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mutter/clutter/clutter-container.c
Emmanuele Bassi 79acb088e7 Remove mentions of the FSF address 
Since using addresses that might change is something that finally
the FSF acknowledge as a plausible scenario (after changing address
twice), the license blurb in the source files should use the URI
for getting the license in case the library did not come with it.

Not that URIs cannot possibly change, but at least it's easier to
set up a redirection at the same place.

As a side note: this commit closes the oldes bug in Clutter's bug
report tool.

http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 12:56:10 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* 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/>.
*
*
*
* ClutterContainer: Generic actor container interface.
* Author: Emmanuele Bassi <ebassi@openedhand.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <glib-object.h>
#include <gobject/gvaluecollector.h>
#include "clutter-container.h"
#include "clutter-child-meta.h"
#include "clutter-debug.h"
#include "clutter-main.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#include "clutter-enum-types.h"
#define CLUTTER_CONTAINER_WARN_NOT_IMPLEMENTED(container,vfunc) \
G_STMT_START { \
g_warning ("Container of type '%s' does not implement " \
"the required ClutterContainer::%s virtual " \
"function.", \
G_OBJECT_TYPE_NAME ((container)), \
(vfunc)); \
} G_STMT_END
#define CLUTTER_CONTAINER_NOTE_NOT_IMPLEMENTED(container,vfunc) \
G_STMT_START { \
CLUTTER_NOTE (ACTOR, "Container of type '%s' does not " \
"implement the ClutterContainer::%s " \
"virtual function.", \
G_OBJECT_TYPE_NAME ((container)), \
(vfunc)); \
} G_STMT_END
/**
* SECTION:clutter-container
* @short_description: An interface for implementing container actors
*
* #ClutterContainer is an interface for writing actors containing other
* #ClutterActor<!-- -->s. It provides a standard API for adding, removing
* and iterating on every contained actor.
*
* An actor implementing #ClutterContainer is #ClutterGroup.
*
* #ClutterContainer is available since Clutter 0.4
*/
enum
{
ACTOR_ADDED,
ACTOR_REMOVED,
CHILD_NOTIFY,
LAST_SIGNAL
};
static guint container_signals[LAST_SIGNAL] = { 0, };
static GQuark quark_child_meta = 0;
static ClutterChildMeta *get_child_meta (ClutterContainer *container,
ClutterActor *actor);
static void create_child_meta (ClutterContainer *container,
ClutterActor *actor);
static void destroy_child_meta (ClutterContainer *container,
ClutterActor *actor);
static void
clutter_container_base_init (gpointer g_iface)
{
static gboolean initialised = FALSE;
if (!initialised)
{
GType iface_type = G_TYPE_FROM_INTERFACE (g_iface);
ClutterContainerIface *iface = g_iface;
initialised = TRUE;
quark_child_meta =
g_quark_from_static_string ("clutter-container-child-data");
/**
* ClutterContainer::actor-added:
* @container: the actor which received the signal
* @actor: the new child that has been added to @container
*
* The ::actor-added signal is emitted each time an actor
* has been added to @container.
*
* Since: 0.4
*/
container_signals[ACTOR_ADDED] =
g_signal_new (I_("actor-added"),
iface_type,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterContainerIface, actor_added),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
CLUTTER_TYPE_ACTOR);
/**
* ClutterContainer::actor-removed:
* @container: the actor which received the signal
* @actor: the child that has been removed from @container
*
* The ::actor-removed signal is emitted each time an actor
* is removed from @container.
*
* Since: 0.4
*/
container_signals[ACTOR_REMOVED] =
g_signal_new (I_("actor-removed"),
iface_type,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterContainerIface, actor_removed),
NULL, NULL,
clutter_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
CLUTTER_TYPE_ACTOR);
/**
* ClutterContainer::child-notify:
* @container: the container which received the signal
* @actor: the child that has had a property set.
*
* The ::child-notify signal is emitted each time a property is
* being set through the clutter_container_child_set() and
* clutter_container_child_set_property() calls.
