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mutter/clutter/clutter-animation.c
Emmanuele Bassi b5109e852a animation: Use the timeline's new-frame signal 
Instead of using the ClutterAlpha's notify::alpha. This makes the code
less dependent on GObject's property notification.
2011-10-07 16:56:21 +01:00

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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
* @See_Also: #ClutterAnimatable, #ClutterInterval, #ClutterAlpha,
* #ClutterTimeline
*
* #ClutterAnimation is an object providing simple, implicit animations
* for #GObject<!-- -->s.
*
* #ClutterAnimation instances will bind one or more #GObject properties
* belonging to a #GObject to a #ClutterInterval, and will then use a
* #ClutterAlpha to interpolate the property between the initial and final
* values of the interval.
*
* The duration of the animation is set using clutter_animation_set_duration().
* The easing mode of the animation is set using clutter_animation_set_mode().
*
* If you want to control the animation you should retrieve the
* #ClutterTimeline using clutter_animation_get_timeline() and then
* use #ClutterTimeline functions like clutter_timeline_start(),
* clutter_timeline_pause() or clutter_timeline_stop().
*
* A #ClutterAnimation will emit the #ClutterAnimation::completed signal
* when the #ClutterTimeline used by the animation is completed; unlike
* #ClutterTimeline, though, the #ClutterAnimation::completed will not be
* emitted if #ClutterAnimation:loop is set to %TRUE - that is, a looping
* animation never completes.
*
* If your animation depends on user control you can force its completion
* using clutter_animation_completed().
*
* If the #GObject instance bound to a #ClutterAnimation implements the
* #ClutterAnimatable interface it is possible for that instance to
* control the way the initial and final states are interpolated.
*
* #ClutterAnimation<!-- -->s are distinguished from #ClutterBehaviour<!-- -->s
* because the former can only control #GObject properties of a single
* #GObject instance, while the latter can control multiple properties
* using accessor functions inside the #ClutterBehaviour
* <function>alpha_notify</function> virtual function, and can control
* multiple #ClutterActor<!-- -->s as well.
*
* 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.
*
* <refsect2 id="clutter-AnimationMode-Script">
* <title>Defining ClutterAnimationMode inside ClutterScript</title>
* <para>When defining a #ClutterAnimation inside a ClutterScript
* file or string the #ClutterAnimation:mode can be defined either
* using the #ClutterAnimationMode enumeration values through their
* "nick" (the short string used inside #GEnumValue), their numeric
* id, or using the following strings:</para>
* <variablelist>
* <varlistentry>
* <term>easeInQuad, easeOutQuad, easeInOutQuad</term>
* <listitem><para>Corresponding to the quadratic easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInCubic, easeOutCubic, easeInOutCubic</term>
* <listitem><para>Corresponding to the cubic easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInQuart, easeOutQuart, easeInOutQuart</term>
* <listitem><para>Corresponding to the quartic easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInQuint, easeOutQuint, easeInOutQuint</term>
* <listitem><para>Corresponding to the quintic easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInSine, easeOutSine, easeInOutSine</term>
* <listitem><para>Corresponding to the sine easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInExpo, easeOutExpo, easeInOutExpo</term>
* <listitem><para>Corresponding to the exponential easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInCirc, easeOutCirc, easeInOutCirc</term>
* <listitem><para>Corresponding to the circular easing
* modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInElastic, easeOutElastic, easeInOutElastic</term>
* <listitem><para>Corresponding to the overshooting elastic
* easing modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInBack, easeOutBack, easeInOutBack</term>
* <listitem><para>Corresponding to the overshooting cubic
* easing modes</para></listitem>
* </varlistentry>
* <varlistentry>
* <term>easeInBounce, easeOutBounce, easeInOutBounce</term>
* <listitem><para>Corresponding to the bouncing easing
* modes</para></listitem>
* </varlistentry>
* </variablelist>
* </refsect2>
*
* <example id="example-clutter-animation">
* <title>Tweening using clutter_actor_animate()</title>
* <programlisting>
* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../tests/interactive/test-easing.c">
* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
* </xi:include>
* </programlisting>
* </example>
*
* #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-marshal.h"
#include "clutter-private.h"
#include "clutter-scriptable.h"
#include "clutter-script-private.h"
enum
{
PROP_0,
PROP_OBJECT,
PROP_MODE,
PROP_DURATION,
PROP_LOOP,
PROP_TIMELINE,
PROP_ALPHA,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
enum
{
STARTED,
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;
ClutterAlpha *alpha;
guint timeline_started_id;
guint timeline_completed_id;
guint timeline_frame_id;
};
static guint animation_signals[LAST_SIGNAL] = { 0, };
static GQuark quark_object_animation = 0;
static void clutter_scriptable_init (ClutterScriptableIface *iface);
G_DEFINE_TYPE_WITH_CODE (ClutterAnimation, clutter_animation, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_SCRIPTABLE,
clutter_scriptable_init));
static void
on_actor_destroy (ClutterActor *actor,
ClutterAnimation *animation)
{
ClutterAnimationPrivate *priv = animation->priv;
GObject *obj = G_OBJECT (actor);
if (obj == priv->object)
{
g_object_set_qdata (priv->object, quark_object_animation, NULL);
g_signal_handlers_disconnect_by_func (priv->object,
G_CALLBACK (on_actor_destroy),
animation);
g_object_unref (animation);
}
}
static void
clutter_animation_real_completed (ClutterAnimation *self)
{
ClutterAnimationPrivate *priv = self->priv;
ClutterAnimatable *animatable = NULL;
ClutterAnimation *animation;
ClutterTimeline *timeline;
ClutterTimelineDirection direction;
gpointer key, value;
GHashTableIter iter;
timeline = clutter_animation_get_timeline (self);
