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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">mainwindow.cpp Example File</h1> <span class="small-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) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 <QtGui></span> <span class="preprocessor">#include "mainwindow.h"</span> <span class="preprocessor">#include "mdichild.h"</span> MainWindow<span class="operator">::</span>MainWindow() { mdiArea <span class="operator">=</span> <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="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="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAsNeeded); setCentralWidget(mdiArea); connect(mdiArea<span class="operator">,</span> SIGNAL(subWindowActivated(<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span><span class="operator">*</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateMenus())); windowMapper <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsignalmapper.html">QSignalMapper</a></span>(<span class="keyword">this</span>); connect(windowMapper<span class="operator">,</span> SIGNAL(mapped(<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setActiveSubWindow(<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span>))); createActions(); createMenus(); createToolBars(); 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="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="type"><a href="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()) { <span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>existing <span class="operator">=</span> findMdiChild(fileName); <span class="keyword">if</span> (existing) { mdiArea<span class="operator">-</span><span class="operator">></span>setActiveSubWindow(existing); <span class="keyword">return</span>; } MdiChild <span class="operator">*</span>child <span class="operator">=</span> createMdiChild(); <span class="keyword">if</span> (child<span class="operator">-</span><span class="operator">></span>loadFile(fileName)) { 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>); 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(); } } } <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() { <span class="keyword">if</span> (activeMdiChild() <span class="operator">&</span><span class="operator">&</span> activeMdiChild()<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>); } <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="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() { <span class="type">bool</span> 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); pasteAct<span class="operator">-</span><span class="operator">></span>setEnabled(hasMdiChild); 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); separatorAct<span class="operator">-</span><span class="operator">></span>setVisible(hasMdiChild); <span class="type">bool</span> 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="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(separatorAct); <span class="type"><a href="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(); separatorAct<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) { 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>(windows<span class="operator">.</span>at(i)<span class="operator">-</span><span class="operator">></span>widget()); <span class="type"><a href="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); 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()); connect(action<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> windowMapper<span class="operator">,</span> SLOT(map())); windowMapper<span class="operator">-</span><span class="operator">></span>setMapping(action<span class="operator">,</span> windows<span class="operator">.</span>at(i)); } } 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); connect(child<span class="operator">,</span> SIGNAL(copyAvailable(<span class="type">bool</span>))<span class="operator">,</span> cutAct<span class="operator">,</span> SLOT(setEnabled(<span class="type">bool</span>))); connect(child<span class="operator">,</span> SIGNAL(copyAvailable(<span class="type">bool</span>))<span class="operator">,</span> copyAct<span class="operator">,</span> SLOT(setEnabled(<span class="type">bool</span>))); <span class="keyword">return</span> child; } <span class="type">void</span> MainWindow<span class="operator">::</span>createActions() { newAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/new.png"</span>)<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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(newFile())); openAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/open.png"</span>)<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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(open())); saveAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/save.png"</span>)<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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(save())); saveAsAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(saveAs())); exitAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"E&xit"</span>)<span class="operator">,</span> <span class="keyword">this</span>); exitAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="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>)); connect(exitAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> qApp<span class="operator">,</span> SLOT(closeAllWindows())); cutAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/cut.png"</span>)<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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(cut())); copyAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/copy.png"</span>)<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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(copy())); pasteAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/paste.png"</span>)<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="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> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(paste())); 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> SIGNAL(triggered())<span class="operator">,</span> mdiArea<span class="operator">,</span> SLOT(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> SIGNAL(triggered())<span class="operator">,</span> mdiArea<span class="operator">,</span> SLOT(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> SIGNAL(triggered())<span class="operator">,</span> mdiArea<span class="operator">,</span> SLOT(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> SIGNAL(triggered())<span class="operator">,</span> mdiArea<span class="operator">,</span> SLOT(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="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> SIGNAL(triggered())<span class="operator">,</span> mdiArea<span