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mutter/clutter/clutter-animation.c
Emmanuele Bassi c0adf4582c [docs] Clarify clutter_actor_animate() behaviour 
When calling clutter_actor_animate() on an actor that is being
currently animated the default behaviour is to update the duration
of the animation; the easing mode; update all the common properties;
and finally add the new properties.

This:

  clutter_actor_animate (actor, 500, CLUTTER_LINEAR,
                         "width", 100,
                         "height", 100,
                         NULL);

  clutter_actor_animate (actor, 250, CLUTTER_EASE_IN_CUBIC,
                         "x", 100,
                         "y", 100,
                         "height", 200,
                         NULL);

Is logically equivalent to:

  clutter_actor_animate (actor, 250, CLUTTER_EASE_IN_CUBIC,
                         "x", 100,
                         "y", 100,
                         "width", 100,
                         "height", 200,
                         NULL);

The documentation of the function should be slightly more verbose
in describing the default behaviour.
2009-03-10 12:38:02 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2008 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-animation
* @short_description: Simple implicit animations
*
* #ClutterAnimation is an object providing simple, implicit animations
* for #GObject<!-- -->s.
*
* #ClutterAnimation instances will bind a #GObject property belonging
* to a #GObject to a #ClutterInterval, and will then use a #ClutterTimeline
* to interpolate the property between the initial and final values of the
* interval.
*
* For convenience, it is possible to use the clutter_actor_animate()
* function call which will take care of setting up and tearing down
* a #ClutterAnimation instance and animate an actor between its current
* state and the specified final state.
*
* #ClutterAnimation is available since Clutter 1.0
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib-object.h>
#include <gobject/gvaluecollector.h>
#include "clutter-alpha.h"
#include "clutter-animatable.h"
#include "clutter-animation.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-interval.h"
#include "clutter-private.h"
enum
{
PROP_0,
PROP_OBJECT,
PROP_MODE,
PROP_DURATION,
PROP_LOOP,
PROP_TIMELINE,
PROP_ALPHA
};
enum
{
COMPLETED,
LAST_SIGNAL
};
#define CLUTTER_ANIMATION_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_ANIMATION, ClutterAnimationPrivate))
struct _ClutterAnimationPrivate
{
GObject *object;
GHashTable *properties;
gulong mode;
guint loop : 1;
guint duration;
ClutterTimeline *timeline;
guint timeline_completed_id;
ClutterAlpha *alpha;
guint alpha_notify_id;
};
static guint animation_signals[LAST_SIGNAL] = { 0, };
static GQuark quark_object_animation = 0;
G_DEFINE_TYPE (ClutterAnimation, clutter_animation, G_TYPE_INITIALLY_UNOWNED);
static void on_animation_weak_notify (gpointer data,
GObject *animation_pointer);
static void
clutter_animation_finalize (GObject *gobject)
{
ClutterAnimationPrivate *priv = CLUTTER_ANIMATION (gobject)->priv;
g_hash_table_destroy (priv->properties);
G_OBJECT_CLASS (clutter_animation_parent_class)->finalize (gobject);
}
static void
clutter_animation_dispose (GObject *gobject)
{
ClutterAnimationPrivate *priv = CLUTTER_ANIMATION (gobject)->priv;
if (priv->object)
{
g_object_weak_unref (G_OBJECT (gobject),
on_animation_weak_notify,
priv->object);
g_object_set_qdata (priv->object, quark_object_animation, NULL);
g_object_unref (priv->object);
priv->object = NULL;
}
if (priv->timeline)
{
if (priv->timeline_completed_id)
{
g_signal_handler_disconnect (priv->timeline,
priv->timeline_completed_id);
priv->timeline_completed_id = 0;
}
g_object_unref (priv->timeline);
priv->timeline = NULL;
}
if (priv->alpha)
{
if (priv->alpha_notify_id)
{
g_signal_handler_disconnect (priv->alpha, priv->alpha_notify_id);
priv->alpha_notify_id = 0;
}
g_object_unref (priv->alpha);
priv->alpha = NULL;
}
G_OBJECT_CLASS (clutter_animation_parent_class)->dispose (gobject);
}
static void
clutter_animation_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterAnimation *animation = CLUTTER_ANIMATION (gobject);
switch (prop_id)
{
case PROP_OBJECT:
clutter_animation_set_object (animation, g_value_get_object (value));
break;
case PROP_MODE:
clutter_animation_set_mode (animation, g_value_get_ulong (value));
break;
case PROP_DURATION:
clutter_animation_set_duration (animation, g_value_get_uint (value));
break;
case PROP_LOOP:
clutter_animation_set_loop (animation, g_value_get_boolean (value));
break;
case PROP_TIMELINE:
clutter_animation_set_timeline (animation, g_value_get_object (value));
break;
case PROP_ALPHA:
clutter_animation_set_alpha (animation, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_animation_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterAnimationPrivate *priv = CLUTTER_ANIMATION (gobject)->priv;
switch (prop_id)
{
case PROP_OBJECT:
g_value_set_object (value, priv->object);
break;
case PROP_MODE:
g_value_set_ulong (value, priv->mode);
break;
case PROP_DURATION:
g_value_set_uint (value, priv->duration);
break;
case PROP_LOOP:
g_value_set_boolean (value, priv->loop);
break;
case PROP_TIMELINE:
g_value_set_object (value, priv->timeline);
break;
case PROP_ALPHA:
g_value_set_object (value, priv->alpha);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_animation_real_completed (ClutterAnimation *animation)
{
CLUTTER_NOTE (ANIMATION, "Animation [%p] complete: unreffing",
animation);
g_object_unref (animation);
}
static void
clutter_animation_class_init (ClutterAnimationClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
quark_object_animation =
g_quark_from_static_string ("clutter-actor-animation");
g_type_class_add_private (klass, sizeof (ClutterAnimationPrivate));
klass->completed = clutter_animation_real_completed;
gobject_class->set_property = clutter_animation_set_property;
gobject_class->get_property = clutter_animation_get_property;
gobject_class->dispose = clutter_animation_dispose;
gobject_class->finalize = clutter_animation_finalize;
/**
* ClutterAnimation:objct:
*
* The #GObject to which the animation applies.
*
* Since: 1.0
*/
pspec = g_param_spec_object ("object",
"Object",
"Object to which the animation applies",
G_TYPE_OBJECT,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_OBJECT, pspec);
/**
* ClutterAnimation:mode:
*
* The animation mode, either a value from #ClutterAnimationMode
* or a value returned by clutter_alpha_register_func(). The
* default value is %CLUTTER_LINEAR.
*
* Since: 1.0
*/
pspec = g_param_spec_ulong ("mode",
"Mode",
"The mode of the animation",
0, G_MAXULONG,
CLUTTER_LINEAR,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_MODE, pspec);
/**
* ClutterAnimation:duration:
*
* The duration of the animation, expressed in milliseconds.
*
* Since: 1.0
*/
pspec = g_param_spec_uint ("duration",
"Duration",
"Duration of the animation, in milliseconds",
0, G_MAXUINT, 0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_DURATION, pspec);
/**
* ClutterAnimation:loop:
*
* Whether the animation should loop.
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("loop",
"Loop",
"Whether the animation should loop",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_LOOP, pspec);
/**
* ClutterAnimation:timeline:
*
* The #ClutterTimeline used by the animation.
*
* Since: 1.0
*/
pspec = g_param_spec_object ("timeline",
"Timeline",
"The timeline used by the animation",
CLUTTER_TYPE_TIMELINE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_TIMELINE, pspec);
/**
* ClutterAnimation:alpha:
*
* The #ClutterAlpha used by the animation.
*
* Since: 1.0
*/
pspec = g_param_spec_object ("alpha",
"Alpha",
"The alpha used by the animation",
CLUTTER_TYPE_ALPHA,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_ALPHA, pspec);
/**
* ClutterAniamtion::completed:
* @animation: the animation that emitted the signal
*
* The ::completed signal is emitted once the animation has
* been completed.
*
* Since: 1.0
*/
animation_signals[COMPLETED] =
g_signal_new (I_("completed"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterAnimationClass, completed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
clutter_animation_init (ClutterAnimation *self)
{
self->priv = CLUTTER_ANIMATION_GET_PRIVATE (self);
self->priv->mode = CLUTTER_LINEAR;
self->priv->properties =
g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) g_object_unref);
}
static inline void
clutter_animation_bind_property_internal (ClutterAnimation *animation,
GParamSpec *pspec,
ClutterInterval *interval)
{
ClutterAnimationPrivate *priv = animation->priv;
if (!clutter_interval_validate (interval, pspec))
{
g_warning ("Cannot bind property `%s': the interval is out "
"of bounds",
pspec->name);
return;
}
g_hash_table_insert (priv->properties,
g_strdup (pspec->name),
g_object_ref_sink (interval));
}
static inline void
clutter_animation_update_property_internal (ClutterAnimation *animation,
GParamSpec *pspec,
ClutterInterval *interval)
{
ClutterAnimationPrivate *priv = animation->priv;
if (!clutter_interval_validate (interval, pspec))
{
g_warning ("Cannot bind property `%s': the interval is out "
"of bounds",
pspec->name);
return;
}
g_hash_table_replace (priv->properties,
g_strdup (pspec->name),
g_object_ref_sink (interval));
}
/**
* clutter_animation_bind_property:
* @animation: a #ClutterAnimation
* @property_name: the property to control
* @interval: a #ClutterInterval
*
* Binds @interval to the @property_name of the #GObject
* attached to @animation. The #ClutterAnimation will take
* ownership of the passed #ClutterInterval.