direction = clutter_timeline_get_direction (timeline);
if (CLUTTER_IS_ANIMATABLE (priv->object))
animatable = CLUTTER_ANIMATABLE (priv->object);
/* explicitly set the final state of the animation */
CLUTTER_NOTE (ANIMATION, "Set final state on object [%p]", priv->object);
g_hash_table_iter_init (&iter, priv->properties);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const gchar *p_name = key;
ClutterInterval *interval = value;
GValue *p_value;
if (direction == CLUTTER_TIMELINE_FORWARD)
p_value = clutter_interval_peek_final_value (interval);
else
p_value = clutter_interval_peek_initial_value (interval);
if (animatable != NULL)
clutter_animatable_set_final_state (animatable, p_name, p_value);
else
g_object_set_property (priv->object, p_name, p_value);
}
/* at this point, if this animation was created by clutter_actor_animate()
* and friends, the animation will be attached to the object's data; since
* we want to allow developers to use g_signal_connect_after("completed")
* to concatenate a new animation, we need to remove the animation back
* pointer here, and unref() the animation. FIXME - we might want to
* provide a clutter_animation_attach()/clutter_animation_detach() pair
* to let the user reattach an animation
*/
animation = g_object_get_qdata (priv->object, quark_object_animation);
if (animation == self)
{
CLUTTER_NOTE (ANIMATION, "Unsetting animation for actor [%p]",
priv->object);
g_object_set_qdata (priv->object, quark_object_animation, NULL);
g_signal_handlers_disconnect_by_func (priv->object,
G_CALLBACK (on_actor_destroy),
animation);
CLUTTER_NOTE (ANIMATION, "Releasing the reference Animation [%p]",
animation);
g_object_unref (animation);
}
}
static void
clutter_animation_finalize (GObject *gobject)
{
ClutterAnimationPrivate *priv = CLUTTER_ANIMATION (gobject)->priv;
CLUTTER_NOTE (ANIMATION,
"Destroying properties table for Animation [%p]",
gobject);
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;
ClutterTimeline *timeline;
if (priv->alpha != NULL)
timeline = clutter_alpha_get_timeline (priv->alpha);
else
timeline = NULL;
if (timeline != NULL && priv->timeline_started_id != 0)
g_signal_handler_disconnect (timeline, priv->timeline_started_id);
if (timeline != NULL && priv->timeline_completed_id != 0)
g_signal_handler_disconnect (timeline, priv->timeline_completed_id);
if (timeline != NULL && priv->timeline_frame_id != 0)
g_signal_handler_disconnect (timeline, priv->timeline_frame_id);
priv->timeline_started_id = 0;
priv->timeline_completed_id = 0;
priv->timeline_frame_id = 0;
if (priv->alpha != NULL)
{
g_object_unref (priv->alpha);
priv->alpha = NULL;
}
if (priv->object != NULL)
{
g_object_unref (priv->object);
priv->object = 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)
{
ClutterAnimation *animation = CLUTTER_ANIMATION (gobject);
ClutterAnimationPrivate *priv = animation->priv;
switch (prop_id)
{
case PROP_OBJECT:
g_value_set_object (value, priv->object);
break;
case PROP_MODE:
g_value_set_ulong (value, clutter_animation_get_mode (animation));
break;
case PROP_DURATION:
g_value_set_uint (value, clutter_animation_get_duration (animation));
break;
case PROP_LOOP:
g_value_set_boolean (value, clutter_animation_get_loop (animation));
break;
case PROP_TIMELINE:
g_value_set_object (value, clutter_animation_get_timeline (animation));
break;
case PROP_ALPHA:
g_value_set_object (value, clutter_animation_get_alpha (animation));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static gboolean
clutter_animation_parse_custom_node (ClutterScriptable *scriptable,
ClutterScript *script,
GValue *value,
const gchar *name,
JsonNode *node)
{
if (strncmp (name, "mode", 4) == 0)
{
gulong mode;
mode = _clutter_script_resolve_animation_mode (node);
g_value_init (value, G_TYPE_ULONG);
g_value_set_ulong (value, mode);
return TRUE;
}
return FALSE;
}
static void
clutter_scriptable_init (ClutterScriptableIface *iface)
{
iface->parse_custom_node = clutter_animation_parse_custom_node;
}
static void
clutter_animation_class_init (ClutterAnimationClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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:object:
*
* The #GObject to which the animation applies.
*
* Since: 1.0
*/
obj_props[PROP_OBJECT] =
g_param_spec_object ("object",
P_("Object"),
P_("Object to which the animation applies"),
G_TYPE_OBJECT,
CLUTTER_PARAM_READWRITE);
/**
* 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
*/
obj_props[PROP_MODE] =
g_param_spec_ulong ("mode",
P_("Mode"),
P_("The mode of the animation"),
0, G_MAXULONG,
CLUTTER_LINEAR,
CLUTTER_PARAM_READWRITE);
/**
* ClutterAnimation:duration:
*
* The duration of the animation, expressed in milliseconds.
*
* Since: 1.0
*/
obj_props[PROP_DURATION] =
g_param_spec_uint ("duration",
P_("Duration"),
P_("Duration of the animation, in milliseconds"),
0, G_MAXUINT,
0,
CLUTTER_PARAM_READWRITE);
/**
* ClutterAnimation:loop:
*
* Whether the animation should loop.
*
* Since: 1.0
*/
obj_props[PROP_LOOP] =
g_param_spec_boolean ("loop",
P_("Loop"),
P_("Whether the animation should loop"),
FALSE,
CLUTTER_PARAM_READWRITE);
/**
* ClutterAnimation:timeline:
*
* The #ClutterTimeline used by the animation.
*
* Since: 1.0
*/
obj_props[PROP_TIMELINE] =
g_param_spec_object ("timeline",
P_("Timeline"),
P_("The timeline used by the animation"),
CLUTTER_TYPE_TIMELINE,
CLUTTER_PARAM_READWRITE);
/**
* ClutterAnimation:alpha:
*
* The #ClutterAlpha used by the animation.
*
* Since: 1.0
*/
obj_props[PROP_ALPHA] =
g_param_spec_object ("alpha",
P_("Alpha"),
P_("The alpha used by the animation"),
CLUTTER_TYPE_ALPHA,
CLUTTER_PARAM_READWRITE);
g_object_class_install_properties (gobject_class,
PROP_LAST,
obj_props);
/**
* ClutterAnimation::started:
* @animation: the animation that emitted the signal
*
* The ::started signal is emitted once the animation has been
* started
*
* Since: 1.0
*/
animation_signals[STARTED] =
g_signal_new (I_("started"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterAnimationClass, started),
NULL, NULL,
_clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterAnimation::completed:
* @animation: the animation that emitted the signal
*
* The ::completed signal is emitted once the animation has
* been completed.
