<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>mainwindow.cpp Example File | Qt Widgets 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-mainwindows-mdi-example.html">MDI Example</a></td><td >mainwindow.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">mainwindow.cpp Example File</h1> <span class="subtitle">mainwindows/mdi/mainwindow.cpp</span> <!-- $$$mainwindows/mdi/mainwindow.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include "mainwindow.h"</span> <span class="preprocessor">#include "mdichild.h"</span> MainWindow<span class="operator">::</span>MainWindow() : mdiArea(<span class="keyword">new</span> <span class="type"><a href="qmdiarea.html">QMdiArea</a></span>) { mdiArea<span class="operator">-</span><span class="operator">></span>setHorizontalScrollBarPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAsNeeded); mdiArea<span class="operator">-</span><span class="operator">></span>setVerticalScrollBarPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAsNeeded); setCentralWidget(mdiArea); connect(mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>subWindowActivated<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>updateMenus); createActions(); createStatusBar(); updateMenus(); readSettings(); setWindowTitle(tr(<span class="string">"MDI"</span>)); setUnifiedTitleAndToolBarOnMac(<span class="keyword">true</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>closeEvent(<span class="type"><a href="../qtgui/qcloseevent.html">QCloseEvent</a></span> <span class="operator">*</span>event) { mdiArea<span class="operator">-</span><span class="operator">></span>closeAllSubWindows(); <span class="keyword">if</span> (mdiArea<span class="operator">-</span><span class="operator">></span>currentSubWindow()) { event<span class="operator">-</span><span class="operator">></span>ignore(); } <span class="keyword">else</span> { writeSettings(); event<span class="operator">-</span><span class="operator">></span>accept(); } } <span class="type">void</span> MainWindow<span class="operator">::</span>newFile() { MdiChild <span class="operator">*</span>child <span class="operator">=</span> createMdiChild(); child<span class="operator">-</span><span class="operator">></span>newFile(); child<span class="operator">-</span><span class="operator">></span>show(); } <span class="type">void</span> MainWindow<span class="operator">::</span>open() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span>); <span class="keyword">if</span> (<span class="operator">!</span>fileName<span class="operator">.</span>isEmpty()) openFile(fileName); } bool MainWindow<span class="operator">::</span>openFile(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) { <span class="keyword">if</span> (<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>existing <span class="operator">=</span> findMdiChild(fileName)) { mdiArea<span class="operator">-</span><span class="operator">></span>setActiveSubWindow(existing); <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="keyword">const</span> bool succeeded <span class="operator">=</span> loadFile(fileName); <span class="keyword">if</span> (succeeded) statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"File loaded"</span>)<span class="operator">,</span> <span class="number">2000</span>); <span class="keyword">return</span> succeeded; } bool MainWindow<span class="operator">::</span>loadFile(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) { MdiChild <span class="operator">*</span>child <span class="operator">=</span> createMdiChild(); <span class="keyword">const</span> bool succeeded <span class="operator">=</span> child<span class="operator">-</span><span class="operator">></span>loadFile(fileName); <span class="keyword">if</span> (succeeded) child<span class="operator">-</span><span class="operator">></span>show(); <span class="keyword">else</span> child<span class="operator">-</span><span class="operator">></span>close(); MainWindow<span class="operator">::</span>prependToRecentFiles(fileName); <span class="keyword">return</span> succeeded; } <span class="keyword">static</span> <span class="keyword">inline</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> recentFilesKey() { <span class="keyword">return</span> <span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"recentFileList"</span>); } <span class="keyword">static</span> <span class="keyword">inline</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileKey() { <span class="keyword">return</span> <span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"file"</span>); } <span class="keyword">static</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> readRecentFiles(<span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> <span class="operator">&</span>settings) { <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> result; <span class="keyword">const</span> <span class="type">int</span> count <span class="operator">=</span> settings<span class="operator">.</span>beginReadArray(recentFilesKey()); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> count; <span class="operator">+</span><span class="operator">+</span>i) { settings<span class="operator">.</span>setArrayIndex(i); result<span class="operator">.</span>append(settings<span class="operator">.</span>value(fileKey())<span class="operator">.</span>toString()); } settings<span class="operator">.</span>endArray(); <span class="keyword">return</span> result; } <span class="keyword">static</span> <span class="type">void</span> writeRecentFiles(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> <span class="operator">&</span>files<span class="operator">,</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> <span class="operator">&</span>settings) { <span class="keyword">const</span> <span class="type">int</span> count <span class="operator">=</span> files<span class="operator">.