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<a name="GwyCurve"></a><div class="titlepage"></div>
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<td valign="top">
<h2><span class="refentrytitle"><a name="GwyCurve.top_of_page"></a>GwyCurve</span></h2>
<p>GwyCurve — Widget that displays editable curves</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GwyCurve.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <libgwydgets/gwydgets.h>
struct <a class="link" href="GwyCurve.html#GwyCurve-struct" title="struct GwyCurve">GwyCurve</a>;
struct <a class="link" href="GwyCurve.html#GwyCurveClass" title="struct GwyCurveClass">GwyCurveClass</a>;
<a class="link" href="GwyCurve.html#GwyPoint" title="GwyPoint">GwyPoint</a>;
<a class="link" href="GwyCurve.html#GwyChannelData" title="GwyChannelData">GwyChannelData</a>;
<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> * <a class="link" href="GwyCurve.html#gwy-curve-new" title="gwy_curve_new ()">gwy_curve_new</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyCurve.html#gwy-curve-reset" title="gwy_curve_reset ()">gwy_curve_reset</a> (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyCurve.html#gwy-curve-set-range" title="gwy_curve_set_range ()">gwy_curve_set_range</a> (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</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> min_x</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> max_x</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> min_y</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> max_y</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyCurve.html#gwy-curve-set-curve-type" title="gwy_curve_set_curve_type ()">gwy_curve_set_curve_type</a> (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-gwydgetenums.html#GwyCurveType" title="enum GwyCurveType"><span class="type">GwyCurveType</span></a> type</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyCurve.html#gwy-curve-set-channels" title="gwy_curve_set_channels ()">gwy_curve_set_channels</a> (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</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> num_channels</code></em>,
<em class="parameter"><code><a href="../libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="type">GwyRGBA</span></a> *colors</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyCurve.html#gwy-curve-set-control-points" title="gwy_curve_set_control_points ()">gwy_curve_set_control_points</a> (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>,
<em class="parameter"><code><a class="link" href="GwyCurve.html#GwyChannelData" title="GwyChannelData"><span class="type">GwyChannelData</span></a> *channel_data</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> prune</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyCurve.html#gwy-curve-get-control-points" title="gwy_curve_get_control_points ()">gwy_curve_get_control_points</a> (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>,
<em class="parameter"><code><a class="link" href="GwyCurve.html#GwyChannelData" title="GwyChannelData"><span class="type">GwyChannelData</span></a> *channel_data</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> triplets</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyCurve.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>
+----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkDrawingArea.html">GtkDrawingArea</a>
+----GwyCurve
</pre>
</div>
<div class="refsect1">
<a name="GwyCurve.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwyCurve implements
AtkImplementorIface and <a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkBuildable.html">GtkBuildable</a>.</p>
</div>
<div class="refsect1">
<a name="GwyCurve.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GwyCurve.html#GwyCurve--curve-type" title='The "curve-type" property'>curve-type</a>" <a class="link" href="libgwydgets-gwydgetenums.html#GwyCurveType" title="enum GwyCurveType"><span class="type">GwyCurveType</span></a> : Read / Write
"<a class="link" href="GwyCurve.html#GwyCurve--max-x" title='The "max-x" property'>max-x</a>" <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write
"<a class="link" href="GwyCurve.html#GwyCurve--max-y" title='The "max-y" property'>max-y</a>" <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write
"<a class="link" href="GwyCurve.html#GwyCurve--min-x" title='The "min-x" property'>min-x</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write
"<a class="link" href="GwyCurve.html#GwyCurve--min-y" title='The "min-y" property'>min-y</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write
"<a class="link" href="GwyCurve.html#GwyCurve--snap" title='The "snap" property'>snap</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="GwyCurve.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GwyCurve.html#GwyCurve-curve-edited" title='The "curve-edited" signal'>curve-edited</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="GwyCurve.html#GwyCurve-curve-type-changed" title='The "curve-type-changed" signal'>curve-type-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="GwyCurve.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> is a widget that can display multiple curves.
The user can edit these curves by clicking and dragging control points.
New control points are created when a user clicks on a part of a curve
where there are no control points.
Control points can be deleted by dragging ontop of another control point.
