/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2009,2010 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 .
*/
/**
* SECTION:clutter-box
* @short_description: A Generic layout container
*
* #ClutterBox is a #ClutterActor sub-class implementing the #ClutterContainer
* interface. A Box delegates the whole size requisition and size allocation to
* a #ClutterLayoutManager instance.
*
*
* Using ClutterBox
* The following code shows how to create a #ClutterBox with
* a #ClutterLayoutManager sub-class, and how to add children to
* it via clutter_box_pack().
*
* ClutterActor *box;
* ClutterLayoutManager *layout;
*
* /* Create the layout manager first */
* layout = clutter_box_layout_new ();
* clutter_box_layout_set_homogeneous (CLUTTER_BOX_LAYOUT (layout), TRUE);
* clutter_box_layout_set_spacing (CLUTTER_BOX_LAYOUT (layout), 12);
*
* /* Then create the ClutterBox actor. The Box will take
* * ownership of the ClutterLayoutManager instance by sinking
* * its floating reference
* */
* box = clutter_box_new (layout);
*
* /* Now add children to the Box using the variadic arguments
* * function clutter_box_pack() to set layout properties
* */
* clutter_box_pack (CLUTTER_BOX (box), actor,
* "x-align", CLUTTER_BOX_ALIGNMENT_CENTER,
* "y-align", CLUTTER_BOX_ALIGNMENT_END,
* "expand", TRUE,
* NULL);
*
*
*
* #ClutterBox's clutter_box_pack() wraps the generic
* clutter_container_add_actor() function, but it also allows setting
* layout properties while adding the new child to the box.
*
* #ClutterBox is available since Clutter 1.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include
#include
#include "clutter-box.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#define CLUTTER_BOX_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_BOX, ClutterBoxPrivate))
struct _ClutterBoxPrivate
{
ClutterLayoutManager *manager;
GList *children;
guint changed_id;
ClutterColor color;
guint color_set : 1;
};
enum
{
PROP_0,
PROP_LAYOUT_MANAGER,
PROP_COLOR,
PROP_COLOR_SET
};
static const ClutterColor default_box_color = { 255, 255, 255, 255 };
static void clutter_container_iface_init (ClutterContainerIface *iface);
G_DEFINE_TYPE_WITH_CODE (ClutterBox, clutter_box, CLUTTER_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_CONTAINER,
clutter_container_iface_init));
static gint
sort_by_depth (gconstpointer a,
gconstpointer b)
{
gfloat depth_a = clutter_actor_get_depth ((ClutterActor *) a);
gfloat depth_b = clutter_actor_get_depth ((ClutterActor *) b);
if (depth_a < depth_b)
return -1;
if (depth_a > depth_b)
return 1;
return 0;
}
static void
clutter_box_real_add (ClutterContainer *container,
ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
GList *l, *prev = NULL;
gfloat actor_depth;
g_object_ref (actor);
actor_depth = clutter_actor_get_depth (actor);
/* Find the right place to insert the child so that it will still be
sorted and the child will be after all of the actors at the same
depth */
for (l = priv->children;
l && (clutter_actor_get_depth (l->data) <= actor_depth);
l = l->next)
prev = l;
/* Insert the node before the found node */
l = g_list_prepend (l, actor);
/* Fixup the links */
if (prev)
{
prev->next = l;
l->prev = prev;
}
else
priv->children = l;
clutter_actor_set_parent (actor, CLUTTER_ACTOR (container));
clutter_actor_queue_relayout (actor);
g_signal_emit_by_name (container, "actor-added", actor);
g_object_unref (actor);
}
static void
clutter_box_real_remove (ClutterContainer *container,
ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
g_object_ref (actor);
priv->children = g_list_remove (priv->children, actor);
clutter_actor_unparent (actor);
clutter_actor_queue_relayout (CLUTTER_ACTOR (container));
g_signal_emit_by_name (container, "actor-removed", actor);
g_object_unref (actor);
}
static void
clutter_box_real_foreach (ClutterContainer *container,
ClutterCallback callback,
gpointer user_data)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
/* Using g_list_foreach instead of iterating the list manually
because it has better protection against the current node being