*
* Since: 0.8
*/
container_signals[CHILD_NOTIFY] =
g_signal_new (I_("child-notify"),
iface_type,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (ClutterContainerIface, child_notify),
NULL, NULL,
clutter_marshal_VOID__OBJECT_OBJECT_PARAM,
G_TYPE_NONE, 2,
CLUTTER_TYPE_ACTOR, G_TYPE_PARAM);
iface->child_meta_type = G_TYPE_INVALID;
iface->create_child_meta = create_child_meta;
iface->destroy_child_meta = destroy_child_meta;
iface->get_child_meta = get_child_meta;
}
}
GType
clutter_container_get_type (void)
{
static GType container_type = 0;
if (G_UNLIKELY (!container_type))
{
const GTypeInfo container_info =
{
sizeof (ClutterContainerIface),
clutter_container_base_init,
NULL, /* iface_base_finalize */
};
container_type = g_type_register_static (G_TYPE_INTERFACE,
I_("ClutterContainer"),
&container_info, 0);
g_type_interface_add_prerequisite (container_type, G_TYPE_OBJECT);
}
return container_type;
}
/**
* clutter_container_add:
* @container: a #ClutterContainer
* @first_actor: the first #ClutterActor to add
* @Varargs: %NULL terminated list of actors to add
*
* Adds a list of #ClutterActor<!-- -->s to @container. Each time and
* actor is added, the "actor-added" signal is emitted. Each actor should
* be parented to @container, which takes a reference on the actor. You
* cannot add a #ClutterActor to more than one #ClutterContainer.
*
* Since: 0.4
*/
void
clutter_container_add (ClutterContainer *container,
ClutterActor *first_actor,
...)
{
va_list args;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (first_actor));
va_start (args, first_actor);
clutter_container_add_valist (container, first_actor, args);
va_end (args);
}
/**
* clutter_container_add_actor:
* @container: a #ClutterContainer
* @actor: the first #ClutterActor to add
*
* Adds a #ClutterActor to @container. This function will emit the
* "actor-added" signal. The actor should be parented to
* @container. You cannot add a #ClutterActor to more than one
* #ClutterContainer.
*
* Since: 0.4
*/
void
clutter_container_add_actor (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface;
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (!iface->add)
{
CLUTTER_CONTAINER_WARN_NOT_IMPLEMENTED (container, "add");
return;
}
parent = clutter_actor_get_parent (actor);
if (parent)
{
g_warning ("Attempting to add actor of type '%s' to a "
"container of type '%s', but the actor has "
"already a parent of type '%s'.",
g_type_name (G_OBJECT_TYPE (actor)),
g_type_name (G_OBJECT_TYPE (container)),
g_type_name (G_OBJECT_TYPE (parent)));
return;
}
clutter_container_create_child_meta (container, actor);
iface->add (container, actor);
}
/**
* clutter_container_add_valist:
* @container: a #ClutterContainer
* @first_actor: the first #ClutterActor to add
* @var_args: list of actors to add, followed by %NULL
*
* Alternative va_list version of clutter_container_add().
*
* Since: 0.4
*/
void
clutter_container_add_valist (ClutterContainer *container,
ClutterActor *first_actor,
va_list var_args)
{
ClutterActor *actor;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (first_actor));
actor = first_actor;
while (actor)
{
clutter_container_add_actor (container, actor);
actor = va_arg (var_args, ClutterActor*);
}
}
/**
* clutter_container_remove:
* @container: a #ClutterContainer
* @first_actor: first #ClutterActor to remove
* @Varargs: a %NULL-terminated list of actors to remove
*
* Removes a %NULL terminated list of #ClutterActor<!-- -->s from
* @container. Each actor should be unparented, so if you want to keep it
* around you must hold a reference to it yourself, using g_object_ref().
* Each time an actor is removed, the "actor-removed" signal is
* emitted by @container.
