gdkscreen.html

最新gtk中文资料集

<p>
Gets the default screen for the default display. (See
<a class="link" href="GdkDisplay.html#gdk-display-get-default"><code class="function">gdk_display_get_default()</code></a>).</p>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>, or <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> if there is no default display.

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<p class="since">Since  2.2
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<div class="refsect2" lang="en">
<a name="id3067247"></a><h3>
<a name="gdk-screen-get-default-colormap"></a>gdk_screen_get_default_colormap ()</h3>
<a class="indexterm" name="id3067263"></a><pre class="programlisting"><a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a>*        gdk_screen_get_default_colormap     (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Gets the default colormap for <em class="parameter"><code>screen</code></em>.</p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the default <a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a>.

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<p class="since">Since  2.2
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<div class="refsect2" lang="en">
<a name="id3067351"></a><h3>
<a name="gdk-screen-set-default-colormap"></a>gdk_screen_set_default_colormap ()</h3>
<a class="indexterm" name="id3067367"></a><pre class="programlisting">void                gdk_screen_set_default_colormap     (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen,
                                                         <a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a> *colormap);</pre>
<p>
Sets the default <em class="parameter"><code>colormap</code></em> for <em class="parameter"><code>screen</code></em>.</p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>colormap</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since  2.2
</p>
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<div class="refsect2" lang="en">
<a name="id3067472"></a><h3>
<a name="gdk-screen-get-system-colormap"></a>gdk_screen_get_system_colormap ()</h3>
<a class="indexterm" name="id3067488"></a><pre class="programlisting"><a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a>*        gdk_screen_get_system_colormap      (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Gets the system's default colormap for <em class="parameter"><code>screen</code></em></p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>
</td>
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<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the default colormap for <em class="parameter"><code>screen</code></em>.

</td>
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<p class="since">Since  2.2
</p>
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<div class="refsect2" lang="en">
<a name="id3067574"></a><h3>
<a name="gdk-screen-get-system-visual"></a>gdk_screen_get_system_visual ()</h3>
<a class="indexterm" name="id3067590"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_screen_get_system_visual        (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Get the system's default visual for <em class="parameter"><code>screen</code></em>.
This is the visual for the root window of the display.
The return value should not be freed.</p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>.
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the system visual

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<p class="since">Since  2.2
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<div class="refsect2" lang="en">
<a name="id3067672"></a><h3>
<a name="gdk-screen-get-rgb-colormap"></a>gdk_screen_get_rgb_colormap ()</h3>
<a class="indexterm" name="id3067688"></a><pre class="programlisting"><a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a>*        gdk_screen_get_rgb_colormap         (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Gets the preferred colormap for rendering image data on <em class="parameter"><code>screen</code></em>.
Not a very useful function; historically, GDK could only render RGB
image data to one colormap and visual, but in the current version
it can render to any colormap and visual. So there's no need to
call this function.</p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>.
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the preferred colormap

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<p class="since">Since  2.2
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<div class="refsect2" lang="en">
<a name="id3067773"></a><h3>
<a name="gdk-screen-get-rgb-visual"></a>gdk_screen_get_rgb_visual ()</h3>
<a class="indexterm" name="id3067788"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_screen_get_rgb_visual           (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Gets a "preferred visual" chosen by GdkRGB for rendering image data
on <em class="parameter"><code>screen</code></em>. In previous versions of
GDK, this was the only visual GdkRGB could use for rendering. In
current versions, it's simply the visual GdkRGB would have chosen as 
the optimal one in those previous versions. GdkRGB can now render to 
drawables with any visual.</p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>
</td>
</tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> The <a class="link" href="gdk-Visuals.html#GdkVisual"><span class="type">GdkVisual</span></a> chosen by GdkRGB.

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<p class="since">Since  2.2
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<div class="refsect2" lang="en">
<a name="id3067882"></a><h3>
<a name="gdk-screen-get-rgba-colormap"></a>gdk_screen_get_rgba_colormap ()</h3>
<a class="indexterm" name="id3067897"></a><pre class="programlisting"><a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a>*        gdk_screen_get_rgba_colormap        (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Gets a colormap to use for creating windows or pixmaps with an
alpha channel. The windowing system on which GTK+ is running
may not support this capability, in which case <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> will
be returned. Even if a non-<a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> value is returned, its
possible that the window's alpha channel won't be honored
when displaying the window on the screen: in particular, for
X an appropriate windowing manager and compositing manager
must be running to provide appropriate display.
</p>
<p>
This functionality is not implemented in the Windows backend.
</p>
<p>
For setting an overall opacity for a top-level window, see
<a class="link" href="gdk-Windows.html#gdk-window-set-opacity"><code class="function">gdk_window_set_opacity()</code></a>.</p>
<p>

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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>.
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> a colormap to use for windows with an alpha channel
  or <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> if the capability is not available.

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<p class="since">Since  2.8
</p>
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<div class="refsect2" lang="en">
<a name="id3068032"></a><h3>
<a name="gdk-screen-get-rgba-visual"></a>gdk_screen_get_rgba_visual ()</h3>
<a class="indexterm" name="id3068048"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_screen_get_rgba_visual          (<a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a> *screen);</pre>
<p>
Gets a visual to use for creating windows or pixmaps with an
alpha channel. See the docs for <a class="link" href="GdkScreen.html#gdk-screen-get-rgba-colormap"><code class="function">gdk_screen_get_rgba_colormap()</code></a>
for caveats.</p>
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<td><p><span class="term"><em class="parameter"><code>screen</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GdkScreen.html" title="GdkScreen"><span class="type">GdkScreen</span></a>
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> a visual to use for windows with an alpha channel
  or <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> if the capability is not available.

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<p class="since">Since  2.8
</p>
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