*
* The @animation instance is guaranteed to be valid for the entire
* duration of the signal emission chain.
*
* 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,
_clutter_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
clutter_animation_init (ClutterAnimation *self)
{
self->priv = CLUTTER_ANIMATION_GET_PRIVATE (self);
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,
const gchar *property_name,
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",
property_name);
return;
}
g_hash_table_insert (priv->properties,
g_strdup (property_name),
g_object_ref_sink (interval));
}
static inline void
clutter_animation_update_property_internal (ClutterAnimation *animation,
const gchar *property_name,
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",
property_name);
return;
}
g_hash_table_replace (priv->properties,
g_strdup (property_name),
g_object_ref_sink (interval));
}
static GParamSpec *
clutter_animation_validate_bind (ClutterAnimation *animation,
const char *property_name,
GType argtype)
{
ClutterAnimationPrivate *priv;
GParamSpec *pspec;
GType pspec_type;
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 NULL;
}
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 NULL;
}
if (CLUTTER_IS_ANIMATABLE (priv->object))
{
ClutterAnimatable *animatable = CLUTTER_ANIMATABLE (priv->object);
pspec = clutter_animatable_find_property (animatable, property_name);
}
else
{
GObjectClass *klass = G_OBJECT_GET_CLASS (priv->object);
pspec = g_object_class_find_property (klass, property_name);
}
if (pspec == NULL)
{
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 NULL;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("Cannot bind property '%s': the property is not writable",
property_name);
return NULL;
}
pspec_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
if (g_value_type_transformable (argtype, pspec_type))
return pspec;
else
{
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 (argtype),
g_type_name (pspec_type));
return NULL;
}
}
/**
* clutter_animation_bind_interval:
* @animation: a #ClutterAnimation
* @property_name: the property to control
* @interval: (transfer full): a #ClutterInterval
*
* Binds @interval to the @property_name of the #GObject
* attached to @animation. The #ClutterAnimation will take
* ownership of the passed #ClutterInterval. For more information
* about animations, see clutter_actor_animate().
*
* If you need to update the interval instance use
* clutter_animation_update_interval() instead.
*
* Return value: (transfer none): The animation itself.
* Since: 1.0
*/
ClutterAnimation *
clutter_animation_bind_interval (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval)
{
GParamSpec *pspec;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
g_return_val_if_fail (CLUTTER_IS_INTERVAL (interval), NULL);
pspec = clutter_animation_validate_bind (animation, property_name,
clutter_interval_get_value_type (interval));
if (pspec == NULL)
return NULL;
clutter_animation_bind_property_internal (animation, property_name,
pspec,
interval);
return animation;
}
/**
* clutter_animation_bind:
* @animation: a #ClutterAnimation
* @property_name: the property to control
* @final: The final value of the property
*
* Adds a single property with name @property_name to the
* animation @animation. For more information about animations,
* see clutter_actor_animate().
*
* This method returns the animation primarily to make chained
* calls convenient in language bindings.
*
* Return value: (transfer none): The animation itself.
*
* Since: 1.0
*/
ClutterAnimation *
clutter_animation_bind (ClutterAnimation *animation,
const gchar *property_name,
const GValue *final)
{
ClutterAnimationPrivate *priv;
GParamSpec *pspec;
ClutterInterval *interval;
GType type;
GValue initial = { 0, };
GValue real_final = { 0, };
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
priv = animation->priv;
type = G_VALUE_TYPE (final);
pspec = clutter_animation_validate_bind (animation, property_name, type);
if (pspec == NULL)
return NULL;
g_value_init (&real_final, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (!g_value_transform (final, &real_final))
{
g_value_unset (&real_final);
g_warning ("Unable to transform the value of type '%s' to a value "
"of '%s' compatible with the property '%s'of the object "
"of type '%s'",
g_type_name (type),
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
property_name,
G_OBJECT_TYPE_NAME (priv->object));
return NULL;
}
g_value_init (&initial, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (CLUTTER_IS_ANIMATABLE (priv->object))
clutter_animatable_get_initial_state (CLUTTER_ANIMATABLE (priv->object),
property_name,
&initial);
else
g_object_get_property (priv->object, property_name, &initial);
interval = clutter_interval_new_with_values (G_PARAM_SPEC_VALUE_TYPE (pspec),
&initial,
&real_final);
g_value_unset (&initial);
g_value_unset (&real_final);
clutter_animation_bind_property_internal (animation, property_name,
pspec,
interval);
return animation;
}
/**
* 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_interval:
* @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_interval (ClutterAnimation *animation,
const gchar *property_name,
ClutterInterval *interval)
{
ClutterAnimationPrivate *priv;
GParamSpec *pspec;
GType pspec_type, int_type;
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 update property '%s': the animation has "
"no bound property with that name",
property_name);
return;
}
if (CLUTTER_IS_ANIMATABLE (priv->object))
{
ClutterAnimatable *animatable = CLUTTER_ANIMATABLE (priv->object);
pspec = clutter_animatable_find_property (animatable, property_name);
}
else
{
GObjectClass *klass = G_OBJECT_GET_CLASS (priv->object);
pspec = g_object_class_find_property (klass, property_name);
}
if (pspec == NULL)
{
g_warning ("Cannot update property '%s': objects of type '%s' have "
"no such property",
property_name,
g_type_name (G_OBJECT_TYPE (priv->object)));
return;
}
pspec_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
int_type = clutter_interval_get_value_type (interval);
if (!g_value_type_compatible (int_type, pspec_type) ||
!g_value_type_transformable (int_type, pspec_type))
{
g_warning ("Cannot update property '%s': the interval value of "
"type '%s' is not compatible with the property value "
"of type '%s'",
property_name,
g_type_name (int_type),
g_type_name (pspec_type));
return;
}
clutter_animation_update_property_internal (animation, property_name,
pspec,
interval);
}
/**
* clutter_animation_update:
* @animation: a #ClutterAnimation
* @property_name: name of the property
* @final: The final value of the property
*
* Updates the @final value of the interval for @property_name
*
* Return value: (transfer none): The animation itself.
