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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<!-- dforeignwindow.cpp -->
<title>DForeignWindow Class | Dtk Reference Documentation 1.0.0</title>
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<div class="header" id="qtdocheader">
<div class="main">
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<div class="navigationbar">
<ul>
<li><a href="index.html">Dtk Doc</a></li>
<li><a href="index.html">Dtk Reference Documentation</a></li>
<li>DForeignWindow</li>
<li id="buildversion"><a href="index.html">Qt 5.15.2 Reference Documentation</a></li>
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<div class="content">
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#static-public-members">Static Public Members</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">DForeignWindow Class</h1>
<span class="small-subtitle">class <a href="dtk.html">Dtk</a>::<a href="dtk-gui.html">Gui</a>::DForeignWindow</span>
<!-- $$$DForeignWindow-brief -->
<p>一个用于获取本地窗口信息的类. <a href="#details">More...</a></p>
<!-- @@@DForeignWindow -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <DForeignWindow></span>
</td></tr></table></div><ul>
<li><a href="dtk-gui-dforeignwindow-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><a href="dtk-gui-dforeignwindow.html#pid-prop">pid</a></b> : const quint32</li>
<li class="fn"><b><a href="dtk-gui-dforeignwindow.html#wmClass-prop">wmClass</a></b> : const QString</li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="dtk-gui-dforeignwindow.html#DForeignWindow">DForeignWindow</a></b>(QWindow *<i>parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> quint32 </td><td class="memItemRight bottomAlign"><b><a href="dtk-gui-dforeignwindow.html#pid-prop">pid</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="dtk-gui-dforeignwindow.html#wmClass-prop">wmClass</a></b>() const</td></tr>
</table></div>
<a name="signals"></a>
<h2 id="signals">Signals</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="dtk-gui-dforeignwindow.html#pidChanged">pidChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="dtk-gui-dforeignwindow.html#wmClassChanged">wmClassChanged</a></b>()</td></tr>
</table></div>
<a name="static-public-members"></a>
<h2 id="static-public-members">Static Public Members</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Dtk::Gui::DForeignWindow *</td><td class="memItemRight bottomAlign"><b><a href="dtk-gui-dforeignwindow.html#fromWinId">fromWinId</a></b>(int <i>id</i>)</td></tr>
</table></div>
<a name="details"></a>
<!-- $$$DForeignWindow-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>继承于 <a href="http://doc.qt.io/qt-5/qwindow.html">QWindow</a>，支持 <a href="http://doc.qt.io/qt-5/qwindow.html#geometry">QWindow::geometry</a> <a href="http://doc.qt.io/qt-5/qwindow.html#x-prop">QWindow::x</a> <a href="http://doc.qt.io/qt-5/qwindow.html#y-prop">QWindow::y</a> <a href="http://doc.qt.io/qt-5/qwindow.html#width-prop">QWindow::width</a> <a href="http://doc.qt.io/qt-5/qwindow.html#height-prop">QWindow::height</a> <a href="http://doc.qt.io/qt-5/qwindow.html#title-prop">QWindow::title</a> <a href="http://doc.qt.io/qt-5/qwindow.html#flags-prop">QWindow::flags</a> <a href="http://doc.qt.io/qt-5/qwindow.html#visibility-prop">QWindow::visibility</a> <a href="http://doc.qt.io/qt-5/qwindow.html#type">QWindow::type</a> <a href="http://doc.qt.io/qt-5/qwindow.html#windowStates">QWindow::windowStates</a> <a href="http://doc.qt.io/qt-5/qwindow.html#windowState">QWindow::windowState</a> 等接口的使用，另外扩展 增加了一部分接口，方面更加详细的获取窗口信息。依赖于 dxcb 插件，在未加载 dxcb 插件的应用中使用时结果未知</p>