</span>size(); settings<span class="operator">.</span>beginWriteArray(recentFilesKey()); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> count; <span class="operator">+</span><span class="operator">+</span>i) { settings<span class="operator">.</span>setArrayIndex(i); settings<span class="operator">.</span>setValue(fileKey()<span class="operator">,</span> files<span class="operator">.</span>at(i)); } settings<span class="operator">.</span>endArray(); } bool MainWindow<span class="operator">::</span>hasRecentFiles() { <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>organizationName()<span class="operator">,</span> <span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName()); <span class="keyword">const</span> <span class="type">int</span> count <span class="operator">=</span> settings<span class="operator">.</span>beginReadArray(recentFilesKey()); settings<span class="operator">.</span>endArray(); <span class="keyword">return</span> count <span class="operator">></span> <span class="number">0</span>; } <span class="type">void</span> MainWindow<span class="operator">::</span>prependToRecentFiles(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) { <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>organizationName()<span class="operator">,</span> <span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName()); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> oldRecentFiles <span class="operator">=</span> readRecentFiles(settings); <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> recentFiles <span class="operator">=</span> oldRecentFiles; recentFiles<span class="operator">.</span>removeAll(fileName); recentFiles<span class="operator">.</span>prepend(fileName); <span class="keyword">if</span> (oldRecentFiles <span class="operator">!</span><span class="operator">=</span> recentFiles) writeRecentFiles(recentFiles<span class="operator">,</span> settings); setRecentFilesVisible(<span class="operator">!</span>recentFiles<span class="operator">.</span>isEmpty()); } <span class="type">void</span> MainWindow<span class="operator">::</span>setRecentFilesVisible(bool visible) { recentFileSubMenuAct<span class="operator">-</span><span class="operator">></span>setVisible(visible); recentFileSeparator<span class="operator">-</span><span class="operator">></span>setVisible(visible); } <span class="type">void</span> MainWindow<span class="operator">::</span>updateRecentFileActions() { <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>organizationName()<span class="operator">,</span> <span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName()); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> recentFiles <span class="operator">=</span> readRecentFiles(settings); <span class="keyword">const</span> <span class="type">int</span> count <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(<span class="type">int</span>(MaxRecentFiles)<span class="operator">,</span> recentFiles<span class="operator">.</span>size()); <span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> ( ; i <span class="operator"><</span> count; <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="../qtcore/qfileinfo.html">QFileInfo</a></span>(recentFiles<span class="operator">.</span>at(i))<span class="operator">.</span>fileName(); recentFileActs<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"&%1 %2"</span>)<span class="operator">.</span>arg(i <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>arg(fileName)); recentFileActs<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setData(recentFiles<span class="operator">.</span>at(i)); recentFileActs<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>); } <span class="keyword">for</span> ( ; i <span class="operator"><</span> MaxRecentFiles; <span class="operator">+</span><span class="operator">+</span>i) recentFileActs<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>openRecentFile() { <span class="keyword">if</span> (<span class="keyword">const</span> <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="keyword">const</span> <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span><span class="operator">></span>(sender())) openFile(action<span class="operator">-</span><span class="operator">></span>data()<span class="operator">.</span>toString()); } <span class="type">void</span> MainWindow<span class="operator">::</span>save() { <span class="keyword">if</span> (activeMdiChild() <span class="operator">&</span><span class="operator">&</span> activeMdiChild()<span class="operator">-</span><span class="operator">></span>save()) statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"File saved"</span>)<span class="operator">,</span> <span class="number">2000</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>saveAs() { MdiChild <span class="operator">*</span>child <span class="operator">=</span> activeMdiChild(); <span class="keyword">if</span> (child <span class="operator">&</span><span class="operator">&</span> child<span class="operator">-</span><span class="operator">></span>saveAs()) { statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"File saved"</span>)<span class="operator">,</span> <span class="number">2000</span>); MainWindow<span class="operator">::</span>prependToRecentFiles(child<span class="operator">-</span><span class="operator">></span>currentFile()); } } <span class="preprocessor">#ifndef QT_NO_CLIPBOARD</span> <span class="type">void</span> MainWindow<span class="operator">::</span>cut() { <span class="keyword">if</span> (activeMdiChild()) activeMdiChild()<span class="operator">-</span><span class="operator">></span>cut(); } <span class="type">void</span> MainWindow<span class="operator">::</span>copy() { <span class="keyword">if</span> (activeMdiChild()) activeMdiChild()<span class="operator">-</span><span class="operator">></span>copy(); } <span class="type">void</span> MainWindow<span class="operator">::</span>paste() { <span class="keyword">if</span> (activeMdiChild()) activeMdiChild()<span class="operator">-</span><span class="operator">></span>paste(); } <span class="preprocessor">#endif</span> <span class="type">void</span> MainWindow<span class="operator">::</span>about() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About MDI"</span>)<span class="operator">,</span> tr(<span class="string">"The <b>MDI</b> example demonstrates how to write multiple "</span> <span class="string">"document interface applications using Qt."