removed. This will happen for example if someone calls
clutter_container_foreach(container, clutter_actor_destroy) */
g_list_foreach (priv->children, (GFunc) callback, user_data);
}
static void
clutter_box_real_raise (ClutterContainer *container,
ClutterActor *actor,
ClutterActor *sibling)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
priv->children = g_list_remove (priv->children, actor);
if (sibling == NULL)
priv->children = g_list_append (priv->children, actor);
else
{
gint index_ = g_list_index (priv->children, sibling) + 1;
priv->children = g_list_insert (priv->children, actor, index_);
}
clutter_actor_queue_relayout (CLUTTER_ACTOR (container));
}
static void
clutter_box_real_lower (ClutterContainer *container,
ClutterActor *actor,
ClutterActor *sibling)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
priv->children = g_list_remove (priv->children, actor);
if (sibling == NULL)
priv->children = g_list_prepend (priv->children, actor);
else
{
gint index_ = g_list_index (priv->children, sibling);
priv->children = g_list_insert (priv->children, actor, index_);
}
clutter_actor_queue_relayout (CLUTTER_ACTOR (container));
}
static void
clutter_box_real_sort_depth_order (ClutterContainer *container)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
priv->children = g_list_sort (priv->children, sort_by_depth);
clutter_actor_queue_relayout (CLUTTER_ACTOR (container));
}
static void
clutter_container_iface_init (ClutterContainerIface *iface)
{
iface->add = clutter_box_real_add;
iface->remove = clutter_box_real_remove;
iface->foreach = clutter_box_real_foreach;
iface->raise = clutter_box_real_raise;
iface->lower = clutter_box_real_lower;
iface->sort_depth_order = clutter_box_real_sort_depth_order;
}
static void
clutter_box_real_paint (ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
if (priv->color_set)
{
ClutterActorBox box = { 0, };
gfloat width, height;
guint8 tmp_alpha;
clutter_actor_get_allocation_box (actor, &box);
clutter_actor_box_get_size (&box, &width, &height);
tmp_alpha = clutter_actor_get_paint_opacity (actor)
* priv->color.alpha
/ 255;
cogl_set_source_color4ub (priv->color.red,
priv->color.green,
priv->color.blue,
tmp_alpha);
cogl_rectangle (0, 0, width, height);
}
g_list_foreach (priv->children, (GFunc) clutter_actor_paint, NULL);
}
static void
clutter_box_real_pick (ClutterActor *actor,
const ClutterColor *pick)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
CLUTTER_ACTOR_CLASS (clutter_box_parent_class)->pick (actor, pick);
g_list_foreach (priv->children, (GFunc) clutter_actor_paint, NULL);
}
static void
clutter_box_real_get_preferred_width (ClutterActor *actor,
gfloat for_height,
gfloat *min_width,
gfloat *natural_width)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
/* if we don't have any children don't bother proxying the
* call to the layout manager instance
*/
if (priv->children == NULL || priv->manager == NULL)
{
if (min_width)
*min_width = 0.0;
if (natural_width)
*natural_width = 0.0;
return;
}
clutter_layout_manager_get_preferred_width (priv->manager,
CLUTTER_CONTAINER (actor),
for_height,
min_width, natural_width);
}
static void
clutter_box_real_get_preferred_height (ClutterActor *actor,
gfloat for_width,
gfloat *min_height,
gfloat *natural_height)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
/* if we don't have any children don't bother proxying the
* call to the layout manager instance
*/
if (priv->children == NULL || priv->manager == NULL)
{
if (min_height)
*min_height = 0.0;
if (natural_height)
*natural_height = 0.0;
return;
}
clutter_layout_manager_get_preferred_height (priv->manager,
CLUTTER_CONTAINER (actor),
for_width,
min_height, natural_height);
}
static void
clutter_box_real_allocate (ClutterActor *actor,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
ClutterActorClass *klass;
klass = CLUTTER_ACTOR_CLASS (clutter_box_parent_class);
klass->allocate (actor, allocation, flags);
if (priv->children == NULL || priv->manager == NULL)
return;
clutter_layout_manager_allocate (priv->manager,
CLUTTER_CONTAINER (actor),
allocation, flags);
