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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Gwyddion Widgets Library Reference Manual: GwyDataView</title>
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                  <a href="#GwyDataView.description" class="shortcut">Description</a>
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                  <a href="#GwyDataView.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a name="GwyDataView"></a><div class="titlepage"></div>
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<td valign="top">
<h2><span class="refentrytitle"><a name="GwyDataView.top_of_page"></a>GwyDataView</span></h2>
<p>GwyDataView — Data field displaying area</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GwyDataView.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;libgwydgets/gwydgets.h&gt;

struct              <a class="link" href="GwyDataView.html#GwyDataView-struct" title="struct GwyDataView">GwyDataView</a>;
struct              <a class="link" href="GwyDataView.html#GwyDataViewClass" title="struct GwyDataViewClass">GwyDataViewClass</a>;
<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> *         <a class="link" href="GwyDataView.html#gwy-data-view-new" title="gwy_data_view_new ()">gwy_data_view_new</a>                   (<em class="parameter"><code><a href="../libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> *data</code></em>);
<a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="returnvalue">GwyPixmapLayer</span></a> *    <a class="link" href="GwyDataView.html#gwy-data-view-get-base-layer" title="gwy_data_view_get_base_layer ()">gwy_data_view_get_base_layer</a>        (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-set-base-layer" title="gwy_data_view_set_base_layer ()">gwy_data_view_set_base_layer</a>        (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="type">GwyPixmapLayer</span></a> *layer</code></em>);
<a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="returnvalue">GwyPixmapLayer</span></a> *    <a class="link" href="GwyDataView.html#gwy-data-view-get-alpha-layer" title="gwy_data_view_get_alpha_layer ()">gwy_data_view_get_alpha_layer</a>       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-set-alpha-layer" title="gwy_data_view_set_alpha_layer ()">gwy_data_view_set_alpha_layer</a>       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="type">GwyPixmapLayer</span></a> *layer</code></em>);
<a class="link" href="GwyVectorLayer.html" title="GwyVectorLayer"><span class="returnvalue">GwyVectorLayer</span></a> *    <a class="link" href="GwyDataView.html#gwy-data-view-get-top-layer" title="gwy_data_view_get_top_layer ()">gwy_data_view_get_top_layer</a>         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-set-top-layer" title="gwy_data_view_set_top_layer ()">gwy_data_view_set_top_layer</a>         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyVectorLayer.html" title="GwyVectorLayer"><span class="type">GwyVectorLayer</span></a> *layer</code></em>);
const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       <a class="link" href="GwyDataView.html#gwy-data-view-get-data-prefix" title="gwy_data_view_get_data_prefix ()">gwy_data_view_get_data_prefix</a>       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-set-data-prefix" title="gwy_data_view_set_data_prefix ()">gwy_data_view_set_data_prefix</a>       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *prefix</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataView.html#gwy-data-view-get-hexcess" title="gwy_data_view_get_hexcess ()">gwy_data_view_get_hexcess</a>           (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataView.html#gwy-data-view-get-vexcess" title="gwy_data_view_get_vexcess ()">gwy_data_view_get_vexcess</a>           (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-set-zoom" title="gwy_data_view_set_zoom ()">gwy_data_view_set_zoom</a>              (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> zoom</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataView.html#gwy-data-view-get-zoom" title="gwy_data_view_get_zoom ()">gwy_data_view_get_zoom</a>              (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataView.html#gwy-data-view-get-real-zoom" title="gwy_data_view_get_real_zoom ()">gwy_data_view_get_real_zoom</a>         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<a href="../libgwyddion/GwyContainer.html"><span class="returnvalue">GwyContainer</span></a> *      <a class="link" href="GwyDataView.html#gwy-data-view-get-data" title="gwy_data_view_get_data ()">gwy_data_view_get_data</a>              (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-coords-xy-clamp" title="gwy_data_view_coords_xy_clamp ()">gwy_data_view_coords_xy_clamp</a>       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xscr</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> *yscr</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-coords-xy-cut-line" title="gwy_data_view_coords_xy_cut_line ()">gwy_data_view_coords_xy_cut_line</a>    (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *x0scr</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> *y0scr</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> *x1scr</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> *y1scr</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-coords-xy-to-real" title="gwy_data_view_coords_xy_to_real ()">gwy_data_view_coords_xy_to_real</a>     (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> xscr</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> yscr</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> *xreal</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> *yreal</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-coords-real-to-xy" title="gwy_data_view_coords_real_to_xy ()">gwy_data_view_coords_real_to_xy</a>     (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> xreal</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> yreal</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> *xscr</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> *yscr</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataView.html#gwy-data-view-get-xmeasure" title="gwy_data_view_get_xmeasure ()">gwy_data_view_get_xmeasure</a>          (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataView.html#gwy-data-view-get-ymeasure" title="gwy_data_view_get_ymeasure ()">gwy_data_view_get_ymeasure</a>          (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-get-pixel-data-sizes" title="gwy_data_view_get_pixel_data_sizes ()">gwy_data_view_get_pixel_data_sizes</a>  (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xres</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> *yres</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-get-real-data-sizes" title="gwy_data_view_get_real_data_sizes ()">gwy_data_view_get_real_data_sizes</a>   (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xreal</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> *yreal</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-get-real-data-offsets" title="gwy_data_view_get_real_data_offsets ()">gwy_data_view_get_real_data_offsets</a> (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xoffset</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> *yoffset</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataView.html#gwy-data-view-get-metric" title="gwy_data_view_get_metric ()">gwy_data_view_get_metric</a>            (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *metric</code></em>);
<a href="/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="returnvalue">GdkPixbuf</span></a> *         <a class="link" href="GwyDataView.html#gwy-data-view-get-pixbuf" title="gwy_data_view_get_pixbuf ()">gwy_data_view_get_pixbuf</a>            (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> max_width</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> max_height</code></em>);
<a href="/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="returnvalue">GdkPixbuf</span></a> *         <a class="link" href="GwyDataView.html#gwy-data-view-export-pixbuf" title="gwy_data_view_export_pixbuf ()">gwy_data_view_export_pixbuf</a>         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> zoom</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> draw_alpha</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> draw_top</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyDataView.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>
   +----<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
         +----<a href="/usr/share/gtk-doc/html/gtk2/GtkObject.html">GtkObject</a>
               +----<a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html">GtkWidget</a>
                     +----GwyDataView
</pre>
</div>
<div class="refsect1">
<a name="GwyDataView.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwyDataView implements
 AtkImplementorIface and  <a href="/usr/share/gtk-doc/html/gtk3/GtkBuildable.html">GtkBuildable</a>.</p>
</div>
<div class="refsect1">
<a name="GwyDataView.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="GwyDataView.html#GwyDataView--data-prefix" title='The "data-prefix" property'>data-prefix</a>"              <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Read / Write
  "<a class="link" href="GwyDataView.html#GwyDataView--zoom" title='The "zoom" property'>zoom</a>"                     <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="GwyDataView.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="GwyDataView.html#GwyDataView-layer-plugged" title='The "layer-plugged" signal'>layer-plugged</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="GwyDataView.html#GwyDataView-layer-unplugged" title='The "layer-unplugged" signal'>layer-unplugged</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="GwyDataView.html#GwyDataView-redrawn" title='The "redrawn" signal'>redrawn</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="GwyDataView.html#GwyDataView-resized" title='The "resized" signal'>resized</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="GwyDataView.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> is a basic two-dimensional data display widget.  The actual
rendering is performed by one or more <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a>'s, pluggable into
the data view.  Each layer generally displays different data field from
the container supplied to <a class="link" href="GwyDataView.html#gwy-data-view-new" title="gwy_data_view_new ()"><code class="function">gwy_data_view_new()</code></a>.
</p>
<p>
A base layer (set with <a class="link" href="GwyDataView.html#gwy-data-view-set-base-layer" title="gwy_data_view_set_base_layer ()"><code class="function">gwy_data_view_set_base_layer()</code></a>) must be always
present, and normally it is always a <a class="link" href="GwyLayerBasic.html" title="GwyLayerBasic"><span class="type">GwyLayerBasic</span></a>.
