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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Gwyddion Widgets Library Reference Manual: GwyShader</title>
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                  <a href="#GwyShader.description" class="shortcut">Description</a>
                   | 
                  <a href="#GwyShader.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#GwyShader.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
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                  <a href="#GwyShader.properties" class="shortcut">Properties</a>
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                  <a href="#GwyShader.signals" class="shortcut">Signals</a>
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<div class="refentry">
<a name="GwyShader"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GwyShader.top_of_page"></a>GwyShader</span></h2>
<p>GwyShader — Spherical angle selector</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GwyShader.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;libgwydgets/gwydgets.h&gt;

struct              <a class="link" href="GwyShader.html#GwyShader-struct" title="struct GwyShader">GwyShader</a>;
struct              <a class="link" href="GwyShader.html#GwyShaderClass" title="struct GwyShaderClass">GwyShaderClass</a>;
<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> *         <a class="link" href="GwyShader.html#gwy-shader-new" title="gwy_shader_new ()">gwy_shader_new</a>                      (<em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *gradient</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyShader.html#gwy-shader-get-theta" title="gwy_shader_get_theta ()">gwy_shader_get_theta</a>                (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyShader.html#gwy-shader-get-phi" title="gwy_shader_get_phi ()">gwy_shader_get_phi</a>                  (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyShader.html#gwy-shader-set-theta" title="gwy_shader_set_theta ()">gwy_shader_set_theta</a>                (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> theta</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyShader.html#gwy-shader-set-phi" title="gwy_shader_set_phi ()">gwy_shader_set_phi</a>                  (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> phi</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyShader.html#gwy-shader-set-angle" title="gwy_shader_set_angle ()">gwy_shader_set_angle</a>                (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> theta</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> phi</code></em>);
const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       <a class="link" href="GwyShader.html#gwy-shader-get-gradient" title="gwy_shader_get_gradient ()">gwy_shader_get_gradient</a>             (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyShader.html#gwy-shader-set-gradient" title="gwy_shader_set_gradient ()">gwy_shader_set_gradient</a>             (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *gradient</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/gtk/gtk2-Standard-Enumerations.html#GtkUpdateType"><span class="returnvalue">GtkUpdateType</span></a>       <a class="link" href="GwyShader.html#gwy-shader-get-update-policy" title="gwy_shader_get_update_policy ()">gwy_shader_get_update_policy</a>        (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyShader.html#gwy-shader-set-update-policy" title="gwy_shader_set_update_policy ()">gwy_shader_set_update_policy</a>        (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/gtk2-Standard-Enumerations.html#GtkUpdateType"><span class="type">GtkUpdateType</span></a> update_policy</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyShader.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----<a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
         +----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkObject.html">GtkObject</a>
               +----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html">GtkWidget</a>
                     +----GwyShader
</pre>
</div>
<div class="refsect1">
<a name="GwyShader.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwyShader implements
 AtkImplementorIface and  <a href="/usr/share/gtk-doc/html/gtk3/GtkBuildable.html">GtkBuildable</a>.</p>
</div>
<div class="refsect1">
<a name="GwyShader.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="GwyShader.html#GwyShader--gradient" title='The "gradient" property'>gradient</a>"                 <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Read / Write
  "<a class="link" href="GwyShader.html#GwyShader--update-policy" title='The "update-policy" property'>update-policy</a>"            <a href="/usr/share/gtk-doc/html/gtk2/gtk2-Standard-Enumerations.html#GtkUpdateType"><span class="type">GtkUpdateType</span></a>         : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="GwyShader.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="GwyShader.html#GwyShader-angle-changed" title='The "angle-changed" signal'>angle-changed</a>"                                  : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
</pre>
</div>
<div class="refsect1">
<a name="GwyShader.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> is a spherical angle selector that allows user to change angle
by simply moving the north pole of a sphere around with mouse.  It can
display the sphere colored with various <a href="../libgwydraw/GwyGradient.html"><span class="type">GwyGradient</span></a>'s.
</p>
</div>
<div class="refsect1">
<a name="GwyShader.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyShader-struct"></a><h3>struct GwyShader</h3>
<pre class="programlisting">struct GwyShader;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyShaderClass"></a><h3>struct GwyShaderClass</h3>
<pre class="programlisting">struct GwyShaderClass {
    GtkWidgetClass parent_class;

    void (*angle_changed)(GwyShader *shader);