}
static void
clutter_box_destroy (ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
/* destroy all our children */
g_list_foreach (priv->children, (GFunc) clutter_actor_destroy, NULL);
if (CLUTTER_ACTOR_CLASS (clutter_box_parent_class)->destroy)
CLUTTER_ACTOR_CLASS (clutter_box_parent_class)->destroy (actor);
}
static inline void
set_layout_manager (ClutterBox *self,
ClutterLayoutManager *manager)
{
ClutterBoxPrivate *priv = self->priv;
if (priv->manager == manager)
return;
if (priv->manager != NULL)
{
if (priv->changed_id != 0)
g_signal_handler_disconnect (priv->manager, priv->changed_id);
clutter_layout_manager_set_container (priv->manager, NULL);
g_object_unref (priv->manager);
priv->manager = NULL;
priv->changed_id = 0;
}
if (manager != NULL)
{
priv->manager = g_object_ref_sink (manager);
clutter_layout_manager_set_container (manager,
CLUTTER_CONTAINER (self));
priv->changed_id =
g_signal_connect_swapped (priv->manager, "layout-changed",
G_CALLBACK (clutter_actor_queue_relayout),
self);
}
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "layout-manager");
}
static void
clutter_box_dispose (GObject *gobject)
{
ClutterBox *self = CLUTTER_BOX (gobject);
set_layout_manager (self, NULL);
G_OBJECT_CLASS (clutter_box_parent_class)->dispose (gobject);
}
static void
clutter_box_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBox *self = CLUTTER_BOX (gobject);
switch (prop_id)
{
case PROP_LAYOUT_MANAGER:
set_layout_manager (self, g_value_get_object (value));
break;
case PROP_COLOR:
clutter_box_set_color (self, clutter_value_get_color (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (gobject)->priv;
switch (prop_id)
{
case PROP_LAYOUT_MANAGER:
g_value_set_object (value, priv->manager);
break;
case PROP_COLOR:
clutter_value_set_color (value, &priv->color);
break;
case PROP_COLOR_SET:
g_value_set_boolean (value, priv->color_set);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_class_init (ClutterBoxClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (ClutterBoxPrivate));
actor_class->get_preferred_width = clutter_box_real_get_preferred_width;
actor_class->get_preferred_height = clutter_box_real_get_preferred_height;
actor_class->allocate = clutter_box_real_allocate;
actor_class->paint = clutter_box_real_paint;
actor_class->pick = clutter_box_real_pick;
actor_class->destroy = clutter_box_destroy;
gobject_class->set_property = clutter_box_set_property;
gobject_class->get_property = clutter_box_get_property;
gobject_class->dispose = clutter_box_dispose;
/**
* ClutterBox:layout-manager:
*
* The #ClutterLayoutManager used by the #ClutterBox
*
* Since: 1.2
*/
pspec = g_param_spec_object ("layout-manager",
"Layout Manager",
"The layout manager used by the box",
CLUTTER_TYPE_LAYOUT_MANAGER,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT);
g_object_class_install_property (gobject_class,
PROP_LAYOUT_MANAGER,
pspec);
/**
* ClutterBox:color:
*
* The color to be used to paint the background of the
* #ClutterBox. Setting this property will set the
* #ClutterBox:color-set property as a side effect
*
* Since: 1.2
*/
pspec = clutter_param_spec_color ("color",
"Color",
"The background color of the box",
&default_box_color,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_COLOR, pspec);
/**
* ClutterBox:color-set:
*
* Whether the #ClutterBox:color property has been set
*
* Since: 1.2
*/
pspec = g_param_spec_boolean ("color-set",
"Color Set",
"Whether the background color is set",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_COLOR_SET, pspec);
}
static void
clutter_box_init (ClutterBox *self)
{
self->priv = CLUTTER_BOX_GET_PRIVATE (self);
self->priv->color = default_box_color;
}
/**
* clutter_box_new:
* @manager: a #ClutterLayoutManager
*
* Creates a new #ClutterBox. The children of the box will be layed
* out by the passed @manager
*
* Return value: the newly created #ClutterBox actor
*
* Since: 1.0
*/
ClutterActor *
clutter_box_new (ClutterLayoutManager *manager)
{
g_return_val_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager), NULL);
return g_object_new (CLUTTER_TYPE_BOX,