</p>
<p>
Other layers are optional.  Middle, or alpha, layer (set with
<a class="link" href="GwyDataView.html#gwy-data-view-set-alpha-layer" title="gwy_data_view_set_alpha_layer ()"><code class="function">gwy_data_view_set_alpha_layer()</code></a>) used to display masks is normally always
a <a class="link" href="GwyLayerMask.html" title="GwyLayerMask"><span class="type">GwyLayerMask</span></a>.  Top layer, if present, is a <a class="link" href="GwyVectorLayer.html" title="GwyVectorLayer"><span class="type">GwyVectorLayer</span></a> allowing to
draw selections with mouse and otherwise interace with the view, it is set
with <a class="link" href="GwyDataView.html#gwy-data-view-set-top-layer" title="gwy_data_view_set_top_layer ()"><code class="function">gwy_data_view_set_top_layer()</code></a>.
</p>
<p>
The size of a data view is affected by two factors: zoom and outer
constraints. If an explicit size set by window manager or by Gtk+ means, the
view scales the displayed data to fit into this size (while keeping x/y
ratio). Zoom controlls the size a data view requests, and can be set with
<a class="link" href="GwyDataView.html#gwy-data-view-set-zoom" title="gwy_data_view_set_zoom ()"><code class="function">gwy_data_view_set_zoom()</code></a>.
</p>
<p>
Several helper functions are available for transformation between screen
coordinates in the view and physical coordinates in the displayed data
field: <a class="link" href="GwyDataView.html#gwy-data-view-coords-xy-to-real" title="gwy_data_view_coords_xy_to_real ()"><code class="function">gwy_data_view_coords_xy_to_real()</code></a>, <a class="link" href="GwyDataView.html#gwy-data-view-get-xmeasure" title="gwy_data_view_get_xmeasure ()"><code class="function">gwy_data_view_get_xmeasure()</code></a>,
<a class="link" href="GwyDataView.html#gwy-data-view-get-hexcess" title="gwy_data_view_get_hexcess ()"><code class="function">gwy_data_view_get_hexcess()</code></a>, and others. Physical coordinates are always
taken from data field displayed by base layer.
</p>
</div>
<div class="refsect1">
<a name="GwyDataView.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyDataView-struct"></a><h3>struct GwyDataView</h3>
<pre class="programlisting">struct GwyDataView;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataViewClass"></a><h3>struct GwyDataViewClass</h3>
<pre class="programlisting">struct GwyDataViewClass {
    GtkWidgetClass parent_class;

    /* Signals */
    void (*redrawn)(GwyDataView *data_view);
    void (*resized)(GwyDataView *data_view);
    void (*layer_plugged)(GwyDataView *data_view,
                          GwyDataViewLayerType layer);
    void (*layer_unplugged)(GwyDataView *data_view,
                            GwyDataViewLayerType layer);

    void (*reserved1)(void);
    void (*reserved2)(void);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-new"></a><h3>gwy_data_view_new ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> *         gwy_data_view_new                   (<em class="parameter"><code><a href="../libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> *data</code></em>);</pre>
<p>
Creates a new data-displaying widget for <em class="parameter"><code>data</code></em>.
</p>
<p>
A newly created <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> doesn't display anything.  You have to add
some layers to it, at least a base layer with
<a class="link" href="GwyDataView.html#gwy-data-view-set-base-layer" title="gwy_data_view_set_base_layer ()"><code class="function">gwy_data_view_set_base_layer()</code></a>, and possibly others with
<a class="link" href="GwyDataView.html#gwy-data-view-set-alpha-layer" title="gwy_data_view_set_alpha_layer ()"><code class="function">gwy_data_view_set_alpha_layer()</code></a> and <a class="link" href="GwyDataView.html#gwy-data-view-set-top-layer" title="gwy_data_view_set_top_layer ()"><code class="function">gwy_data_view_set_top_layer()</code></a>.
</p>
<p>
The top layer is special. It must be a vector layer and can receive
mouse and keyboard events.