class="operator">,</span> SLOT(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="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> SIGNAL(triggered())<span class="operator">,</span> mdiArea<span class="operator">,</span> SLOT(activatePreviousSubWindow())); separatorAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(<span class="keyword">this</span>); separatorAct<span class="operator">-</span><span class="operator">></span>setSeparator(<span class="keyword">true</span>); aboutAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&About"</span>)<span class="operator">,</span> <span class="keyword">this</span>); aboutAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Show the application's About box"</span>)); connect(aboutAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(about())); aboutQtAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"About &Qt"</span>)<span class="operator">,</span> <span class="keyword">this</span>); aboutQtAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Show the Qt library's About box"</span>)); connect(aboutQtAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> qApp<span class="operator">,</span> SLOT(aboutQt())); } <span class="type">void</span> MainWindow<span class="operator">::</span>createMenus() { fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&File"</span>)); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(newAct); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(openAct); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(saveAct); 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="qaction.html">QAction</a></span> <span class="operator">*</span>action <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Switch layout direction"</span>)); connect(action<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(switchLayoutDirection())); fileMenu<span class="operator">-</span><span class="operator">></span>addAction(exitAct); editMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Edit"</span>)); editMenu<span class="operator">-</span><span class="operator">></span>addAction(cutAct); editMenu<span class="operator">-</span><span class="operator">></span>addAction(copyAct); editMenu<span class="operator">-</span><span class="operator">></span>addAction(pasteAct); windowMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Window"</span>)); updateWindowMenu(); connect(windowMenu<span class="operator">,</span> SIGNAL(aboutToShow())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateWindowMenu())); menuBar()<span class="operator">-</span><span class="operator">></span>addSeparator(); helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Help"</span>)); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutAct); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutQtAct); } <span class="type">void</span> MainWindow<span class="operator">::</span>createToolBars() { fileToolBar <span class="operator">=</span> addToolBar(tr(<span class="string">"File"</span>)); fileToolBar<span class="operator">-</span><span class="operator">></span>addAction(newAct); fileToolBar<span class="operator">-</span><span class="operator">></span>addAction(openAct); fileToolBar<span class="operator">-</span><span class="operator">></span>addAction(saveAct); editToolBar <span class="operator">=</span> addToolBar(tr(<span class="string">"Edit"</span>)); editToolBar<span class="operator">-</span><span class="operator">></span>addAction(cutAct); editToolBar<span class="operator">-</span><span class="operator">></span>addAction(copyAct); editToolBar<span class="operator">-</span><span class="operator">></span>addAction(pasteAct); } <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="qsettings.html">QSettings</a></span> settings(<span class="string">"Trolltech"</span><span class="operator">,</span> <span class="string">"MDI Example"</span>); <span class="type"><a href="qpoint.html">QPoint</a></span> pos <span class="operator">=</span> settings<span class="operator">.</span>value(<span class="string">"pos"</span><span class="operator">,</span> <span class="type"><a href="qpoint.html">QPoint</a></span>(<span class="number">200</span><span class="operator">,</span> <span class="number">200</span>))<span class="operator">.</span>toPoint(); <span class="type"><a href="qsize.html">QSize</a></span> size <span class="operator">=</span> settings<span class="operator">.</span>value(<span class="string">"size"</span><span class="operator">,</span> <span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">400</span><span class="operator">,</span> <span class="number">400</span>))<span class="operator">.</span>toSize(); move(pos); resize(size); } <span class="type">void</span> MainWindow<span class="operator">::</span>writeSettings() { <span class="type"><a href="qsettings.html">QSettings</a></span> settings(<span class="string">"Trolltech"</span><span class="operator">,</span> <span class="string">"MDI Example"</span>); settings<span class="operator">.</span>setValue(<span class="string">"pos"</span><span class="operator">,</span> pos()); settings<span class="operator">.</span>setValue(<span class="string">"size"</span><span class="operator">,</span> size()); } MdiChild <span class="operator">*</span>MainWindow<span class="operator">::</span>activeMdiChild() { <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="qstring.html">QString</a></span> <span class="operator">&</span>fileName) { <span class="type"><a href="qstring.html">QString</a></span> canonicalFilePath <span class="operator">=</span> <span class="type"><a href="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="qt.html">Qt</a></span><span class="operator">::</span>LeftToRight) qApp<span class="operator">-</span><span class="operator">></span>setLayoutDirection(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RightToLeft); <span class="keyword">else</span> qApp<span class="operator">-</span><span class="operator">></span>setLayoutDirection(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>LeftToRight); } <span class="type">void</span> MainWindow<span class="operator">::</span>setActiveSubWindow(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>window) { <span class="keyword">if</span> (<span class="operator">!</span>window) <span class="keyword">return</span>; mdiArea<span class="operator">-</span><span class="operator">></span>setActiveSubWindow(qobject_cast<span class="operator"><</span><span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span><span class="operator">></span>(window)); }</pre> </div> <!-- @@@mainwindows/mdi/mainwindow.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> 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.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> 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. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>