"layout-manager", manager,
NULL);
}
/**
* clutter_box_set_layout_manager:
* @box: a #ClutterBox
* @manager: a #ClutterLayoutManager
*
* Sets the #ClutterLayoutManager for @box
*
* A #ClutterLayoutManager is a delegate object that controls the
* layout of the children of @box
*
* Since: 1.2
*/
void
clutter_box_set_layout_manager (ClutterBox *box,
ClutterLayoutManager *manager)
{
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
set_layout_manager (box, manager);
}
/**
* clutter_box_get_layout_manager:
* @box: a #ClutterBox
*
* Retrieves the #ClutterLayoutManager instance used by @box
*
* Return value: a #ClutterLayoutManager
*
* Since: 1.2
*/
ClutterLayoutManager *
clutter_box_get_layout_manager (ClutterBox *box)
{
g_return_val_if_fail (CLUTTER_IS_BOX (box), NULL);
return box->priv->manager;
}
/**
* clutter_box_packv:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @n_properties: the number of properties to set
* @properties: (array length=n_properties) (element-type utf8): a vector
* containing the property names to set
* @values: (array length=n_properties): a vector containing the property
* values to set
*
* Vector-based variant of clutter_box_pack(), intended for language
* bindings to use
*
* Since: 1.2
*/
void
clutter_box_packv (ClutterBox *box,
ClutterActor *actor,
guint n_properties,
const gchar * const properties[],
const GValue *values)
{
ClutterContainer *container;
ClutterBoxPrivate *priv;
ClutterLayoutMeta *meta;
GObjectClass *klass;
gint i;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
container = CLUTTER_CONTAINER (box);
clutter_container_add_actor (container, actor);
priv = box->priv;
meta = clutter_layout_manager_get_child_meta (priv->manager,
container,
actor);
if (meta == NULL)
return;
klass = G_OBJECT_GET_CLASS (meta);
for (i = 0; i < n_properties; i++)
{
const gchar *pname = properties[i];
GParamSpec *pspec;
pspec = g_object_class_find_property (klass, pname);
if (pspec == NULL)
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') does not exist",
G_STRLOC,
pname,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
clutter_layout_manager_child_set_property (priv->manager,
container, actor,
pname, &values[i]);
}
}
static inline void
clutter_box_set_property_valist (ClutterBox *box,
ClutterActor *actor,
const gchar *first_property,
va_list var_args)
{
ClutterContainer *container = CLUTTER_CONTAINER (box);
ClutterBoxPrivate *priv = box->priv;
ClutterLayoutMeta *meta;
GObjectClass *klass;
const gchar *pname;
if (priv->manager == NULL)
return;
meta = clutter_layout_manager_get_child_meta (priv->manager,
container,
actor);
if (meta == NULL)
return;
klass = G_OBJECT_GET_CLASS (meta);
pname = first_property;
while (pname)
{
GValue value = { 0, };
GParamSpec *pspec;
gchar *error;
pspec = g_object_class_find_property (klass, pname);
if (pspec == NULL)
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') does not exist",
G_STRLOC,
pname,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
clutter_layout_manager_child_set_property (priv->manager,
container, actor,
pspec->name, &value);
g_value_unset (&value);
pname = va_arg (var_args, gchar*);
}
}
/**
* clutter_box_pack:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @first_property: the name of the first property to set, or %NULL
* @Varargs: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box and sets layout properties at the same time,
* if the #ClutterLayoutManager used by @box has them
*
* This function is a wrapper around clutter_container_add_actor()
* and clutter_layout_manager_child_set()
*
* Language bindings should use the vector-based clutter_box_addv()
* variant instead
*
* Since: 1.2
*/
void
clutter_box_pack (ClutterBox *box,
ClutterActor *actor,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
clutter_container_add_actor (CLUTTER_CONTAINER (box), actor);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_pack_after:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @sibling: (allow none): a #ClutterActor or %NULL
* @first_property: the name of the first property to set, or %NULL
