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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>gtkmm 2.4: Gdk::Visual Class Reference</title>
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<a class="el" href="namespaceGdk.html">Gdk</a>::<a class="el" href="classGdk_1_1Visual.html">Visual</a></div>
<h1>Gdk::Visual Class Reference</h1><!-- doxytag: class="Gdk::Visual" --><!-- doxytag: inherits="Glib::Object" -->Inheritance diagram for Gdk::Visual:<p><center><img src="classGdk_1_1Visual__inherit__graph.png" border="0" usemap="#Gdk_1_1Visual__inherit__map" alt="Inheritance graph"></center>
<map name="Gdk_1_1Visual__inherit__map">
<area doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1Object.html" shape="rect" coords="21,161,115,188" alt="">
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<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="classGdk_1_1Visual-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
A <a class="el" href="classGdk_1_1Visual.html">Gdk::Visual</a> describes a particular video hardware display format.
<p>
It includes information about the number of bits used for each color, the way the bits are translated into an RGB value for display, and the way the bits are stored in memory. For example, a piece of display hardware might support 24-bit color, 16-bit color, or 8-bit color; meaning 24/16/8-bit pixel sizes. For a given pixel size, pixels can be in different formats; for example the "red" element of an RGB pixel may be in the top 8 bits of the pixel, or may be in the lower 4 bits.<p>
Usually you can avoid thinking about visuals in GTK+. Visuals are useful to interpret the contents of a GdkImage, but you should avoid <a class="el" href="classGdk_1_1Image.html">Gdk::Image</a> precisely because its contents depend on the display hardware; use <a class="el" href="classGdk_1_1Pixbuf.html">Gdk::Pixbuf</a> instead, for all but the most low-level purposes. Also, anytime you provide a <a class="el" href="classGdk_1_1Colormap.html">Gdk::Colormap</a>, the visual is implied as part of the colormap (<a class="el" href="classGdk_1_1Colormap.html#90d5e438d78992e2030832a196ac222b">Gdk::Colormap::get_visual()</a>), so you won't have to provide a visual in addition.<p>
There are several standard visuals. The visual returned by <a class="el" href="classGdk_1_1Visual.html#4724a117dabcb795c406fea0172e3d08">get_system()</a> is the system's default visual. get_visual() returns the visual most suited to displaying full-color image data. If you use the calls in Gdk::RGB, you should create your windows using this visual (and the colormap returned by Gdk::Rgb::get_colormap()).<p>
A number of methods are provided for determining the "best" available visual. For the purposes of making this determination, higher bit depths are considered better, and for visuals of the same bit depth, GDK_VISUAL_PSEUDO_COLOR is preferred at 8bpp, otherwise, the visual types are ranked in the order of (highest to lowest) GDK_VISUAL_DIRECT_COLOR, GDK_VISUAL_TRUE_COLOR, GDK_VISUAL_PSEUDO_COLOR, GDK_VISUAL_STATIC_COLOR, GDK_VISUAL_GRAYSCALE, then GDK_VISUAL_STATIC_GRAY.
