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<a href="#GwySelection.description" class="shortcut">Description</a>
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<a href="#GwySelection.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#GwySelection.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
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<a href="#GwySelection.signals" class="shortcut">Signals</a>
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<h2><span class="refentrytitle"><a name="GwySelection.top_of_page"></a>GwySelection</span></h2>
<p>GwySelection — Data selection base class</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GwySelection.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <libdraw/gwydraw.h>
struct <a class="link" href="GwySelection.html#GwySelection-struct" title="struct GwySelection">GwySelection</a>;
struct <a class="link" href="GwySelection.html#GwySelectionClass" title="struct GwySelectionClass">GwySelectionClass</a>;
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (<a class="link" href="GwySelection.html#GwySelectionFilterFunc" title="GwySelectionFilterFunc ()">*GwySelectionFilterFunc</a>) (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-changed" title="gwy_selection_changed ()">gwy_selection_changed</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-clear" title="gwy_selection_clear ()">gwy_selection_clear</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-crop" title="gwy_selection_crop ()">gwy_selection_crop</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</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> xmin</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> ymin</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> xmax</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> ymax</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-delete-object" title="gwy_selection_delete_object ()">gwy_selection_delete_object</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);
#define <a class="link" href="GwySelection.html#gwy-selection-duplicate" title="gwy_selection_duplicate()">gwy_selection_duplicate</a> (selection)
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-filter" title="gwy_selection_filter ()">gwy_selection_filter</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a class="link" href="GwySelection.html#GwySelectionFilterFunc" title="GwySelectionFilterFunc ()"><span class="type">GwySelectionFilterFunc</span></a> filter</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-finished" title="gwy_selection_finished ()">gwy_selection_finished</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="GwySelection.html#gwy-selection-get-data" title="gwy_selection_get_data ()">gwy_selection_get_data</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</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> *data</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="GwySelection.html#gwy-selection-get-max-objects" title="gwy_selection_get_max_objects ()">gwy_selection_get_max_objects</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GwySelection.html#gwy-selection-get-object" title="gwy_selection_get_object ()">gwy_selection_get_object</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</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> *data</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="GwySelection.html#gwy-selection-get-object-size" title="gwy_selection_get_object_size ()">gwy_selection_get_object_size</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GwySelection.html#gwy-selection-is-full" title="gwy_selection_is_full ()">gwy_selection_is_full</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-set-data" title="gwy_selection_set_data ()">gwy_selection_set_data</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> nselected</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwySelection.html#gwy-selection-set-max-objects" title="gwy_selection_set_max_objects ()">gwy_selection_set_max_objects</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> max_objects</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="GwySelection.html#gwy-selection-set-object" title="gwy_selection_set_object ()">gwy_selection_set_object</a> (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *data</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwySelection.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----GwySelection
</pre>
</div>
<div class="refsect1">
<a name="GwySelection.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwySelection implements
<a href="./../libgwyddion/libgwyddion/GwySerializable.html">GwySerializable</a>.</p>
</div>
<div class="refsect1">
<a name="GwySelection.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GwySelection.html#GwySelection--max-objects" title='The "max-objects" property'>max-objects</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> : Read / Write
"<a class="link" href="GwySelection.html#GwySelection--object-size" title='The "object-size" property'>object-size</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> : Read
</pre>
</div>
<div class="refsect1">
<a name="GwySelection.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GwySelection.html#GwySelection-changed" title='The "changed" signal'>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>
"<a class="link" href="GwySelection.html#GwySelection-finished" title='The "finished" signal'>finished</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="GwySelection.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> is an abstract class representing data selections. Particular
selection types are defined by vector layer modules.
</p>
<p>
Selections behave as flat arrays of coordinates. They are however logically
split into selection objects (points, lines, rectangles), characteristic for
each selection type. For example, to describe a horizontal line one needs
only one coordinate, for a point two coordinates are needed, rectangle or
arbitrary line need four. <a class="link" href="GwySelection.html#gwy-selection-get-object-size" title="gwy_selection_get_object_size ()"><code class="function">gwy_selection_get_object_size()</code></a> can be used to
generically determine the number of coordinates used to describe a one
selection object.