</p>
<p>
The base layer it also special. It must be always present, and must not be
transparent or vector.
</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>data</code></em> :</span></p></td>
<td>A <a href="../libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> containing the data to display.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly created data view as a <a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html"><span class="type">GtkWidget</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-base-layer"></a><h3>gwy_data_view_get_base_layer ()</h3>
<pre class="programlisting"><a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="returnvalue">GwyPixmapLayer</span></a> *    gwy_data_view_get_base_layer        (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns the base layer this data view currently uses.
</p>
<p>
A base layer should be always present.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The currently used base layer.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-set-base-layer"></a><h3>gwy_data_view_set_base_layer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_set_base_layer        (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="type">GwyPixmapLayer</span></a> *layer</code></em>);</pre>
<p>
Plugs <em class="parameter"><code>layer</code></em> to <em class="parameter"><code>data_view</code></em> as the base layer.
</p>
<p>
If another base layer is present, it's unplugged.
</p>
<p>
The layer must not be a vector layer.  Theoretically, it can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to
use no base layer, but then <em class="parameter"><code>data_view</code></em> will probably display garbage.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A layer to be used as the base layer for <em class="parameter"><code>data_view</code></em>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-alpha-layer"></a><h3>gwy_data_view_get_alpha_layer ()</h3>
<pre class="programlisting"><a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="returnvalue">GwyPixmapLayer</span></a> *    gwy_data_view_get_alpha_layer       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns the alpha layer this data view currently uses, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none
is present.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The currently used alpha layer.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-set-alpha-layer"></a><h3>gwy_data_view_set_alpha_layer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_set_alpha_layer       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyPixmapLayer.html" title="GwyPixmapLayer"><span class="type">GwyPixmapLayer</span></a> *layer</code></em>);</pre>
<p>
Plugs <em class="parameter"><code>layer</code></em> to <em class="parameter"><code>data_view</code></em> as the alpha layer.
</p>
<p>
If another alpha layer is present, it's unplugged.
</p>
<p>
The layer must not be a vector layer.  It can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, meaning no alpha
layer is to be used.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A layer to be used as the alpha layer for <em class="parameter"><code>data_view</code></em>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-top-layer"></a><h3>gwy_data_view_get_top_layer ()</h3>
<pre class="programlisting"><a class="link" href="GwyVectorLayer.html" title="GwyVectorLayer"><span class="returnvalue">GwyVectorLayer</span></a> *    gwy_data_view_get_top_layer         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns the top layer this data view currently uses, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none
is present.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The currently used top layer.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-set-top-layer"></a><h3>gwy_data_view_set_top_layer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_set_top_layer         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyVectorLayer.html" title="GwyVectorLayer"><span class="type">GwyVectorLayer</span></a> *layer</code></em>);</pre>
<p>
Plugs <em class="parameter"><code>layer</code></em> to <em class="parameter"><code>data_view</code></em> as the top layer.
</p>
<p>
If another top layer is present, it's unplugged.
</p>
<p>
The layer must be a vector layer.  It can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, meaning no top
layer is to be used.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A layer to be used as the top layer for <em class="parameter"><code>data_view</code></em>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-data-prefix"></a><h3>gwy_data_view_get_data_prefix ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       gwy_data_view_get_data_prefix       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Gets the prefix for the container data channel that the data view is
currently set to display.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The container data prefix (eg. "/0/data").</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-set-data-prefix"></a><h3>gwy_data_view_set_data_prefix ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_set_data_prefix       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>,
                                                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *prefix</code></em>);</pre>
<p>
Sets the prefix for the container data channel to display in a data view.
</p>
<p>
This function only affects where the data view itself takes parameters
from, it does not affect layer keys.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>prefix</code></em> :</span></p></td>
<td>Container prefix for data  (eg. "/0/data").</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-hexcess"></a><h3>gwy_data_view_get_hexcess ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_view_get_hexcess           (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Return the horizontal excess of widget size to data size.