<p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><const <a class="el" href="classGdk_1_1Screen.html">Screen</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#7aae4ebbb49de2e3bb5f4d36cdeb7259">get_screen</a> () const</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Gets the screen to which this visual belongs. <a href="#7aae4ebbb49de2e3bb5f4d36cdeb7259"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Screen.html">Screen</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#7e10f47bbec94749bf683969e52927a5">get_screen</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Gets the screen to which this visual belongs. <a href="#7e10f47bbec94749bf683969e52927a5"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const GdkVisual* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#5a87c6999237ccdccca903955d45acb8">gobj</a> () const</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C GObject. <a href="#5a87c6999237ccdccca903955d45acb8"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">GdkVisual* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#23e5a76ba206f65d763186a9161b1f00">gobj</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C GObject. <a href="#23e5a76ba206f65d763186a9161b1f00"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">GdkVisual* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#ac860c63e6f3740145653aef122bdf11">gobj_copy</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. <a href="#ac860c63e6f3740145653aef122bdf11"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#3e1b56ed29c8c6b4a9b54a4bc14a64a8">~Visual</a> ()</td></tr>
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#a58e64d37a98afc31f4a09412b558863">get_best</a> (int depth, <a class="el" href="group__gdkmmEnums.html#gf51d8a92358be17e8bdcbe2a229d1620">VisualType</a> visual_type)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Combines gdk_visual_get_best_with_depth() and gdk_visual_get_best_with_type(). <a href="#a58e64d37a98afc31f4a09412b558863"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#23a87ca05f0ff38962c341fad1698239">get_best</a> (<a class="el" href="group__gdkmmEnums.html#gf51d8a92358be17e8bdcbe2a229d1620">VisualType</a> visual_type)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the best visual of the given <em>visual_type</em> for the default GDK screen. <a href="#23a87ca05f0ff38962c341fad1698239"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#2f44b4029c4b3091f567903f6991e88a">get_best</a> (int depth)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the best visual with depth <em>depth</em> for the default GDK screen. <a href="#2f44b4029c4b3091f567903f6991e88a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#8d67541c7ac1cca24b20f1e04a654c9e">get_best</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the visual with the most available colors for the default GDK screen. <a href="#8d67541c7ac1cca24b20f1e04a654c9e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#4033654c987ba7208b7f1ab8e53c04a2">get_best_depth</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the best available depth for the default GDK screen. <a href="#4033654c987ba7208b7f1ab8e53c04a2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="group__gdkmmEnums.html#gf51d8a92358be17e8bdcbe2a229d1620">VisualType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#9653abce581c94fca4dca322ffb4e16d">get_best_type</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the best available visual type for the default GDK screen. <a href="#9653abce581c94fca4dca322ffb4e16d"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#4724a117dabcb795c406fea0172e3d08">get_system</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the system'sdefault visual for the default GDK screen. <a href="#4724a117dabcb795c406fea0172e3d08"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#04412275c902225a6bd103d0a5f3ad2e">Visual</a> ()</td></tr>
<tr><td colspan="2"><br><h2>Related Functions</h2></td></tr>
<tr><td colspan="2">(Note that these are not member functions.) <br><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Gdk::Visual</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Visual.html#151170bd9f613ba53f811871166a6f55">wrap</a> (GdkVisual* object, bool take_copy=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">A <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/namespaceGlib.html#671306f4a3a0cae5ab4d7a9d54886592">Glib::wrap()</a> method for this object. <a href="#151170bd9f613ba53f811871166a6f55"></a><br></td></tr>
</table>
<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="3e1b56ed29c8c6b4a9b54a4bc14a64a8"></a><!-- doxytag: member="Gdk::Visual::~Visual" ref="3e1b56ed29c8c6b4a9b54a4bc14a64a8" args="()" -->
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<td class="memname">virtual Gdk::Visual::~Visual </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
</div>
</div><p>
<a class="anchor" name="04412275c902225a6bd103d0a5f3ad2e"></a><!-- doxytag: member="Gdk::Visual::Visual" ref="04412275c902225a6bd103d0a5f3ad2e" args="()" -->
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<td class="memname">Gdk::Visual::Visual </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [protected]</code></td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a58e64d37a98afc31f4a09412b558863"></a><!-- doxytag: member="Gdk::Visual::get_best" ref="a58e64d37a98afc31f4a09412b558863" args="(int depth, VisualType visual_type)" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Visual::get_best </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>depth</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__gdkmmEnums.html#gf51d8a92358be17e8bdcbe2a229d1620">VisualType</a> </td>
<td class="paramname"> <em>visual_type</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"><code> [static]</code></td>
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<p>
Combines gdk_visual_get_best_with_depth() and gdk_visual_get_best_with_type().