</p>
<p>
The number of selection objects in a selection can vary,
<a class="link" href="GwySelection.html#gwy-selection-set-max-objects" title="gwy_selection_set_max_objects ()"><code class="function">gwy_selection_set_max_objects()</code></a> sets the maximum possible number. Functions
for getting and setting individual selection objects
(<a class="link" href="GwySelection.html#gwy-selection-get-object" title="gwy_selection_get_object ()"><code class="function">gwy_selection_get_object()</code></a>, <a class="link" href="GwySelection.html#gwy-selection-set-object" title="gwy_selection_set_object ()"><code class="function">gwy_selection_set_object()</code></a>) or complete
selection (<a class="link" href="GwySelection.html#gwy-selection-get-data" title="gwy_selection_get_data ()"><code class="function">gwy_selection_get_data()</code></a>, <a class="link" href="GwySelection.html#gwy-selection-set-data" title="gwy_selection_set_data ()"><code class="function">gwy_selection_set_data()</code></a>) are
available. The method <a class="link" href="GwySelection.html#gwy-selection-set-data" title="gwy_selection_set_data ()"><code class="function">gwy_selection_set_data()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> second argument
is also used to determine the number of selected object.
</p>
</div>
<div class="refsect1">
<a name="GwySelection.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwySelection-struct"></a><h3>struct GwySelection</h3>
<pre class="programlisting">struct GwySelection;</pre>
<p>
The <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> struct describes an abstract selection as a collection
of coordinates. It should not be accessed directly except selection
class implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GwySelectionClass"></a><h3>struct GwySelectionClass</h3>
<pre class="programlisting">struct GwySelectionClass {
guint object_size;
/* Virtual table */
void (*clear)(GwySelection *selection);
gboolean(*get_object)(GwySelection *selection,
gint i,
gdouble *data);
gint (*set_object)(GwySelection *selection,
gint i,
const gdouble *data);
void (*delete_object)(GwySelection *selection,
gint i);
gint (*get_data)(GwySelection *selection,
gdouble *data);
void (*set_data)(GwySelection *selection,
gint nselected,
const gdouble *data);
void (*set_max_objects)(GwySelection *selection,
guint max_objects);
/* Signals */
void (*changed)(GwySelection *selection,
gint i);
void (*finished)(GwySelection *selection);
};
</pre>
<p>
The virtual methods and data memebers of <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a>s.
</p>
<p>
Typically, the only field subclasses set in their class init method is
<em class="parameter"><code>object_size</code></em>. The methods are implemented generically in <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a>
and need not be overriden.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GwySelectionClass.object-size"></a>object_size</code></em>;</span></p></td>
<td>The number of coordinates that form one selection object.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.clear"></a>clear</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-clear" title="gwy_selection_clear ()"><code class="function">gwy_selection_clear()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.get-object"></a>get_object</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-get-object" title="gwy_selection_get_object ()"><code class="function">gwy_selection_get_object()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.set-object"></a>set_object</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-set-object" title="gwy_selection_set_object ()"><code class="function">gwy_selection_set_object()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.delete-object"></a>delete_object</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-delete-object" title="gwy_selection_delete_object ()"><code class="function">gwy_selection_delete_object()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.get-data"></a>get_data</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-get-data" title="gwy_selection_get_data ()"><code class="function">gwy_selection_get_data()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.set-data"></a>set_data</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-set-data" title="gwy_selection_set_data ()"><code class="function">gwy_selection_set_data()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.set-max-objects"></a>set_max_objects</code></em> ()</span></p></td>
<td>The <a class="link" href="GwySelection.html#gwy-selection-set-max-objects" title="gwy_selection_set_max_objects ()"><code class="function">gwy_selection_set_max_objects()</code></a> virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.changed"></a>changed</code></em> ()</span></p></td>
<td>The "changed" signal virtual method.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GwySelectionClass.finished"></a>finished</code></em> ()</span></p></td>
<td>The "finished" signal virtual method.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GwySelectionFilterFunc"></a><h3>GwySelectionFilterFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (*GwySelectionFilterFunc) (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>
Type of selection filtering function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Index of object to consider.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>User data passed to <a class="link" href="GwySelection.html#gwy-selection-filter" title="gwy_selection_filter ()"><code class="function">gwy_selection_filter()</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for objects that should be kept, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> for objects that
should be removed.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-changed"></a><h3>gwy_selection_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_changed (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);</pre>
<p>
Emits "changed" signal on a selection.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Index of object that changed. Use -1 when not applicable, e.g., when
complete selection was changed, cleared, or truncated.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-clear"></a><h3>gwy_selection_clear ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_clear (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);</pre>
<p>
Clears a selection.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-crop"></a><h3>gwy_selection_crop ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_crop (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</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> xmin</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> ymin</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> xmax</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> ymax</code></em>);</pre>
<p>
Limits objects in a selection to a rectangle.