</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>updateMenus() { bool hasMdiChild <span class="operator">=</span> (activeMdiChild() <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>); saveAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); saveAsAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); <span class="preprocessor">#ifndef QT_NO_CLIPBOARD</span> pasteAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); <span class="preprocessor">#endif</span> closeAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); closeAllAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); tileAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); cascadeAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); nextAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); previousAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); windowMenuSeparatorAct<span class="operator">-</span><span class="operator">></span>setVisible(hasMdiChild); <span class="preprocessor">#ifndef QT_NO_CLIPBOARD</span> bool hasSelection <span class="operator">=</span> (activeMdiChild() <span class="operator">&</span><span class="operator">&</span> activeMdiChild()<span class="operator">-</span><span class="operator">></span>textCursor()<span class="operator">.</span>hasSelection()); cutAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasSelection); copyAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasSelection); <span class="preprocessor">#endif</span> } <span class="type">void</span> MainWindow<span class="operator">::</span>updateWindowMenu() { windowMenu<span class="operator">-</span><span class="operator">></span>clear(); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(closeAct); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(closeAllAct); windowMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(tileAct); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(cascadeAct); windowMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(nextAct); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(previousAct); windowMenu<span class="operator">-</span><span class="operator">></span>addAction(windowMenuSeparatorAct); <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span><span class="operator">></span> windows <span class="operator">=</span> mdiArea<span class="operator">-</span><span class="operator">></span>subWindowList(); windowMenuSeparatorAct<span class="operator">-</span><span class="operator">></span>setVisible(<span class="operator">!</span>windows<span class="operator">.</span>isEmpty()); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> windows<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>mdiSubWindow <span class="operator">=</span> windows<span class="operator">.</span>at(i); MdiChild <span class="operator">*</span>child <span class="operator">=</span> qobject_cast<span class="operator"><</span>MdiChild <span class="operator">*</span><span class="operator">></span>(mdiSubWindow<span class="operator">-</span><span class="operator">></span>widget()); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> text; <span class="keyword">if</span> (i <span class="operator"><</span> <span class="number">9</span>) { text <span class="operator">=</span> tr(<span class="string">"&%1 %2"</span>)<span class="operator">.</span>arg(i <span class="operator">+</span> <span class="number">1</span>) <span class="operator">.</span>arg(child<span class="operator">-</span><span class="operator">></span>userFriendlyCurrentFile()); } <span class="keyword">else</span> { text <span class="operator">=</span> tr(<span class="string">"%1 %2"</span>)<span class="operator">.</span>arg(i <span class="operator">+</span> <span class="number">1</span>) <span class="operator">.</span>arg(child<span class="operator">-</span><span class="operator">></span>userFriendlyCurrentFile()); } <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action <span class="operator">=</span> windowMenu<span class="operator">-</span><span class="operator">></span>addAction(text<span class="operator">,</span> mdiSubWindow<span class="operator">,</span> <span class="operator">[</span><span class="keyword">this</span><span class="operator">,</span> mdiSubWindow<span class="operator">]</span>() { mdiArea<span class="operator">-</span><span class="operator">></span>setActiveSubWindow(mdiSubWindow); }); action<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); action <span class="operator">-</span><span class="operator">></span>setChecked(child <span class="operator">=</span><span class="operator">=</span> activeMdiChild()); } } MdiChild <span class="operator">*</span>MainWindow<span class="operator">::</span>createMdiChild() { MdiChild <span class="operator">*</span>child <span class="operator">=</span> <span class="keyword">new</span> MdiChild; mdiArea<span class="operator">-</span><span class="operator">></span>addSubWindow(child); <span class="preprocessor">#ifndef QT_NO_CLIPBOARD</span> connect(child<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qtextedit.html">QTextEdit</a></span><span