*
* Since: 0.4
*/
void
clutter_container_remove (ClutterContainer *container,
ClutterActor *first_actor,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (first_actor));
va_start (var_args, first_actor);
clutter_container_remove_valist (container, first_actor, var_args);
va_end (var_args);
}
/**
* clutter_container_remove_actor:
* @container: a #ClutterContainer
* @actor: a #ClutterActor
*
* Removes @actor from @container. The actor should be unparented, so
* if you want to keep it around you must hold a reference to it
* yourself, using g_object_ref(). When the actor has been removed,
* the "actor-removed" signal is emitted by @container.
*
* Since: 0.4
*/
void
clutter_container_remove_actor (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface;
ClutterActor *parent;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (!iface->remove)
{
CLUTTER_CONTAINER_WARN_NOT_IMPLEMENTED (container, "remove");
return;
}
parent = clutter_actor_get_parent (actor);
if (parent != CLUTTER_ACTOR (container))
{
g_warning ("Attempting to remove actor of type '%s' from "
"group of class '%s', but the container is not "
"the actor's parent.",
g_type_name (G_OBJECT_TYPE (actor)),
g_type_name (G_OBJECT_TYPE (container)));
return;
}
clutter_container_destroy_child_meta (container, actor);
iface->remove (container, actor);
}
/**
* clutter_container_remove_valist:
* @container: a #ClutterContainer
* @first_actor: the first #ClutterActor to add
* @var_args: list of actors to remove, followed by %NULL
*
* Alternative va_list version of clutter_container_remove().
*
* Since: 0.4
*/
void
clutter_container_remove_valist (ClutterContainer *container,
ClutterActor *first_actor,
va_list var_args)
{
ClutterActor *actor;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (first_actor));
actor = first_actor;
while (actor)
{
clutter_container_remove_actor (container, actor);
actor = va_arg (var_args, ClutterActor*);
}
}
static void
get_children_cb (ClutterActor *child,
gpointer data)
{
GList **children = data;
*children = g_list_prepend (*children, child);
}
/**
* clutter_container_get_children:
* @container: a #ClutterContainer
*
* Retrieves all the children of @container.
*
* Return value: (element-type Actor) (transfer container): a list
* of #ClutterActor<!-- -->s. Use g_list_free() on the returned
* list when done.
*
* Since: 0.4
*/
GList *
clutter_container_get_children (ClutterContainer *container)
{
GList *retval;
g_return_val_if_fail (CLUTTER_IS_CONTAINER (container), NULL);
retval = NULL;
clutter_container_foreach (container, get_children_cb, &retval);
return g_list_reverse (retval);
}
/**
* clutter_container_foreach:
* @container: a #ClutterContainer
* @callback: a function to be called for each child
* @user_data: data to be passed to the function, or %NULL
*
* Calls @callback for each child of @container that was added
* by the application (with clutter_container_add_actor()). Does
* not iterate over "internal" children that are part of the
* container's own implementation, if any.
*
* Since: 0.4
*/
void
clutter_container_foreach (ClutterContainer *container,
ClutterCallback callback,
gpointer user_data)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (callback != NULL);
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (!iface->foreach)
{
CLUTTER_CONTAINER_WARN_NOT_IMPLEMENTED (container, "foreach");
return;
}
iface->foreach (container, callback, user_data);
}
/**
* clutter_container_foreach_with_internals:
* @container: a #ClutterContainer
* @callback: a function to be called for each child
* @user_data: data to be passed to the function, or %NULL
*
* Calls @callback for each child of @container, including "internal"
* children built in to the container itself that were never added
* by the application.
*
* Since: 1.0
*/
void
clutter_container_foreach_with_internals (ClutterContainer *container,
ClutterCallback callback,
gpointer user_data)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (callback != NULL);
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (!iface->foreach)
{
CLUTTER_CONTAINER_WARN_NOT_IMPLEMENTED (container, "foreach");
return;
}
if (iface->foreach_with_internals != NULL)
iface->foreach_with_internals (container, callback, user_data);
else
iface->foreach (container, callback, user_data);
}
/**
* clutter_container_raise_child:
* @container: a #ClutterContainer
* @actor: the actor to raise
* @sibling: the sibling to raise to, or %NULL to raise to the top
*
* Raises @actor to @sibling level, in the depth ordering.