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>depth</em> </td><td>A bit depth. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>visual_type</em> </td><td>A visual type. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Best visual with both <em>depth</em> and <em>visual_type</em> , or <code>0</code> if none. </dd></dl>
</div>
</div><p>
<a class="anchor" name="23a87ca05f0ff38962c341fad1698239"></a><!-- doxytag: member="Gdk::Visual::get_best" ref="23a87ca05f0ff38962c341fad1698239" args="(VisualType visual_type)" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Visual::get_best </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__gdkmmEnums.html#gf51d8a92358be17e8bdcbe2a229d1620">VisualType</a> </td>
<td class="paramname"> <em>visual_type</em> </td>
<td> ) </td>
<td width="100%"><code> [static]</code></td>
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<p>
Get the best visual of the given <em>visual_type</em> for the default GDK screen.
<p>
Visuals with higher color depths are considered better. The return value should not be freed. <code>0</code> may be returned if no visual has type <em>visual_type</em> . <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>visual_type</em> </td><td>A visual type. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Best visual of the given type. </dd></dl>
</div>
</div><p>
<a class="anchor" name="2f44b4029c4b3091f567903f6991e88a"></a><!-- doxytag: member="Gdk::Visual::get_best" ref="2f44b4029c4b3091f567903f6991e88a" args="(int depth)" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Visual::get_best </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>depth</em> </td>
<td> ) </td>
<td width="100%"><code> [static]</code></td>
</tr>
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<p>
Get the best visual with depth <em>depth</em> for the default GDK screen.
<p>
<a class="el" href="classGdk_1_1Color.html">Color</a> visuals and visuals with mutable colormaps are preferred over grayscale or fixed-colormap visuals. The return value should not be freed. <code>0</code> may be returned if no visual supports <em>depth</em> . <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>depth</em> </td><td>A bit depth. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Best visual for the given depth. </dd></dl>
</div>
</div><p>
<a class="anchor" name="8d67541c7ac1cca24b20f1e04a654c9e"></a><!-- doxytag: member="Gdk::Visual::get_best" ref="8d67541c7ac1cca24b20f1e04a654c9e" args="()" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Visual::get_best </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [static]</code></td>
</tr>
</table>
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<p>
Get the visual with the most available colors for the default GDK screen.
<p>
The return value should not be freed. <dl class="return" compact><dt><b>Returns:</b></dt><dd>Best visual. </dd></dl>
</div>
</div><p>
<a class="anchor" name="4033654c987ba7208b7f1ab8e53c04a2"></a><!-- doxytag: member="Gdk::Visual::get_best_depth" ref="4033654c987ba7208b7f1ab8e53c04a2" args="()" -->
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<td class="memname">static int Gdk::Visual::get_best_depth </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Get the best available depth for the default GDK screen.
<p>
"Best" means "largest," i.e. 32 preferred over 24 preferred over 8 bits per pixel. <dl class="return" compact><dt><b>Returns:</b></dt><dd>Best available depth. </dd></dl>
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<a class="anchor" name="9653abce581c94fca4dca322ffb4e16d"></a><!-- doxytag: member="Gdk::Visual::get_best_type" ref="9653abce581c94fca4dca322ffb4e16d" args="()" -->
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<td class="memname">static <a class="el" href="group__gdkmmEnums.html#gf51d8a92358be17e8bdcbe2a229d1620">VisualType</a> Gdk::Visual::get_best_type </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Return the best available visual type for the default GDK screen.
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Best visual type. </dd></dl>
</div>
</div><p>
<a class="anchor" name="7aae4ebbb49de2e3bb5f4d36cdeb7259"></a><!-- doxytag: member="Gdk::Visual::get_screen" ref="7aae4ebbb49de2e3bb5f4d36cdeb7259" args="() const" -->
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<td class="memname"><a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><const <a class="el" href="classGdk_1_1Screen.html">Screen</a>> Gdk::Visual::get_screen </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"> const</td>
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<p>
Gets the screen to which this visual belongs.