*
* Since: 1.0
*/
ClutterAnimation *
clutter_animation_update (ClutterAnimation *animation,
const gchar *property_name,
const GValue *final)
{
ClutterInterval *interval;
GType int_type;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
g_return_val_if_fail (final != NULL, NULL);
g_return_val_if_fail (G_VALUE_TYPE (final) != G_TYPE_INVALID, NULL);
interval = clutter_animation_get_interval (animation, property_name);
if (interval == NULL)
{
g_warning ("Cannot update property '%s': the animation has "
"no bound property with that name",
property_name);
return NULL;
}
int_type = clutter_interval_get_value_type (interval);
if (!g_value_type_compatible (G_VALUE_TYPE (final), int_type) ||
!g_value_type_transformable (G_VALUE_TYPE (final), int_type))
{
g_warning ("Cannot update property '%s': the interval value of "
"type '%s' is not compatible with the property value "
"of type '%s'",
property_name,
g_type_name (int_type),
g_type_name (G_VALUE_TYPE (final)));
return NULL;
}
clutter_interval_set_final_value (interval, final);
return animation;
}
/**
* 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_started (ClutterTimeline *timeline,
ClutterAnimation *animation)
{
g_signal_emit (animation, animation_signals[STARTED], 0);
}
static void
on_timeline_completed (ClutterTimeline *timeline,
ClutterAnimation *animation)
{
CLUTTER_NOTE (ANIMATION, "Timeline [%p] complete", timeline);
if (!clutter_animation_get_loop (animation))
g_signal_emit (animation, animation_signals[COMPLETED], 0);
}
static void
on_timeline_frame (ClutterTimeline *timeline,
gint elapsed,
ClutterAnimation *animation)
{
ClutterAnimationPrivate *priv;
GList *properties, *p;
gdouble alpha_value;
gboolean is_animatable = FALSE;
ClutterAnimatable *animatable = NULL;
/* make sure the animation survives the notification */
g_object_ref (animation);
priv = animation->priv;
alpha_value = clutter_alpha_get_alpha (priv->alpha);
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, };
gboolean apply;
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)
{
apply = clutter_animatable_interpolate_value (animatable, p_name,
interval,
alpha_value,
&value);
}
else
{
apply = clutter_interval_compute_value (interval,
alpha_value,
&value);
}
if (apply)
{
if (is_animatable)
clutter_animatable_set_final_state (animatable, p_name, &value);
else
g_object_set_property (priv->object, p_name, &value);
}
g_value_unset (&value);
}
g_list_free (properties);
g_object_thaw_notify (priv->object);
g_object_unref (animation);
}
static ClutterAlpha *
clutter_animation_get_alpha_internal (ClutterAnimation *animation)
{
ClutterAnimationPrivate *priv = animation->priv;
if (priv->alpha == NULL)
{
ClutterAlpha *alpha;
alpha = clutter_alpha_new ();
clutter_alpha_set_mode (alpha, CLUTTER_LINEAR);
priv->alpha = g_object_ref_sink (alpha);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_ALPHA]);
}
return priv->alpha;
}
static ClutterTimeline *
clutter_animation_get_timeline_internal (ClutterAnimation *animation)
{
ClutterAnimationPrivate *priv = animation->priv;
ClutterTimeline *timeline;
ClutterAlpha *alpha;
alpha = clutter_animation_get_alpha_internal (animation);
timeline = clutter_alpha_get_timeline (alpha);
if (timeline != NULL)
return timeline;
timeline = g_object_new (CLUTTER_TYPE_TIMELINE, NULL);
priv->timeline_started_id =
g_signal_connect (timeline, "started",
G_CALLBACK (on_timeline_started),
animation);
priv->timeline_completed_id =
g_signal_connect (timeline, "completed",
G_CALLBACK (on_timeline_completed),
animation);
priv->timeline_frame_id =
g_signal_connect (timeline, "new-frame",
G_CALLBACK (on_timeline_frame),
animation);
clutter_alpha_set_timeline (alpha, timeline);
/* the alpha owns the timeline now */
g_object_unref (timeline);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_TIMELINE]);
return timeline;
}
/**
* clutter_animation_new:
*
* Creates a new #ClutterAnimation instance. You should set the
* #GObject to be animated using clutter_animation_set_object(),
* set the duration with clutter_animation_set_duration() and the
* easing mode using clutter_animation_set_mode().
*
* Use clutter_animation_bind() or clutter_animation_bind_interval()
* to define the properties to be animated. The interval and the
* animated properties can be updated at runtime.
*
* The clutter_actor_animate() and relative family of functions provide
* an easy way to animate a #ClutterActor and automatically manage the
* lifetime of a #ClutterAnimation instance, so you should consider using
* those functions instead of manually creating an animation.
*
* Return value: the newly created #ClutterAnimation. Use g_object_unref()
* to release the associated resources
*
* Since: 1.0
*/
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 (object == NULL || G_IS_OBJECT (object));
priv = animation->priv;
if (priv->object != NULL)
{
g_object_set_qdata (priv->object, quark_object_animation, NULL);
g_object_unref (priv->object);
priv->object = NULL;
}
if (object != NULL)
priv->object = g_object_ref (object);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_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;
}
/**
* 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().
*
* This function will also set #ClutterAnimation:alpha if needed.
*
* Since: 1.0
*/
void
clutter_animation_set_mode (ClutterAnimation *animation,
gulong mode)
{
ClutterAlpha *alpha;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_object_freeze_notify (G_OBJECT (animation));
alpha = clutter_animation_get_alpha_internal (animation);
g_assert (CLUTTER_IS_ALPHA (alpha));
clutter_alpha_set_mode (alpha, mode);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_MODE]);
g_object_thaw_notify (G_OBJECT (animation));
}
/**
* 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)
{
ClutterAlpha *alpha;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), CLUTTER_LINEAR);
alpha = clutter_animation_get_alpha_internal (animation);
return clutter_alpha_get_mode (alpha);
}
/**
* clutter_animation_set_duration:
* @animation: a #ClutterAnimation
* @msecs: the duration in milliseconds
*
* Sets the duration of @animation in milliseconds.
*
* This function will set #ClutterAnimation:alpha and
* #ClutterAnimation:timeline if needed.
