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mutter/clutter/clutter-container.c

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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 child_notify (ClutterContainer *container,
ClutterActor *child,
GParamSpec *pspec);
typedef ClutterContainerIface ClutterContainerInterface;
G_DEFINE_INTERFACE (ClutterContainer, clutter_container, G_TYPE_OBJECT);
static void
clutter_container_default_init (ClutterContainerInterface *iface)
{
GType iface_type = G_TYPE_FROM_INTERFACE (iface);
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
* @pspec: (type GParamSpec): the #GParamSpec of the 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_SIGNAL_DETAILED,
G_STRUCT_OFFSET (ClutterContainerIface, child_notify),
NULL, NULL,
_clutter_marshal_VOID__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;
iface->child_notify = child_notify;
}
/**
* clutter_container_add: (skip)
* @container: a #ClutterContainer
* @first_actor: the first #ClutterActor to add
* @...: %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.
*
* Virtual: add
*
* 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: (skip)
* @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: (skip)
* @container: a #ClutterContainer
* @first_actor: first #ClutterActor to remove
* @...: 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.
*
* Virtual: remove
*
* 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: (skip)
* @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 Clutter.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: (scope call): 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: (scope call): 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: (allow-none): the sibling to raise to, or %NULL to raise
* to the top
*
* Raises @actor to @sibling level, in the depth ordering.
*
* Virtual: raise
*
* 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: (allow-none): the sibling to lower to, or %NULL to lower
* to the bottom
*
* Lowers @actor to @sibling level, in the depth ordering.
*
* Virtual: lower
*
* 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 (actor));
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 full): 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 void
child_notify (ClutterContainer *container,
ClutterActor *actor,
GParamSpec *pspec)
{
}
static inline void
container_set_child_property (ClutterContainer *container,
ClutterActor *actor,
const GValue *value,
GParamSpec *pspec)
{
ClutterChildMeta *data;
data = clutter_container_get_child_meta (container, actor);
g_object_set_property (G_OBJECT (data), pspec->name, value);
g_signal_emit (container, container_signals[CHILD_NOTIFY],
(pspec->flags & G_PARAM_STATIC_NAME)
? g_quark_from_static_string (pspec->name)
: g_quark_from_string (pspec->name),
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;
}
G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
var_args, 0,
&error);
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);
}
/**
* clutter_container_child_notify:
* @container: a #ClutterContainer
* @child: a #ClutterActor
* @pspec: a #GParamSpec
*
* Calls the <function>child_notify()</function> virtual function of
* #ClutterContainer. The default implementation will emit the
* #ClutterContainer::child-notify signal.
*
* Since: 1.6
*/
void
clutter_container_child_notify (ClutterContainer *container,
ClutterActor *child,
GParamSpec *pspec)
{
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
g_return_if_fail (CLUTTER_IS_ACTOR (child));
g_return_if_fail (pspec != NULL);
g_return_if_fail (clutter_actor_get_parent (child) == CLUTTER_ACTOR (container));
CLUTTER_CONTAINER_GET_IFACE (container)->child_notify (container,
child,
pspec);
}
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