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>The screen to which this visual belongs.</dd></dl>
<dl compact><dt><b><a class="el" href="newin2p2s.html#_newin2p2s000087">Since gtkmm 2.2:</a></b></dt><dd></dd></dl>
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</div><p>
<a class="anchor" name="7e10f47bbec94749bf683969e52927a5"></a><!-- doxytag: member="Gdk::Visual::get_screen" ref="7e10f47bbec94749bf683969e52927a5" args="()" -->
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<td class="memname"><a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Screen.html">Screen</a>> Gdk::Visual::get_screen </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Gets the screen to which this visual belongs.
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>The screen to which this visual belongs.</dd></dl>
<dl compact><dt><b><a class="el" href="newin2p2s.html#_newin2p2s000086">Since gtkmm 2.2:</a></b></dt><dd></dd></dl>
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</div><p>
<a class="anchor" name="4724a117dabcb795c406fea0172e3d08"></a><!-- doxytag: member="Gdk::Visual::get_system" ref="4724a117dabcb795c406fea0172e3d08" args="()" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Visual::get_system </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [static]</code></td>
</tr>
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<div class="memdoc">
<p>
Get the system'sdefault visual for the default GDK screen.
<p>
This is the visual for the root window of the display. The return value should not be freed. <dl class="return" compact><dt><b>Returns:</b></dt><dd>System visual. </dd></dl>
</div>
</div><p>
<a class="anchor" name="5a87c6999237ccdccca903955d45acb8"></a><!-- doxytag: member="Gdk::Visual::gobj" ref="5a87c6999237ccdccca903955d45acb8" args="() const" -->
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<td class="memname">const GdkVisual* Gdk::Visual::gobj </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"> const<code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Provides access to the underlying C GObject.
<p>
<p>
Reimplemented from <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1ObjectBase.html#2b7010748d60e770e9e0b3d65c100cf2">Glib::ObjectBase</a>.
</div>
</div><p>
<a class="anchor" name="23e5a76ba206f65d763186a9161b1f00"></a><!-- doxytag: member="Gdk::Visual::gobj" ref="23e5a76ba206f65d763186a9161b1f00" args="()" -->
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<td class="memname">GdkVisual* Gdk::Visual::gobj </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Provides access to the underlying C GObject.
<p>
<p>
Reimplemented from <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1ObjectBase.html#4c6efc18be8cb9c56e58fc0bd20fafbe">Glib::ObjectBase</a>.
</div>
</div><p>
<a class="anchor" name="ac860c63e6f3740145653aef122bdf11"></a><!-- doxytag: member="Gdk::Visual::gobj_copy" ref="ac860c63e6f3740145653aef122bdf11" args="()" -->
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<td class="memname">GdkVisual* Gdk::Visual::gobj_copy </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td width="100%"></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
<p>
</div>
</div><p>
<hr><h2>Friends And Related Function Documentation</h2>
<a class="anchor" name="151170bd9f613ba53f811871166a6f55"></a><!-- doxytag: member="Gdk::Visual::wrap" ref="151170bd9f613ba53f811871166a6f55" args="(GdkVisual *object, bool take_copy=false)" -->
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<td class="memname"><a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Gdk::Visual</a>> wrap </td>
<td>(</td>
<td class="paramtype">GdkVisual * </td>
<td class="paramname"> <em>object</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>take_copy</em> = <code>false</code></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"><code> [related]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
A <a class="elRef" doxygen="glibmm_doxygen_tags:../../../../glibmm-2.4/docs/reference/html/" href="../../../../glibmm-2.4/docs/reference/html/namespaceGlib.html#671306f4a3a0cae5ab4d7a9d54886592">Glib::wrap()</a> method for this object.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>object</em> </td><td>The C instance. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>take_copy</em> </td><td>False if the result should take ownership of the C instance. True if it should take a new copy or ref. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>A C++ instance that wraps this C instance. </dd></dl>
</div>
</div><p>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="visual_8h.html">visual.h</a></ul>
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