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mutter-performance-source/clutter/clutter-bin-layout.c
Emmanuele Bassi ab76584965 layout-manager: Implement set_container() 
Store a back pointer of the layout manager inside the container using
the GObject instance data. This introduces a change in the implementation
of ClutterLayoutManager, though it's still binary compatible.
2010-06-07 22:40:34 +01:00

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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>
*/
/**
* SECTION:clutter-bin-layout
* @short_description: A simple layout manager
*
* #ClutterBinLayout is a layout manager which implements the following
* policy:
*
* <itemizedlist>
* <listitem><simpara>the preferred size is the maximum preferred size
* between all the children of the container using the
* layout;</simpara></listitem>
* <listitem><simpara>each child is allocated in "layers", on on top
* of the other;</simpara></listitem>
* <listitem><simpara>for each layer there are horizontal and vertical
* alignment policies.</simpara></listitem>
* </itemizedlist>
*
* <figure id="bin-layout">
* <title>Bin layout</title>
* <para>The image shows a #ClutterBinLayout with three layers:
* a background #ClutterCairoTexture, set to fill on both the X
* and Y axis; a #ClutterTexture, set to center on both the X and
* Y axis; and a #ClutterRectangle, set to %CLUTTER_BIN_ALIGNMENT_END
* on both the X and Y axis.</para>
* <graphic fileref="bin-layout.png" format="PNG"/>
* </figure>
*
* <example id="example-clutter-bin-layout">
* <title>How to pack actors inside a BinLayout</title>
* <para>The following code shows how to build a composite actor with
* a texture and a background, and add controls overlayed on top. The
* background is set to fill the whole allocation, whilst the texture
* is centered; there is a control in the top right corner and a label
* in the bottom, filling out the whole allocated width.</para>
* <programlisting>
* ClutterLayoutManager *manager;
* ClutterActor *box;
*
* /&ast; create the layout first &ast;/
* layout = clutter_bin_layout_new (CLUTTER_BIN_ALIGNMENT_CENTER,
* CLUTTER_BIN_ALIGNMENT_CENTER);
* box = clutter_box_new (layout); /&ast; then the container &ast;/
*
* /&ast; we can use the layout object to add actors &ast;/
* clutter_bin_layout_add (CLUTTER_BIN_LAYOUT (layout), background,
* CLUTTER_BIN_ALIGNMENT_FILL,
* CLUTTER_BIN_ALIGNMENT_FILL);
* clutter_bin_layout_add (CLUTTER_BIN_LAYOUT (layout), icon,
* CLUTTER_BIN_ALIGNMENT_CENTER,
* CLUTTER_BIN_ALIGNMENT_CENTER);
*
* /&ast; align to the bottom left &ast;/
* clutter_bin_layout_add (CLUTTER_BIN_LAYOUT (layout), label,
* CLUTTER_BIN_ALIGNMENT_START,
* CLUTTER_BIN_ALIGNMENT_END);
* /&ast; align to the top right &ast;/
* clutter_bin_layout_add (CLUTTER_BIN_LAYOUT (layout), button,
* CLUTTER_BIN_ALIGNMENT_END,
* CLUTTER_BIN_ALIGNMENT_START);
* </programlisting>
* </example>
*
* #ClutterBinLayout is available since Clutter 1.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include "clutter-actor.h"
#include "clutter-animatable.h"
#include "clutter-bin-layout.h"
#include "clutter-child-meta.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-layout-meta.h"
#include "clutter-private.h"
#define CLUTTER_TYPE_BIN_LAYER (clutter_bin_layer_get_type ())
#define CLUTTER_BIN_LAYER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BIN_LAYER, ClutterBinLayer))
#define CLUTTER_IS_BIN_LAYER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BIN_LAYER))
#define CLUTTER_BIN_LAYOUT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_BIN_LAYOUT, ClutterBinLayoutPrivate))
typedef struct _ClutterBinLayer ClutterBinLayer;
typedef struct _ClutterLayoutMetaClass ClutterBinLayerClass;
struct _ClutterBinLayoutPrivate
{
ClutterBinAlignment x_align;
ClutterBinAlignment y_align;
ClutterContainer *container;
};
struct _ClutterBinLayer
{
ClutterLayoutMeta parent_instance;
ClutterBinAlignment x_align;