class="operator">::</span>copyAvailable<span class="operator">,</span> cutAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>setEnabled); connect(child<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qtextedit.html">QTextEdit</a></span><span class="operator">::</span>copyAvailable<span class="operator">,</span> copyAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>setEnabled); <span class="preprocessor">#endif</span> <span class="keyword">return</span> child; } <span class="type">void</span> MainWindow<span class="operator">::</span>createActions() { <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&File"</span>)); <span class="type"><a href="qtoolbar.html">QToolBar</a></span> <span class="operator">*</span>fileToolBar <span class="operator">=</span> addToolBar(tr(<span class="string">"File"</span>)); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> newIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"document-new"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/images/new.png"</span>)); newAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(newIcon<span class="operator">,</span> tr(<span class="string">"&New"</span>)<span class="operator">,</span> <span class="keyword">this</span>); newAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>New); newAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Create a new file"</span>)); connect(newAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>newFile); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(newAct); fileToolBar<span class="operator">-</span><span class="operator">></span>addAction(newAct); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> openIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"document-open"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/images/open.png"</span>)); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>openAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(openIcon<span class="operator">,</span> tr(<span class="string">"&Open..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); openAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Open); openAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Open an existing file"</span>)); connect(openAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>open); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(openAct); fileToolBar<span class="operator">-</span><span class="operator">></span>addAction(openAct); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> saveIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"document-save"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/images/save.png"</span>)); saveAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(saveIcon<span class="operator">,</span> tr(<span class="string">"&Save"</span>)<span class="operator">,</span> <span class="keyword">this</span>); saveAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Save); saveAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Save the document to disk"</span>)); connect(saveAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>save); fileToolBar<span class="operator">-</span><span class="operator">></span>addAction(saveAct); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> saveAsIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"document-save-as"</span>); saveAsAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(saveAsIcon<span class="operator">,</span> tr(<span class="string">"Save &As..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); saveAsAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>SaveAs); saveAsAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Save the document under a new name"</span>)); connect(saveAsAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>saveAs); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(saveAsAct); fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>recentMenu <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"Recent..."</span>)); connect(recentMenu<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">::</span>aboutToShow<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>updateRecentFileActions); recentFileSubMenuAct <span class="operator">=</span> recentMenu<span class="operator">-</span><span class="operator">></span>menuAction(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> MaxRecentFiles; <span class="operator">+</span><span class="operator">+</span>i) { recentFileActs<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> recentMenu<span class="operator">-</span><span class="operator">></span>addAction(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>()<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>openRecentFile); recentFileActs<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>); } recentFileSeparator <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); setRecentFilesVisible(MainWindow<span class="operator">::</span>hasRecentFiles()); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Switch layout direction"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>switchLayoutDirection); fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> exitIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"application-exit"</span>); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>exitAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(exitIcon<span class="operator">,</span> tr(<span class="string">"E&xit"</span>)<span class="operator">,</span> <a href="qapplication.html#qApp">qApp</a><span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>closeAllWindows); exitAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Quit); exitAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Exit the