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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<th width="100%" align="center">Gwyddion Widgets Library Reference Manual</th>
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<tr><td colspan="5" class="shortcuts">
<a href="#GwyRuler.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#GwyRuler.description" class="shortcut">Description</a>
                   | 
                  <a href="#GwyRuler.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#GwyRuler.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
                   | 
                  <a href="#GwyRuler.properties" class="shortcut">Properties</a>
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<div class="refentry">
<a name="GwyRuler"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GwyRuler.top_of_page"></a>GwyRuler</span></h2>
<p>GwyRuler — Base class for <a class="link" href="GwyHRuler.html" title="GwyHRuler"><span class="type">GwyHRuler</span></a> and <a class="link" href="GwyVRuler.html" title="GwyVRuler"><span class="type">GwyVRuler</span></a></p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GwyRuler.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;libgwydgets/gwydgets.h&gt;

struct              <a class="link" href="GwyRuler.html#GwyRuler-struct" title="struct GwyRuler">GwyRuler</a>;
struct              <a class="link" href="GwyRuler.html#GwyRulerClass" title="struct GwyRulerClass">GwyRulerClass</a>;
<span class="returnvalue">void</span>                <a class="link" href="GwyRuler.html#gwy-ruler-draw-pos" title="gwy_ruler_draw_pos ()">gwy_ruler_draw_pos</a>                  (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyRuler.html#gwy-ruler-get-range" title="gwy_ruler_get_range ()">gwy_ruler_get_range</a>                 (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</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> *lower</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> *upper</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> *position</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *max_size</code></em>);
<a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="returnvalue">GwySIUnit</span></a> *         <a class="link" href="GwyRuler.html#gwy-ruler-get-si-unit" title="gwy_ruler_get_si_unit ()">gwy_ruler_get_si_unit</a>               (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>);
<a class="link" href="libgwydgets-gwydgetenums.html#GwyUnitsPlacement" title="enum GwyUnitsPlacement"><span class="returnvalue">GwyUnitsPlacement</span></a>   <a class="link" href="GwyRuler.html#gwy-ruler-get-units-placement" title="gwy_ruler_get_units_placement ()">gwy_ruler_get_units_placement</a>       (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyRuler.html#gwy-ruler-set-range" title="gwy_ruler_set_range ()">gwy_ruler_set_range</a>                 (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</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> lower</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> upper</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> position</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> max_size</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyRuler.html#gwy-ruler-set-si-unit" title="gwy_ruler_set_si_unit ()">gwy_ruler_set_si_unit</a>               (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> *units</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyRuler.html#gwy-ruler-set-units-placement" title="gwy_ruler_set_units_placement ()">gwy_ruler_set_units_placement</a>       (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwydgets-gwydgetenums.html#GwyUnitsPlacement" title="enum GwyUnitsPlacement"><span class="type">GwyUnitsPlacement</span></a> placement</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyRuler.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----<a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
         +----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkObject.html">GtkObject</a>
               +----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html">GtkWidget</a>
                     +----GwyRuler
                           +----<a class="link" href="GwyHRuler.html" title="GwyHRuler">GwyHRuler</a>
                           +----<a class="link" href="GwyVRuler.html" title="GwyVRuler">GwyVRuler</a>
</pre>
</div>
<div class="refsect1">
<a name="GwyRuler.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwyRuler implements
 AtkImplementorIface and  <a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkBuildable.html">GtkBuildable</a>.</p>
</div>
<div class="refsect1">
<a name="GwyRuler.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="GwyRuler.html#GwyRuler--lower" title='The "lower" property'>lower</a>"                    <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write
  "<a class="link" href="GwyRuler.html#GwyRuler--max-size" title='The "max-size" property'>max-size</a>"                 <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write
  "<a class="link" href="GwyRuler.html#GwyRuler--position" title='The "position" property'>position</a>"                 <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write
  "<a class="link" href="GwyRuler.html#GwyRuler--units-placement" title='The "units-placement" property'>units-placement</a>"          <a class="link" href="libgwydgets-gwydgetenums.html#GwyUnitsPlacement" title="enum GwyUnitsPlacement"><span class="type">GwyUnitsPlacement</span></a>     : Read / Write
  "<a class="link" href="GwyRuler.html#GwyRuler--upper" title='The "upper" property'>upper</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="GwyRuler.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> is a ruler similar to <a href="/usr/share/gtk-doc/html/gtk/GtkRuler.html"><span class="type">GtkRuler</span></a>, but it is more suited for a
scientific application.  It is scale-independent and thus has no arbitrary
limits on the ranges or interpretation of displayed values.  It can display
units on the ruler (this can be controlled with
<a class="link" href="GwyRuler.html#gwy-ruler-set-units-placement" title="gwy_ruler_set_units_placement ()"><code class="function">gwy_ruler_set_units_placement()</code></a>) and cooperates with <a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> (see
<a class="link" href="GwyRuler.html#gwy-ruler-set-si-unit" title="gwy_ruler_set_si_unit ()"><code class="function">gwy_ruler_set_si_unit()</code></a>).  It also better follows Gtk+ theme than <a href="/usr/share/gtk-doc/html/gtk/GtkRuler.html"><span class="type">GtkRuler</span></a>.
</p>
</div>
<div class="refsect1">
<a name="GwyRuler.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyRuler-struct"></a><h3>struct GwyRuler</h3>
<pre class="programlisting">struct GwyRuler;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyRulerClass"></a><h3>struct GwyRulerClass</h3>
<pre class="programlisting">struct GwyRulerClass {
    GtkWidgetClass parent_class;