*
* If you need to update the interval instance use
* clutter_animation_update_property() instead.
*
* Since: 1.0
*/
void
clutter_animation_bind_property (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval)
{
ClutterAnimationPrivate *priv;
GObjectClass *klass;
GParamSpec *pspec;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (property_name != NULL);
g_return_if_fail (CLUTTER_IS_INTERVAL (interval));
priv = animation->priv;
if (G_UNLIKELY (!priv->object))
{
g_warning ("Cannot bind property `%s': the animation has no "
"object set. You need to call clutter_animation_set_object() "
"first to be able to bind a property",
property_name);
return;
}
if (G_UNLIKELY (clutter_animation_has_property (animation, property_name)))
{
g_warning ("Cannot bind property `%s': the animation already has "
"a bound property with the same name",
property_name);
return;
}
klass = G_OBJECT_GET_CLASS (priv->object);
pspec = g_object_class_find_property (klass, property_name);
if (!pspec)
{
g_warning ("Cannot bind property `%s': objects of type `%s' have "
"no such property",
property_name,
g_type_name (G_OBJECT_TYPE (priv->object)));
return;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("Cannot bind property `%s': the property is not writable",
property_name);
return;
}
if (!g_value_type_compatible (G_PARAM_SPEC_VALUE_TYPE (pspec),
clutter_interval_get_value_type (interval)))
{
g_warning ("Cannot bind property `%s': the interval value of "
"type `%s' is not compatible with the property value "
"of type `%s'",
property_name,
g_type_name (clutter_interval_get_value_type (interval)),
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
return;
}
clutter_animation_bind_property_internal (animation, pspec, interval);
}
/**
* clutter_animation_unbind_property:
* @animation: a #ClutterAnimation
* @property_name: name of the property
*
* Removes @property_name from the list of animated properties.
*
* Since: 1.0
*/
void
clutter_animation_unbind_property (ClutterAnimation *animation,
const gchar *property_name)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (property_name != NULL);
priv = animation->priv;
if (!clutter_animation_has_property (animation, property_name))
{
g_warning ("Cannot unbind property `%s': the animation has "
"no bound property with that name",
property_name);
return;
}
g_hash_table_remove (priv->properties, property_name);
}
/**
* clutter_animation_has_property:
* @animation: a #ClutterAnimation
* @property_name: name of the property
*
* Checks whether @animation is controlling @property_name.
*
* Return value: %TRUE if the property is animated by the
* #ClutterAnimation, %FALSE otherwise
*
* Since: 1.0
*/
gboolean
clutter_animation_has_property (ClutterAnimation *animation,
const gchar *property_name)
{
ClutterAnimationPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), FALSE);
g_return_val_if_fail (property_name != NULL, FALSE);
priv = animation->priv;
return g_hash_table_lookup (priv->properties, property_name) != NULL;
}
/**
* clutter_animation_update_property:
* @animation: a #ClutterAnimation
* @property_name: name of the property
* @interval: a #ClutterInterval
*
* Changes the @interval for @property_name. The #ClutterAnimation
* will take ownership of the passed #ClutterInterval.
*
* Since: 1.0
*/
void
clutter_animation_update_property (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval)
{
ClutterAnimationPrivate *priv;
GObjectClass *klass;
GParamSpec *pspec;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (property_name != NULL);
g_return_if_fail (CLUTTER_IS_INTERVAL (interval));
priv = animation->priv;
if (!clutter_animation_has_property (animation, property_name))
{
g_warning ("Cannot unbind property `%s': the animation has "
"no bound property with that name",
property_name);
return;
}
klass = G_OBJECT_GET_CLASS (priv->object);
pspec = g_object_class_find_property (klass, property_name);
if (!pspec)
{
g_warning ("Cannot bind property `%s': objects of type `%s' have "
"no such property",
property_name,
g_type_name (G_OBJECT_TYPE (priv->object)));
return;
}
if (!g_value_type_compatible (G_PARAM_SPEC_VALUE_TYPE (pspec),
clutter_interval_get_value_type (interval)))
{
g_warning ("Cannot bind property `%s': the interval value of "
"type `%s' is not compatible with the property value "
"of type `%s'",
property_name,
g_type_name (clutter_interval_get_value_type (interval)),
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
return;
}
clutter_animation_update_property_internal (animation, pspec, interval);
}
/**
* clutter_animation_get_interval:
* @animation: a #ClutterAnimation
* @property_name: name of the property
*
* Retrieves the #ClutterInterval associated to @property_name
* inside @animation.