</p>
<p>
Do not use.  Only useful for <a class="link" href="GwyDataWindow.html" title="GwyDataWindow"><span class="type">GwyDataWindow</span></a> implementation.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The execess.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-vexcess"></a><h3>gwy_data_view_get_vexcess ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_view_get_vexcess           (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Return the vertical excess of widget size to data size.
</p>
<p>
Do not use.  Only useful for <a class="link" href="GwyDataWindow.html" title="GwyDataWindow"><span class="type">GwyDataWindow</span></a> implementation.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The execess.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-set-zoom"></a><h3>gwy_data_view_set_zoom ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_set_zoom              (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> zoom</code></em>);</pre>
<p>
Sets zoom of <em class="parameter"><code>data_view</code></em> to <em class="parameter"><code>zoom</code></em>.
</p>
<p>
Zoom greater than 1 means larger image on screen and vice versa.
</p>
<p>
Note window manager can prevent the window from resize and thus the zoom
from change.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>zoom</code></em> :</span></p></td>
<td>A new zoom value.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-zoom"></a><h3>gwy_data_view_get_zoom ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_view_get_zoom              (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns current ideal zoom of a data view.
</p>
<p>
More precisely the zoom value requested by <a class="link" href="GwyDataView.html#gwy-data-view-set-zoom" title="gwy_data_view_set_zoom ()"><code class="function">gwy_data_view_set_zoom()</code></a>, if
it's in use (real zoom may differ a bit due to pixel rounding).  If zoom
was set by explicite widget size change, real and requested zoom are
considered to be the same.
</p>
<p>
When a resize is queued, the new zoom value is returned.
</p>
<p>
In other words, this is the zoom <em class="parameter"><code>data_view</code></em> would like to have.  Use
<a class="link" href="GwyDataView.html#gwy-data-view-get-real-zoom" title="gwy_data_view_get_real_zoom ()"><code class="function">gwy_data_view_get_real_zoom()</code></a> to get the real zoom.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The zoom as a ratio between ideal displayed size and base data
field size.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-real-zoom"></a><h3>gwy_data_view_get_real_zoom ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_view_get_real_zoom         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns current real zoom of a data view.
</p>
<p>
This is the zoom value a data view may not wish to have, but was imposed
by window manager or other constraints.  Unlike ideal zoom set by
<a class="link" href="GwyDataView.html#gwy-data-view-set-zoom" title="gwy_data_view_set_zoom ()"><code class="function">gwy_data_view_set_zoom()</code></a>, this value cannot be set.
</p>
<p>
When a resize is queued, the current (old) value is returned.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The zoom as a ratio between real displayed size and base data
field size.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-data"></a><h3>gwy_data_view_get_data ()</h3>
<pre class="programlisting"><a href="../libgwyddion/GwyContainer.html"><span class="returnvalue">GwyContainer</span></a> *      gwy_data_view_get_data              (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns the data container used by <em class="parameter"><code>data_view</code></em>.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The data as a <a href="../libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-coords-xy-clamp"></a><h3>gwy_data_view_coords_xy_clamp ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_coords_xy_clamp       (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xscr</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> *yscr</code></em>);</pre>
<p>
Fixes screen coordinates <em class="parameter"><code>xscr</code></em> and <em class="parameter"><code>yscr</code></em> to be inside the data-displaying
area (which can be smaller than widget size).
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xscr</code></em> :</span></p></td>
<td>A screen x-coordinate relative to widget origin.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>yscr</code></em> :</span></p></td>
<td>A screen y-coordinate relative to widget origin.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-coords-xy-cut-line"></a><h3>gwy_data_view_coords_xy_cut_line ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_coords_xy_cut_line    (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *x0scr</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> *y0scr</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> *x1scr</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> *y1scr</code></em>);</pre>
<p>
Fixes screen coordinates of line endpoints to be inside the data-displaying
area (which can be smaller than widget size).
