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<title>Migrating from ClutterBehaviour: Clutter Reference Manual</title>
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<div class="chapter">
<div class="titlepage"><div>
<div><h2 class="title">
<a name="migrating-ClutterBehaviour"></a>Migrating from ClutterBehaviour</h2></div>
<div><div class="author">
<h3 class="author">
<span class="firstname">Emmanuele</span> <span class="surname">Bassi</span>
</h3>
<div class="affiliation"><div class="address"><p><br>
<code class="email"><<a class="email" href="mailto:ebassilinux.intel.com">ebassi<em class="parameter"><code>linux.intel.com</code></em></a>></code><br>
</p></div></div>
</div></div>
</div></div>
<p>The <a class="link" href="ClutterBehaviour.html" title="ClutterBehaviour"><span class="type">ClutterBehaviour</span></a> class and its sub-classes have been deprecated
since Clutter 1.6. The animation framework provided by <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a>,
<a class="link" href="ClutterAnimator.html" title="ClutterAnimator"><span class="type">ClutterAnimator</span></a> and <a class="link" href="ClutterState.html" title="ClutterState"><span class="type">ClutterState</span></a> fully replaces all functionality from the
<a class="link" href="ClutterBehaviour.html" title="ClutterBehaviour"><span class="type">ClutterBehaviour</span></a> classes.</p>
<p>Generally, animations using <a class="link" href="ClutterBehaviour.html" title="ClutterBehaviour"><span class="type">ClutterBehaviour</span></a> sub-classes can be
effectively re-implemented just by using <a class="link" href="ClutterActor.html" title="ClutterActor"><span class="type">ClutterActor</span></a> properties.</p>
<p>Here is an example of an animation using a
<a class="link" href="ClutterBehaviourOpacity.html" title="ClutterBehaviourOpacity"><span class="type">ClutterBehaviourOpacity</span></a> instance:</p>
<div class="informalexample"><pre class="programlisting">
ClutterTimeline *timeline = clutter_timeline_new (250);
ClutterAlpha *alpha = clutter_alpha_new_full (timeline, CLUTTER_LINEAR);
ClutterBehaviour *behaviour = clutter_behaviour_opacity_new (alpha, 255, 0);
clutter_behaviour_apply (behaviour, some_actor);
clutter_timeline_start (timeline);
</pre></div>
<p>The same effect can be achieved by using <a class="link" href="clutter-Implicit-Animations.html#clutter-actor-animate" title="clutter_actor_animate ()"><code class="function">clutter_actor_animate()</code></a> and
the <a class="link" href="ClutterActor.html#ClutterActor--opacity" title="The “opacity” property"><span class="type">“opacity”</span></a> property:</p>
<div class="informalexample"><pre class="programlisting">
clutter_actor_set_opacity (some_actor, 255);
clutter_actor_animate (some_actor, CLUTTER_LINEAR, 250,
"opacity", 0,
NULL);
</pre></div>
<p><a class="link" href="ClutterBehaviour.html" title="ClutterBehaviour"><span class="type">ClutterBehaviour</span></a>s used for continuous animations with looping
timelines can still be effectively replaced by looping animations; for
instance, the following example of a "pulsating" actor using
<a class="link" href="ClutterBehaviourScale.html" title="ClutterBehaviourScale"><span class="type">ClutterBehaviourScale</span></a>:</p>
<div class="informalexample"><pre class="programlisting">
static void
reverse_timeline (ClutterTimeline *timeline)
{
ClutterTimelineDirection dir = clutter_timeline_get_direction (timeline);
if (dir == CLUTTER_TIMELINE_FORWARD)
dir = CLUTTER_TIMELINE_BACKWARD;
else
dir = CLUTTER_TIMELINE_FORWARD;
clutter_timeline_set_direction (timeline, dir);
}
ClutterTimeline *timeline = clutter_timeline_new (500);
ClutterAlpha *alpha = clutter_alpha_new_full (timeline, CLUTTER_LINEAR);
ClutterBehaviour *behaviour;
g_object_set (some_actor, "scale-gravity", CLUTTER_GRAVITY_CENTER, NULL);
behaviour = clutter_behaviour_scale_new (alpha,
1.0, 2.0,
1.0, 2.0);
clutter_behaviour_apply (behaviour, some_actor);
g_signal_connect (timeline,
"completed", G_CALLBACK (reverse_timeline),
NULL);
clutter_timeline_set_loop (timeline);
clutter_timeline_start (timeline);
</pre></div>
<p>The same effect can be achieved using a <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a>:</p>
<div class="informalexample"><pre class="programlisting">
ClutterAnimation *animation =
clutter_actor_animate (some_actor, CLUTTER_LINEAR, 500,
"scale-x", 2.0,
"scale-y", 2.0,
"fixed::scale-gravity", CLUTTER_GRAVITY_CENTER,
NULL);
ClutterTimeline *timeline = clutter_animation_get_timeline (animation);
clutter_timeline_set_repeat_count (timeline, -1);
clutter_timeline_set_auto_reverse (timeline, TRUE);
</pre></div>
<p><a class="link" href="ClutterBehaviour.html" title="ClutterBehaviour"><span class="type">ClutterBehaviour</span></a> sub-classes can be applied to multiple actors, in
order to share the duration and the easing mode. It is possible to use the
same underlying <a class="link" href="ClutterTimeline.html" title="ClutterTimeline"><span class="type">ClutterTimeline</span></a> and <a class="link" href="ClutterAlpha.html" title="ClutterAlpha"><span class="type">ClutterAlpha</span></a> instances with
<a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a> to achieve the same effect. Complex animations, spanning
multiple actors, should use the <a class="link" href="ClutterAnimator.html" title="ClutterAnimator"><span class="type">ClutterAnimator</span></a> and <a class="link" href="ClutterState.html" title="ClutterState"><span class="type">ClutterState</span></a> classes
instead.</p>
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