*
* Since: 1.0
*/
void
clutter_animation_set_duration (ClutterAnimation *animation,
guint msecs)
{
ClutterTimeline *timeline;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_object_freeze_notify (G_OBJECT (animation));
timeline = clutter_animation_get_timeline_internal (animation);
g_assert (CLUTTER_IS_TIMELINE (timeline));
clutter_timeline_set_duration (timeline, msecs);
clutter_timeline_rewind (timeline);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_DURATION]);
g_object_thaw_notify (G_OBJECT (animation));
}
/**
* 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.
*
* This function will set #ClutterAnimation:alpha and
* #ClutterAnimation:timeline if needed.
*
* Since: 1.0
*/
void
clutter_animation_set_loop (ClutterAnimation *animation,
gboolean loop)
{
ClutterTimeline *timeline;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_object_freeze_notify (G_OBJECT (animation));
timeline = clutter_animation_get_timeline_internal (animation);
clutter_timeline_set_loop (timeline, loop);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_LOOP]);
g_object_thaw_notify (G_OBJECT (animation));
}
/**
* 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)
{
ClutterTimeline *timeline;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), FALSE);
timeline = clutter_animation_get_timeline_internal (animation);
return clutter_timeline_get_loop (timeline);
}
/**
* 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)
{
ClutterTimeline *timeline;
g_return_val_if_fail (CLUTTER_IS_ANIMATION (animation), 0);
timeline = clutter_animation_get_timeline_internal (animation);
return clutter_timeline_get_duration (timeline);
}
/**
* clutter_animation_set_timeline:
* @animation: a #ClutterAnimation
* @timeline: a #ClutterTimeline, or %NULL to unset the
* current #ClutterTimeline
*
* Sets the #ClutterTimeline used by @animation.
*
* Since: 1.0
*/
void
clutter_animation_set_timeline (ClutterAnimation *animation,
ClutterTimeline *timeline)
{
ClutterAnimationPrivate *priv;
ClutterTimeline *cur_timeline;
ClutterAlpha *alpha;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (timeline == NULL || CLUTTER_IS_TIMELINE (timeline));
priv = animation->priv;
if (priv->alpha != NULL)
cur_timeline = clutter_alpha_get_timeline (priv->alpha);
else
cur_timeline = NULL;
if (cur_timeline == timeline)
return;
g_object_freeze_notify (G_OBJECT (animation));
if (cur_timeline != NULL && priv->timeline_started_id != 0)
g_signal_handler_disconnect (cur_timeline, priv->timeline_started_id);
if (cur_timeline != NULL && priv->timeline_completed_id != 0)
g_signal_handler_disconnect (cur_timeline, priv->timeline_completed_id);
if (cur_timeline != NULL && priv->timeline_frame_id != 0)
g_signal_handler_disconnect (cur_timeline, priv->timeline_frame_id);
priv->timeline_started_id = 0;
priv->timeline_completed_id = 0;
priv->timeline_frame_id = 0;
alpha = clutter_animation_get_alpha_internal (animation);
clutter_alpha_set_timeline (alpha, timeline);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_TIMELINE]);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_DURATION]);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_LOOP]);
if (timeline)
{
priv->timeline_started_id =
g_signal_connect (timeline, "started",
G_CALLBACK (on_timeline_started),
animation);
priv->timeline_completed_id =
g_signal_connect (timeline, "completed",
G_CALLBACK (on_timeline_completed),
animation);
priv->timeline_frame_id =
g_signal_connect (timeline, "new-frame",
G_CALLBACK (on_timeline_frame),
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 clutter_animation_get_timeline_internal (animation);
}
/**
* clutter_animation_set_alpha:
* @animation: a #ClutterAnimation
* @alpha: a #ClutterAlpha, or %NULL to unset the current #ClutterAlpha
*
* Sets @alpha as the #ClutterAlpha used by @animation.
*
* If @alpha is not %NULL, the #ClutterAnimation will take ownership
* of the #ClutterAlpha instance.
*
* Since: 1.0
*/
void
clutter_animation_set_alpha (ClutterAnimation *animation,
ClutterAlpha *alpha)
{
ClutterAnimationPrivate *priv;
ClutterTimeline *timeline;
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_return_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha));
priv = animation->priv;
if (priv->alpha == alpha)
return;
g_object_freeze_notify (G_OBJECT (animation));
if (priv->alpha != NULL)
timeline = clutter_alpha_get_timeline (priv->alpha);
else
timeline = NULL;
/* disconnect the old timeline first */
if (timeline != NULL && priv->timeline_started_id != 0)
{
g_signal_handler_disconnect (timeline, priv->timeline_started_id);
priv->timeline_started_id = 0;
}
if (timeline != NULL && priv->timeline_completed_id != 0)
{
g_signal_handler_disconnect (timeline, priv->timeline_completed_id);
priv->timeline_completed_id = 0;
}
/* then we need to disconnect the signal handler from the old alpha */
if (timeline != NULL && priv->timeline_frame_id != 0)
{
g_signal_handler_disconnect (timeline, priv->timeline_frame_id);
priv->timeline_frame_id = 0;
}
if (priv->alpha != NULL)
{
/* this will take care of any reference we hold on the timeline */
g_object_unref (priv->alpha);
priv->alpha = NULL;
}
if (alpha == NULL)
goto out;
priv->alpha = g_object_ref_sink (alpha);
/* if the alpha has a timeline then we use it, otherwise we create one */
timeline = clutter_alpha_get_timeline (priv->alpha);
if (timeline != NULL)
{
priv->timeline_started_id =
g_signal_connect (timeline, "started",
G_CALLBACK (on_timeline_started),
animation);
priv->timeline_completed_id =
g_signal_connect (timeline, "completed",
G_CALLBACK (on_timeline_completed),
animation);
priv->timeline_frame_id =
g_signal_connect (timeline, "new-frame",
G_CALLBACK (on_timeline_frame),
animation);
}
else
{
/* FIXME - add a create_timeline_internal() because this does
* not look very good
*/
(void) clutter_animation_get_timeline_internal (animation);
}
out:
/* emit all relevant notifications */
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_MODE]);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_DURATION]);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_LOOP]);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_ALPHA]);