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x0scr</code></em> :</span></p></td>
<td>First point screen x-coordinate relative to widget origin.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y0scr</code></em> :</span></p></td>
<td>First point screen y-coordinate relative to widget origin.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1scr</code></em> :</span></p></td>
<td>Second point screen x-coordinate relative to widget origin.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1scr</code></em> :</span></p></td>
<td>Second point screen y-coordinate relative to widget origin.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.11</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-coords-xy-to-real"></a><h3>gwy_data_view_coords_xy_to_real ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_coords_xy_to_real     (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> xscr</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> yscr</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> *xreal</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> *yreal</code></em>);</pre>
<p>
Recomputes screen coordinates relative to widget origin to physical
coordinates in the sample.
</p>
<p>
Note that data fields offsets are <span class="emphasis"><em>not</em></span> taken into
account.  Coordinates <em class="parameter"><code>xreal</code></em>, <em class="parameter"><code>yreal</code></em> are just relative coordinates to the
top left field corner.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xscr</code></em> :</span></p></td>
<td>A screen x-coordinate relative to widget origin.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>yscr</code></em> :</span></p></td>
<td>A screen y-coordinate relative to widget origin.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xreal</code></em> :</span></p></td>
<td>Where the physical x-coordinate in the data sample should be stored.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>yreal</code></em> :</span></p></td>
<td>Where the physical y-coordinate in the data sample should be stored.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-coords-real-to-xy"></a><h3>gwy_data_view_coords_real_to_xy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_coords_real_to_xy     (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> xreal</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> yreal</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> *xscr</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> *yscr</code></em>);</pre>
<p>
Recomputes physical coordinate in the sample to screen coordinate relative
to widget origin.
</p>
<p>
Note that data fields offsets are <span class="emphasis"><em>not</em></span> taken into
account.  Coordinates <em class="parameter"><code>xreal</code></em>, <em class="parameter"><code>yreal</code></em> are just relative coordinates to the
top left field corner.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xreal</code></em> :</span></p></td>
<td>A physical x-coordinate in the data sample.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>yreal</code></em> :</span></p></td>
<td>A physical y-coordinate in the data sample.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xscr</code></em> :</span></p></td>
<td>Where the screen x-coordinate relative to widget origin should be
stored.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>yscr</code></em> :</span></p></td>
<td>Where the screen y-coordinate relative to widget origin should be
stored.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-xmeasure"></a><h3>gwy_data_view_get_xmeasure ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_view_get_xmeasure          (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns the ratio between horizontal physical lengths and horizontal
screen lengths in pixels.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The horizontal measure.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-ymeasure"></a><h3>gwy_data_view_get_ymeasure ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_view_get_ymeasure          (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</code></em>);</pre>
<p>
Returns the ratio between vertical physical lengths and horizontal
screen lengths in pixels.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The vertical measure.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-pixel-data-sizes"></a><h3>gwy_data_view_get_pixel_data_sizes ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_get_pixel_data_sizes  (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xres</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> *yres</code></em>);</pre>
<p>
Obtains pixel dimensions of data displayed by a data view.
</p>
<p>
This is a convenience method, the same values could be obtained
by <a href="../libgwyprocess/GwyDataField.html#gwy-data-field-get-xres"><code class="function">gwy_data_field_get_xres()</code></a> and <a href="../libgwyprocess/GwyDataField.html#gwy-data-field-get-yres"><code class="function">gwy_data_field_get_yres()</code></a> of the data
field displayed by the base layer.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xres</code></em> :</span></p></td>
<td>Location to store x-resolution of displayed data (or <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"><em class="parameter"><code>yres</code></em> :</span></p></td>
<td>Location to store y-resolution of displayed data (or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-real-data-sizes"></a><h3>gwy_data_view_get_real_data_sizes ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_get_real_data_sizes   (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xreal</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> *yreal</code></em>);</pre>
<p>
Obtains physical dimensions of data displayed by a data view.
