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<div class="refentry">
<a name="ClutterAnimatable"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="ClutterAnimatable.top_of_page"></a>ClutterAnimatable</span></h2>
<p>ClutterAnimatable — Interface for animatable classes</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="ClutterAnimatable.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="ClutterAnimatable.html#clutter-animatable-animate-property" title="clutter_animatable_animate_property ()">clutter_animatable_animate_property</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GParamSpec</span> *
</td>
<td class="function_name">
<a class="link" href="ClutterAnimatable.html#clutter-animatable-find-property" title="clutter_animatable_find_property ()">clutter_animatable_find_property</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="ClutterAnimatable.html#clutter-animatable-get-initial-state" title="clutter_animatable_get_initial_state ()">clutter_animatable_get_initial_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="ClutterAnimatable.html#clutter-animatable-set-final-state" title="clutter_animatable_set_final_state ()">clutter_animatable_set_final_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="ClutterAnimatable.html#clutter-animatable-interpolate-value" title="clutter_animatable_interpolate_value ()">clutter_animatable_interpolate_value</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="ClutterAnimatable.html#ClutterAnimatable-struct" title="ClutterAnimatable">ClutterAnimatable</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="ClutterAnimatable.html#ClutterAnimatableIface" title="struct ClutterAnimatableIface">ClutterAnimatableIface</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> GInterface
<span class="lineart">╰──</span> ClutterAnimatable
</pre>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.prerequisites"></a><h2>Prerequisites</h2>
<p>
ClutterAnimatable requires
GObject.</p>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.implementations"></a><h2>Known Implementations</h2>
<p>
ClutterAnimatable is implemented by
<a class="link" href="ClutterActor.html" title="ClutterActor">ClutterActor</a>, <a class="link" href="ClutterBox.html" title="ClutterBox">ClutterBox</a>, <a class="link" href="ClutterCairoTexture.html" title="ClutterCairoTexture">ClutterCairoTexture</a>, <a class="link" href="ClutterClone.html" title="ClutterClone">ClutterClone</a>, <a class="link" href="ClutterGroup.html" title="ClutterGroup">ClutterGroup</a>, <a class="link" href="ClutterRectangle.html" title="ClutterRectangle">ClutterRectangle</a>, <a class="link" href="ClutterScrollActor.html" title="ClutterScrollActor">ClutterScrollActor</a>, <a class="link" href="ClutterStage.html" title="ClutterStage">ClutterStage</a>, <a class="link" href="ClutterText.html" title="ClutterText">ClutterText</a> and <a class="link" href="ClutterTexture.html" title="ClutterTexture">ClutterTexture</a>.</p>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.description"></a><h2>Description</h2>
<p><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> is an interface that allows a <span class="type">GObject</span> class
to control how a <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a> will animate a property.</p>
<p>Each <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> should implement the
<code class="function">ClutterAnimatableIface.interpolate_property()</code> virtual function of the
interface to compute the animation state between two values of an interval
depending on a progress factor, expressed as a floating point value.</p>
<p>If a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> is animated by a <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a>
instance, the <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a> will call
<code class="function">clutter_animatable_interpolate_property()</code> passing the name of the
currently animated property; the values interval; and the progress factor.