*
* Return value: (transfer none): a #ClutterInterval or %NULL if no
* property with the same name was found. The returned interval is
* owned by the #ClutterAnimation and should not be unreferenced
*
* Since: 1.0
*/
ClutterInterval *
clutter_animation_get_interval (ClutterAnimation *animation,
const gchar *property_name)
{
ClutterAnimationPrivate *priv;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
priv = animation->priv;
return g_hash_table_lookup (priv->properties, property_name);
}
static void
on_timeline_completed (ClutterTimeline *timeline,
ClutterAnimation *animation)
{
CLUTTER_NOTE (ANIMATION, "Timeline [%p] complete", timeline);
if (!animation->priv->loop)
g_signal_emit (animation, animation_signals[COMPLETED], 0);
}
static void
on_alpha_notify (GObject *gobject,
GParamSpec *pspec,
ClutterAnimation *animation)
{
ClutterAnimationPrivate *priv = animation->priv;
GList *properties, *p;
gdouble alpha_value;
gboolean is_animatable = FALSE;
ClutterAnimatable *animatable = NULL;
alpha_value = clutter_alpha_get_alpha (CLUTTER_ALPHA (gobject));
if (CLUTTER_IS_ANIMATABLE (priv->object))
{
animatable = CLUTTER_ANIMATABLE (priv->object);
is_animatable = TRUE;
}
g_object_freeze_notify (priv->object);
properties = g_hash_table_get_keys (priv->properties);
for (p = properties; p != NULL; p = p->next)
{
const gchar *p_name = p->data;
ClutterInterval *interval;
GValue value = { 0, };
interval = g_hash_table_lookup (priv->properties, p_name);
g_assert (CLUTTER_IS_INTERVAL (interval));
g_value_init (&value, clutter_interval_get_value_type (interval));
if (is_animatable)
{
const GValue *initial, *final;
initial = clutter_interval_peek_initial_value (interval);
final = clutter_interval_peek_final_value (interval);
CLUTTER_NOTE (ANIMATION, "Animatable property `%s'", p_name);
clutter_animatable_animate_property (animatable, animation,
p_name,
initial, final,
alpha_value,
&value);
g_object_set_property (priv->object, p_name, &value);
}
else
{
CLUTTER_NOTE (ANIMATION, "Standard property `%s'", p_name);
if (clutter_interval_compute_value (interval, alpha_value, &value))
g_object_set_property (priv->object, p_name, &value);
}
g_value_unset (&value);
}
g_list_free (properties);
g_object_thaw_notify (priv->object);
}
/*
* Removes the animation pointer from the qdata section of the
* actor attached to the animation
*/
static void
on_animation_weak_notify (gpointer data,
GObject *animation_pointer)
{
GObject *actor = data;
CLUTTER_NOTE (ANIMATION, "Removing Animation from actor %d[%p]",
clutter_actor_get_gid (CLUTTER_ACTOR (actor)),
actor);
g_object_set_qdata (actor, quark_object_animation, NULL);
}
ClutterAnimation *
clutter_animation_new (void)
{
return g_object_new (CLUTTER_TYPE_ANIMATION, NULL);
}
/**
* clutter_animation_set_object:
* @animation: a #ClutterAnimation
* @object: a #GObject
*
* Attaches @animation to @object. The #ClutterAnimation will take a
* reference on @object.
*
* Since: 1.0
*/
void
clutter_animation_set_object (ClutterAnimation *animation,
GObject *object)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (G_IS_OBJECT (object));
priv = animation->priv;
g_object_ref (object);
if (priv->object)
{
g_object_weak_unref (G_OBJECT (animation),
on_animation_weak_notify,
priv->object);
g_object_set_qdata (priv->object, quark_object_animation, NULL);
g_object_unref (priv->object);
}
priv->object = object;
g_object_weak_ref (G_OBJECT (animation),
on_animation_weak_notify,
priv->object);
g_object_set_qdata (G_OBJECT (priv->object),
quark_object_animation,
animation);
g_object_notify (G_OBJECT (animation), "object");
}
/**
* clutter_animation_get_object:
* @animation: a #ClutterAnimation
*
* Retrieves the #GObject attached to @animation.