</p>
<p>
Physical coordinates are always taken from data field displayed by the base
layer.  This is a convenience method, the same values could be obtained
by <a href="../libgwyprocess/GwyDataField.html#gwy-data-field-get-xreal"><code class="function">gwy_data_field_get_xreal()</code></a> and <a href="../libgwyprocess/GwyDataField.html#gwy-data-field-get-yreal"><code class="function">gwy_data_field_get_yreal()</code></a> of the data
field displayed by the base layer.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xreal</code></em> :</span></p></td>
<td>Location to store physical x-dimension of the displayed data
without excess (or <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"><em class="parameter"><code>yreal</code></em> :</span></p></td>
<td>Location to store physical y-dimension of the displayed data
without excess (or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-real-data-offsets"></a><h3>gwy_data_view_get_real_data_offsets ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_get_real_data_offsets (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *xoffset</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> *yoffset</code></em>);</pre>
<p>
Obtains physical offsets of data displayed by a data view.
</p>
<p>
Physical coordinates are always taken from data field displayed by the base
layer.  This is a convenience method, the same values could be obtained
by <a href="../libgwyprocess/GwyDataField.html#gwy-data-field-get-xoffset"><code class="function">gwy_data_field_get_xoffset()</code></a> and <a href="../libgwyprocess/GwyDataField.html#gwy-data-field-get-yoffset"><code class="function">gwy_data_field_get_yoffset()</code></a> of the data
field displayed by the base layer.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xoffset</code></em> :</span></p></td>
<td>Location to store physical x-offset of the top corner of
displayed data without excess (or <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"><em class="parameter"><code>yoffset</code></em> :</span></p></td>
<td>Location to store physical y-offset of the top corner of
displayed data without excess (or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>).</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-metric"></a><h3>gwy_data_view_get_metric ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_view_get_metric            (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> *metric</code></em>);</pre>
<p>
Fills metric matrix for a data view.
</p>
<p>
The metric matrix essentially transforms distances in physical coordinates
to screen distances.  It is to be used with functions like
<a href="../libgwyddion/libgwyddion-Math.html#gwy-math-find-nearest-point"><code class="function">gwy_math_find_nearest_point()</code></a> and <a href="../libgwyddion/libgwyddion-Math.html#gwy-math-find-nearest-line"><code class="function">gwy_math_find_nearest_line()</code></a> when the
distance should be screen-Euclidean.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>metric</code></em> :</span></p></td>
<td>Metric matrix 2x2 (stored in sequentially by rows: m11, m12, m12,
m22).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-get-pixbuf"></a><h3>gwy_data_view_get_pixbuf ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="returnvalue">GdkPixbuf</span></a> *         gwy_data_view_get_pixbuf            (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> max_width</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> max_height</code></em>);</pre>
<p>
Creates and returns a pixbuf from the data view.
</p>
<p>
If the data is not square, the resulting pixbuf is also nonsquare.
The returned pixbuf also never has an alpha channel.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>max_width</code></em> :</span></p></td>
<td>Pixbuf width that should not be exceeeded.  Value smaller than
1 means unlimited size.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>max_height</code></em> :</span></p></td>
<td>Pixbuf height that should not be exceeeded.  Value smaller than
1 means unlimited size.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The pixbuf as a newly created <a href="/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="type">GdkPixbuf</span></a>, it should be freed
when no longer needed.  It is never larger than the actual data
size, as <em class="parameter"><code>max_width</code></em> and <em class="parameter"><code>max_height</code></em> are only upper limits.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-view-export-pixbuf"></a><h3>gwy_data_view_export_pixbuf ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gdk-pixbuf/gdk-pixbuf-The-GdkPixbuf-Structure.html#GdkPixbuf"><span class="returnvalue">GdkPixbuf</span></a> *         gwy_data_view_export_pixbuf         (<em class="parameter"><code><a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *data_view</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> zoom</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> draw_alpha</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> draw_top</code></em>);</pre>
<p>
Exports data view to a pixbuf.
</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>data_view</code></em> :</span></p></td>
<td>A data view.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>zoom</code></em> :</span></p></td>
<td>Zoom to export data with (unrelated to data view zoom).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>draw_alpha</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> to draw alpha layer (mask).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>draw_top</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> to draw top layer (selection).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly created pixbuf, it must be freed by caller.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GwyDataView.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GwyDataView--data-prefix"></a><h3>The <code class="literal">"data-prefix"</code> property</h3>
<pre class="programlisting">  "data-prefix"              <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Read / Write</pre>
<p>
The :data-prefix property is the container prefix the data displayed
by this view lies under.