ClutterBinAlignment y_align;
};
enum
{
PROP_LAYER_0,
PROP_LAYER_X_ALIGN,
PROP_LAYER_Y_ALIGN
};
enum
{
PROP_0,
PROP_X_ALIGN,
PROP_Y_ALIGN
};
G_DEFINE_TYPE (ClutterBinLayer,
clutter_bin_layer,
CLUTTER_TYPE_LAYOUT_META);
G_DEFINE_TYPE (ClutterBinLayout,
clutter_bin_layout,
CLUTTER_TYPE_LAYOUT_MANAGER);
/*
* ClutterBinLayer
*/
static void
set_layer_x_align (ClutterBinLayer *self,
ClutterBinAlignment alignment)
{
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
if (self->x_align == alignment)
return;
self->x_align = alignment;
meta = CLUTTER_LAYOUT_META (self);
manager = clutter_layout_meta_get_manager (meta);
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (self), "x-align");
}
static void
set_layer_y_align (ClutterBinLayer *self,
ClutterBinAlignment alignment)
{
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
if (self->y_align == alignment)
return;
self->y_align = alignment;
meta = CLUTTER_LAYOUT_META (self);
manager = clutter_layout_meta_get_manager (meta);
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (self), "y-align");
}
static void
clutter_bin_layer_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBinLayer *layer = CLUTTER_BIN_LAYER (gobject);
switch (prop_id)
{
case PROP_LAYER_X_ALIGN:
set_layer_x_align (layer, g_value_get_enum (value));
break;
case PROP_LAYER_Y_ALIGN:
set_layer_y_align (layer, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_bin_layer_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBinLayer *layer = CLUTTER_BIN_LAYER (gobject);
switch (prop_id)
{
case PROP_LAYER_X_ALIGN:
g_value_set_enum (value, layer->x_align);
break;
case PROP_LAYER_Y_ALIGN:
g_value_set_enum (value, layer->y_align);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_bin_layer_class_init (ClutterBinLayerClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
gobject_class->set_property = clutter_bin_layer_set_property;
gobject_class->get_property = clutter_bin_layer_get_property;
pspec = g_param_spec_enum ("x-align",
"Horizontal Alignment",
"Horizontal alignment for the actor "
"inside the layer",
CLUTTER_TYPE_BIN_ALIGNMENT,
CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_LAYER_X_ALIGN,
pspec);
pspec = g_param_spec_enum ("y-align",
"Vertical Alignment",
"Vertical alignment for the actor "
"inside the layer manager",
CLUTTER_TYPE_BIN_ALIGNMENT,
CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_LAYER_Y_ALIGN,
pspec);
}
static void
clutter_bin_layer_init (ClutterBinLayer *layer)
{
layer->x_align = CLUTTER_BIN_ALIGNMENT_CENTER;
layer->y_align = CLUTTER_BIN_ALIGNMENT_CENTER;
}
/*
* ClutterBinLayout
*/
static void
set_x_align (ClutterBinLayout *self,
ClutterBinAlignment alignment)
{
ClutterBinLayoutPrivate *priv = self->priv;
if (priv->x_align != alignment)
{
ClutterLayoutManager *manager;
priv->x_align = alignment;
manager = CLUTTER_LAYOUT_MANAGER (self);
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (self), "x-align");
}
}
static void
set_y_align (ClutterBinLayout *self,
ClutterBinAlignment alignment)
{
ClutterBinLayoutPrivate *priv = self->priv;
if (priv->y_align != alignment)
{
ClutterLayoutManager *manager;
priv->y_align = alignment;
manager = CLUTTER_LAYOUT_MANAGER (self);
clutter_layout_manager_layout_changed (manager);
g_object_notify (G_OBJECT (self), "y-align");
}
}
static void
clutter_bin_layout_get_preferred_width (ClutterLayoutManager *manager,
ClutterContainer *container,
gfloat for_height,
gfloat *min_width_p,
gfloat *nat_width_p)
{
GList *children = clutter_container_get_children (container);
GList *l;
gfloat min_width, nat_width;
min_width = nat_width = 0.0;
for (l = children; l != NULL; l = l->next)
{
ClutterActor *child = l->data;
gfloat minimum, natural;
clutter_actor_get_preferred_width (child, for_height,
&minimum,
&natural);
min_width = MAX (min_width, minimum);
nat_width = MAX (nat_width, natural);
}
if (min_width_p)
*min_width_p = min_width;
if (nat_width_p)
*nat_width_p = nat_width;
}
static void