*
* Return value: (transfer none): a #GObject
*
* Since: 1.0
*/
GObject *
clutter_animation_get_object (ClutterAnimation *animation)
{
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
return animation->priv->object;
}
static inline void
clutter_animation_set_mode_internal (ClutterAnimation *animation,
ClutterAlpha *alpha)
{
ClutterAnimationPrivate *priv = animation->priv;
if (alpha)
clutter_alpha_set_mode (alpha, priv->mode);
}
/**
* clutter_animation_set_mode:
* @animation: a #ClutterAnimation
* @mode: an animation mode logical id
*
* Sets the animation @mode of @animation. The animation @mode is
* a logical id, either coming from the #ClutterAnimationMode enumeration
* or the return value of clutter_alpha_register_func().
*
* Since: 1.0
*/
void
clutter_animation_set_mode (ClutterAnimation *animation,
gulong mode)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
priv = animation->priv;
priv->mode = mode;
clutter_animation_set_mode_internal (animation, priv->alpha);
g_object_notify (G_OBJECT (animation), "mode");
}
/**
* clutter_animation_get_mode:
* @animation: a #ClutterAnimation
*
* Retrieves the animation mode of @animation, as set by
* clutter_animation_set_mode().
*
* Return value: the mode for the animation
*
* Since: 1.0
*/
gulong
clutter_animation_get_mode (ClutterAnimation *animation)
{
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), CLUTTER_LINEAR);
return animation->priv->mode;
}
/**
* clutter_animation_set_duration:
* @animation: a #ClutterAnimation
* @msecs: the duration in milliseconds
*
* Sets the duration of @animation in milliseconds.
*
* Since: 1.0
*/
void
clutter_animation_set_duration (ClutterAnimation *animation,
gint msecs)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
priv = animation->priv;
priv->duration = msecs;
if (priv->timeline)
{
gboolean was_playing;
was_playing = clutter_timeline_is_playing (priv->timeline);
if (was_playing)
clutter_timeline_stop (priv->timeline);
clutter_timeline_set_duration (priv->timeline, msecs);
if (was_playing)
clutter_timeline_start (priv->timeline);
}
g_object_notify (G_OBJECT (animation), "duration");
}
/**
* clutter_animation_set_loop:
* @animation: a #ClutterAnimation
* @loop: %TRUE if the animation should loop
*
* Sets whether @animation should loop over itself once finished.
*
* A looping #ClutterAnimation will not emit the #ClutterAnimation::completed
* signal when finished.
*
* Since: 1.0
*/
void
clutter_animation_set_loop (ClutterAnimation *animation,
gboolean loop)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
priv = animation->priv;
if (priv->loop != loop)
{
priv->loop = loop;
if (priv->timeline)
clutter_timeline_set_loop (priv->timeline, priv->loop);
g_object_notify (G_OBJECT (animation), "loop");
}
}
/**
* clutter_animation_get_loop:
* @animation: a #ClutterAnimation
*
* Retrieves whether @animation is looping.
*
* Return value: %TRUE if the animation is looping
*
* Since: 1.0
*/
gboolean
clutter_animation_get_loop (ClutterAnimation *animation)
{
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), FALSE);
return animation->priv->loop;
}
/**
* clutter_animation_get_duration:
* @animation: a #ClutterAnimation
*
* Retrieves the duration of @animation, in milliseconds.
*
* Return value: the duration of the animation
*
* Since: 1.0
*/
guint
clutter_animation_get_duration (ClutterAnimation *animation)
{
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), 0);
return animation->priv->duration;
}
/**
* clutter_animation_set_timeline:
* @animation: a #ClutterAnimation
* @timeline: a #ClutterTimeline or %NULL
*
* Sets the #ClutterTimeline used by @animation.
*
* The #ClutterAnimation:duration and #ClutterAnimation:loop properties
* will be set using the corresponding #ClutterTimeline properties as a
* side effect.
*
* If @timeline is %NULL a new #ClutterTimeline will be constructed
* using the current values of the #ClutterAnimation:duration and
* #ClutterAnimation:loop properties.
