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<a href="#GwyDataViewLayer.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#GwyDataViewLayer.signals" class="shortcut">Signals</a>
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<h2><span class="refentrytitle"><a name="GwyDataViewLayer.top_of_page"></a>GwyDataViewLayer</span></h2>
<p>GwyDataViewLayer — Layer GwyDataView is composed of</p>
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<div class="refsynopsisdiv">
<a name="GwyDataViewLayer.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <libgwydgets/gwydgets.h>
struct <a class="link" href="GwyDataViewLayer.html#GwyDataViewLayer-struct" title="struct GwyDataViewLayer">GwyDataViewLayer</a>;
struct <a class="link" href="GwyDataViewLayer.html#GwyDataViewLayerClass" title="struct GwyDataViewLayerClass">GwyDataViewLayerClass</a>;
<span class="returnvalue">void</span> <a class="link" href="GwyDataViewLayer.html#gwy-data-view-layer-plugged" title="gwy_data_view_layer_plugged ()">gwy_data_view_layer_plugged</a> (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyDataViewLayer.html#gwy-data-view-layer-unplugged" title="gwy_data_view_layer_unplugged ()">gwy_data_view_layer_unplugged</a> (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyDataViewLayer.html#gwy-data-view-layer-updated" title="gwy_data_view_layer_updated ()">gwy_data_view_layer_updated</a> (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyDataViewLayer.html#gwy-data-view-layer-realize" title="gwy_data_view_layer_realize ()">gwy_data_view_layer_realize</a> (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyDataViewLayer.html#gwy-data-view-layer-unrealize" title="gwy_data_view_layer_unrealize ()">gwy_data_view_layer_unrealize</a> (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyDataViewLayer.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>
+----GwyDataViewLayer
+----<a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer">GwyPixmapLayer</a>
+----<a class="link" href="GwyVectorLayer.html" title="GwyVectorLayer">GwyVectorLayer</a>
</pre>
</div>
<div class="refsect1">
<a name="GwyDataViewLayer.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GwyDataViewLayer.html#GwyDataViewLayer-plugged" title='The "plugged" signal'>plugged</a>" : <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
"<a class="link" href="GwyDataViewLayer.html#GwyDataViewLayer-unplugged" title='The "unplugged" signal'>unplugged</a>" : <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
"<a class="link" href="GwyDataViewLayer.html#GwyDataViewLayer-updated" title='The "updated" signal'>updated</a>" : <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
</pre>
</div>
<div class="refsect1">
<a name="GwyDataViewLayer.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a>'s are parts of <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>. They are not widgets and
they are not normally usable outside of a data view. The perform a specific
visualization task: drawing the data, drawing mask, or drawing selection.
</p>
</div>
<div class="refsect1">
<a name="GwyDataViewLayer.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyDataViewLayer-struct"></a><h3>struct GwyDataViewLayer</h3>
<pre class="programlisting">struct GwyDataViewLayer;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataViewLayerClass"></a><h3>struct GwyDataViewLayerClass</h3>
<pre class="programlisting">struct GwyDataViewLayerClass {
GtkObjectClass parent_class;
/* Virtual table */
void (*realize)(GwyDataViewLayer *layer);
void (*unrealize)(GwyDataViewLayer *layer);
/* Signals */
void (*plugged)(GwyDataViewLayer *layer);
void (*unplugged)(GwyDataViewLayer *layer);
void (*updated)(GwyDataViewLayer *layer);
void (*reserved1)(void);
void (*reserved2)(void);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-layer-plugged"></a><h3>gwy_data_view_layer_plugged ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_view_layer_plugged (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);</pre>
<p>
Emits a "plugged" singal on a layer.
</p>
<p>
Primarily intended for <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> implementation.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<col align="left" valign="top">
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<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A data view layer.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-layer-unplugged"></a><h3>gwy_data_view_layer_unplugged ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_view_layer_unplugged (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);</pre>
<p>
Emits a "unplugged" singal on a layer.
</p>
<p>
Primarily intended for <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> implementation.
</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>layer</code></em> :</span></p></td>
<td>A data view layer.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-layer-updated"></a><h3>gwy_data_view_layer_updated ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_view_layer_updated (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);</pre>
<p>
Emits a "updated" singal on a layer.
</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>layer</code></em> :</span></p></td>
<td>A data view layer.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-layer-realize"></a><h3>gwy_data_view_layer_realize ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_view_layer_realize (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);</pre>
<p>
Tells a data view layer its parent was realized and it can create
display-specific resources.
</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>layer</code></em> :</span></p></td>
<td>A data view layer.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-layer-unrealize"></a><h3>gwy_data_view_layer_unrealize ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_view_layer_unrealize (<em class="parameter"><code><a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *layer</code></em>);</pre>
<p>
Tells a data view layer its parent was unrealized and it should destroy
display-specific resources.
</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>layer</code></em> :</span></p></td>
<td>A data view layer.</td>
</tr></tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GwyDataViewLayer.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GwyDataViewLayer-plugged"></a><h3>The <code class="literal">"plugged"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *gwydataviewlayer,
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
The ::plugged signal is emitted when a <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> is plugged into
a <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>.
</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>gwydataviewlayer</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</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>
<hr>
<div class="refsect2">
<a name="GwyDataViewLayer-unplugged"></a><h3>The <code class="literal">"unplugged"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *gwydataviewlayer,
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
The ::unplugged signal is emitted when a <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> is removed
from its <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>.
</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>gwydataviewlayer</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</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>
<hr>
<div class="refsect2">
<a name="GwyDataViewLayer-updated"></a><h3>The <code class="literal">"updated"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> *gwydataviewlayer,
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
The ::updated signal is emitted when a <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> is updated;
the exact means how a layer can be updated depends its type.
</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>gwydataviewlayer</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</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 class="refsect1">
<a name="GwyDataViewLayer.see-also"></a><h2>See Also</h2>
<a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> -- data display widget,
<a href="../libgwydraw/libgwydraw-gwypixfield.html">gwypixfield</a> --
low level functions for painting data fields,
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