NAME (actor),
G_OBJECT_TYPE_NAME (manager));
return;
}
g_assert (CLUTTER_IS_BOX_CHILD (meta));
if (x_align)
*x_align = CLUTTER_BOX_CHILD (meta)->x_align;
if (y_align)
*y_align = CLUTTER_BOX_CHILD (meta)->y_align;
}
/**
* clutter_box_layout_set_fill:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor child of @layout
* @x_fill: whether @actor should fill horizontally the allocated space
* @y_fill: whether @actor should fill vertically the allocated space
*
* Sets the horizontal and vertical fill policies for @actor
* inside @layout
*
* Since: 1.2
*/
void
clutter_box_layout_set_fill (ClutterBoxLayout *layout,
ClutterActor *actor,
gboolean x_fill,
gboolean y_fill)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before querying layout "
"properties",
G_OBJECT_TYPE_NAME (layout));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
if (meta == NULL)
{
g_warning ("No layout meta found for the child of type '%s' "
"inside the layout manager of type '%s'",
G_OBJECT_TYPE_NAME (actor),
G_OBJECT_TYPE_NAME (manager));
return;
}
g_assert (CLUTTER_IS_BOX_CHILD (meta));
box_child_set_fill (CLUTTER_BOX_CHILD (meta), x_fill, y_fill);
}
/**
* clutter_box_layout_get_fill:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor child of @layout
* @x_fill: (out): return location for the horizontal fill policy
* @y_fill: (out): return location for the vertical fill policy
*
* Retrieves the horizontal and vertical fill policies for @actor
* as set using clutter_box_layout_pack() or clutter_box_layout_set_fill()
*
* Since: 1.2
*/
void
clutter_box_layout_get_fill (ClutterBoxLayout *layout,
ClutterActor *actor,
gboolean *x_fill,
gboolean *y_fill)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before querying layout "
"properties",
G_OBJECT_TYPE_NAME (layout));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
if (meta == NULL)
{
g_warning ("No layout meta found for the child of type '%s' "
"inside the layout manager of type '%s'",
G_OBJECT_TYPE_NAME (actor),
G_OBJECT_TYPE_NAME (manager));
return;
}
g_assert (CLUTTER_IS_BOX_CHILD (meta));
if (x_fill)
*x_fill = CLUTTER_BOX_CHILD (meta)->x_fill;
if (y_fill)
*y_fill = CLUTTER_BOX_CHILD (meta)->y_fill;
}
/**
* clutter_box_layout_set_expand:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor child of @layout
* @expand: whether @actor should expand
*
* Sets whether @actor should expand inside @layout
*
* Since: 1.2
*/
void
clutter_box_layout_set_expand (ClutterBoxLayout *layout,
ClutterActor *actor,
gboolean expand)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before querying layout "
"properties",
G_OBJECT_TYPE_NAME (layout));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
if (meta == NULL)
{
g_warning ("No layout meta found for the child of type '%s' "
"inside the layout manager of type '%s'",
G_OBJECT_TYPE_NAME (actor),
G_OBJECT_TYPE_NAME (manager));
return;
}
g_assert (CLUTTER_IS_BOX_CHILD (meta));
box_child_set_expand (CLUTTER_BOX_CHILD (meta), expand);
}
/**
* clutter_box_layout_get_expand:
* @layout: a #ClutterBoxLayout
* @actor: a #ClutterActor child of @layout
*
* Retrieves whether @actor should expand inside @layout
*
* Return value: %TRUE if the #ClutterActor should expand, %FALSE otherwise
*
* Since: 1.2
*/
gboolean
clutter_box_layout_get_expand (ClutterBoxLayout *layout,
ClutterActor *actor)
{
ClutterBoxLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), FALSE);
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE);
priv = layout->priv;
if (priv->container == NULL)
{
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before querying layout "
"properties",
G_OBJECT_TYPE_NAME (layout));
return FALSE;
}
manager = CLUTTER_LAYOUT_MANAGER (layout);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
actor);
if (meta == NULL)
{
g_warning ("No layout meta found for the child of type '%s' "
"inside the layout manager of type '%s'",
G_OBJECT_TYPE_NAME (actor),
G_OBJECT_TYPE_NAME (manager));
return FALSE;
}
g_assert (CLUTTER_IS_BOX_CHILD (meta));
return CLUTTER_BOX_CHILD (meta)->expand;
}
/**
* clutter_box_layout_set_use_animations:
* @layout: a #ClutterBoxLayout
* @animate: %TRUE if the @layout should use animations
*
* Sets whether @layout should animate changes in the layout properties
*
* The duration of the animations is controlled by
* clutter_box_layout_set_easing_duration(); the easing mode to be used
* by the animations is controlled by clutter_box_layout_set_easing_mode()
*
* Since: 1.2
*/
void
clutter_box_layout_set_use_animations (ClutterBoxLayout *layout,
gboolean animate)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->use_animations != animate)
{
priv->use_animations = animate;
g_object_notify (G_OBJECT (layout), "use-animations");
}
}
/**
* clutter_box_layout_get_use_animations:
* @layout: a #ClutterBoxLayout
*
* Retrieves whether @layout should animate changes in the layout properties
*
* Since clutter_box_layout_set_use_animations()
*
* Return value: %TRUE if the animations should be used, %FALSE otherwise
*
* Since: 1.2
*/
gboolean
clutter_box_layout_get_use_animations (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), FALSE);
return layout->priv->use_animations;
}
/**
* clutter_box_layout_set_easing_mode:
* @layout: a #ClutterBoxLayout
* @mode: an easing mode, either from #ClutterAnimationMode or a logical id
* from clutter_alpha_register_func()
*
* Sets the easing mode to be used by @layout when animating changes in layout
* properties
*
* Use clutter_box_layout_set_use_animations() to enable and disable the
* animations
*
* Since: 1.2
*/
void
clutter_box_layout_set_easing_mode (ClutterBoxLayout *layout,
gulong mode)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->easing_mode != mode)
{
priv->easing_mode = mode;
g_object_notify (G_OBJECT (layout), "easing-mode");
}
}
/**
* clutter_box_layout_get_easing_mode:
* @layout: a #ClutterBoxLayout
*
* Retrieves the easing mode set using clutter_box_layout_set_easing_mode()
*
* Return value: an easing mode
*
* Since: 1.2
*/
gulong
clutter_box_layout_get_easing_mode (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout),
CLUTTER_EASE_OUT_CUBIC);
return layout->priv->easing_mode;
}
/**
* clutter_box_layout_set_easing_duration:
* @layout: a #ClutterBoxLayout
* @msecs: the duration of the animations, in milliseconds
*
* Sets the duration of the animations used by @layout when animating changes
* in the layout properties
*
* Use clutter_box_layout_set_use_animations() to enable and disable the
* animations
*
* Since: 1.2
*/
void
clutter_box_layout_set_easing_duration (ClutterBoxLayout *layout,
guint msecs)
{
ClutterBoxLayoutPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
priv = layout->priv;
if (priv->easing_duration != msecs)
{
priv->easing_duration = msecs;
g_object_notify (G_OBJECT (layout), "easing-duration");
}
}
/**
* clutter_box_layout_get_easing_duration:
* @layout: a #ClutterBoxLayout
*
* Retrieves the duration set using clutter_box_layout_set_easing_duration()
*
* Return value: the duration of the animations, in milliseconds
*
* Since: 1.2
*/
guint
clutter_box_layout_get_easing_duration (ClutterBoxLayout *layout)
{
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), 500);
return layout->priv->easing_duration;
}
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