*
* Since: 1.0
*/
void
clutter_animation_set_timeline (ClutterAnimation *animation,
ClutterTimeline *timeline)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (timeline == NULL || CLUTTER_IS_TIMELINE (timeline));
priv = animation->priv;
if (timeline && priv->timeline == timeline)
return;
g_object_freeze_notify (G_OBJECT (animation));
if (priv->timeline)
{
if (priv->timeline_completed_id)
g_signal_handler_disconnect (priv->timeline,
priv->timeline_completed_id);
g_object_unref (priv->timeline);
priv->timeline_completed_id = 0;
priv->timeline = 0;
}
if (!timeline)
timeline = g_object_new (CLUTTER_TYPE_TIMELINE,
"duration", priv->duration,
"loop", priv->loop,
NULL);
else
{
priv->duration = clutter_timeline_get_duration (timeline);
g_object_notify (G_OBJECT (animation), "duration");
priv->loop = clutter_timeline_get_loop (timeline);
g_object_notify (G_OBJECT (animation), "loop");
}
priv->timeline = g_object_ref (timeline);
g_object_notify (G_OBJECT (animation), "timeline");
priv->timeline_completed_id =
g_signal_connect (timeline, "completed",
G_CALLBACK (on_timeline_completed),
animation);
g_object_thaw_notify (G_OBJECT (animation));
}
/**
* clutter_animation_get_timeline:
* @animation: a #ClutterAnimation
*
* Retrieves the #ClutterTimeline used by @animation
*
* Return value: (transfer none): the timeline used by the animation
*
* Since: 1.0
*/
ClutterTimeline *
clutter_animation_get_timeline (ClutterAnimation *animation)
{
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
return animation->priv->timeline;
}
/**
* clutter_animation_set_alpha:
* @animation: a #ClutterAnimation
* @alpha: a #ClutterAlpha, or %NULL
*
* Sets @alpha as the #ClutterAlpha used by @animation.
*
* If @alpha is %NULL, a new #ClutterAlpha will be constructed from
* the current values of the #ClutterAnimation:mode and
* #ClutterAnimation:timeline properties.
*
* Since: 1.0
*/
void
clutter_animation_set_alpha (ClutterAnimation *animation,
ClutterAlpha *alpha)
{
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha));
priv = animation->priv;
if (!alpha)
{
ClutterTimeline *timeline;
timeline = clutter_animation_get_timeline (animation);
alpha = clutter_alpha_new ();
clutter_alpha_set_timeline (alpha, timeline);
clutter_animation_set_mode_internal (animation, alpha);
}
g_object_ref_sink (alpha);
if (priv->alpha)
{
if (priv->alpha_notify_id)
g_signal_handler_disconnect (priv->alpha, priv->alpha_notify_id);
g_object_unref (priv->alpha);
priv->alpha_notify_id = 0;
priv->alpha = NULL;
}
priv->alpha = alpha;
priv->alpha_notify_id =
g_signal_connect (alpha, "notify::alpha",
G_CALLBACK (on_alpha_notify),
animation);
}
/**
* clutter_animation_get_alpha:
* @animation: a #ClutterAnimation
*
* Retrieves the #ClutterAlpha used by @animation.
*
* Return value: (transfer none): the alpha object used by the animation
*
* Since: 1.0
*/
ClutterAlpha *
clutter_animation_get_alpha (ClutterAnimation *animation)
{
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
return animation->priv->alpha;
}
/*
* starts the timeline
*/
static void
clutter_animation_start (ClutterAnimation *animation)
{
if (animation->priv->timeline)
clutter_timeline_start (animation->priv->timeline);
else
{
/* sanity check */
g_warning (G_STRLOC ": no timeline found, unable to start the animation");
}
}
static inline void
clutter_animation_setup_valist (ClutterAnimation *animation,
const gchar *first_property_name,
va_list var_args)
{
ClutterAnimationPrivate *priv = animation->priv;
GObjectClass *klass;
const gchar *property_name;
klass = G_OBJECT_GET_CLASS (priv->object);
property_name = first_property_name;
while (property_name != NULL)
{
GValue final = { 0, };
GParamSpec *pspec = NULL;
gboolean is_fixed = FALSE;
gchar *error = NULL;
/* fixed properties will not be animated */
if (g_str_has_prefix (property_name, "fixed::"))
{
is_fixed = TRUE;
property_name += 7;
}
pspec = g_object_class_find_property (klass, property_name);
if (!pspec)
{
g_warning ("Cannot bind property `%s': objects of type `%s' do "
"not have this property",
property_name,
g_type_name (G_OBJECT_TYPE (priv->object)));