    /* Virtual methods */
    void (*prepare_sizes) (GwyRuler *ruler);
    void (*draw_frame) (GwyRuler *ruler);
    void (*draw_layout) (GwyRuler *ruler,
                         gint hpos,
                         gint vpos);
    void (*draw_tick) (GwyRuler *ruler,
                       gint pos,
                       gint length);
    void (*draw_pos)   (GwyRuler *ruler);

    void (*reserved1)(void);
    void (*reserved2)(void);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-ruler-draw-pos"></a><h3>gwy_ruler_draw_pos ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_ruler_draw_pos                  (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>);</pre>
<p>
Draws a position marker.
</p>
<p>
This method is intended primarily for subclass implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-ruler-get-range"></a><h3>gwy_ruler_get_range ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_ruler_get_range                 (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</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> *lower</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> *upper</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> *position</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *max_size</code></em>);</pre>
<p>
Retrieves values indicating the range and current position of a <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>.
See <a class="link" href="GwyRuler.html#gwy-ruler-set-range" title="gwy_ruler_set_range ()"><code class="function">gwy_ruler_set_range()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>lower</code></em> :</span></p></td>
<td>Location to store lower limit of the ruler, 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>upper</code></em> :</span></p></td>
<td>Location to store upper limit of the ruler, 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>position</code></em> :</span></p></td>
<td>Location to store the current position of the mark on the ruler,
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>max_size</code></em> :</span></p></td>
<td>Location to store the maximum size of the ruler used when
calculating the space to leave for the text, 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-ruler-get-si-unit"></a><h3>gwy_ruler_get_si_unit ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="returnvalue">GwySIUnit</span></a> *         gwy_ruler_get_si_unit               (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>);</pre>
<p>
Returns the base units a ruler uses.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The units the rules uses.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-ruler-get-units-placement"></a><h3>gwy_ruler_get_units_placement ()</h3>
<pre class="programlisting"><a class="link" href="libgwydgets-gwydgetenums.html#GwyUnitsPlacement" title="enum GwyUnitsPlacement"><span class="returnvalue">GwyUnitsPlacement</span></a>   gwy_ruler_get_units_placement       (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>);</pre>
<p>
Gets current units placement of ruler <em class="parameter"><code>ruler</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The units placement.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-ruler-set-range"></a><h3>gwy_ruler_set_range ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_ruler_set_range                 (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</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> lower</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> upper</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> position</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> max_size</code></em>);</pre>
<p>
Sets range and current value of a ruler.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>lower</code></em> :</span></p></td>
<td>Lower limit of the ruler.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>upper</code></em> :</span></p></td>
<td>Upper limit of the ruler.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>position</code></em> :</span></p></td>
<td>Current position of the mark on the ruler.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>max_size</code></em> :</span></p></td>
<td>Maximum value used for calculating size of text labels.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-ruler-set-si-unit"></a><h3>gwy_ruler_set_si_unit ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_ruler_set_si_unit               (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> *units</code></em>);</pre>
<p>
Sets the base units a ruler displays.
</p>
<p>
Setting units to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> effectively disables them.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>units</code></em> :</span></p></td>
<td>The base units this ruler should display.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-ruler-set-units-placement"></a><h3>gwy_ruler_set_units_placement ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_ruler_set_units_placement       (<em class="parameter"><code><a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a> *ruler</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwydgets-gwydgetenums.html#GwyUnitsPlacement" title="enum GwyUnitsPlacement"><span class="type">GwyUnitsPlacement</span></a> placement</code></em>);</pre>
<p>
Sets whether and where units should be placed on the ruler.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ruler</code></em> :</span></p></td>
<td>A <a class="link" href="GwyRuler.html" title="GwyRuler"><span class="type">GwyRuler</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>placement</code></em> :</span></p></td>
<td>Units placement specification.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GwyRuler.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GwyRuler--lower"></a><h3>The <code class="literal">"lower"</code> property</h3>
<pre class="programlisting">  "lower"                    <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>Lower limit of ruler.</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyRuler--max-size"></a><h3>The <code class="literal">"max-size"</code> property</h3>
<pre class="programlisting">  "max-size"                 <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>Maximum size of the ruler.</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyRuler--position"></a><h3>The <code class="literal">"position"</code> property</h3>
<pre class="programlisting">  "position"                 <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>Position of mark on the ruler.</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyRuler--units-placement"></a><h3>The <code class="literal">"units-placement"</code> property</h3>
<pre class="programlisting">  "units-placement"          <a class="link" href="libgwydgets-gwydgetenums.html#GwyUnitsPlacement" title="enum GwyUnitsPlacement"><span class="type">GwyUnitsPlacement</span></a>     : Read / Write</pre>
<p>The placement of units on the ruler, if any.</p>
<p>Default value: GWY_UNITS_PLACEMENT_NONE</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyRuler--upper"></a><h3>The <code class="literal">"upper"</code> property</h3>
<pre class="programlisting">  "upper"                    <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>               : Read / Write</pre>
<p>Upper limit of ruler.</p>
<p>Default value: 0</p>
</div>
</div>
</div>
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