* @Varargs: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box, placing it after @sibling, and sets layout
* properties at the same time, if the #ClutterLayoutManager used by
* @box supports them
*
* If @sibling is %NULL then @actor is placed at the end of the
* list of children, to be allocated and painted after every other child
*
* This function is a wrapper around clutter_container_add_actor(),
* clutter_container_raise_child() and clutter_layout_manager_child_set()
*
* Since: 1.2
*/
void
clutter_box_pack_after (ClutterBox *box,
ClutterActor *actor,
ClutterActor *sibling,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
g_return_if_fail (sibling == NULL || CLUTTER_IS_ACTOR (sibling));
clutter_container_add_actor (CLUTTER_CONTAINER (box), actor);
clutter_container_raise_child (CLUTTER_CONTAINER (box), actor, sibling);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_pack_before:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @sibling: (allow none): a #ClutterActor or %NULL
* @first_property: the name of the first property to set, or %NULL
* @Varargs: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box, placing it before @sibling, and sets layout
* properties at the same time, if the #ClutterLayoutManager used by
* @box supports them
*
* If @sibling is %NULL then @actor is placed at the beginning of the
* list of children, to be allocated and painted below every other child
*
* This function is a wrapper around clutter_container_add_actor(),
* clutter_container_lower_child() and clutter_layout_manager_child_set()
*
* Since: 1.2
*/
void
clutter_box_pack_before (ClutterBox *box,
ClutterActor *actor,
ClutterActor *sibling,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
g_return_if_fail (sibling == NULL || CLUTTER_IS_ACTOR (sibling));
clutter_container_add_actor (CLUTTER_CONTAINER (box), actor);
clutter_container_lower_child (CLUTTER_CONTAINER (box), actor, sibling);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_pack_at:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @position: the position to insert the @actor at
* @first_property: the name of the first property to set, or %NULL
* @Varargs: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box, placing it at @position, and sets layout
* properties at the same time, if the #ClutterLayoutManager used by
* @box supports them
*
* If @position is a negative number, or is larger than the number of
* children of @box, the new child is added at the end of the list of
* children
*
* Since: 1.2
*/
void
clutter_box_pack_at (ClutterBox *box,
ClutterActor *actor,
gint position,
const gchar *first_property,
...)
{
ClutterBoxPrivate *priv;
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = box->priv;
/* this is really clutter_box_add() with a different insert() */
priv->children = g_list_insert (priv->children,
actor,
position);
clutter_actor_set_parent (actor, CLUTTER_ACTOR (box));
clutter_actor_queue_relayout (actor);
g_signal_emit_by_name (box, "actor-added", actor);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_set_color:
* @box: a #ClutterBox
* @color: (allow-none): the background color, or %NULL to unset
*
* Sets (or unsets) the background color for @box
*
* Since: 1.2
*/
void
clutter_box_set_color (ClutterBox *box,
const ClutterColor *color)
{
ClutterBoxPrivate *priv;
g_return_if_fail (CLUTTER_IS_BOX (box));
priv = box->priv;
if (color)
{
priv->color = *color;
priv->color_set = TRUE;
}
else
priv->color_set = FALSE;
clutter_actor_queue_redraw (CLUTTER_ACTOR (box));
g_object_notify (G_OBJECT (box), "color-set");
g_object_notify (G_OBJECT (box), "color");
}
/**
* clutter_box_get_color:
* @box: a #ClutterBox
* @color: (out): return location for a #ClutterColor
*
* Retrieves the background color of @box
*
* If the #ClutterBox:color-set property is set to %FALSE the
* returned #ClutterColor is undefined
*
* Since: 1.2
*/
void
clutter_box_get_color (ClutterBox *box,
ClutterColor *color)
{
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (color != NULL);
*color = box->priv->color;
}