*
* Since: 0.6
*/
void
clutter_container_raise_child (ClutterContainer *container,
ClutterActor *actor,
ClutterActor *sibling)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
g_return_if_fail (sibling == NULL || CLUTTER_IS_ACTOR (sibling));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (!iface->raise)
{
CLUTTER_CONTAINER_NOTE_NOT_IMPLEMENTED (container, "raise");
return;
};
if (actor == sibling)
return;
if (clutter_actor_get_parent (actor) != CLUTTER_ACTOR (container))
{
g_warning ("Actor of type '%s' is not a child of the container "
"of type '%s'",
g_type_name (G_OBJECT_TYPE (actor)),
g_type_name (G_OBJECT_TYPE (container)));
return;
}
if (sibling &&
clutter_actor_get_parent (sibling) != CLUTTER_ACTOR (container))
{
g_warning ("Actor of type '%s' is not a child of the container "
"of type '%s'",
g_type_name (G_OBJECT_TYPE (sibling)),
g_type_name (G_OBJECT_TYPE (container)));
return;
}
iface->raise (container, actor, sibling);
}
/**
* clutter_container_lower_child:
* @container: a #ClutterContainer
* @actor: the actor to raise
* @sibling: the sibling to lower to, or %NULL to lower to the bottom
*
* Lowers @actor to @sibling level, in the depth ordering.
*
* Since: 0.6
*/
void
clutter_container_lower_child (ClutterContainer *container,
ClutterActor *actor,
ClutterActor *sibling)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
g_return_if_fail (sibling == NULL || CLUTTER_IS_ACTOR (sibling));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (!iface->lower)
{
CLUTTER_CONTAINER_NOTE_NOT_IMPLEMENTED (container, "lower");
return;
}
if (actor == sibling)
return;
if (clutter_actor_get_parent (actor) != CLUTTER_ACTOR (container))
{
g_warning ("Actor of type '%s' is not a child of the container "
"of type '%s'",
g_type_name (G_OBJECT_TYPE (actor)),
g_type_name (G_OBJECT_TYPE (container)));
return;
}
if (sibling &&
clutter_actor_get_parent (sibling) != CLUTTER_ACTOR (container))
{
g_warning ("Actor of type '%s' is not a child of the container "
"of type '%s'",
g_type_name (G_OBJECT_TYPE (sibling)),
g_type_name (G_OBJECT_TYPE (container)));
return;
}
iface->lower (container, actor, sibling);
}
/**
* clutter_container_sort_depth_order:
* @container: a #ClutterContainer
*
* Sorts a container's children using their depth. This function should not
* be normally used by applications.
*
* Since: 0.6
*/
void
clutter_container_sort_depth_order (ClutterContainer *container)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (iface->sort_depth_order)
iface->sort_depth_order (container);
else
CLUTTER_CONTAINER_NOTE_NOT_IMPLEMENTED (container, "sort_depth_order");
}
/**
* clutter_container_find_child_by_name:
* @container: a #ClutterContainer
* @child_name: the name of the requested child.
*
* Finds a child actor of a container by its name. Search recurses
* into any child container.
*
* Return value: (transfer none): The child actor with the requested name,
* or %NULL if no actor with that name was found.