clutter_bin_layout_get_preferred_height (ClutterLayoutManager *manager,
ClutterContainer *container,
gfloat for_width,
gfloat *min_height_p,
gfloat *nat_height_p)
{
GList *children = clutter_container_get_children (container);
GList *l;
gfloat min_height, nat_height;
min_height = nat_height = 0.0;
for (l = children; l != NULL; l = l->next)
{
ClutterActor *child = l->data;
gfloat minimum, natural;
clutter_actor_get_preferred_height (child, for_width,
&minimum,
&natural);
min_height = MAX (min_height, minimum);
nat_height = MAX (nat_height, natural);
}
if (min_height_p)
*min_height_p = min_height;
if (nat_height_p)
*nat_height_p = nat_height;
}
static gdouble
get_bin_alignment_factor (ClutterBinAlignment alignment)
{
switch (alignment)
{
case CLUTTER_BIN_ALIGNMENT_CENTER:
return 0.5;
case CLUTTER_BIN_ALIGNMENT_START:
return 0.0;
case CLUTTER_BIN_ALIGNMENT_END:
return 1.0;
case CLUTTER_BIN_ALIGNMENT_FIXED:
case CLUTTER_BIN_ALIGNMENT_FILL:
return 0.0;
}
return 0.0;
}
static void
clutter_bin_layout_allocate (ClutterLayoutManager *manager,
ClutterContainer *container,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
GList *children = clutter_container_get_children (container);
GList *l;
gfloat available_w, available_h;
available_w = clutter_actor_box_get_width (allocation);
available_h = clutter_actor_box_get_height (allocation);
for (l = children; l != NULL; l = l->next)
{
ClutterActor *child = l->data;
ClutterLayoutMeta *meta;
ClutterBinLayer *layer;
ClutterActorBox child_alloc = { 0, };
gfloat child_width, child_height;
ClutterRequestMode request;
meta = clutter_layout_manager_get_child_meta (manager,
container,
child);
layer = CLUTTER_BIN_LAYER (meta);
if (layer->x_align == CLUTTER_BIN_ALIGNMENT_FILL)
{
child_alloc.x1 = 0;
child_alloc.x2 = ceilf (available_w);
}
if (layer->y_align == CLUTTER_BIN_ALIGNMENT_FILL)
{
child_alloc.y1 = 0;
child_alloc.y2 = ceilf (available_h);
}
/* if we are filling horizontally and vertically then we
* can break here because we already have a full allocation
*/
if (layer->x_align == CLUTTER_BIN_ALIGNMENT_FILL &&
layer->y_align == CLUTTER_BIN_ALIGNMENT_FILL)
{
clutter_actor_allocate (child, &child_alloc, flags);
continue;
}
child_width = child_height = 0;
request = clutter_actor_get_request_mode (child);
if (request == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
gfloat min_width, nat_width;
gfloat min_height, nat_height;
clutter_actor_get_preferred_width (child, available_h,
&min_width,
&nat_width);
child_width = CLAMP (nat_width, min_width, available_w);
clutter_actor_get_preferred_height (child, child_width,
&min_height,
&nat_height);
child_height = CLAMP (nat_height, min_height, available_h);
}
else if (request == CLUTTER_REQUEST_WIDTH_FOR_HEIGHT)
{
gfloat min_width, nat_width;
gfloat min_height, nat_height;
clutter_actor_get_preferred_height (child, available_w,
&min_height,
&nat_height);
child_height = CLAMP (nat_height, min_height, available_h);
clutter_actor_get_preferred_width (child, child_height,
&min_width,
&nat_width);
child_width = CLAMP (nat_width, min_width, available_w);
}
if (layer->x_align == CLUTTER_BIN_ALIGNMENT_FIXED)
{
child_alloc.x1 = ceilf (clutter_actor_get_x (child));
child_alloc.x2 = ceilf (child_alloc.x1 + child_width);
}
else
{
gdouble x_align = get_bin_alignment_factor (layer->x_align);
if (layer->x_align != CLUTTER_BIN_ALIGNMENT_FILL)
{
child_alloc.x1 = ceilf ((available_w - child_width) * x_align);
child_alloc.x2 = ceilf (child_alloc.x1 + child_width);
}
}
if (layer->y_align == CLUTTER_BIN_ALIGNMENT_FIXED)
{
child_alloc.y1 = ceilf (clutter_actor_get_y (child));
child_alloc.y2 = ceilf (child_alloc.y1 + child_height);
}
else
{
gdouble y_align = get_bin_alignment_factor (layer->y_align);
if (layer->y_align != CLUTTER_BIN_ALIGNMENT_FILL)
{
child_alloc.y1 = ceilf ((available_h - child_height) * y_align);
child_alloc.y2 = ceilf (child_alloc.y1 + child_height);
}
}
clutter_actor_allocate (child, &child_alloc, flags);