The <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> implementation should return the computed value for
the animated
property.</p>
<p><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> is available since Clutter 1.0</p>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="clutter-animatable-animate-property"></a><h3>clutter_animatable_animate_property ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
clutter_animatable_animate_property (<em class="parameter"><code><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> *animatable</code></em>,
<em class="parameter"><code><a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a> *animation</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *property_name</code></em>,
<em class="parameter"><code>const <span class="type">GValue</span> *initial_value</code></em>,
<em class="parameter"><code>const <span class="type">GValue</span> *final_value</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> progress</code></em>,
<em class="parameter"><code><span class="type">GValue</span> *value</code></em>);</pre>
<div class="warning">
<p><code class="literal">clutter_animatable_animate_property</code> has been deprecated since version 1.8 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="ClutterAnimatable.html#clutter-animatable-interpolate-value" title="clutter_animatable_interpolate_value ()"><code class="function">clutter_animatable_interpolate_value()</code></a>
instead</p>
</div>
<p>Calls the <code class="function">animate_property()</code> virtual function for <em class="parameter"><code>animatable</code></em>
.</p>
<p>The <em class="parameter"><code>initial_value</code></em>
and <em class="parameter"><code>final_value</code></em>
<span class="type">GValue</span><!-- -->s must contain
the same type; <em class="parameter"><code>value</code></em>
must have been initialized to the same
type of <em class="parameter"><code>initial_value</code></em>
and <em class="parameter"><code>final_value</code></em>
.</p>
<p>All implementation of the <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> interface must
implement this function.</p>
<div class="refsect3">
<a name="id-1.6.3.4.9.2.9"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>animatable</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>animation</p></td>
<td class="parameter_description"><p>a <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>the name of the animated property</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>initial_value</p></td>
<td class="parameter_description"><p>the initial value of the animation interval</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>final_value</p></td>
<td class="parameter_description"><p>the final value of the animation interval</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p>the progress factor</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>return location for the animation value</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.6.3.4.9.2.10"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the value has been validated and can
be applied to the <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a>, and <code class="literal">FALSE</code> otherwise</p>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.0">1.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-animatable-find-property"></a><h3>clutter_animatable_find_property ()</h3>
<pre class="programlisting"><span class="returnvalue">GParamSpec</span> *
clutter_animatable_find_property (<em class="parameter"><code><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> *animatable</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *property_name</code></em>);</pre>
<p>Finds the <span class="type">GParamSpec</span> for <em class="parameter"><code>property_name</code></em>
</p>
<div class="refsect3">
<a name="id-1.6.3.4.9.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>animatable</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>the name of the animatable property to find</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.6.3.4.9.3.6"></a><h4>Returns</h4>
<p> The <span class="type">GParamSpec</span> for the given property
or <code class="literal">NULL</code>. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix09.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-animatable-get-initial-state"></a><h3>clutter_animatable_get_initial_state ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
clutter_animatable_get_initial_state (<em class="parameter"><code><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> *animatable</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *property_name</code></em>,
<em class="parameter"><code><span class="type">GValue</span> *value</code></em>);</pre>
<p>Retrieves the current state of <em class="parameter"><code>property_name</code></em>
and sets <em class="parameter"><code>value</code></em>
with it</p>
<div class="refsect3">
<a name="id-1.6.3.4.9.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>animatable</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>the name of the animatable property to retrieve</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a <span class="type">GValue</span> initialized to the type of the property to retrieve</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix09.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-animatable-set-final-state"></a><h3>clutter_animatable_set_final_state ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
clutter_animatable_set_final_state (<em class="parameter"><code><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> *animatable</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *property_name</code></em>,
<em class="parameter"><code>const <span class="type">GValue</span> *value</code></em>);</pre>
<p>Sets the current state of <em class="parameter"><code>property_name</code></em>
to <em class="parameter"><code>value</code></em>
</p>
<div class="refsect3">