</div>
<p><b>See also </b><a href="dtk-gui-dwindowmanagerhelper.html#currentWorkspaceWindows">DWindowManagerHelper::currentWorkspaceWindows</a>, Dtk::Widget::DApplication::loadDXcbPlugin, and Dtk::Widget::DApplication::isDXcbPlatform.</p>
<!-- @@@DForeignWindow -->
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$pid-prop$$$pid$$$pidChanged -->
<h3 class="fn" id="pid-prop"><a name="pid-prop"></a><span class="name">pid</span> : const <span class="type"><a href="http://doc.qt.io/qt-5/qtglobal.html#quint32-typedef">quint32</a></span></h3>
<p>窗口所属进程的 pid</p>
<p><b>Note: </b>只读 <a href="https://specifications.freedesktop.org/wm-spec/1.3/ar01s05.html">_NET_WM_PID</a></p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> quint32 </td><td class="memItemRight bottomAlign"><span class="name"><b>pid</b></span>() const</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="dtk-gui-dforeignwindow.html#pidChanged">pidChanged</a></b></span>()</td></tr>
</table></div>
<!-- @@@pid -->
<!-- $$$wmClass-prop$$$wmClass$$$wmClassChanged -->
<h3 class="fn" id="wmClass-prop"><a name="wmClass-prop"></a><span class="name">wmClass</span> : const <span class="type"><a href="http://doc.qt.io/qt-5/qstring.html">QString</a></span></h3>
<p>窗口 WM_CLASS 的值</p>
<p><b>Note: </b>只读 <a href="https://tronche.com/gui/x/icccm/sec-4.html#WM_CLASS">WM_CLASS</a></p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QString </td><td class="memItemRight bottomAlign"><span class="name"><b>wmClass</b></span>() const</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="dtk-gui-dforeignwindow.html#wmClassChanged">wmClassChanged</a></b></span>()</td></tr>
</table></div>
<!-- @@@wmClass -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$DForeignWindow[overload1]$$$DForeignWindowQWindow* -->
<h3 class="fn" id="DForeignWindow"><a name="DForeignWindow"></a>DForeignWindow::<span class="name">DForeignWindow</span>(<span class="type"><a href="http://doc.qt.io/qt-5/qwindow.html">QWindow</a></span> *<i>parent</i> = 0)</h3>
<p>直接构造一个 DForeignWindow 对象和使用 <a href="http://doc.qt.io/qt-5/qwindow.html">QWindow</a> 对象没有区别.</p>
<p><i>parent</i></p>
<p><b>See also </b><a href="dtk-gui-dforeignwindow.html#fromWinId">DForeignWindow::fromWinId</a>.</p>
<!-- @@@DForeignWindow -->
<!-- $$$pidChanged -->
<h3 class="fn" id="pidChanged"><a name="pidChanged"></a><code>[signal] </code><span class="type">void</span> DForeignWindow::<span class="name">pidChanged</span>()</h3>
<p>信号会在 pid 属性的值改变时被发送.</p>
<p><b>Note: </b>Notifier signal for property <a href="dtk-gui-dforeignwindow.html#pid-prop">pid</a>. </p>
<p><b>See also </b><a href="dtk-gui-dforeignwindow.html#pid-prop">DForeignWindow::pid</a>.</p>
<!-- @@@pidChanged -->
<!-- $$$wmClassChanged -->
<h3 class="fn" id="wmClassChanged"><a name="wmClassChanged"></a><code>[signal] </code><span class="type">void</span> DForeignWindow::<span class="name">wmClassChanged</span>()</h3>
<p>信号会在 <a href="dtk-gui-dforeignwindow.html#wmClass-prop">wmClass</a> 属性改变时被发送.</p>
<p><b>Note: </b>Notifier signal for property <a href="dtk-gui-dforeignwindow.html#wmClass-prop">wmClass</a>. </p>
<p><b>See also </b><a href="dtk-gui-dforeignwindow.html#wmClass-prop">DForeignWindow::wmClass</a>.</p>
<!-- @@@wmClassChanged -->
<!-- $$$fromWinId[overload1]$$$fromWinIdint -->