application"</span>)); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(exitAct); <span class="preprocessor">#ifndef QT_NO_CLIPBOARD</span> <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>editMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Edit"</span>)); <span class="type"><a href="qtoolbar.html">QToolBar</a></span> <span class="operator">*</span>editToolBar <span class="operator">=</span> addToolBar(tr(<span class="string">"Edit"</span>)); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> cutIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"edit-cut"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/images/cut.png"</span>)); cutAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(cutIcon<span class="operator">,</span> tr(<span class="string">"Cu&t"</span>)<span class="operator">,</span> <span class="keyword">this</span>); cutAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Cut); cutAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Cut the current selection's contents to the "</span> <span class="string">"clipboard"</span>)); connect(cutAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>cut); editMenu<span class="operator">-</span><span class="operator">></span>addAction(cutAct); editToolBar<span class="operator">-</span><span class="operator">></span>addAction(cutAct); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> copyIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"edit-copy"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/images/copy.png"</span>)); copyAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(copyIcon<span class="operator">,</span> tr(<span class="string">"&Copy"</span>)<span class="operator">,</span> <span class="keyword">this</span>); copyAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Copy); copyAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Copy the current selection's contents to the "</span> <span class="string">"clipboard"</span>)); connect(copyAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>copy); editMenu<span class="operator">-</span><span class="operator">></span>addAction(copyAct); editToolBar<span class="operator">-</span><span class="operator">></span>addAction(copyAct); <span class="keyword">const</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span> pasteIcon <span class="operator">=</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span><span class="operator">::</span>fromTheme(<span class="string">"edit-paste"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/images/paste.png"</span>)); pasteAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(pasteIcon<span class="operator">,</span> tr(<span class="string">"&Paste"</span>)<span class="operator">,</span> <span class="keyword">this</span>); pasteAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Paste); pasteAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Paste the clipboard's contents into the current "</span> <span class="string">"selection"</span>)); connect(pasteAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>paste); editMenu<span class="operator">-</span><span class="operator">></span>addAction(pasteAct); editToolBar<span class="operator">-</span><span class="operator">></span>addAction(pasteAct); <span class="preprocessor">#endif</span> windowMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Window"</span>)); connect(windowMenu<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmenu.html">QMenu</a></span><span class="operator">::</span>aboutToShow<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>updateWindowMenu); closeAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Cl&ose"</span>)<span class="operator">,</span> <span class="keyword">this</span>); closeAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Close the active window"</span>)); connect(closeAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>closeActiveSubWindow); closeAllAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Close &All"</span>)<span class="operator">,</span> <span class="keyword">this</span>); closeAllAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Close all the windows"</span>)); connect(closeAllAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>closeAllSubWindows); tileAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Tile"</span>)<span class="operator">,</span> <span class="keyword">this</span>); tileAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Tile the windows"</span>)); connect(tileAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>tileSubWindows); cascadeAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Cascade"</span>)<span class="operator">,</span> <span class="keyword">this</span>); cascadeAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Cascade the windows"</span>)); connect(cascadeAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>cascadeSubWindows); nextAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Ne&xt"</span>)<span class="operator">,</span> <span class="keyword">this</span>); nextAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>NextChild); nextAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Move the focus to the next window"</span>)); connect(nextAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>activateNextSubWindow); previousAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Pre&vious"</span>)<span class="operator">,</span> <span class="keyword">this</span>); previousAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>PreviousChild); previousAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Move the focus to the previous "</span> <span class="string">"window"</span>)); connect(previousAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> mdiArea<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmdiarea.html">QMdiArea</a></span><span