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mutter/clutter/clutter-box.c
Emmanuele Bassi 49d38b1e21 box: Implement the correct paint volume 
The allocation of the ClutterBox is not enough to be used as the paint
volume, because children might decide to paint outside that area.

Instead, we should use the allocation if the Box has a background color
and then do what Group does, and union all the paint volumes of the
children.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2600
2011-03-08 19:27:07 +00:00

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/*
* 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 <http://www.gnu.org/licenses/>.
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
*/
/**
* 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.
*
* <example id="example-clutter-box">
* <title>Using ClutterBox</title>
* <para>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().</para>
* <programlisting>
* ClutterActor *box;
* ClutterLayoutManager *layout;
*
* /&ast; Create the layout manager first &ast;/
* 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);
*
* /&ast; Then create the ClutterBox actor. The Box will take
* &ast; ownership of the ClutterLayoutManager instance by sinking
* &ast; its floating reference
* &ast;/
* box = clutter_box_new (layout);
*
* /&ast; Now add children to the Box using the variadic arguments
* &ast; function clutter_box_pack() to set layout properties
* &ast;/
* clutter_box_pack (CLUTTER_BOX (box), actor,
* "x-align", CLUTTER_BOX_ALIGNMENT_CENTER,
* "y-align", CLUTTER_BOX_ALIGNMENT_END,
* "expand", TRUE,
* NULL);
* </programlisting>
* </example>
*
* #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 <glib-object.h>
#include <gobject/gvaluecollector.h>
#include "clutter-box.h"
#include "clutter-actor-private.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,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
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 gboolean
clutter_box_real_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
gboolean retval = FALSE;
GList *l;
/* if we have a background color, and an allocation, then we need to
* set it as the base of our paint volume
*/
if (priv->color_set)
retval = clutter_paint_volume_set_from_allocation (volume, actor);
/* bail out early if we don't have any child */
if (priv->children == NULL)
return retval;
else
retval = TRUE;
/* otherwise, union the paint volumes of our children, in case
* any one of them decides to paint outside the parent's allocation
*/
for (l = priv->children; l != NULL; l = l->next)
{
ClutterActor *child = l->data;
const ClutterPaintVolume *child_volume;
/* This gets the paint volume of the child transformed into the
* group's coordinate space... */
child_volume = clutter_actor_get_transformed_paint_volume (child, actor);
if (!child_volume)
return FALSE;
clutter_paint_volume_union (volume, child_volume);
}
return retval;
}
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;
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;
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);
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_by_pspec (G_OBJECT (self), obj_props[PROP_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->get_paint_volume = clutter_box_real_get_paint_volume;
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",
P_("Layout Manager"),
P_("The layout manager used by the box"),
CLUTTER_TYPE_LAYOUT_MANAGER,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT);
obj_props[PROP_LAYOUT_MANAGER] = pspec;
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",
P_("Color"),
P_("The background color of the box"),
&default_box_color,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_COLOR] = pspec;
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",
P_("Color Set"),
P_("Whether the background color is set"),
FALSE,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_COLOR_SET] = pspec;
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: (transfer none): a #ClutterLayoutManager. The returned
* #ClutterLayoutManager is owned by the #ClutterBox and it should not
* be unreferenced
*
* 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_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
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);
/* we need to explicitly call this, because we're not going through
* the default code paths provided by clutter_container_add()
*/
clutter_container_create_child_meta (CLUTTER_CONTAINER (box), 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_by_pspec (G_OBJECT (box), obj_props[PROP_COLOR_SET]);
g_object_notify_by_pspec (G_OBJECT (box), obj_props[PROP_COLOR]);
}
/**
* clutter_box_get_color:
* @box: a #ClutterBox
* @color: (out caller-allocates): 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;
}
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