</p>
<p>
Objects that are fully outside specified rectangle are removed. Objects
partially outside may be removed or cut, depending on what makes sense for
the specific selection type. If the selection class does not implement this
method then all objects are removed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xmin</code></em> :</span></p></td>
<td>Minimum x-coordinate.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ymin</code></em> :</span></p></td>
<td>Minimum y-coordinate.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xmax</code></em> :</span></p></td>
<td>Maximum x-coordinate.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ymax</code></em> :</span></p></td>
<td>Maximum y-coordinate.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-delete-object"></a><h3>gwy_selection_delete_object ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_delete_object (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);</pre>
<p>
Deletes a one selection object.
</p>
<p>
Since there cannot be holes in the object list, the rest of selection
objects is moved to close the gap.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Index of object to delete.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-duplicate"></a><h3>gwy_selection_duplicate()</h3>
<pre class="programlisting">#define gwy_selection_duplicate(selection)</pre>
<p>
Convenience macro doing <a href="./../libgwyddion/libgwyddion/GwySerializable.html#gwy-serializable-duplicate"><code class="function">gwy_serializable_duplicate()</code></a> with all the necessary
typecasting.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>An selection to duplicate.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-filter"></a><h3>gwy_selection_filter ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_filter (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a class="link" href="GwySelection.html#GwySelectionFilterFunc" title="GwySelectionFilterFunc ()"><span class="type">GwySelectionFilterFunc</span></a> filter</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>
Removes selection objects matching certain criteria.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>filter</code></em> :</span></p></td>
<td>Function returning <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for objects that should be kept, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>
for objects that should be removed.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>User data passed to <em class="parameter"><code>filter</code></em>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-finished"></a><h3>gwy_selection_finished ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_finished (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);</pre>
<p>
Emits "finished" signal on a selection.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-get-data"></a><h3>gwy_selection_get_data ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> gwy_selection_get_data (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</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> *data</code></em>);</pre>
<p>
Gets selection data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>Array to store selection data to. Selection data is an
array of coordinates whose precise meaning is defined by particular
selection types. It may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of selected objects. This is *not* the required size
of <em class="parameter"><code>data</code></em>, which must be at least <a class="link" href="GwySelection.html#gwy-selection-get-object-size" title="gwy_selection_get_object_size ()"><code class="function">gwy_selection_get_object_size()</code></a>
times larger.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-get-max-objects"></a><h3>gwy_selection_get_max_objects ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gwy_selection_get_max_objects (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);</pre>
<p>
Gets the maximum number of selected objects.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The maximum number of selected objects;</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-get-object"></a><h3>gwy_selection_get_object ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gwy_selection_get_object (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</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> *data</code></em>);</pre>
<p>
Gets one selection object.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Index of object to get.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>Array to store selection object data to. Object data is an
array of coordinates whose precise meaning is defined by particular
selection types.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if there was such an object and <em class="parameter"><code>data</code></em> was filled.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-get-object-size"></a><h3>gwy_selection_get_object_size ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gwy_selection_get_object_size (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);</pre>
<p>
Gets the number of coordinates that make up a one selection object.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of coordinates in one selection object.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-is-full"></a><h3>gwy_selection_is_full ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gwy_selection_is_full (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>);</pre>
<p>
Checks whether the maximum number of objects is selected.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when the maximum possible number of objects is selected,
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-set-data"></a><h3>gwy_selection_set_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_set_data (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> nselected</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *data</code></em>);</pre>
<p>
Sets selection data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>nselected</code></em> :</span></p></td>
<td>The number of selected objects.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>Selection data, that is an array <em class="parameter"><code>nselected</code></em> *
<a class="link" href="GwySelection.html#gwy-selection-get-object-size" title="gwy_selection_get_object_size ()"><code class="function">gwy_selection_get_object_size()</code></a> long with selected object
coordinates.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-set-max-objects"></a><h3>gwy_selection_set_max_objects ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_selection_set_max_objects (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> max_objects</code></em>);</pre>
<p>
Sets the maximum number of objects allowed to select.
