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<div class="navpath"><a class="el" href="namespaceGdk.html">Gdk</a>::<a class="el" href="classGdk_1_1Colormap.html">Colormap</a>
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<h1>Gdk::Colormap Class Reference</h1><!-- doxytag: class="Gdk::Colormap" --><!-- doxytag: inherits="Glib::Object" -->
<p>A <a class="el" href="classGdk_1_1Colormap.html" title="A Colormap is an object that contains the mapping between the color values stored...">Colormap</a> is an object that contains the mapping between the color values stored in memory and the RGB values that are used to display color values. <a href="#_details">More...</a></p>
<p>Inherits <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1Object.html">Glib::Object</a>.</p>
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Collaboration diagram for Gdk::Colormap:</div>
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<area shape="rect" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1Object.html" title="Glib::Object" alt="" coords="20,160,111,189"/><area shape="rect" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ObjectBase.html" title="Glib::ObjectBase" alt="" coords="5,83,125,112"/><area shape="rect" doxygen="libsigc++-2.0.tag:http://library.gnome.org/devel/libsigc++/unstable/" href="http://library.gnome.org/devel/libsigc++/unstable/structsigc_1_1trackable.html" title="sigc::trackable" alt="" coords="12,5,119,35"/></map>
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<p><a href="classGdk_1_1Colormap-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a527fe5eab97c19bb3d1fcedb933ecd13">~Colormap</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">GdkColormap* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a8e073a91f54ca4f7443db9e1d514bb52">gobj</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C GObject. <a href="#a8e073a91f54ca4f7443db9e1d514bb52"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const GdkColormap* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a5120e898c1cb3dfa9135d1548024da5d">gobj</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Provides access to the underlying C GObject. <a href="#a5120e898c1cb3dfa9135d1548024da5d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">GdkColormap* </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a8bc022fb6ea4673159155bca8e730a39">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="#a8bc022fb6ea4673159155bca8e730a39"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a572fe8fade77afbdcc7f7cf56ff489f6">alloc_colors</a> (<a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ArrayHandle.html">ArrayHandle_Color</a>& colors, int ncolors, bool writeable, bool best_match, <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ArrayHandle.html">Glib::ArrayHandle</a>< bool >& success)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a79d4fec03cb95c71b64d4a0bc6282fe6">free_colors</a> (<a class="el" href="classGdk_1_1Color.html">Color</a>& colors, int ncolors)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a798a90a164bd95a865360b573455407c">alloc_color</a> (<a class="el" href="classGdk_1_1Color.html">Color</a>& color, bool writeable=false, bool best_match=true)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Allocates a single color from a colormap. <a href="#a798a90a164bd95a865360b573455407c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#aabb71a757b4f69a90d0fca884a6b4c62">free_color</a> (<a class="el" href="classGdk_1_1Color.html">Color</a>& color)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#ac3c3335c6f0ceab1ab75d3f9bd25f53f">query_color</a> (gulong pixel, <a class="el" href="classGdk_1_1Color.html">Color</a>& result)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Locates the RGB color in <em>colormap</em> corresponding to the given hardware pixel <em>pixel</em>. <a href="#ac3c3335c6f0ceab1ab75d3f9bd25f53f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/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_1Colormap.html#a90d5e438d78992e2030832a196ac222b">get_visual</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the visual for which a given colormap was created. <a href="#a90d5e438d78992e2030832a196ac222b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< const <a class="el" href="classGdk_1_1Visual.html">Visual</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a0056f8871c2da5e8c72a9a272de21c5c">get_visual</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the visual for which a given colormap was created. <a href="#a0056f8871c2da5e8c72a9a272de21c5c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/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_1Colormap.html#a0de4faa551cfccf109947e9af4dee7ff">get_screen</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Gets the screen for which this colormap was created. <a href="#a0de4faa551cfccf109947e9af4dee7ff"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/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_1Colormap.html#a98526be53c38ac403790dcb2a8db55db">get_screen</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Gets the screen for which this colormap was created. <a href="#a98526be53c38ac403790dcb2a8db55db"></a><br/></td></tr>
<tr><td colspan="2"><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Colormap.html">Colormap</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a9447b914e4f6d73ff2d041350791ade1">create</a> (const <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Visual.html">Visual</a> >& visual, bool allocate)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Colormap.html">Colormap</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a78c9dfeafac5833684299e8b1b5ce016">get_system</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Gets the system's default colormap for the default screen. <a href="#a78c9dfeafac5833684299e8b1b5ce016"></a><br/></td></tr>
