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<h2><span class="refentrytitle"><a name="libgwydgets-GwyGraphBasics.top_of_page"></a>GwyGraphBasics</span></h2>
<p>GwyGraphBasics — Common graph functions and utilities</p>
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<div class="refsynopsisdiv">
<a name="libgwydgets-GwyGraphBasics.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <libgwydgets/gwydgets.h>
<a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs">GwyGraphActiveAreaSpecs</a>;
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-curve" title="gwy_graph_draw_curve ()">gwy_graph_draw_curve</a> (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwyGraphCurveModel.html" title="GwyGraphCurveModel"><span class="type">GwyGraphCurveModel</span></a> *gcmodel</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-grid" title="gwy_graph_draw_grid ()">gwy_graph_draw_grid</a> (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> nxdata</code></em>,
<em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *x_grid_data</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> nydata</code></em>,
<em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *y_grid_data</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-line" title="gwy_graph_draw_line ()">gwy_graph_draw_line</a> (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</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> x_from</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> y_from</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> x_to</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> y_to</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gdk/gdk-Graphics-Contexts.html#GdkLineStyle"><span class="type">GdkLineStyle</span></a> line_style</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> size</code></em>,
<em class="parameter"><code>const <a href="./../libgwydraw/libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="type">GwyRGBA</span></a> *color</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-point" title="gwy_graph_draw_point ()">gwy_graph_draw_point</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</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> x</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> y</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-gwydgetenums.html#GwyGraphPointType" title="enum GwyGraphPointType"><span class="type">GwyGraphPointType</span></a> type</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> size</code></em>,
<em class="parameter"><code>const <a href="./../libgwydraw/libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="type">GwyRGBA</span></a> *color</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-selection-areas" title="gwy_graph_draw_selection_areas ()">gwy_graph_draw_selection_areas</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraphArea.html" title="GwySelectionGraphArea"><span class="type">GwySelectionGraphArea</span></a> *selection</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-selection-lines" title="gwy_graph_draw_selection_lines ()">gwy_graph_draw_selection_lines</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraphLine.html" title="GwySelectionGraphLine"><span class="type">GwySelectionGraphLine</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk/gtk-Standard-Enumerations.html#GtkOrientation"><span class="type">GtkOrientation</span></a> orientation</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-selection-points" title="gwy_graph_draw_selection_points ()">gwy_graph_draw_selection_points</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraphPoint.html" title="GwySelectionGraphPoint"><span class="type">GwySelectionGraphPoint</span></a> *selection</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-selection-xareas" title="gwy_graph_draw_selection_xareas ()">gwy_graph_draw_selection_xareas</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraph1DArea.html" title="GwySelectionGraph1DArea"><span class="type">GwySelectionGraph1DArea</span></a> *selection</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-draw-selection-yareas" title="gwy_graph_draw_selection_yareas ()">gwy_graph_draw_selection_yareas</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraph1DArea.html" title="GwySelectionGraph1DArea"><span class="type">GwySelectionGraph1DArea</span></a> *selection</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="libgwydgets-GwyGraphBasics.html#gwy-graph-get-n-preset-colors" title="gwy_graph_get_n_preset_colors ()">gwy_graph_get_n_preset_colors</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
const <a href="./../libgwydraw/libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="returnvalue">GwyRGBA</span></a> * <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-get-preset-color" title="gwy_graph_get_preset_color ()">gwy_graph_get_preset_color</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> i</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgwydgets-GwyGraphBasics.description"></a><h2>Description</h2>
</div>
<div class="refsect1">
<a name="libgwydgets-GwyGraphBasics.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyGraphActiveAreaSpecs"></a><h3>GwyGraphActiveAreaSpecs</h3>
<pre class="programlisting">typedef struct {
gint xmin;
gint ymin;
gint height;
gint width;
gdouble real_xmin;
gdouble real_ymin;
gdouble real_height;
gdouble real_width;
gboolean log_x;
gboolean log_y;
} GwyGraphActiveAreaSpecs;
</pre>
<p>
Graph area specification (for graph drawing primitives).