break;
}
if (pspec->flags & G_PARAM_CONSTRUCT_ONLY)
{
g_warning ("Cannot bind property `%s': the property is "
"construct-only",
property_name);
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("Cannot bind property `%s': the property is "
"not writable",
property_name);
break;
}
g_value_init (&final, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&final, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
/* create an interval and bind it to the property, in case
* it's not a fixed property, otherwise just set it
*/
if (G_LIKELY (!is_fixed))
{
ClutterInterval *interval;
GValue initial = { 0, };
g_value_init (&initial, G_PARAM_SPEC_VALUE_TYPE (pspec));
g_object_get_property (priv->object, property_name, &initial);
interval =
clutter_interval_new_with_values (G_PARAM_SPEC_VALUE_TYPE (pspec),
&initial,
&final);
if (!clutter_animation_has_property (animation, pspec->name))
clutter_animation_bind_property_internal (animation,
pspec,
interval);
else
clutter_animation_update_property_internal (animation,
pspec,
interval);
g_value_unset (&initial);
}
else
g_object_set_property (priv->object, property_name, &final);
g_value_unset (&final);
property_name = va_arg (var_args, gchar*);
}
/* start the animation by default */
clutter_animation_start (animation);
}
/**
* clutter_actor_animate_with_alpha:
* @actor: a #ClutterActor
* @alpha: a #ClutterAlpha
* @first_property_name: the name of a property
* @VarArgs: a %NULL terminated list of property names and
* property values
*
* Animates the given list of properties of @actor between the current
* value for each property and a new final value. The animation has a
* definite behaviour given by the passed @alpha.
*
* See clutter_actor_animate() for further details.
*
* This function is useful if you want to use an existing #ClutterAlpha
* to animate @actor.
*
* Return value: (transfer none): a #ClutterAnimation object. The object is owned by the
* #ClutterActor and should not be unreferenced with g_object_unref()
*
* Since: 1.0
*/
ClutterAnimation *
clutter_actor_animate_with_alpha (ClutterActor *actor,
ClutterAlpha *alpha,
const gchar *first_property_name,
...)
{
ClutterAnimation *animation;
ClutterTimeline *timeline;
va_list args;
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), NULL);
g_return_val_if_fail (first_property_name != NULL, NULL);
timeline = clutter_alpha_get_timeline (alpha);
if (G_UNLIKELY (!timeline))
{
g_warning ("The passed ClutterAlpha does not have an "
"associated ClutterTimeline.");
return NULL;
}
animation = g_object_get_qdata (G_OBJECT (actor), quark_object_animation);
if (G_LIKELY (!animation))
{
animation = clutter_animation_new ();
CLUTTER_NOTE (ANIMATION, "Created new Animation [%p]", animation);
}
else
CLUTTER_NOTE (ANIMATION, "Reusing Animation [%p]", animation);
clutter_animation_set_timeline (animation, timeline);
clutter_animation_set_alpha (animation, alpha);
clutter_animation_set_object (animation, G_OBJECT (actor));
va_start (args, first_property_name);
clutter_animation_setup_valist (animation, first_property_name, args);
va_end (args);
return animation;
}
/**
* clutter_actor_animate_with_timeline:
* @actor: a #ClutterActor
* @mode: an animation mode logical id
* @timeline: a #ClutterTimeline
* @first_property_name: the name of a property
* @VarArgs: a %NULL terminated list of property names and
* property values
*
* Animates the given list of properties of @actor between the current
* value for each property and a new final value. The animation has a
* definite duration given by @timeline and a speed given by the @mode.
*
* See clutter_actor_animate() for further details.
*
* This function is useful if you want to use an existing timeline
* to animate @actor.
*
* Return value: (transfer none): a #ClutterAnimation object. The object is
* owned by the #ClutterActor and should not be unreferenced with
* g_object_unref()
*
* Since: 1.0
*/
ClutterAnimation *
clutter_actor_animate_with_timeline (ClutterActor *actor,
gulong mode,
ClutterTimeline *timeline,
const gchar *first_property_name,
...)
