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<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QX11Info Class</h1>
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<p>Provides information about the X display configuration. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QX11Info></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += x11extras</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.1</td></tr></table></div><ul>
<li><a href="qx11info-members.html">List of all members, including inherited members</a></li>
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<h2 id="static-public-members">Static Public Members</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#appDpiX">appDpiX</a></b>(int<i> screen</i> = -1)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#appDpiY">appDpiY</a></b>(int<i> screen</i> = -1)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> unsigned long </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#appRootWindow">appRootWindow</a></b>(int<i> screen</i> = -1)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#appScreen">appScreen</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> unsigned long </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#appTime">appTime</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> unsigned long </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#appUserTime">appUserTime</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> xcb_connection_t * </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#connection">connection</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Display * </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#display">display</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> unsigned long </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#getTimestamp">getTimestamp</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#isPlatformX11">isPlatformX11</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QByteArray </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#nextStartupId">nextStartupId</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#setAppTime">setAppTime</a></b>(unsigned long<i> time</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#setAppUserTime">setAppUserTime</a></b>(unsigned long<i> time</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qx11info.html#setNextStartupId">setNextStartupId</a></b>(const QByteArray &<i> id</i>)</td></tr>
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<h2 id="details">Detailed Description</h2>
<p>Provides information about the X display configuration.</p>
<p>The class provides two APIs: a set of non-static functions that provide information about a specific widget or pixmap, and a set of static functions that provide the default information for the application.</p>
<p><b>Warning:</b> This class is only available on X11. For querying per-screen information in a portable way, use <a href="../qtwidgets/qdesktopwidget.html">QDesktopWidget</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="appDpiX"><a name="appDpiX"></a><code>[static] </code><span class="type">int</span> QX11Info::<span class="name">appDpiX</span>(<span class="type">int</span><i> screen</i> = -1)</h3>
<p>Returns the horizontal resolution of the given <i>screen</i> in terms of the number of dots per inch.</p>
<p>The <i>screen</i> argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use <a href="../qtwidgets/qdesktopwidget.html">QDesktopWidget</a> to query for information about Xinerama screens.</p>
<p><b>See also </b><a href="qx11info.html#appDpiY">appDpiY</a>().</p>
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<h3 class="fn" id="appDpiY"><a name="appDpiY"></a><code>[static] </code><span class="type">int</span> QX11Info::<span class="name">appDpiY</span>(<span class="type">int</span><i> screen</i> = -1)</h3>
<p>Returns the vertical resolution of the given <i>screen</i> in terms of the number of dots per inch.</p>
<p>The <i>screen</i> argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use <a href="../qtwidgets/qdesktopwidget.html">QDesktopWidget</a> to query for information about Xinerama screens.</p>
<p><b>See also </b><a href="qx11info.html#appDpiX">appDpiX</a>().</p>
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<h3 class="fn" id="appRootWindow"><a name="appRootWindow"></a><code>[static] </code><span class="type">unsigned</span> <span class="type">long</span> QX11Info::<span class="name">appRootWindow</span>(<span class="type">int</span><i> screen</i> = -1)</h3>
<p>Returns a handle for the applications root window on the given <i>screen</i>.</p>
<p>The <i>screen</i> argument is an X screen number. Be aware that if the user's system uses Xinerama (as opposed to traditional X11 multiscreen), there is only one X screen. Use <a href="../qtwidgets/qdesktopwidget.html">QDesktopWidget</a> to query for information about Xinerama screens.</p>
<p><b>See also </b><a href="../qtwidgets/qapplication.html#desktop">QApplication::desktop</a>().</p>
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<h3 class="fn" id="appScreen"><a name="appScreen"></a><code>[static] </code><span class="type">int</span> QX11Info::<span class="name">appScreen</span>()</h3>
<p>Returns the number of the screen where the application is being displayed.</p>