</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#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.xmin"></a>xmin</code></em>;</span></p></td>
<td>X offset of the active area with respect to drawable left border.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.ymin"></a>ymin</code></em>;</span></p></td>
<td>Y offset of the active area with respect to drawable top border.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.height"></a>height</code></em>;</span></p></td>
<td>Active area height in pixels.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.width"></a>width</code></em>;</span></p></td>
<td>Active area width pixels.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.real-xmin"></a>real_xmin</code></em>;</span></p></td>
<td>Minimum x value in real units.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.real-ymin"></a>real_ymin</code></em>;</span></p></td>
<td>Minimum y value in real units.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.real-height"></a>real_height</code></em>;</span></p></td>
<td>Area height in real units.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.real-width"></a>real_width</code></em>;</span></p></td>
<td>Area width in real units.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.log-x"></a>log_x</code></em>;</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 x-axis is logarithmic.</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GwyGraphActiveAreaSpecs.log-y"></a>log_y</code></em>;</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 y-axis is logarithmic.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-curve"></a><h3>gwy_graph_draw_curve ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_curve (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwyGraphCurveModel.html" title="GwyGraphCurveModel"><span class="type">GwyGraphCurveModel</span></a> *gcmodel</code></em>);</pre>
<p>
Draws a single graph curve on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gcmodel</code></em> :</span></p></td>
<td>Curve model of the curve to draw.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-grid"></a><h3>gwy_graph_draw_grid ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_grid (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</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> nxdata</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> *x_grid_data</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> nydata</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> *y_grid_data</code></em>);</pre>
<p>
Draws an array of grid lines on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>nxdata</code></em> :</span></p></td>
<td>Number of x grid positions.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x_grid_data</code></em> :</span></p></td>
<td>Array of grid data for the x-axis, it can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if
<em class="parameter"><code>nxdata</code></em> is zero.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>nydata</code></em> :</span></p></td>
<td>Number of y grid positions.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y_grid_data</code></em> :</span></p></td>
<td>Array of grid data for the y-axis, it can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if
<em class="parameter"><code>nydata</code></em> is zero.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-line"></a><h3>gwy_graph_draw_line ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_line (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</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> x_from</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> y_from</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> x_to</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> y_to</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkLineStyle"><span class="type">GdkLineStyle</span></a> line_style</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> size</code></em>,
<em class="parameter"><code>const <a href="./../libgwydraw/libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="type">GwyRGBA</span></a> *color</code></em>);</pre>
<p>
Draws a line segment on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x_from</code></em> :</span></p></td>
<td>x coordinate of the start point of the line</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y_from</code></em> :</span></p></td>
<td>y coordinate of the start point of the line</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x_to</code></em> :</span></p></td>
<td>x coordinate of the end point of the line</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y_to</code></em> :</span></p></td>
<td>y coordinate of the end point of the line</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>line_style</code></em> :</span></p></td>
<td>graph line style</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>size</code></em> :</span></p></td>
<td>point size</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>point color</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-point"></a><h3>gwy_graph_draw_point ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_point (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</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> x</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> y</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-gwydgetenums.html#GwyGraphPointType" title="enum GwyGraphPointType"><span class="type">GwyGraphPointType</span></a> type</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> size</code></em>,
<em class="parameter"><code>const <a href="./../libgwydraw/libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="type">GwyRGBA</span></a> *color</code></em>);</pre>
<p>
Draws a point on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>X coordinate of the point.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td>Y coordinate of the point.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>type</code></em> :</span></p></td>