*
* Since: 0.6
*/
ClutterActor *
clutter_container_find_child_by_name (ClutterContainer *container,
const gchar *child_name)
{
GList *children;
GList *iter;
ClutterActor *actor = NULL;
g_return_val_if_fail (CLUTTER_IS_CONTAINER (container), NULL);
g_return_val_if_fail (child_name != NULL, NULL);
children = clutter_container_get_children (container);
for (iter = children; iter; iter = g_list_next (iter))
{
ClutterActor *a;
const gchar *iter_name;
a = CLUTTER_ACTOR (iter->data);
iter_name = clutter_actor_get_name (a);
if (iter_name && !strcmp (iter_name, child_name))
{
actor = a;
break;
}
if (CLUTTER_IS_CONTAINER (a))
{
ClutterContainer *c = CLUTTER_CONTAINER (a);
actor = clutter_container_find_child_by_name (c, child_name);
if (actor)
break;
}
}
g_list_free (children);
return actor;
}
static ClutterChildMeta *
get_child_meta (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface = CLUTTER_CONTAINER_GET_IFACE (container);
ClutterChildMeta *meta;
if (iface->child_meta_type == G_TYPE_INVALID)
return NULL;
meta = g_object_get_qdata (G_OBJECT (actor), quark_child_meta);
if (meta != NULL && meta->actor == actor)
return meta;
return NULL;
}
static void
create_child_meta (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface = CLUTTER_CONTAINER_GET_IFACE (container);
ClutterChildMeta *child_meta = NULL;
if (iface->child_meta_type == G_TYPE_INVALID)
return;
if (!g_type_is_a (iface->child_meta_type, CLUTTER_TYPE_CHILD_META))
{
g_warning ("%s: Child data of type '%s' is not a ClutterChildMeta",
G_STRLOC, g_type_name (iface->child_meta_type));
return;
}
child_meta = g_object_new (iface->child_meta_type,
"container", container,
"actor", actor,
NULL);
g_object_set_qdata_full (G_OBJECT (actor), quark_child_meta,
child_meta,
(GDestroyNotify) g_object_unref);
}
static void
destroy_child_meta (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (iface->child_meta_type == G_TYPE_INVALID)
return;
g_object_set_qdata (G_OBJECT (actor), quark_child_meta, NULL);
}
/**
* clutter_container_get_child_meta:
* @container: a #ClutterContainer
* @actor: a #ClutterActor that is a child of @container.
*
* Retrieves the #ClutterChildMeta which contains the data about the
* @container specific state for @actor.
*
* Return value: (transfer none): the #ClutterChildMeta for the @actor child
* of @container or %NULL if the specifiec actor does not exist or the
* container is not configured to provide #ClutterChildMeta<!-- -->s
*
* Since: 0.8
*/
ClutterChildMeta *
clutter_container_get_child_meta (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (iface->child_meta_type == G_TYPE_INVALID)
return NULL;
if (G_LIKELY (iface->get_child_meta))
return iface->get_child_meta (container, actor);
return NULL;
}
/**
* clutter_container_create_child_meta:
* @container: a #ClutterContainer
* @actor: a #ClutterActor
*
* Creates the #ClutterChildMeta wrapping @actor inside the
* @container, if the #ClutterContainerIface::child_meta_type
* class member is not set to %G_TYPE_INVALID.
*
* This function is only useful when adding a #ClutterActor to
* a #ClutterContainer implementation outside of the
* #ClutterContainer::add() virtual function implementation.
*
* Applications should not call this function.
*
* Since: 1.2
*/
void
clutter_container_create_child_meta (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (container));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (iface->child_meta_type == G_TYPE_INVALID)
return;
g_assert (g_type_is_a (iface->child_meta_type, CLUTTER_TYPE_CHILD_META));
if (G_LIKELY (iface->create_child_meta))
iface->create_child_meta (container, actor);
}
/**
* clutter_container_destroy_child_meta:
* @container: a #ClutterContainer
* @actor: a #ClutterActor
*
* Destroys the #ClutterChildMeta wrapping @actor inside the
* @container, if any.
*
* This function is only useful when removing a #ClutterActor to
* a #ClutterContainer implementation outside of the
* #ClutterContainer::add() virtual function implementation.
*
* Applications should not call this function.
*
* Since: 1.2
*/
void
clutter_container_destroy_child_meta (ClutterContainer *container,
ClutterActor *actor)
{
ClutterContainerIface *iface;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (iface->child_meta_type == G_TYPE_INVALID)
return;
if (G_LIKELY (iface->destroy_child_meta))
iface->destroy_child_meta (container, actor);
}
/**
* clutter_container_class_find_child_property:
* @klass: a #GObjectClass implementing the #ClutterContainer interface.