{
ClutterAnimation *animation;
va_list args;
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
g_return_val_if_fail (CLUTTER_IS_TIMELINE (timeline), NULL);
g_return_val_if_fail (first_property_name != NULL, NULL);
animation = g_object_get_qdata (G_OBJECT (actor), quark_object_animation);
if (G_LIKELY (!animation))
{
animation = clutter_animation_new ();
CLUTTER_NOTE (ANIMATION, "Created new Animation [%p]", animation);
}
else
CLUTTER_NOTE (ANIMATION, "Reusing Animation [%p]", animation);
clutter_animation_set_timeline (animation, timeline);
clutter_animation_set_alpha (animation, NULL);
clutter_animation_set_mode (animation, mode);
clutter_animation_set_object (animation, G_OBJECT (actor));
va_start (args, first_property_name);
clutter_animation_setup_valist (animation, first_property_name, args);
va_end (args);
return animation;
}
/**
* clutter_actor_animate:
* @actor: a #ClutterActor
* @mode: an animation mode logical id
* @duration: duration of the animation, in milliseconds
* @first_property_name: the name of a property
* @VarArgs: a %NULL terminated list of property names and
* property values
*
* Animates the given list of properties of @actor between the current
* value for each property and a new final value. The animation has a
* definite duration and a speed given by the @mode.
*
* For example, this:
*
* |[
* clutter_actor_animate (rectangle, CLUTTER_LINEAR, 250,
* "width", 100,
* "height", 100,
* NULL);
* ]|
*
* will make width and height properties of the #ClutterActor "rectangle"
* grow linearly between the current value and 100 pixels, in 250 milliseconds.
*
* The animation @mode is a logical id, either from the #ClutterAnimationMode
* enumeration of from clutter_alpha_register_func().
*
* All the properties specified will be animated between the current value
* and the final value. If a property should be set at the beginning of
* the animation but not updated during the animation, it should be prefixed
* by the "fixed::" string, for instance:
*
* |[
* clutter_actor_animate (actor, CLUTTER_EASE_IN, 100,
* "rotation-angle-z", 360,
* "fixed::rotation-center-x", 100,
* "fixed::rotation-center-y", 100,
* NULL);
* ]|
*
* Will animate the "rotation-angle-z" property between the current value
* and 360 degrees, and set the "rotation-center-x" and "rotation-center-y"
* to the fixed value of 100 pixels.
*
* This function will implicitly create a #ClutterAnimation object which
* will be assigned to the @actor and will be returned to the developer
* to control the animation or to know when the animation has been
* completed.
*
* Calling this function on an actor that is already being animated
* will cause the current animation to change with the new final values,
* the new easing mode and the new duration - that is, this code:
*
* |[
* clutter_actor_animate (actor, 250, CLUTTER_LINEAR,
* "width", 100,
* "height", 100,
* NULL);
* clutter_actor_animate (actor, 500, CLUTTER_EASE_IN_CUBIC,
* "x", 100,
* "y", 100,
* "width", 200,
* NULL);
* ]|
*
* is the equivalent of:
*
* |[
* clutter_actor_animate (actor, 500, CLUTTER_EASE_IN_CUBIC,
* "x", 100,
* "y", 100,
* "width", 200,
* "height", 100,
* NULL);
* ]|
*
* <note>Unless the animation is looping, it will become invalid as soon
* as it is complete. To avoid this, you should keep a reference on the
* returned value using g_object_ref().</note>
*
* Return value: (transfer none): a #ClutterAnimation object. The object is
* owned by the #ClutterActor and should not be unreferenced with
* g_object_unref()
*
* Since: 1.0
*/
ClutterAnimation *
clutter_actor_animate (ClutterActor *actor,
gulong mode,
guint duration,
const gchar *first_property_name,
...)
{
ClutterAnimation *animation;
va_list args;
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
g_return_val_if_fail (mode != CLUTTER_CUSTOM_MODE, NULL);
g_return_val_if_fail (duration > 0, NULL);
g_return_val_if_fail (first_property_name != NULL, NULL);
animation = g_object_get_qdata (G_OBJECT (actor), quark_object_animation);
if (G_LIKELY (!animation))
{
/* if there is no animation already attached to the actor,
* create one and set up the timeline and alpha using the
* current values for duration, mode and loop
*/
animation = clutter_animation_new ();
clutter_animation_set_timeline (animation, NULL);
clutter_animation_set_alpha (animation, NULL);
clutter_animation_set_object (animation, G_OBJECT (actor));
CLUTTER_NOTE (ANIMATION, "Created new Animation [%p]", animation);
}
else
CLUTTER_NOTE (ANIMATION, "Reusing Animation [%p]", animation);
/* force the update of duration and mode using the new
* values coming from the parameters of this function
*/
clutter_animation_set_duration (animation, duration);
clutter_animation_set_mode (animation, mode);
va_start (args, first_property_name);
clutter_animation_setup_valist (animation, first_property_name, args);
va_end (args);
return animation;
}
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