<td>graph point type</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>size</code></em> :</span></p></td>
<td>point size</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>point color</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-selection-areas"></a><h3>gwy_graph_draw_selection_areas ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_selection_areas (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraphArea.html" title="GwySelectionGraphArea"><span class="type">GwySelectionGraphArea</span></a> *selection</code></em>);</pre>
<p>
Draws selected area on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection of type <a class="link" href="GwySelectionGraphArea.html" title="GwySelectionGraphArea"><span class="type">GwySelectionGraphArea</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-selection-lines"></a><h3>gwy_graph_draw_selection_lines ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_selection_lines (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraphLine.html" title="GwySelectionGraphLine"><span class="type">GwySelectionGraphLine</span></a> *selection</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk/gtk-Standard-Enumerations.html#GtkOrientation"><span class="type">GtkOrientation</span></a> orientation</code></em>);</pre>
<p>
Draws selected lines on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>a <a class="link" href="GwySelectionGraphLine.html" title="GwySelectionGraphLine"><span class="type">GwySelectionGraphLine</span></a> structure</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>orientation</code></em> :</span></p></td>
<td>horizontal or vertical orientation</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-selection-points"></a><h3>gwy_graph_draw_selection_points ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_selection_points (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraphPoint.html" title="GwySelectionGraphPoint"><span class="type">GwySelectionGraphPoint</span></a> *selection</code></em>);</pre>
<p>
Draws selection points on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection of type <a class="link" href="GwySelectionGraphPoint.html" title="GwySelectionGraphPoint"><span class="type">GwySelectionGraphPoint</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-selection-xareas"></a><h3>gwy_graph_draw_selection_xareas ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_selection_xareas (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraph1DArea.html" title="GwySelectionGraph1DArea"><span class="type">GwySelectionGraph1DArea</span></a> *selection</code></em>);</pre>
<p>
Draws selected x-area on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection of type <a class="link" href="GwySelectionGraph1DArea.html" title="GwySelectionGraph1DArea"><span class="type">GwySelectionGraph1DArea</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-draw-selection-yareas"></a><h3>gwy_graph_draw_selection_yareas ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_graph_draw_selection_yareas (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> *drawable</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gdk/gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a> *gc</code></em>,
<em class="parameter"><code><a class="link" href="libgwydgets-GwyGraphBasics.html#GwyGraphActiveAreaSpecs" title="GwyGraphActiveAreaSpecs"><span class="type">GwyGraphActiveAreaSpecs</span></a> *specs</code></em>,
<em class="parameter"><code><a class="link" href="GwySelectionGraph1DArea.html" title="GwySelectionGraph1DArea"><span class="type">GwySelectionGraph1DArea</span></a> *selection</code></em>);</pre>
<p>
Drawss selected y-area on a drawable.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em> :</span></p></td>
<td>A drawable.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em> :</span></p></td>
<td>Graphics context.
It is modified by this function unpredictably.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specs</code></em> :</span></p></td>
<td>Specifications (boundaries) of the active area of the graph.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>selection</code></em> :</span></p></td>
<td>A selection of type <a class="link" href="GwySelectionGraph1DArea.html" title="GwySelectionGraph1DArea"><span class="type">GwySelectionGraph1DArea</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-get-n-preset-colors"></a><h3>gwy_graph_get_n_preset_colors ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gwy_graph_get_n_preset_colors (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Gets the number of distinct colors <a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-get-preset-color" title="gwy_graph_get_preset_color ()"><code class="function">gwy_graph_get_preset_color()</code></a> can return.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of distinct colors.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-graph-get-preset-color"></a><h3>gwy_graph_get_preset_color ()</h3>
<pre class="programlisting">const <a href="./../libgwydraw/libgwydraw/libgwydraw-GwyRGBA.html#GwyRGBA"><span class="returnvalue">GwyRGBA</span></a> * gwy_graph_get_preset_color (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> i</code></em>);</pre>
<p>
Gets a preset graph color.
</p>
<p>
Preset colors are a set of selected colors one can use to distingush graph
curves when there is no reason to prefer a particular color. Note they
can occasionally change between version, even their number can change.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Color number, starting from 0 which is always black. It can be any
number but colors start to repeat after
<a class="link" href="libgwydgets-GwyGraphBasics.html#gwy-graph-get-n-preset-colors" title="gwy_graph_get_n_preset_colors ()"><code class="function">gwy_graph_get_n_preset_colors()</code></a> colors.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A constant color that must not be neither modified nor freed.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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