* @property_name: a property name.
*
* Looks up the #GParamSpec for a child property of @klass.
*
* Return value: (transfer none): The #GParamSpec for the property or %NULL
* if no such property exist.
*
* Since: 0.8
*/
GParamSpec *
clutter_container_class_find_child_property (GObjectClass *klass,
const gchar *property_name)
{
ClutterContainerIface *iface;
GObjectClass *child_class;
GParamSpec *pspec;
g_return_val_if_fail (G_IS_OBJECT_CLASS (klass), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
g_return_val_if_fail (g_type_is_a (G_TYPE_FROM_CLASS (klass),
CLUTTER_TYPE_CONTAINER),
NULL);
iface = g_type_interface_peek (klass, CLUTTER_TYPE_CONTAINER);
g_return_val_if_fail (iface != NULL, NULL);
if (iface->child_meta_type == G_TYPE_INVALID)
return NULL;
child_class = g_type_class_ref (iface->child_meta_type);
pspec = g_object_class_find_property (child_class, property_name);
g_type_class_unref (child_class);
return pspec;
}
/**
* clutter_container_class_list_child_properties:
* @klass: a #GObjectClass implementing the #ClutterContainer interface.
* @n_properties: return location for length of returned array.
*
* Returns an array of #GParamSpec for all child properties.
*
* Return value: (array length=n_properties) (transfer container): an array
* of #GParamSpec<!-- -->s which should be freed after use.
*
* Since: 0.8
*/
GParamSpec **
clutter_container_class_list_child_properties (GObjectClass *klass,
guint *n_properties)
{
ClutterContainerIface *iface;
GObjectClass *child_class;
GParamSpec **retval;
g_return_val_if_fail (G_IS_OBJECT_CLASS (klass), NULL);
g_return_val_if_fail (g_type_is_a (G_TYPE_FROM_CLASS (klass),
CLUTTER_TYPE_CONTAINER),
NULL);
iface = g_type_interface_peek (klass, CLUTTER_TYPE_CONTAINER);
g_return_val_if_fail (iface != NULL, NULL);
if (iface->child_meta_type == G_TYPE_INVALID)
return NULL;
child_class = g_type_class_ref (iface->child_meta_type);
retval = g_object_class_list_properties (child_class, n_properties);
g_type_class_unref (child_class);
return retval;
}
static inline void
container_set_child_property (ClutterContainer *container,
ClutterActor *actor,
const GValue *value,
GParamSpec *pspec)
{
ClutterChildMeta *data;
ClutterContainerIface *iface;
data = clutter_container_get_child_meta (container, actor);
g_object_set_property (G_OBJECT (data), pspec->name, value);
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (G_LIKELY (iface->child_notify))
iface->child_notify (container, actor, pspec);
}
/**
* clutter_container_child_set_property:
* @container: a #ClutterContainer
* @child: a #ClutterActor that is a child of @container.
* @property: the name of the property to set.
* @value: the value.
*
* Sets a container-specific property on a child of @container.
*
* Since: 0.8
*/
void
clutter_container_child_set_property (ClutterContainer *container,
ClutterActor *child,
const gchar *property,
const GValue *value)
{
GObjectClass *klass;
GParamSpec *pspec;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (child));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
klass = G_OBJECT_GET_CLASS (container);
pspec = clutter_container_class_find_child_property (klass, property);
if (!pspec)
{
g_warning ("%s: Containers of type '%s' have no child "
"property named '%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (container), property);
return;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: Child property '%s' of the container '%s' "
"is not writable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container));
return;
}
container_set_child_property (container, child, value, pspec);
}
/**
* clutter_container_child_set:
* @container: a #ClutterContainer
* @actor: a #ClutterActor that is a child of @container.
* @first_prop: name of the first property to be set.
* @...: value for the first property, followed optionally by more name/value
* pairs terminated with NULL.
*
* Sets container specific properties on the child of a container.