</p>
<p>
Note it is only used for items used by <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> itself, layers have
their own keys.
</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataView--zoom"></a><h3>The <code class="literal">"zoom"</code> property</h3>
<pre class="programlisting">  "zoom"                     <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>
The :zoom property is the ratio between displayed and real data size.
</p>
<p>Allowed values: [0.0625,16]</p>
<p>Default value: 1</p>
</div>
</div>
<div class="refsect1">
<a name="GwyDataView.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GwyDataView-layer-plugged"></a><h3>The <code class="literal">"layer-plugged"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>         *arg1,
                                                        <a class="link" href="libgwydgets-gwydgetenums.html#GwyDataViewLayerType" title="enum GwyDataViewLayerType"><span class="type">GwyDataViewLayerType</span></a> gwydataview,
                                                        <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 ::layer-plugged signal is emitted when a layer is plugged into
a <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>.
</p>
<p>
When a layer replaces an existing layer, ::layer-unplugged is emitted
once the old layer is unplugged, then ::layer-plugged when the new
is plugged.
</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>arg1</code></em> :</span></p></td>
<td>Which layer was plugged (a <a class="link" href="libgwydgets-gwydgetenums.html#GwyDataViewLayerType" title="enum GwyDataViewLayerType"><span class="type">GwyDataViewLayerType</span></a> value).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwydataview</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataView-layer-unplugged"></a><h3>The <code class="literal">"layer-unplugged"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>         *arg1,
                                                        <a class="link" href="libgwydgets-gwydgetenums.html#GwyDataViewLayerType" title="enum GwyDataViewLayerType"><span class="type">GwyDataViewLayerType</span></a> gwydataview,
                                                        <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 ::layer-unplugged signal is emitted when a layer is unplugged from
a <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a>.
</p>
<p>
When a layer replaces an existing layer, ::layer-unplugged is emitted
once the old layer is unplugged, then ::layer-plugged when the new
is plugged.
</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>arg1</code></em> :</span></p></td>
<td>Which layer was unplugged (a <a class="link" href="libgwydgets-gwydgetenums.html#GwyDataViewLayerType" title="enum GwyDataViewLayerType"><span class="type">GwyDataViewLayerType</span></a> value).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwydataview</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataView-redrawn"></a><h3>The <code class="literal">"redrawn"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *gwydataview,
                                                        <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 ::redrawn signal is emitted when <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> redraws pixbufs after
an update.  That is, when it's the right time to get a new pixbuf from
<a class="link" href="GwyDataView.html#gwy-data-view-get-pixbuf" title="gwy_data_view_get_pixbuf ()"><code class="function">gwy_data_view_get_pixbuf()</code></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwydataview</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataView-resized"></a><h3>The <code class="literal">"resized"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> *gwydataview,
                                                        <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 ::resized signal is emitted when <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</span></a> wants to be resized,
that is when the dimensions of base data field changes or square mode
is changed.
Its purpose is to subvert the normal resizing logic of <a class="link" href="GwyDataWindow.html" title="GwyDataWindow"><span class="type">GwyDataWindow</span></a>
(due to geometry hints, its size requests are generally ignored, so
an explicit resize is needed).  You should usually ignore it.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwydataview</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataView.html" title="GwyDataView"><span class="type">GwyDataView</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="GwyDataView.see-also"></a><h2>See Also</h2>
<a class="link" href="GwyDataWindow.html" title="GwyDataWindow"><span class="type">GwyDataWindow</span></a> -- window combining data view with other controls,
           <a class="link" href="GwyDataViewLayer.html" title="GwyDataViewLayer"><span class="type">GwyDataViewLayer</span></a> -- layers a data view is composed of,
           <a href="../libgwydraw/libgwydraw-gwypixfield.html">gwypixfield</a> --
           low level functions for painting data fields,
           <a class="link" href="Gwy3DView.html" title="Gwy3DView"><span class="type">Gwy3DView</span></a> -- OpenGL 3D data display
</div>
</div>
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