class="operator">::</span>activatePreviousSubWindow); windowMenuSeparatorAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="keyword">this</span>); windowMenuSeparatorAct<span class="operator">-</span><span class="operator">></span>setSeparator(<span class="keyword">true</span>); updateWindowMenu(); menuBar()<span class="operator">-</span><span class="operator">></span>addSeparator(); <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Help"</span>)); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>aboutAct <span class="operator">=</span> helpMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&About"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>about); aboutAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Show the application's About box"</span>)); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>aboutQtAct <span class="operator">=</span> helpMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"About &Qt"</span>)<span class="operator">,</span> <a href="qapplication.html#qApp">qApp</a><span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>aboutQt); aboutQtAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Show the Qt library's About box"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>createStatusBar() { statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"Ready"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>readSettings() { <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>organizationName()<span class="operator">,</span> <span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName()); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> geometry <span class="operator">=</span> settings<span class="operator">.</span>value(<span class="string">"geometry"</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span>())<span class="operator">.</span>toByteArray(); <span class="keyword">if</span> (geometry<span class="operator">.</span>isEmpty()) { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> availableGeometry <span class="operator">=</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>desktop()<span class="operator">-</span><span class="operator">></span>availableGeometry(<span class="keyword">this</span>); resize(availableGeometry<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">3</span><span class="operator">,</span> availableGeometry<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2</span>); move((availableGeometry<span class="operator">.</span>width() <span class="operator">-</span> width()) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (availableGeometry<span class="operator">.</span>height() <span class="operator">-</span> height()) <span class="operator">/</span> <span class="number">2</span>); } <span class="keyword">else</span> { restoreGeometry(geometry); } } <span class="type">void</span> MainWindow<span class="operator">::</span>writeSettings() { <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>organizationName()<span class="operator">,</span> <span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName()); settings<span class="operator">.</span>setValue(<span class="string">"geometry"</span><span class="operator">,</span> saveGeometry()); } MdiChild <span class="operator">*</span>MainWindow<span class="operator">::</span>activeMdiChild() <span class="keyword">const</span> { <span class="keyword">if</span> (<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>activeSubWindow <span class="operator">=</span> mdiArea<span class="operator">-</span><span class="operator">></span>activeSubWindow()) <span class="keyword">return</span> qobject_cast<span class="operator"><</span>MdiChild <span class="operator">*</span><span class="operator">></span>(activeSubWindow<span class="operator">-</span><span class="operator">></span>widget()); <span class="keyword">return</span> <span class="number">0</span>; } <span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>MainWindow<span class="operator">::</span>findMdiChild(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) <span class="keyword">const</span> { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> canonicalFilePath <span class="operator">=</span> <span class="type"><a href="../qtcore/qfileinfo.html">QFileInfo</a></span>(fileName)<span class="operator">.</span>canonicalFilePath(); foreach (<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>window<span class="operator">,</span> mdiArea<span class="operator">-</span><span class="operator">></span>subWindowList()) { MdiChild <span class="operator">*</span>mdiChild <span class="operator">=</span> qobject_cast<span class="operator"><</span>MdiChild <span class="operator">*</span><span class="operator">></span>(window<span class="operator">-</span><span class="operator">></span>widget()); <span class="keyword">if</span> (mdiChild<span class="operator">-</span><span class="operator">></span>currentFile() <span class="operator">=</span><span class="operator">=</span> canonicalFilePath) <span class="keyword">return</span> window; } <span class="keyword">return</span> <span class="number">0</span>; } <span class="type">void</span> MainWindow<span class="operator">::</span>switchLayoutDirection() { <span class="keyword">if</span> (layoutDirection() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>LeftToRight) <span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>setLayoutDirection(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>RightToLeft); <span class="keyword">else</span> <span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>setLayoutDirection(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>LeftToRight); } </pre> </div> <!-- @@@mainwindows/mdi/mainwindow.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>