<h3 class="fn" id="fromWinId"><a name="fromWinId"></a><code>[static] </code><span class="type"><a href="dtk-gui-dforeignwindow.html">Dtk::Gui::DForeignWindow</a></span> *DForeignWindow::<span class="name">fromWinId</span>(<span class="type">int</span> <i>id</i>)</h3>
<p>DForeignWindow::fromWinId. 使用这个窗口id创建一个 <a href="dtk-gui-dforeignwindow.html">DForeignWindow</a> 对象，此对象不会被加到 <a href="http://doc.qt.io/qt-5/qguiapplication.html#allWindows">QGuiApplication::allWindows</a> 中。一般应用在需要获取一个本地窗口信息的场景。示例：</p>
<pre class="cpp">
<span class="comment">// a.cpp</span>
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
DApplication a(argc<span class="operator">,</span> argv);
<span class="type"><a href="http://doc.qt.io/qt-5/qwidget.html">QWidget</a></span> w;
w<span class="operator">.</span>setWindowTitle(<span class="string">"deepin"</span>);
w<span class="operator">.</span>show();
<span class="type"><a href="http://doc.qt.io/qt-5/qfile.html">QFile</a></span> app_win_id(<span class="string">"/tmp/window_id.txt"</span>);
<span class="keyword">if</span> (app_win_id<span class="operator">.</span>open(<span class="type"><a href="http://doc.qt.io/qt-5/qfile.html">QFile</a></span><span class="operator">::</span>WriteOnly)) {
app_win_id<span class="operator">.</span>write(<span class="type"><a href="http://doc.qt.io/qt-5/qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(w<span class="operator">.</span>winId()));
app_win_id<span class="operator">.</span>close();
}
<span class="keyword">return</span> a<span class="operator">.</span>exec();
}
</pre>
<pre class="cpp">
<span class="comment">// b.cpp</span>
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
DApplication<span class="operator">::</span>loadDXcbPlugin();
DApplication a(argc<span class="operator">,</span> argv);
DForeignWindow <span class="operator">*</span>fw <span class="operator">=</span> nullptr;
<span class="type"><a href="http://doc.qt.io/qt-5/qfile.html">QFile</a></span> app_win_id(<span class="string">"/tmp/window_id.txt"</span>);
<span class="keyword">if</span> (app_win_id<span class="operator">.</span>open(<span class="type"><a href="http://doc.qt.io/qt-5/qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly)) {
fw <span class="operator">=</span> DForeignWindow<span class="operator">::</span>fromWinId(app_win_id<span class="operator">.</span>readAll()<span class="operator">.</span>toInt());
}
<span class="keyword">if</span> (fw) {
<a href="http://doc.qt.io/qt-5/qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> fw<span class="operator">-</span><span class="operator">></span>title();
fw<span class="operator">-</span><span class="operator">></span>connect(fw<span class="operator">,</span> <span class="operator">&</span>DForeignWindow<span class="operator">::</span>widthChanged<span class="operator">,</span> <span class="operator">[</span><span class="operator">&</span><span class="operator">]</span> {
<a href="http://doc.qt.io/qt-5/qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> fw<span class="operator">-</span><span class="operator">></span>width();
});
}
<span class="keyword">return</span> a<span class="operator">.</span>exec();
}
</pre>
<p>先启动应用 a 再启动应用 b</p>
<p>在应用 b 启动后将看到如下输出：</p>
<pre class="cpp">
<span class="string">"deepin"</span>
</pre>
<p>当改变应用 a 中的窗口宽度时，在应用 b 中会看到宽度的输出 <i>id</i> Returns</p>
<p><b>Warning:</b> 不要尝试对由本应用创建的窗口调用此接口，可能会导致窗口行为发生不可逆转的变化</p>
<!-- @@@fromWinId -->
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