</p>
</div>
<div class="refsect1">
<a name="GwyCurve.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyCurve-struct"></a><h3>struct GwyCurve</h3>
<pre class="programlisting">struct GwyCurve;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyCurveClass"></a><h3>struct GwyCurveClass</h3>
<pre class="programlisting">struct GwyCurveClass {
GtkDrawingAreaClass parent_class;
/* Signals */
void (*curve_type_changed)(GwyCurve *curve);
void (*curve_edited)(GwyCurve *curve);
/* Padding for future expansion */
void (*_gwy_reserved1) (void);
void (*_gwy_reserved2) (void);
void (*_gwy_reserved3) (void);
void (*_gwy_reserved4) (void);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyPoint"></a><h3>GwyPoint</h3>
<pre class="programlisting">typedef struct {
gdouble x;
gdouble y;
} GwyPoint;
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyChannelData"></a><h3>GwyChannelData</h3>
<pre class="programlisting">typedef struct {
/* curve points: */
gint num_points;
GwyPoint *points;
/* control points: */
gint num_ctlpoints;
GwyPoint *ctlpoints;
GwyRGBA color;
} GwyChannelData;
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-new"></a><h3>gwy_curve_new ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> * gwy_curve_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Creates <a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> widget. By default, the widget will have 3 curves.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>new <a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> widget.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-reset"></a><h3>gwy_curve_reset ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_curve_reset (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>);</pre>
<p>
Removes all control points, resetting the curves to their initial state.
</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>curve</code></em> :</span></p></td>
<td>a <a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> widget.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-set-range"></a><h3>gwy_curve_set_range ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_curve_set_range (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</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> min_x</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> max_x</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> min_y</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> max_y</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-set-curve-type"></a><h3>gwy_curve_set_curve_type ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_curve_set_curve_type (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-gwydgetenums.html#GwyCurveType" title="enum GwyCurveType"><span class="type">GwyCurveType</span></a> type</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-set-channels"></a><h3>gwy_curve_set_channels ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_curve_set_channels (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</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> num_channels</code></em>,
<em class="parameter"><code><a href="../libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="type">GwyRGBA</span></a> *colors</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-set-control-points"></a><h3>gwy_curve_set_control_points ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_curve_set_control_points (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>,
<em class="parameter"><code><a class="link" href="GwyCurve.html#GwyChannelData" title="GwyChannelData"><span class="type">GwyChannelData</span></a> *channel_data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> prune</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-curve-get-control-points"></a><h3>gwy_curve_get_control_points ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_curve_get_control_points (<em class="parameter"><code><a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *curve</code></em>,
<em class="parameter"><code><a class="link" href="GwyCurve.html#GwyChannelData" title="GwyChannelData"><span class="type">GwyChannelData</span></a> *channel_data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> triplets</code></em>);</pre>
<p>
</p>
</div>
</div>
<div class="refsect1">
<a name="GwyCurve.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GwyCurve--curve-type"></a><h3>The <code class="literal">"curve-type"</code> property</h3>
<pre class="programlisting"> "curve-type" <a class="link" href="libgwydgets-gwydgetenums.html#GwyCurveType" title="enum GwyCurveType"><span class="type">GwyCurveType</span></a> : Read / Write</pre>
<p>Is this curve linear, spline interpolated, or free-form.</p>
<p>Default value: GWY_CURVE_TYPE_LINEAR</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyCurve--max-x"></a><h3>The <code class="literal">"max-x"</code> property</h3>
<pre class="programlisting"> "max-x" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write</pre>
<p>Maximum possible X value.</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyCurve--max-y"></a><h3>The <code class="literal">"max-y"</code> property</h3>
<pre class="programlisting"> "max-y" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write</pre>
<p>Maximum possible value for Y.</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyCurve--min-x"></a><h3>The <code class="literal">"min-x"</code> property</h3>
<pre class="programlisting"> "min-x" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write</pre>
<p>Minimum possible value for X.</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyCurve--min-y"></a><h3>The <code class="literal">"min-y"</code> property</h3>
<pre class="programlisting"> "min-y" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a> : Read / Write</pre>
<p>Minimum possible value for Y.</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyCurve--snap"></a><h3>The <code class="literal">"snap"</code> property</h3>
<pre class="programlisting"> "snap" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Snap to control points mode.</p>
<p>Default value: TRUE</p>
</div>
</div>
<div class="refsect1">
<a name="GwyCurve.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GwyCurve-curve-edited"></a><h3>The <code class="literal">"curve-edited"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *gwycurve,
<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>
</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>gwycurve</code></em> :</span></p></td>
<td>the object 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>
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<div class="refsect2">
<a name="GwyCurve-curve-type-changed"></a><h3>The <code class="literal">"curve-type-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GwyCurve.html" title="GwyCurve"><span class="type">GwyCurve</span></a> *gwycurve,
<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>
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<td><p><span class="term"><em class="parameter"><code>gwycurve</code></em> :</span></p></td>
<td>the object 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>
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