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The ClutterAnimation class, along with the ClutterActor wrappers
clutter_actor_animate(), clutter_actor_animate_with_timeline() and
clutter_actor_animate_with_alpha(), has been deprecated in Clutter 1.12,
and should not be used in newly written code.
The direct replacement for a ClutterAnimation is the ClutterPropertyTransition class, which allows the transition of a single GObject property from an initial value to a final value over a user-defined time using a user-defined easing curve.
The ClutterPropertyTransition class inherits from ClutterTransition, which allows setting the transition interval, as well as the animatable instance to be transitioned; and from ClutterTimeline, which allows setting the duration and easing curve of the transition.
For instance, the following ClutterAnimation set up:
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ClutterAnimation *animation = clutter_animation_new (); clutter_animation_set_mode (animation, CLUTTER_EASE_OUT_CUBIC); clutter_animation_set_duration (animation, 2500); /* object_to_animate is set elsewhere */ clutter_animation_set_object (animation, object_to_animate); ClutterInterval *interval = clutter_interval_new (G_TYPE_FLOAT, 0.0, 100.0); /* property_name is set elsewhere */ clutter_animation_bind_interval (animation, property_name, interval); ClutterTimeline *timeline = clutter_animation_get_timeline (animation); clutter_timeline_start (timeline); |
Can be replaced by ClutterPropertyTransition:
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ClutterTransition *transition = clutter_property_transition_new (property_name); clutter_timeline_set_progress_mode (CLUTTER_TIMELINE (transition), CLUTTER_EASE_OUT_CUBIC); clutter_timeline_set_duration (CLUTTER_TIMELINE (transition), 2000); clutter_transition_set_animatable (transition, object_to_animate); clutter_transition_set_from (transition, G_TYPE_FLOAT, 0.0); clutter_transition_set_to (transition, G_TYPE_FLOAT, 100.0); clutter_timeline_start (CLUTTER_TIMELINE (transition)); |
It is important to note that only ClutterAnimatable implementations can be used directly with ClutterTransition.
A ClutterPropertyTransition can only animate a single property; if more than one property transition is required, you can use the ClutterTransitionGroup class to group the transitions together.
clutter_actor_animate()
ClutterActor animatable properties can use implicit transitions
through their setter functions. The duration and easing curve of the
animation is controlled by clutter_actor_set_easing_duration() and by
clutter_actor_set_easing_mode(), respectively; for instance, the
equivalent of the following clutter_actor_animate() call:
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clutter_actor_animate (actor, CLUTTER_EASE_OUT_BOUNCE, 500, "x", new_x_position, "y", new_y_position, "opacity", 255, NULL); |
Can be replaced by the following:
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clutter_actor_set_easing_mode (actor, CLUTTER_EASE_OUT_BOUNCE); clutter_actor_set_easing_duration (actor, 500); clutter_actor_set_position (actor, new_x_position, new_y_position); clutter_actor_set_opacity (actor, 255); |
The default easing duration for the 1.0 API series is set to 0, which means no transition at all.
It is possible to set the easing state of a ClutterActor to its
default values by using clutter_actor_save_easing_state(), and return
to the previous values by calling clutter_actor_restore_easing_state()
instead. The easing state affects all the animatable properties that
are modified after changing it; so, for instance:
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clutter_actor_save_easing_state (actor); clutter_actor_set_easing_duration (actor, 500); clutter_actor_set_opacity (actor, 255); clutter_actor_save_easing_state (actor); clutter_actor_set_easing_delay (actor, 500); clutter_actor_set_easing_duration (actor, 500); clutter_actor_set_size (actor, width, height); clutter_actor_restore_easing_state (actor); clutter_actor_restore_easing_state (actor); |
The animation above will implicitly transition the opacity from its current value to 255 in 500 milliseconds using the default easing curve; at the same time, the size of the actor will be transitioned in 500 milliseconds after a delay of 500 milliseconds to the new size stored in the variables width and height.