<p>This method refers to screens in the original X11 meaning with a different DISPLAY environment variable per screen. This information is only useful if your application needs to know on which X screen it is running.</p>
<p>In a typical multi-head configuration, multiple physical monitors are combined in one X11 screen. This means this method returns the same number for each of the physical monitors. In such a setup you are interested in the monitor information as provided by the X11 RandR extension. This is available through <a href="../qtwidgets/qdesktopwidget.html">QDesktopWidget</a> and QScreen.</p>
<p><b>See also </b><a href="qx11info.html#display">display</a>().</p>
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<h3 class="fn" id="appTime"><a name="appTime"></a><code>[static] </code><span class="type">unsigned</span> <span class="type">long</span> QX11Info::<span class="name">appTime</span>()</h3>
<p>Returns the X11 time.</p>
<p><b>See also </b><a href="qx11info.html#setAppTime">setAppTime</a>() and <a href="qx11info.html#appUserTime">appUserTime</a>().</p>
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<h3 class="fn" id="appUserTime"><a name="appUserTime"></a><code>[static] </code><span class="type">unsigned</span> <span class="type">long</span> QX11Info::<span class="name">appUserTime</span>()</h3>
<p>Returns the X11 user time.</p>
<p><b>See also </b><a href="qx11info.html#setAppUserTime">setAppUserTime</a>() and <a href="qx11info.html#appTime">appTime</a>().</p>
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<h3 class="fn" id="connection"><a name="connection"></a><code>[static] </code><span class="type">xcb_connection_t</span> * QX11Info::<span class="name">connection</span>()</h3>
<p>Returns the default XCB connection for the application.</p>
<p><b>See also </b><a href="qx11info.html#display">display</a>().</p>
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<h3 class="fn" id="display"><a name="display"></a><code>[static] </code><span class="type">Display</span> * QX11Info::<span class="name">display</span>()</h3>
<p>Returns the default display for the application.</p>
<p><b>See also </b><a href="qx11info.html#appScreen">appScreen</a>().</p>
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<h3 class="fn" id="getTimestamp"><a name="getTimestamp"></a><code>[static] </code><span class="type">unsigned</span> <span class="type">long</span> QX11Info::<span class="name">getTimestamp</span>()</h3>
<p>Fetches the current X11 time stamp from the X Server.</p>
<p>This method creates a property notify event and blocks till it is received back from the X Server.</p>
<p>This function was introduced in Qt 5.2.</p>
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<h3 class="fn" id="isPlatformX11"><a name="isPlatformX11"></a><code>[static] </code><span class="type">bool</span> QX11Info::<span class="name">isPlatformX11</span>()</h3>
<p>Returns true if the application is currently running on X11.</p>
<p>This function was introduced in Qt 5.2.</p>
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<h3 class="fn" id="nextStartupId"><a name="nextStartupId"></a><code>[static] </code><span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> QX11Info::<span class="name">nextStartupId</span>()</h3>
<p>Returns the startup ID that will be used for the next window to be shown by this process.</p>
<p>After the next window is shown, the next startup ID will be empty.</p>
<p>http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt</p>
<p>This function was introduced in Qt 5.4.</p>
<p><b>See also </b><a href="qx11info.html#setNextStartupId">setNextStartupId</a>().</p>
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<h3 class="fn" id="setAppTime"><a name="setAppTime"></a><code>[static] </code><span class="type">void</span> QX11Info::<span class="name">setAppTime</span>(<span class="type">unsigned</span> <span class="type">long</span><i> time</i>)</h3>
<p>Sets the X11 time to the value specified by <i>time</i>.</p>
<p><b>See also </b><a href="qx11info.html#appTime">appTime</a>() and <a href="qx11info.html#setAppUserTime">setAppUserTime</a>().</p>
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<h3 class="fn" id="setAppUserTime"><a name="setAppUserTime"></a><code>[static] </code><span class="type">void</span> QX11Info::<span class="name">setAppUserTime</span>(<span class="type">unsigned</span> <span class="type">long</span><i> time</i>)</h3>
<p>Sets the X11 user time as specified by <i>time</i>.</p>
<p><b>See also </b><a href="qx11info.html#appUserTime">appUserTime</a>() and <a href="qx11info.html#setAppTime">setAppTime</a>().</p>
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<h3 class="fn" id="setNextStartupId"><a name="setNextStartupId"></a><code>[static] </code><span class="type">void</span> QX11Info::<span class="name">setNextStartupId</span>(const <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> &<i> id</i>)</h3>
<p>Sets the next startup ID to <i>id</i>.</p>
<p>This is the startup ID that will be used for the next window to be shown by this process.</p>
<p>The startup ID of the first window comes from the environment variable DESKTOP_STARTUP_ID. This method is useful for subsequent windows, when the request comes from another process (e.g. via DBus).</p>
<p>This function was introduced in Qt 5.4.</p>
<p><b>See also </b><a href="qx11info.html#nextStartupId">nextStartupId</a>().</p>
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