<tr><td colspan="2"><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#ab617d305ec0582e6a762ed97016dac09">Colormap</a> (const <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Visual.html">Visual</a> >& visual, bool allocate)</td></tr>
<tr><td colspan="2"><h2>Related Functions</h2></td></tr>
<tr><td colspan="2"><p>(Note that these are not member functions.) </p>
<br/><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Colormap.html">Gdk::Colormap</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classGdk_1_1Colormap.html#a73e55bc63cbc380d36c3d382a47be80a">wrap</a> (GdkColormap* object, bool take_copy=false)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">A <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/namespaceGlib.html#a671306f4a3a0cae5ab4d7a9d54886592">Glib::wrap()</a> method for this object. <a href="#a73e55bc63cbc380d36c3d382a47be80a"></a><br/></td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>A <a class="el" href="classGdk_1_1Colormap.html" title="A Colormap is an object that contains the mapping between the color values stored...">Colormap</a> is an object that contains the mapping between the color values stored in memory and the RGB values that are used to display color values. </p>
<p>In general, colormaps only contain significant information for pseudo-color visuals, but even for other visual types, a colormap object is required in some circumstances.</p>
<p>There are a couple of special colormaps that can be retrieved. The system colormap (retrieved with <a class="el" href="classGdk_1_1Colormap.html#a78c9dfeafac5833684299e8b1b5ce016" title="Gets the system's default colormap for the default screen.">get_system()</a>) is the default colormap of the system. If you are using GdkRGB, there is another colormap that is important - the colormap in which GdkRGB works, retrieved with <a class="el" href="namespaceGdk.html#a37e62b12aa3ddf44b4f69e05d8893b5a" title="Get the preferred colormap for rendering image data.">Gdk::rgb_get_colormap()</a>. However, when using GdkRGB, it is not generally necessary to allocate colors directly. </p>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a527fe5eab97c19bb3d1fcedb933ecd13"></a><!-- doxytag: member="Gdk::Colormap::~Colormap" ref="a527fe5eab97c19bb3d1fcedb933ecd13" args="()" -->
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<td class="memname">virtual Gdk::Colormap::~Colormap </td>
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<td> ) </td>
<td><code> [virtual]</code></td>
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<a class="anchor" id="ab617d305ec0582e6a762ed97016dac09"></a><!-- doxytag: member="Gdk::Colormap::Colormap" ref="ab617d305ec0582e6a762ed97016dac09" args="(const Glib::RefPtr< Visual > &visual, bool allocate)" -->
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<td class="memname">Gdk::Colormap::Colormap </td>
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<td class="paramtype">const <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Visual.html">Visual</a> >& </td>
<td class="paramname"> <em>visual</em>, </td>
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<td class="paramname"> <em>allocate</em></td><td> </td>
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<td></td><td></td><td><code> [explicit, protected]</code></td>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a798a90a164bd95a865360b573455407c"></a><!-- doxytag: member="Gdk::Colormap::alloc_color" ref="a798a90a164bd95a865360b573455407c" args="(Color &color, bool writeable=false, bool best_match=true)" -->
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<td class="memname">bool Gdk::Colormap::alloc_color </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGdk_1_1Color.html">Color</a>& </td>
<td class="paramname"> <em>color</em>, </td>
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<td class="paramname"> <em>writeable</em> = <code>false</code>, </td>
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<td class="paramname"> <em>best_match</em> = <code>true</code></td><td> </td>
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<p>Allocates a single color from a colormap. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>color</em> </td><td>The color to allocate. On return the <structfield>pixel</structfield> field will be filled in if allocation succeeds. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>writeable</em> </td><td>If <code>true</code>, the color is allocated writeable (their values can later be changed using gdk_color_change()). Writeable colors cannot be shared between applications. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>best_match</em> </td><td>If <code>true</code>, GDK will attempt to do matching against existing colors if the color cannot be allocated as requested. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if the allocation succeeded. </dd></dl>
</div>
</div>
<a class="anchor" id="a572fe8fade77afbdcc7f7cf56ff489f6"></a><!-- doxytag: member="Gdk::Colormap::alloc_colors" ref="a572fe8fade77afbdcc7f7cf56ff489f6" args="(ArrayHandle_Color &colors, int ncolors, bool writeable, bool best_match, Glib::ArrayHandle< bool > &success)" -->
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<td class="memname">int Gdk::Colormap::alloc_colors </td>
<td>(</td>
<td class="paramtype"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ArrayHandle.html">ArrayHandle_Color</a> & </td>
<td class="paramname"> <em>colors</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>ncolors</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>writeable</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>best_match</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ArrayHandle.html">Glib::ArrayHandle</a>< bool > & </td>