</p>
<p>
When selection reaches this number of selected objects, it emits
"finished" signal.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>max_objects</code></em> :</span></p></td>
<td>The maximum number of objects allowed to select. Note
particular selection types may allow only specific values.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-selection-set-object"></a><h3>gwy_selection_set_object ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> gwy_selection_set_object (<em class="parameter"><code><a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *data</code></em>);</pre>
<p>
Sets one selection object.
</p>
<p>
This method can be also used to append objects (if the maximum number is
not exceeded). Since there cannot be holes in the object list, <em class="parameter"><code>i</code></em> must be
then equal to either the number of selected objects or special value -1
meaning append to end.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Index of object to set.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>Object selection data. It's an array of coordinates whose precise
meaning is defined by particular selection types.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The index of actually set object (useful namely when <em class="parameter"><code>i</code></em> is -1).</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GwySelection.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GwySelection--max-objects"></a><h3>The <code class="literal">"max-objects"</code> property</h3>
<pre class="programlisting"> "max-objects" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> : Read / Write</pre>
<p>Maximum number of objects that can be selected.</p>
<p>Allowed values: <= 1024</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GwySelection--object-size"></a><h3>The <code class="literal">"object-size"</code> property</h3>
<pre class="programlisting"> "object-size" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> : Read</pre>
<p>Number of coordinates in one selection object.</p>
<p>Allowed values: <= 1024</p>
<p>Default value: 0</p>
</div>
</div>
<div class="refsect1">
<a name="GwySelection.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GwySelection-changed"></a><h3>The <code class="literal">"changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *gwyselection,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> arg1,
<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 ::changed signal is emitted whenever selection changes.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwyselection</code></em> :</span></p></td>
<td>The <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>arg1</code></em> :</span></p></td>
<td>Changed object position hint. If the value is nonnegative, only
this object has changed. If it's negative, the selection has
to be treated as completely changed.</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="GwySelection-finished"></a><h3>The <code class="literal">"finished"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> *gwyselection,
<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 ::finished signal is emitted when selection is finished.
</p>
<p>
What exactly finished means is defined by corresponding
<a href="./../libgwydgets/libgwydgets/GwyVectorLayer.html"><span class="type">GwyVectorLayer</span></a>, but normally it involves user stopped changing
a selection object. Selections never emit this signal themselves.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwyselection</code></em> :</span></p></td>
<td>The <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</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="GwySelection.see-also"></a><h2>See Also</h2>
<a href="./../libgwydgets/libgwydgets/GwyVectorLayer.html"><span class="type">GwyVectorLayer</span></a> -- uses <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> for selections,
<a href="./../libgwydgets/libgwydgets/GwyGraphArea.html"><span class="type">GwyGraphArea</span></a> -- uses <a class="link" href="GwySelection.html" title="GwySelection"><span class="type">GwySelection</span></a> for selections
</div>
</div>
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