g_object_notify_by_pspec (G_OBJECT (animation), obj_props[PROP_TIMELINE]);
g_object_thaw_notify (G_OBJECT (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 clutter_animation_get_alpha_internal (animation);
}
/**
* clutter_animation_completed:
* @animation: a #ClutterAnimation
*
* Emits the ::completed signal on @animation
*
* When using this function with a #ClutterAnimation created
* by the clutter_actor_animate() family of functions, @animation
* will be unreferenced and it will not be valid anymore,
* unless g_object_ref() was called before calling this function
* or unless a reference was taken inside a handler for the
* #ClutterAnimation::completed signal
*
* Since: 1.0
*/
void
clutter_animation_completed (ClutterAnimation *animation)
{
g_return_if_fail (CLUTTER_IS_ANIMATION (animation));
g_signal_emit (animation, animation_signals[COMPLETED], 0);
}
/*
* starts the timeline
*/
static void
clutter_animation_start (ClutterAnimation *animation)
{
ClutterTimeline *timeline;
timeline = clutter_animation_get_timeline_internal (animation);
if (G_LIKELY (timeline != NULL))
clutter_timeline_start (timeline);
else
{
/* sanity check */
g_warning (G_STRLOC ": no timeline found, unable to start the animation");
}
}
static void
clutter_animation_setup_property (ClutterAnimation *animation,
const gchar *property_name,
const GValue *value,
GParamSpec *pspec,
gboolean is_fixed)
{
ClutterAnimationPrivate *priv = animation->priv;
GValue real_value = { 0, };
if (pspec->flags & G_PARAM_CONSTRUCT_ONLY)
{
g_warning ("Cannot bind property '%s': the property is "
"construct-only",
property_name);
return;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("Cannot bind property '%s': the property is "
"not writable",
property_name);
return;
}
/* initialize the real value that will be used to store the
* final state of the animation
*/
g_value_init (&real_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
/* if it's not the same type of the GParamSpec value, try to
* convert it using the GValue transformation API, otherwise
* just copy it
*/
if (!g_type_is_a (G_VALUE_TYPE (value), G_VALUE_TYPE (&real_value)))
{
/* are these two types compatible (can be directly copied)? */
if (g_value_type_compatible (G_VALUE_TYPE (value),
G_VALUE_TYPE (&real_value)))
{
g_value_copy (value, &real_value);
goto done;
}
/* are these two type transformable? */
if (g_value_type_transformable (G_VALUE_TYPE (value),
G_VALUE_TYPE (&real_value)))
{
if (g_value_transform (value, &real_value))
goto done;
}
/* if not compatible and not transformable then we can't do much */
g_warning ("%s: Unable to convert from %s to %s for "
"the property '%s' of object %s",
G_STRLOC,
g_type_name (G_VALUE_TYPE (value)),
g_type_name (G_VALUE_TYPE (&real_value)),
property_name,
G_OBJECT_TYPE_NAME (priv->object));
g_value_unset (&real_value);
return;
}
else
g_value_copy (value, &real_value);
done:
/* 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 cur_value = { 0, };
g_value_init (&cur_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (CLUTTER_IS_ANIMATABLE (priv->object))
clutter_animatable_get_initial_state (CLUTTER_ANIMATABLE (priv->object),
property_name,
&cur_value);
else
g_object_get_property (priv->object, property_name, &cur_value);
interval =
clutter_interval_new_with_values (G_PARAM_SPEC_VALUE_TYPE (pspec),
&cur_value,
&real_value);
if (!clutter_animation_has_property (animation, property_name))
clutter_animation_bind_property_internal (animation, property_name,
pspec,
interval);
else
clutter_animation_update_property_internal (animation, property_name,
pspec,
interval);
g_value_unset (&cur_value);
}
else
{
if (CLUTTER_IS_ANIMATABLE (priv->object))
clutter_animatable_set_final_state (CLUTTER_ANIMATABLE (priv->object),
property_name,
&real_value);
else
g_object_set_property (priv->object, property_name, &real_value);
}
g_value_unset (&real_value);
}
static void
clutter_animation_setupv (ClutterAnimation *animation,
gint n_properties,
const gchar * const properties[],
const GValue *values)
{
ClutterAnimationPrivate *priv = animation->priv;
ClutterAnimatable *animatable = NULL;
GObjectClass *klass = NULL;
gint i;
if (CLUTTER_IS_ANIMATABLE (priv->object))
animatable = CLUTTER_ANIMATABLE (priv->object);
else
klass = G_OBJECT_GET_CLASS (priv->object);
for (i = 0; i < n_properties; i++)
{
const gchar *property_name = properties[i];
GParamSpec *pspec;
gboolean is_fixed = FALSE;
if (g_str_has_prefix (property_name, "fixed::"))
{
property_name += 7; /* strlen("fixed::") */
is_fixed = TRUE;
}
if (animatable != NULL)
pspec = clutter_animatable_find_property (animatable, property_name);
else
pspec = g_object_class_find_property (klass, property_name);
if (pspec == NULL)
{
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;
}
clutter_animation_setup_property (animation, property_name,
&values[i],
pspec,
is_fixed);
}
}
static const struct
{
const gchar *name;
GConnectFlags flags;
} signal_prefixes[] =
{
{ "::", 0 },
{ "-swapped::", G_CONNECT_SWAPPED },
{ "-after::", G_CONNECT_AFTER },
{ "-swapped-after::", G_CONNECT_SWAPPED | G_CONNECT_AFTER }
};
static gboolean
clutter_animation_has_signal_prefix (const gchar *property_name,
GConnectFlags *flags,
int *offset)
{
int i;
if (!g_str_has_prefix (property_name, "signal"))
return FALSE;
for (i = 0; i < G_N_ELEMENTS (signal_prefixes); i++)
if (g_str_has_prefix (property_name + 6, signal_prefixes[i].name))
{
*offset = strlen (signal_prefixes[i].name) + 6;
*flags = signal_prefixes[i].flags;
return TRUE;
}
return FALSE;
}
static void
clutter_animation_setup_valist (ClutterAnimation *animation,
const gchar *first_property_name,
va_list var_args)
{
ClutterAnimationPrivate *priv = animation->priv;
ClutterAnimatable *animatable = NULL;
GObjectClass *klass = NULL;
const gchar *property_name;
if (CLUTTER_IS_ANIMATABLE (priv->object))
animatable = CLUTTER_ANIMATABLE (priv->object);
else
klass = G_OBJECT_GET_CLASS (priv->object);
property_name = first_property_name;
while (property_name != NULL)
{
GParamSpec *pspec;
GValue final = { 0, };
