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mutter-performance-source/clutter/clutter-transition-group.c
2013-07-03 18:04:32 +01:00

252 lines
7 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2012 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-transition-group
* @Title: ClutterTransitionGroup
* @Short_Description: Group transitions together
*
* The #ClutterTransitionGroup allows running multiple #ClutterTransition
* instances concurrently.
*
* The transitions inside a group will run within the boundaries of the
* group; for instance, if a transition has a duration of 10 seconds, and
* the group that contains it has a duration of 5 seconds, only the first
* 5 seconds of the transition will be played.
*
* #ClutterTransitionGroup is available since Clutter 1.12
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-transition-group.h"
#include "clutter-debug.h"
#include "clutter-private.h"
struct _ClutterTransitionGroupPrivate
{
GHashTable *transitions;
};
G_DEFINE_TYPE_WITH_PRIVATE (ClutterTransitionGroup, clutter_transition_group, CLUTTER_TYPE_TRANSITION)
static void
clutter_transition_group_new_frame (ClutterTimeline *timeline,
gint elapsed)
{
ClutterTransitionGroupPrivate *priv;
GHashTableIter iter;
gpointer element;
gint64 msecs;
priv = CLUTTER_TRANSITION_GROUP (timeline)->priv;
/* get the time elapsed since the last ::new-frame... */
msecs = clutter_timeline_get_delta (timeline);
g_hash_table_iter_init (&iter, priv->transitions);
while (g_hash_table_iter_next (&iter, &element, NULL))
{
ClutterTimeline *t = element;
/* ... and advance every timeline */
clutter_timeline_set_direction (t, clutter_timeline_get_direction (timeline));
clutter_timeline_set_duration (t, clutter_timeline_get_duration (timeline));
_clutter_timeline_advance (t, msecs);
}
}
static void
clutter_transition_group_attached (ClutterTransition *transition,
ClutterAnimatable *animatable)
{
ClutterTransitionGroupPrivate *priv;
GHashTableIter iter;
gpointer element;
priv = CLUTTER_TRANSITION_GROUP (transition)->priv;
g_hash_table_iter_init (&iter, priv->transitions);
while (g_hash_table_iter_next (&iter, &element, NULL))
{
ClutterTransition *t = element;
clutter_transition_set_animatable (t, animatable);
}
}
static void
clutter_transition_group_detached (ClutterTransition *transition,
ClutterAnimatable *animatable)
{
ClutterTransitionGroupPrivate *priv;
GHashTableIter iter;
gpointer element;
priv = CLUTTER_TRANSITION_GROUP (transition)->priv;
g_hash_table_iter_init (&iter, priv->transitions);
while (g_hash_table_iter_next (&iter, &element, NULL))
{
ClutterTransition *t = element;
clutter_transition_set_animatable (t, NULL);
}
}
static void
clutter_transition_group_started (ClutterTimeline *timeline)
{
ClutterTransitionGroupPrivate *priv;
GHashTableIter iter;
gpointer element;
priv = CLUTTER_TRANSITION_GROUP (timeline)->priv;
g_hash_table_iter_init (&iter, priv->transitions);
while (g_hash_table_iter_next (&iter, &element, NULL))
{
ClutterTransition *t = element;
g_signal_emit_by_name (t, "started");
}
}
static void
clutter_transition_group_finalize (GObject *gobject)
{
ClutterTransitionGroupPrivate *priv;
priv = CLUTTER_TRANSITION_GROUP (gobject)->priv;
g_hash_table_unref (priv->transitions);
G_OBJECT_CLASS (clutter_transition_group_parent_class)->finalize (gobject);
}
static void
clutter_transition_group_class_init (ClutterTransitionGroupClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterTimelineClass *timeline_class = CLUTTER_TIMELINE_CLASS (klass);
ClutterTransitionClass *transition_class = CLUTTER_TRANSITION_CLASS (klass);
gobject_class->finalize = clutter_transition_group_finalize;
timeline_class->started = clutter_transition_group_started;
timeline_class->new_frame = clutter_transition_group_new_frame;
transition_class->attached = clutter_transition_group_attached;
transition_class->detached = clutter_transition_group_detached;
}
static void
clutter_transition_group_init (ClutterTransitionGroup *self)
{
self->priv = clutter_transition_group_get_instance_private (self);
self->priv->transitions =
g_hash_table_new_full (NULL, NULL, (GDestroyNotify) g_object_unref, NULL);
}
/**
* clutter_transition_group_new:
*
* Creates a new #ClutterTransitionGroup instance.
*
* Return value: the newly created #ClutterTransitionGroup. Use
* g_object_unref() when done to deallocate the resources it
* uses
*
* Since: 1.12
*/
ClutterTransition *
clutter_transition_group_new (void)
{
return g_object_new (CLUTTER_TYPE_TRANSITION_GROUP, NULL);
}
/**
* clutter_transition_group_add_transition:
* @group: a #ClutterTransitionGroup
* @transition: a #ClutterTransition
*
* Adds @transition to @group.
*
* This function acquires a reference on @transition that will be released
* when calling clutter_transition_group_remove_transition().
*
* Since: 1.12
*/
void
clutter_transition_group_add_transition (ClutterTransitionGroup *group,
ClutterTransition *transition)
{
g_return_if_fail (CLUTTER_IS_TRANSITION_GROUP (group));
g_return_if_fail (CLUTTER_IS_TRANSITION (transition));
g_hash_table_add (group->priv->transitions, g_object_ref (transition));
}
/**
* clutter_transition_group_remove_transition:
* @group: a #ClutterTransitionGroup
* @transition: a #ClutterTransition
*
* Removes @transition from @group.
*
* This function releases the reference acquired on @transition when
* calling clutter_transition_group_add_transition().
*
* Since: 1.12
*/
void
clutter_transition_group_remove_transition (ClutterTransitionGroup *group,
ClutterTransition *transition)
{
g_return_if_fail (CLUTTER_IS_TRANSITION_GROUP (group));
g_hash_table_remove (group->priv->transitions, transition);
}
/**
* clutter_transition_group_remove_all:
* @group: a #ClutterTransitionGroup
*
* Removes all transitions from @group.
*
* This function releases the reference acquired when calling
* clutter_transition_group_add_transition().
*
* Since: 1.12
*/
void
clutter_transition_group_remove_all (ClutterTransitionGroup *group)
{
g_return_if_fail (CLUTTER_IS_TRANSITION_GROUP (group));
g_hash_table_remove_all (group->priv->transitions);
}