*
* Since: 0.8
*/
void
clutter_container_child_set (ClutterContainer *container,
ClutterActor *actor,
const gchar *first_prop,
...)
{
GObjectClass *klass;
const gchar *name;
va_list var_args;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
klass = G_OBJECT_GET_CLASS (container);
va_start (var_args, first_prop);
name = first_prop;
while (name)
{
GValue value = { 0, };
gchar *error = NULL;
GParamSpec *pspec;
pspec = clutter_container_class_find_child_property (klass, name);
if (!pspec)
{
g_warning ("%s: Containers of type '%s' have no child "
"property named '%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (container), name);
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: Child property '%s' of the container '%s' "
"is not writable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container));
break;
}
#if GLIB_CHECK_VERSION (2, 23, 2)
G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
var_args, 0,
&error);
#else
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&value, var_args, 0, &error);
#endif /* GLIB_CHECK_VERSION (2, 23, 2) */
if (error)
{
/* we intentionally leak the GValue because it might
* be in an undefined state and calling g_value_unset()
* on it might crash
*/
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
container_set_child_property (container, actor, &value, pspec);
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
va_end (var_args);
}
static inline void
container_get_child_property (ClutterContainer *container,
ClutterActor *actor,
GValue *value,
GParamSpec *pspec)
{
ClutterChildMeta *data;
data = clutter_container_get_child_meta (container, actor);
g_object_get_property (G_OBJECT (data), pspec->name, value);
}
/**
* clutter_container_child_get_property:
* @container: a #ClutterContainer
* @child: a #ClutterActor that is a child of @container.
* @property: the name of the property to set.
* @value: the value.
*
* Gets a container specific property of a child of @container, In general,
* a copy is made of the property contents and the caller is responsible for
* freeing the memory by calling g_value_unset().
*
* Note that clutter_container_child_set_property() is really intended for
* language bindings, clutter_container_child_set() is much more convenient
* for C programming.
*
* Since: 0.8
*/
void
clutter_container_child_get_property (ClutterContainer *container,
ClutterActor *child,
const gchar *property,
GValue *value)
{
GObjectClass *klass;
GParamSpec *pspec;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (child));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
klass = G_OBJECT_GET_CLASS (container);
pspec = clutter_container_class_find_child_property (klass, property);
if (!pspec)
{
g_warning ("%s: Containers of type '%s' have no child "
"property named '%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (container), property);
return;
}
if (!(pspec->flags & G_PARAM_READABLE))
{
g_warning ("%s: Child property '%s' of the container '%s' "
"is not writable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container));
return;
}
container_get_child_property (container, child, value, pspec);
}
/**
* clutter_container_child_get:
* @container: a #ClutterContainer
* @actor: a #ClutterActor that is a child of @container.
* @first_prop: name of the first property to be set.
* @...: value for the first property, followed optionally by more name/value
* pairs terminated with NULL.
*
* Gets @container specific properties of an actor.
*
* In general, a copy is made of the property contents and the caller is
* responsible for freeing the memory in the appropriate manner for the type, for
* instance by calling g_free() or g_object_unref().
*
* Since: 0.8
*/
void
clutter_container_child_get (ClutterContainer *container,
ClutterActor *actor,
const gchar *first_prop,
...)
{
GObjectClass *klass;
const gchar *name;
va_list var_args;
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
klass = G_OBJECT_GET_CLASS (container);
va_start (var_args, first_prop);
name = first_prop;
while (name)
{
GValue value = { 0, };
gchar *error = NULL;
GParamSpec *pspec;
pspec = clutter_container_class_find_child_property (klass, name);
if (!pspec)
{
g_warning ("%s: container '%s' has no child property named '%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (container), name);
break;
}
if (!(pspec->flags & G_PARAM_READABLE))
{
g_warning ("%s: child property '%s' of container '%s' is not readable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
container_get_child_property (container, actor, &value, pspec);
G_VALUE_LCOPY (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
g_value_unset (&value);
break;
}
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
va_end (var_args);
}
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