gchar *error = NULL;
gboolean is_fixed = FALSE;
GConnectFlags flags;
int offset;
if (clutter_animation_has_signal_prefix (property_name,
&flags,
&offset))
{
const gchar *signal_name = property_name + offset;
GCallback callback = va_arg (var_args, GCallback);
gpointer userdata = va_arg (var_args, gpointer);
g_signal_connect_data (animation, signal_name,
callback, userdata,
NULL, flags);
}
else
{
if (g_str_has_prefix (property_name, "fixed::"))
{
property_name += 7; /* strlen("fixed::") */
is_fixed = TRUE;
}
if (animatable != NULL)
pspec = clutter_animatable_find_property (animatable,
property_name);
else
pspec = g_object_class_find_property (klass, property_name);
if (pspec == NULL)
{
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;
}
G_VALUE_COLLECT_INIT (&final, G_PARAM_SPEC_VALUE_TYPE (pspec),
var_args, 0,
&error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
clutter_animation_setup_property (animation, property_name,
&final,
pspec,
is_fixed);
}
property_name = va_arg (var_args, gchar*);
}
}
static ClutterAnimation *
animation_create_for_actor (ClutterActor *actor)
{
ClutterAnimation *animation;
GObject *object = G_OBJECT (actor);
animation = g_object_get_qdata (object, quark_object_animation);
if (animation == NULL)
{
animation = clutter_animation_new ();
clutter_animation_set_object (animation, object);
g_object_set_qdata (object, quark_object_animation, animation);
/* use the ::destroy signal to get a notification
* that the actor went away mid-animation
*/
g_signal_connect (object, "destroy",
G_CALLBACK (on_actor_destroy),
animation);
CLUTTER_NOTE (ANIMATION,
"Created new Animation [%p] for actor [%p]",
animation,
actor);
}
else
{
CLUTTER_NOTE (ANIMATION,
"Reusing Animation [%p] for actor [%p]",
animation,
actor);
}
return animation;
}
/**
* clutter_actor_animate_with_alpha:
* @actor: a #ClutterActor
* @alpha: a #ClutterAlpha
* @first_property_name: the name of a property
* @...: 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 (timeline == NULL)
{
g_warning ("The passed ClutterAlpha does not have an "
"associated ClutterTimeline.");
return NULL;
}
animation = animation_create_for_actor (actor);
clutter_animation_set_alpha (animation, alpha);
va_start (args, first_property_name);
clutter_animation_setup_valist (animation, first_property_name, args);
va_end (args);
clutter_animation_start (animation);
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
* @...: 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 = animation_create_for_actor (actor);
clutter_animation_set_mode (animation, mode);
clutter_animation_set_timeline (animation, timeline);
va_start (args, first_property_name);
clutter_animation_setup_valist (animation, first_property_name, args);
va_end (args);
clutter_animation_start (animation);
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
* @...: 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", 100.0,
* "height", 100.0,
* 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_SINE, 100,
* "rotation-angle-z", 360.0,
* "fixed::rotation-center-z", &amp;center,
* NULL);
* ]|
*
* Will animate the "rotation-angle-z" property between the current value
* and 360 degrees, and set the "rotation-center-z" property to the fixed
* value of the #ClutterVertex "center".
*
* 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.
*
* If a name argument starts with "signal::", "signal-after::",
* "signal-swapped::" or "signal-swapped-after::" the two following arguments
* are used as callback function and data for a signal handler installed on
* the #ClutterAnimation object for the specified signal name, for instance:
*
* |[
*
* static void
* on_animation_completed (ClutterAnimation *animation,
* ClutterActor *actor)
* {
* clutter_actor_hide (actor);
* }
*
* clutter_actor_animate (actor, CLUTTER_EASE_IN_CUBIC, 100,
* "opacity", 0,
* "signal::completed", on_animation_completed, actor,
* NULL);
* ]|
*
* or, to automatically destroy an actor at the end of the animation:
*
* |[
* clutter_actor_animate (actor, CLUTTER_EASE_IN_CUBIC, 100,
* "opacity", 0,
* "signal-swapped-after::completed",
* clutter_actor_destroy,
* actor,
* NULL);
* ]|
*
* The "signal::" modifier is the equivalent of using g_signal_connect();
* the "signal-after::" modifier is the equivalent of using
* g_signal_connect_after() or g_signal_connect_data() with the
* %G_CONNECT_AFTER; the "signal-swapped::" modifier is the equivalent
* of using g_signal_connect_swapped() or g_signal_connect_data() with the
* %G_CONNECT_SWAPPED flah; finally, the "signal-swapped-after::" modifier
* is the equivalent of using g_signal_connect_data() with both the
* %G_CONNECT_AFTER and %G_CONNECT_SWAPPED flags. The clutter_actor_animate()
* function will not keep track of multiple connections to the same signal,
* so it is your responsability to avoid them when calling
* clutter_actor_animate() multiple times on the same actor.
*
* 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, CLUTTER_LINEAR, 250,
* "width", 100.0,
* "height", 100.0,
* NULL);
* clutter_actor_animate (actor, CLUTTER_EASE_IN_CUBIC, 500,
* "x", 100.0,
* "y", 100.0,
* "width", 200.0,
* NULL);
* ]|
*
* is the equivalent of:
*
* |[
* clutter_actor_animate (actor, CLUTTER_EASE_IN_CUBIC, 500,
* "x", 100.0,
* "y", 100.0,
* "width", 200.0,
* "height", 100.0,
* NULL);
* ]|
*
* <note>Unless the animation is looping, the #ClutterAnimation created by
* clutter_actor_animate() will become invalid as soon as it is
* complete.</note>
*
* Since the created #ClutterAnimation instance attached to @actor
* is guaranteed to be valid throughout the #ClutterAnimation::completed
* signal emission chain, you will not be able to create a new animation
* using clutter_actor_animate() on the same @actor from within the
* #ClutterAnimation::completed signal handler unless you use
* g_signal_connect_after() to connect the callback function, for instance:
*
* |[
* static void
* on_animation_completed (ClutterAnimation *animation,
* ClutterActor *actor)
* {
* clutter_actor_animate (actor, CLUTTER_EASE_OUT_CUBIC, 250,
* "x", 500.0,
* "y", 500.0,
* NULL);
* }
*
* ...