<td class="paramname"> <em>success</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td></td>
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<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000002">Deprecated:</a></b></dt><dd>Use <a class="el" href="classGdk_1_1Colormap.html#a798a90a164bd95a865360b573455407c" title="Allocates a single color from a colormap.">alloc_color()</a>. </dd></dl>
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<a class="anchor" id="a9447b914e4f6d73ff2d041350791ade1"></a><!-- doxytag: member="Gdk::Colormap::create" ref="a9447b914e4f6d73ff2d041350791ade1" args="(const Glib::RefPtr< Visual > &visual, bool allocate)" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Colormap.html">Colormap</a>> Gdk::Colormap::create </td>
<td>(</td>
<td class="paramtype">const <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Visual.html">Visual</a> >& </td>
<td class="paramname"> <em>visual</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>allocate</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [static]</code></td>
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<a class="anchor" id="aabb71a757b4f69a90d0fca884a6b4c62"></a><!-- doxytag: member="Gdk::Colormap::free_color" ref="aabb71a757b4f69a90d0fca884a6b4c62" args="(Color &color)" -->
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<td class="memname">void Gdk::Colormap::free_color </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGdk_1_1Color.html">Color</a>& </td>
<td class="paramname"> <em>color</em></td>
<td> ) </td>
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<a class="anchor" id="a79d4fec03cb95c71b64d4a0bc6282fe6"></a><!-- doxytag: member="Gdk::Colormap::free_colors" ref="a79d4fec03cb95c71b64d4a0bc6282fe6" args="(Color &colors, int ncolors)" -->
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<td class="memname">void Gdk::Colormap::free_colors </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classGdk_1_1Color.html">Color</a>& </td>
<td class="paramname"> <em>colors</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>ncolors</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000003">Deprecated:</a></b></dt><dd>Use <a class="el" href="classGdk_1_1Colormap.html#aabb71a757b4f69a90d0fca884a6b4c62">free_color()</a> </dd></dl>
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<a class="anchor" id="a98526be53c38ac403790dcb2a8db55db"></a><!-- doxytag: member="Gdk::Colormap::get_screen" ref="a98526be53c38ac403790dcb2a8db55db" args="() const " -->
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<td class="memname"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a><const <a class="el" href="classGdk_1_1Screen.html">Screen</a>> Gdk::Colormap::get_screen </td>
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<td> const</td>
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<p>Gets the screen for which this colormap was created. </p>
<dl class="since_2_2"><dt><b><a class="el" href="since_2_2.html#_since_2_2000002">Since gtkmm 2.2:</a></b></dt><dd></dd></dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The screen for which this colormap was created. </dd></dl>
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<a class="anchor" id="a0de4faa551cfccf109947e9af4dee7ff"></a><!-- doxytag: member="Gdk::Colormap::get_screen" ref="a0de4faa551cfccf109947e9af4dee7ff" args="()" -->
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<td class="memname"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Screen.html">Screen</a>> Gdk::Colormap::get_screen </td>
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<p>Gets the screen for which this colormap was created. </p>
<dl class="since_2_2"><dt><b><a class="el" href="since_2_2.html#_since_2_2000001">Since gtkmm 2.2:</a></b></dt><dd></dd></dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The screen for which this colormap was created. </dd></dl>
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<a class="anchor" id="a78c9dfeafac5833684299e8b1b5ce016"></a><!-- doxytag: member="Gdk::Colormap::get_system" ref="a78c9dfeafac5833684299e8b1b5ce016" args="()" -->
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<td class="memname">static <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Colormap.html">Colormap</a>> Gdk::Colormap::get_system </td>
<td>(</td>
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<td><code> [static]</code></td>
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<p>Gets the system's default colormap for the default screen. </p>
<p>(See gdk_colormap_get_system_for_screen()) </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>The default colormap. </dd></dl>
</div>
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<a class="anchor" id="a0056f8871c2da5e8c72a9a272de21c5c"></a><!-- doxytag: member="Gdk::Colormap::get_visual" ref="a0056f8871c2da5e8c72a9a272de21c5c" args="() const " -->
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<td class="memname"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a><const <a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Colormap::get_visual </td>
<td>(</td>
<td class="paramname"></td>
<td> ) </td>
<td> const</td>
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<p>Returns the visual for which a given colormap was created. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>The visual of the colormap. </dd></dl>
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<a class="anchor" id="a90d5e438d78992e2030832a196ac222b"></a><!-- doxytag: member="Gdk::Colormap::get_visual" ref="a90d5e438d78992e2030832a196ac222b" args="()" -->