    void (*reserved1)(void);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-new"></a><h3>gwy_shader_new ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> *         gwy_shader_new                      (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *gradient</code></em>);</pre>
<p>
Creates a new spherical shader.
</p>
<p>
The widget takes up all the space allocated for it.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gradient</code></em> :</span></p></td>
<td>Name of gradient to color the spehere with.  Can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to
use the default gradient.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The new shader as a <a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html"><span class="type">GtkWidget</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-get-theta"></a><h3>gwy_shader_get_theta ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_shader_get_theta                (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);</pre>
<p>
Returns the theta coordinate of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The theta coordinate, in radians.  Theta coordinate is angle from
sphere's north pole.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-get-phi"></a><h3>gwy_shader_get_phi ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_shader_get_phi                  (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);</pre>
<p>
Returns the phi coordinate of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The phi coordinate, in radians.  Phi coordinate is orientation
in horizontal plane, measured from x axis, counterclockwise.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-set-theta"></a><h3>gwy_shader_set_theta ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_shader_set_theta                (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> theta</code></em>);</pre>
<p>
Sets the theta coordinate of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>theta</code></em> :</span></p></td>
<td>The theta coordinate to set.  See <a class="link" href="GwyShader.html#gwy-shader-get-theta" title="gwy_shader_get_theta ()"><code class="function">gwy_shader_get_theta()</code></a> for
description.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-set-phi"></a><h3>gwy_shader_set_phi ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_shader_set_phi                  (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> phi</code></em>);</pre>
<p>
Sets the phi coordinate of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>phi</code></em> :</span></p></td>
<td>The phi coordinate to set.  See <a class="link" href="GwyShader.html#gwy-shader-get-phi" title="gwy_shader_get_phi ()"><code class="function">gwy_shader_get_phi()</code></a> for description.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-set-angle"></a><h3>gwy_shader_set_angle ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_shader_set_angle                (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> theta</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> phi</code></em>);</pre>
<p>
Sets the spherical angle of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>theta</code></em> :</span></p></td>
<td>The theta coordinate to set.  See <a class="link" href="GwyShader.html#gwy-shader-get-theta" title="gwy_shader_get_theta ()"><code class="function">gwy_shader_get_theta()</code></a> for
description.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>phi</code></em> :</span></p></td>
<td>The phi coordinate to set.  See <a class="link" href="GwyShader.html#gwy-shader-get-phi" title="gwy_shader_get_phi ()"><code class="function">gwy_shader_get_phi()</code></a> for description.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-get-gradient"></a><h3>gwy_shader_get_gradient ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       gwy_shader_get_gradient             (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);</pre>
<p>
Returns the name of color gradient a shader uses.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<col align="left" valign="top">
<col>
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<tbody>
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<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The gradient name.  It must not be modified or freed.  It may
differ the name that was used on initialization or set with
<a class="link" href="GwyShader.html#gwy-shader-set-gradient" title="gwy_shader_set_gradient ()"><code class="function">gwy_shader_set_gradient()</code></a>, if the gradient didn't exist or
was renamed meanwhile.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-set-gradient"></a><h3>gwy_shader_set_gradient ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_shader_set_gradient             (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *gradient</code></em>);</pre>
<p>
Sets the gradient a shader uses.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gradient</code></em> :</span></p></td>
<td>Name of gradient <em class="parameter"><code>shader</code></em> should use.  It should exist.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-get-update-policy"></a><h3>gwy_shader_get_update_policy ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk2/gtk2-Standard-Enumerations.html#GtkUpdateType"><span class="returnvalue">GtkUpdateType</span></a>       gwy_shader_get_update_policy        (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>);</pre>
<p>
Returns the update policy of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
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<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The update policy.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-shader-set-update-policy"></a><h3>gwy_shader_set_update_policy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_shader_set_update_policy        (<em class="parameter"><code><a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *shader</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk2/gtk2-Standard-Enumerations.html#GtkUpdateType"><span class="type">GtkUpdateType</span></a> update_policy</code></em>);</pre>
<p>
Sets the update policy of a shader.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>shader</code></em> :</span></p></td>
<td>A shader.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>update_policy</code></em> :</span></p></td>
<td>The update policy <em class="parameter"><code>shader</code></em> should use.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GwyShader.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GwyShader--gradient"></a><h3>The <code class="literal">"gradient"</code> property</h3>
<pre class="programlisting">  "gradient"                 <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Read / Write</pre>
<p>Name of gradient the sphere is colored with.</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyShader--update-policy"></a><h3>The <code class="literal">"update-policy"</code> property</h3>
<pre class="programlisting">  "update-policy"            <a href="/usr/share/gtk-doc/html/gtk2/gtk2-Standard-Enumerations.html#GtkUpdateType"><span class="type">GtkUpdateType</span></a>         : Read / Write</pre>
<p>When value change causes signal emission.</p>
<p>Default value: GTK_UPDATE_CONTINUOUS</p>
</div>
</div>
<div class="refsect1">
<a name="GwyShader.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GwyShader-angle-changed"></a><h3>The <code class="literal">"angle-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> *gwyshader,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>   user_data)      : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
The ::angle-changed signal is emitted when the spherical angle changes.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwyshader</code></em> :</span></p></td>
<td>The <a class="link" href="GwyShader.html" title="GwyShader"><span class="type">GwyShader</span></a> which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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