<a name="id-1.6.3.4.9.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>animatable</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>the name of the animatable property to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the value of the animatable property to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix09.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-animatable-interpolate-value"></a><h3>clutter_animatable_interpolate_value ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
clutter_animatable_interpolate_value (<em class="parameter"><code><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> *animatable</code></em>,
<em class="parameter"><code>const <span class="type">gchar</span> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="clutter-Value-intervals.html#ClutterInterval"><span class="type">ClutterInterval</span></a> *interval</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> progress</code></em>,
<em class="parameter"><code><span class="type">GValue</span> *value</code></em>);</pre>
<p>Asks a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> implementation to interpolate a
a named property between the initial and final values of
a <a class="link" href="clutter-Value-intervals.html#ClutterInterval"><span class="type">ClutterInterval</span></a>, using <em class="parameter"><code>progress</code></em>
as the interpolation
value, and store the result inside <em class="parameter"><code>value</code></em>
.</p>
<p>This function should be used for every property animation
involving <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a><!-- -->s.</p>
<p>This function replaces <a class="link" href="ClutterAnimatable.html#clutter-animatable-animate-property" title="clutter_animatable_animate_property ()"><code class="function">clutter_animatable_animate_property()</code></a>.</p>
<div class="refsect3">
<a name="id-1.6.3.4.9.6.7"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>animatable</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>the name of the property to interpolate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>interval</p></td>
<td class="parameter_description"><p>a <a class="link" href="clutter-Value-intervals.html#ClutterInterval"><span class="type">ClutterInterval</span></a> with the animation range</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p>the progress to use to interpolate between the
initial and final values of the <em class="parameter"><code>interval</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p> return location for an initialized <span class="type">GValue</span>
using the same type of the <em class="parameter"><code>interval</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.6.3.4.9.6.8"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the interpolation was successful,
and <code class="literal">FALSE</code> otherwise</p>
</div>
<p class="since">Since: <a class="link" href="ix11.html#api-index-1.8">1.8</a></p>
</div>
</div>
<div class="refsect1">
<a name="ClutterAnimatable.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="ClutterAnimatable-struct"></a><h3>ClutterAnimatable</h3>
<pre class="programlisting">typedef struct _ClutterAnimatable ClutterAnimatable;</pre>
<p><a class="link" href="ClutterAnimatable.html" title="ClutterAnimatable"><span class="type">ClutterAnimatable</span></a> is an opaque structure whose members cannot be directly
accessed</p>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.0">1.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="ClutterAnimatableIface"></a><h3>struct ClutterAnimatableIface</h3>
<pre class="programlisting">struct ClutterAnimatableIface {
gboolean (* animate_property) (ClutterAnimatable *animatable,
ClutterAnimation *animation,
const gchar *property_name,
const GValue *initial_value,
const GValue *final_value,
gdouble progress,
GValue *value);
GParamSpec *(* find_property) (ClutterAnimatable *animatable,
const gchar *property_name);
void (* get_initial_state) (ClutterAnimatable *animatable,
const gchar *property_name,
GValue *value);
void (* set_final_state) (ClutterAnimatable *animatable,
const gchar *property_name,
const GValue *value);
gboolean (* interpolate_value) (ClutterAnimatable *animatable,
const gchar *property_name,
ClutterInterval *interval,
gdouble progress,
GValue *value);
};
</pre>
<p>Base interface for <span class="type">GObject</span><!-- -->s that can be animated by a
a <a class="link" href="clutter-Implicit-Animations.html#ClutterAnimation"><span class="type">ClutterAnimation</span></a>.</p>
<div class="refsect3">
<a name="id-1.6.3.4.10.3.5"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="ClutterAnimatableIface.animate-property"></a>animate_property</code></em> ()</p></td>
<td class="struct_member_description"><p>virtual function for custom interpolation of a
property. This virtual function is deprecated</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="ClutterAnimatableIface.find-property"></a>find_property</code></em> ()</p></td>
<td class="struct_member_description"><p>virtual function for retrieving the <span class="type">GParamSpec</span> of
an animatable property</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="ClutterAnimatableIface.get-initial-state"></a>get_initial_state</code></em> ()</p></td>
<td class="struct_member_description"><p>virtual function for retrieving the initial
state of an animatable property</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="ClutterAnimatableIface.set-final-state"></a>set_final_state</code></em> ()</p></td>
<td class="struct_member_description"><p>virtual function for setting the state of an
animatable property</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="ClutterAnimatableIface.interpolate-value"></a>interpolate_value</code></em> ()</p></td>
<td class="struct_member_description"><p>virtual function for interpolating the progress
of a property</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.0">1.0</a></p>
</div>
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