* animation = clutter_actor_animate (actor, CLUTTER_EASE_IN_CUBIC, 250,
* "x", 100.0,
* "y", 100.0,
* NULL);
* g_signal_connect (animation, "completed",
* G_CALLBACK (on_animation_completed),
* 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 (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 = animation_create_for_actor (actor);
clutter_animation_set_mode (animation, mode);
clutter_animation_set_duration (animation, duration);
va_start (args, first_property_name);
clutter_animation_setup_valist (animation, first_property_name, args);
va_end (args);
clutter_animation_start (animation);
return animation;
}
/**
* clutter_actor_animatev:
* @actor: a #ClutterActor
* @mode: an animation mode logical id
* @duration: duration of the animation, in milliseconds
* @n_properties: number of property names and values
* @properties: (array length=n_properties) (element-type utf8): a vector
* containing the property names to set
* @values: (array length=n_properties): a vector containing the
* property values to set
*
* 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.
*
* This is the vector-based variant of clutter_actor_animate(), useful
* for language bindings.
*
* <warning>Unlike clutter_actor_animate(), this function will not
* allow you to specify "signal::" names and callbacks.</warning>
*
* 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_animatev (ClutterActor *actor,
gulong mode,
guint duration,
gint n_properties,
const gchar * const properties[],
const GValue *values)
{
ClutterAnimation *animation;
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 (properties != NULL, NULL);
g_return_val_if_fail (values != NULL, NULL);
animation = animation_create_for_actor (actor);
clutter_animation_set_mode (animation, mode);
clutter_animation_set_duration (animation, duration);
clutter_animation_setupv (animation, n_properties, properties, values);
clutter_animation_start (animation);
return animation;
}
/**
* clutter_actor_animate_with_timelinev:
* @actor: a #ClutterActor
* @mode: an animation mode logical id
* @timeline: a #ClutterTimeline
* @n_properties: number of property names and values
* @properties: (array length=n_properties) (element-type utf8): a vector
* containing the property names to set
* @values: (array length=n_properties): a vector containing the
* property values to set
*
* 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.
*
* This is the vector-based variant of clutter_actor_animate_with_timeline(),
* useful for language bindings.
*
* <warning>Unlike clutter_actor_animate_with_timeline(), this function
* will not allow you to specify "signal::" names and callbacks.</warning>
*
* 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_timelinev (ClutterActor *actor,
gulong mode,
ClutterTimeline *timeline,
gint n_properties,
const gchar * const properties[],
const GValue *values)
{
ClutterAnimation *animation;
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 (properties != NULL, NULL);
g_return_val_if_fail (values != NULL, NULL);
animation = animation_create_for_actor (actor);
clutter_animation_set_mode (animation, mode);
clutter_animation_set_timeline (animation, timeline);
clutter_animation_setupv (animation, n_properties, properties, values);
clutter_animation_start (animation);
return animation;
}
/**
* clutter_actor_animate_with_alphav:
* @actor: a #ClutterActor
* @alpha: a #ClutterAlpha
* @n_properties: number of property names and values
* @properties: (array length=n_properties) (element-type utf8): a vector
* containing the property names to set
* @values: (array length=n_properties): a vector containing the
* property values to set
*
* 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.
*
* This is the vector-based variant of clutter_actor_animate_with_alpha(),
* useful for language bindings.
*
* <warning>Unlike clutter_actor_animate_with_alpha(), this function will
* not allow you to specify "signal::" names and callbacks.</warning>
*
* 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_alphav (ClutterActor *actor,
ClutterAlpha *alpha,
gint n_properties,
const gchar * const properties[],
const GValue *values)
{
ClutterAnimation *animation;
ClutterTimeline *timeline;
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 (properties != NULL, NULL);
g_return_val_if_fail (values != NULL, NULL);
timeline = clutter_alpha_get_timeline (alpha);
if (timeline == NULL)
{
g_warning ("The passed ClutterAlpha does not have an "
"associated ClutterTimeline.");
return NULL;
}
animation = animation_create_for_actor (actor);
clutter_animation_set_alpha (animation, alpha);
clutter_animation_setupv (animation, n_properties, properties, values);
clutter_animation_start (animation);
return animation;
}
/**
* clutter_actor_get_animation:
* @actor: a #ClutterActor
*
* Retrieves the #ClutterAnimation used by @actor, if clutter_actor_animate()
* has been called on @actor.
*
* Return value: (transfer none): a #ClutterAnimation, or %NULL
*
* Since: 1.0
*/
ClutterAnimation *
clutter_actor_get_animation (ClutterActor *actor)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL);
return g_object_get_qdata (G_OBJECT (actor), quark_object_animation);
}
/**
* clutter_actor_detach_animation:
* @actor: a #ClutterActor
*
* Detaches the #ClutterAnimation used by @actor, if clutter_actor_animate()
* has been called on @actor.
*
* Once the animation has been detached, it loses a reference. If it was
* the only reference then the #ClutterAnimation becomes invalid.
*
* The #ClutterAnimation::completed signal will not be emitted.
*
* Since: 1.4
*/
void
clutter_actor_detach_animation (ClutterActor *actor)
{
ClutterAnimation *animation;
ClutterAnimationPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
animation = g_object_get_qdata (G_OBJECT (actor), quark_object_animation);
if (animation == NULL)
return;
priv = animation->priv;
g_assert (priv->object == G_OBJECT (actor));
/* we can't call get_timeline_internal() here because it would be
* pointless to create a timeline on an animation we want to detach
*/
if (priv->alpha != NULL)
{
ClutterTimeline *timeline;
timeline = clutter_alpha_get_timeline (priv->alpha);
if (timeline != NULL)
clutter_timeline_stop (timeline);
}
/* disconnect the ::destroy handler added by animation_create_for_actor() */
g_signal_handlers_disconnect_by_func (actor,
G_CALLBACK (on_actor_destroy),
animation);
clutter_animation_set_object (animation, NULL);
/* drop the reference on the animation */
g_object_unref (animation);
}
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