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<td class="memname"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a><<a class="el" href="classGdk_1_1Visual.html">Visual</a>> Gdk::Colormap::get_visual </td>
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<p>Returns the visual for which a given colormap was created. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>The visual of the colormap. </dd></dl>
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<a class="anchor" id="a5120e898c1cb3dfa9135d1548024da5d"></a><!-- doxytag: member="Gdk::Colormap::gobj" ref="a5120e898c1cb3dfa9135d1548024da5d" args="() const " -->
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<td class="memname">const GdkColormap* Gdk::Colormap::gobj </td>
<td>(</td>
<td class="paramname"></td>
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<td> const<code> [inline]</code></td>
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<p>Provides access to the underlying C GObject. </p>
<p>Reimplemented from <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ObjectBase.html#a778a94181132976bbfb0519793f3b32e">Glib::ObjectBase</a>.</p>
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<a class="anchor" id="a8e073a91f54ca4f7443db9e1d514bb52"></a><!-- doxytag: member="Gdk::Colormap::gobj" ref="a8e073a91f54ca4f7443db9e1d514bb52" args="()" -->
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<td class="memname">GdkColormap* Gdk::Colormap::gobj </td>
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<td><code> [inline]</code></td>
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<p>Provides access to the underlying C GObject. </p>
<p>Reimplemented from <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1ObjectBase.html#a4c6efc18be8cb9c56e58fc0bd20fafbe">Glib::ObjectBase</a>.</p>
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<a class="anchor" id="a8bc022fb6ea4673159155bca8e730a39"></a><!-- doxytag: member="Gdk::Colormap::gobj_copy" ref="a8bc022fb6ea4673159155bca8e730a39" args="()" -->
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<td class="memname">GdkColormap* Gdk::Colormap::gobj_copy </td>
<td>(</td>
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<td> ) </td>
<td></td>
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<p>Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. </p>
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<a class="anchor" id="ac3c3335c6f0ceab1ab75d3f9bd25f53f"></a><!-- doxytag: member="Gdk::Colormap::query_color" ref="ac3c3335c6f0ceab1ab75d3f9bd25f53f" args="(gulong pixel, Color &result)" -->
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<td class="memname">void Gdk::Colormap::query_color </td>
<td>(</td>
<td class="paramtype">gulong </td>
<td class="paramname"> <em>pixel</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classGdk_1_1Color.html">Color</a>& </td>
<td class="paramname"> <em>result</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>Locates the RGB color in <em>colormap</em> corresponding to the given hardware pixel <em>pixel</em>. </p>
<p><em>pixel</em> must be a valid pixel in the colormap; it's a programmer error to call this function with a pixel which is not in the colormap. Hardware pixels are normally obtained from <a class="el" href="classGdk_1_1Colormap.html#a572fe8fade77afbdcc7f7cf56ff489f6">alloc_colors()</a>, or from a <a class="el" href="classGdk_1_1Image.html" title="This represents an area for drawing graphics.">Gdk::Image</a>. (A <a class="el" href="classGdk_1_1Image.html" title="This represents an area for drawing graphics.">Gdk::Image</a> contains image data in hardware format, a <a class="el" href="classGdk_1_1Pixbuf.html">Gdk::Pixbuf</a> contains image data in a canonical 24-bit RGB format.)</p>
<p>This function is rarely useful; it's used for example to implement the eyedropper feature in <a class="el" href="classGtk_1_1ColorSelection.html" title="A widget used to select a color.">Gtk::ColorSelection</a>. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pixel</em> </td><td>Pixel value in hardware display format. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>result</em> </td><td><a class="el" href="classGdk_1_1Color.html" title="Gdk::Color is used to describe an allocated or unallocated color.">Gdk::Color</a> with red, green, blue fields initialized. </td></tr>
</table>
</dd>
</dl>
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</div>
<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="a73e55bc63cbc380d36c3d382a47be80a"></a><!-- doxytag: member="Gdk::Colormap::wrap" ref="a73e55bc63cbc380d36c3d382a47be80a" args="(GdkColormap *object, bool take_copy=false)" -->
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<td class="memname"><a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1RefPtr.html">Glib::RefPtr</a>< <a class="el" href="classGdk_1_1Colormap.html">Gdk::Colormap</a> > wrap </td>
<td>(</td>
<td class="paramtype">GdkColormap * </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>
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<td>)</td>
<td></td><td></td><td><code> [related]</code></td>
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<p>A <a class="elRef" doxygen="glibmm-2.4.tag:http://library.gnome.org/devel/glibmm/unstable/" href="http://library.gnome.org/devel/glibmm/unstable/namespaceGlib.html#a671306f4a3a0cae5ab4d7a9d54886592">Glib::wrap()</a> method for this object. </p>
<dl><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>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>A C++ instance that wraps this C instance. </dd></dl>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>gdkmm/colormap.h</li>
</ul>
</div>
<hr size="1"/><address style="text-align: right;"><small>Generated on Tue May 4 13:21:43 2010 for gtkmm by 
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