}
g_list_free (children);
}
static GType
clutter_bin_layout_get_child_meta_type (ClutterLayoutManager *manager)
{
return CLUTTER_TYPE_BIN_LAYER;
}
static ClutterLayoutMeta *
clutter_bin_layout_create_child_meta (ClutterLayoutManager *manager,
ClutterContainer *container,
ClutterActor *actor)
{
ClutterBinLayoutPrivate *priv;
priv = CLUTTER_BIN_LAYOUT (manager)->priv;
return g_object_new (CLUTTER_TYPE_BIN_LAYER,
"container", container,
"actor", actor,
"manager", manager,
"x-align", priv->x_align,
"y_align", priv->y_align,
NULL);
}
static void
clutter_bin_layout_set_container (ClutterLayoutManager *manager,
ClutterContainer *container)
{
ClutterBinLayoutPrivate *priv;
ClutterLayoutManagerClass *parent_class;
priv = CLUTTER_BIN_LAYOUT (manager)->priv;
priv->container = container;
parent_class = CLUTTER_LAYOUT_MANAGER_CLASS (clutter_bin_layout_parent_class);
parent_class->set_container (manager, container);
}
static void
clutter_bin_layout_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBinLayout *layout = CLUTTER_BIN_LAYOUT (gobject);
switch (prop_id)
{
case PROP_X_ALIGN:
set_x_align (layout, g_value_get_enum (value));
break;
case PROP_Y_ALIGN:
set_y_align (layout, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_bin_layout_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBinLayoutPrivate *priv;
priv = CLUTTER_BIN_LAYOUT (gobject)->priv;
switch (prop_id)
{
case PROP_X_ALIGN:
g_value_set_enum (value, priv->x_align);
break;
case PROP_Y_ALIGN:
g_value_set_enum (value, priv->y_align);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_bin_layout_class_init (ClutterBinLayoutClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterLayoutManagerClass *layout_class =
CLUTTER_LAYOUT_MANAGER_CLASS (klass);
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (ClutterBinLayoutPrivate));
gobject_class->set_property = clutter_bin_layout_set_property;
gobject_class->get_property = clutter_bin_layout_get_property;
/**
* ClutterBinLayout:x-align:
*
* The default horizontal alignment policy for actors managed
* by the #ClutterBinLayout
*
* Since: 1.2
*/
pspec = g_param_spec_enum ("x-align",
"Horizontal Alignment",
"Default horizontal alignment for the actors "
"inside the layout manager",
CLUTTER_TYPE_BIN_ALIGNMENT,
CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_X_ALIGN, pspec);
/**
* ClutterBinLayout:y-align:
*
* The default vertical alignment policy for actors managed
* by the #ClutterBinLayout
*
* Since: 1.2
*/
pspec = g_param_spec_enum ("y-align",
"Vertical Alignment",
"Default vertical alignment for the actors "
"inside the layout manager",
CLUTTER_TYPE_BIN_ALIGNMENT,
CLUTTER_BIN_ALIGNMENT_CENTER,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_Y_ALIGN, pspec);
layout_class->get_preferred_width =
clutter_bin_layout_get_preferred_width;
layout_class->get_preferred_height =
clutter_bin_layout_get_preferred_height;
layout_class->allocate =
clutter_bin_layout_allocate;
layout_class->create_child_meta =
clutter_bin_layout_create_child_meta;
layout_class->get_child_meta_type =
clutter_bin_layout_get_child_meta_type;
layout_class->set_container =
clutter_bin_layout_set_container;
}
static void
clutter_bin_layout_init (ClutterBinLayout *self)
{
self->priv = CLUTTER_BIN_LAYOUT_GET_PRIVATE (self);
self->priv->x_align = CLUTTER_BIN_ALIGNMENT_CENTER;
self->priv->y_align = CLUTTER_BIN_ALIGNMENT_CENTER;
}
/**
* clutter_bin_layout_new:
* @x_align: the default alignment policy to be used on the
* horizontal axis
* @y_align: the default alignment policy to be used on the
* vertical axis
*
* Creates a new #ClutterBinLayout layout manager
*
* Return value: the newly created layout manager
*
* Since: 1.2
*/
ClutterLayoutManager *
clutter_bin_layout_new (ClutterBinAlignment x_align,
ClutterBinAlignment y_align)
{
return g_object_new (CLUTTER_TYPE_BIN_LAYOUT,
"x-align", x_align,
"y-align", y_align,
NULL);
}
/**
* clutter_bin_layout_set_alignment:
* @self: a #ClutterBinLayout
* @child: (allow-none): a child of @container
* @x_align: the horizontal alignment policy to be used for the @child
* inside @container
* @y_align: the vertical aligment policy to be used on the @child
* inside @container
*
* Sets the horizontal and vertical alignment policies to be applied
* to a @child of @self
*
* If @child is %NULL then the @x_align and @y_align values will
* be set as the default alignment policies
*
* Since: 1.2
*/
void
clutter_bin_layout_set_alignment (ClutterBinLayout *self,
ClutterActor *child,
ClutterBinAlignment x_align,
ClutterBinAlignment y_align)
{
ClutterBinLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BIN_LAYOUT (self));
g_return_if_fail (child == NULL || CLUTTER_IS_ACTOR (child));
priv = self->priv;
if (priv->container == NULL)
{
if (child == NULL)
{
set_x_align (self, x_align);
set_y_align (self, y_align);
}
else
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before setting the alignment "
"on its children",
G_OBJECT_TYPE_NAME (self));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (self);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
child);
g_assert (CLUTTER_IS_BIN_LAYER (meta));
set_layer_x_align (CLUTTER_BIN_LAYER (meta), x_align);
set_layer_y_align (CLUTTER_BIN_LAYER (meta), y_align);
}
/**
* clutter_bin_layout_get_alignment:
* @self: a #ClutterBinLayout
* @child: (allow-none): a child of @container
* @x_align: (out) (allow-none): return location for the horizontal
* alignment policy
* @y_align: (out) (allow-none): return location for the vertical
* alignment policy
*
* Retrieves the horizontal and vertical alignment policies for
* a child of @self
*
* If @child is %NULL the default alignment policies will be returned
* instead
*
* Since: 1.2
*/
void
clutter_bin_layout_get_alignment (ClutterBinLayout *self,
ClutterActor *child,
ClutterBinAlignment *x_align,
ClutterBinAlignment *y_align)
{
ClutterBinLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
ClutterBinLayer *layer;
g_return_if_fail (CLUTTER_IS_BIN_LAYOUT (self));
priv = self->priv;
if (priv->container == NULL)
{
if (child == NULL)
{
if (x_align)
*x_align = priv->x_align;
if (y_align)
*y_align = priv->y_align;
}
else
g_warning ("The layout of type '%s' must be associated to "
"a ClutterContainer before getting the alignment "
"of its children",
G_OBJECT_TYPE_NAME (self));
return;
}
manager = CLUTTER_LAYOUT_MANAGER (self);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
child);
g_assert (CLUTTER_IS_BIN_LAYER (meta));
layer = CLUTTER_BIN_LAYER (meta);
if (x_align)
*x_align = layer->x_align;
if (y_align)
*y_align = layer->y_align;
}
/**
* clutter_bin_layout_add:
* @self: a #ClutterBinLayout
* @child: a #ClutterActor
* @x_align: horizontal alignment policy for @child
* @y_align: vertical alignment policy for @child
*
* Adds a #ClutterActor to the container using @self and
* sets the alignment policies for it
*
* This function is equivalent to clutter_container_add_actor()
* and clutter_layout_manager_child_set_property() but it does not
* require a pointer to the #ClutterContainer associated to the
* #ClutterBinLayout
*
* Since: 1.2
*/
void
clutter_bin_layout_add (ClutterBinLayout *self,
ClutterActor *child,
ClutterBinAlignment x_align,
ClutterBinAlignment y_align)
{
ClutterBinLayoutPrivate *priv;
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
g_return_if_fail (CLUTTER_IS_BIN_LAYOUT (self));
g_return_if_fail (CLUTTER_IS_ACTOR (child));
priv = self->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 (self));
return;
}
clutter_container_add_actor (priv->container, child);
manager = CLUTTER_LAYOUT_MANAGER (self);
meta = clutter_layout_manager_get_child_meta (manager,
priv->container,
child);
g_assert (CLUTTER_IS_BIN_LAYER (meta));
set_layer_x_align (CLUTTER_BIN_LAYER (meta), x_align);
set_layer_y_align (CLUTTER_BIN_LAYER (meta), y_align);
}
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