<?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 5.9</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 5.9</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-mainwindows-menus-example.html">Menus Example</a></td><td >mainwindow.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</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/menus/mainwindow.cpp</span> <!-- $$$mainwindows/menus/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> MainWindow<span class="operator">::</span>MainWindow() { <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>; setCentralWidget(widget); <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>topFiller <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>; topFiller<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding); infoLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"<i>Choose a menu option, or right-click to "</span> <span class="string">"invoke a context menu</i>"</span>)); infoLabel<span class="operator">-</span><span class="operator">></span>setFrameStyle(<span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>StyledPanel <span class="operator">|</span> <span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>Sunken); infoLabel<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignCenter); <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>bottomFiller <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>; bottomFiller<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>; layout<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">5</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(topFiller); layout<span class="operator">-</span><span class="operator">></span>addWidget(infoLabel); layout<span class="operator">-</span><span class="operator">></span>addWidget(bottomFiller); widget<span class="operator">-</span><span class="operator">></span>setLayout(layout); createActions(); createMenus(); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> message <span class="operator">=</span> tr(<span class="string">"A context menu is available by right-clicking"</span>); statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(message); setWindowTitle(tr(<span class="string">"Menus"</span>)); setMinimumSize(<span class="number">160</span><span class="operator">,</span> <span class="number">160</span>); resize(<span class="number">480</span><span class="operator">,</span> <span class="number">320</span>); } <span class="preprocessor">#ifndef QT_NO_CONTEXTMENU</span> <span class="type">void</span> MainWindow<span class="operator">::</span>contextMenuEvent(<span class="type"><a href="../qtgui/qcontextmenuevent.html">QContextMenuEvent</a></span> <span class="operator">*</span>event) { <span class="type"><a href="qmenu.html">QMenu</a></span> menu(<span class="keyword">this</span>); menu<span class="operator">.</span>addAction(cutAct); menu<span class="operator">.</span>addAction(copyAct); menu<span class="operator">.</span>addAction(pasteAct); menu<span class="operator">.</span>exec(event<span class="operator">-</span><span class="operator">></span>globalPos()); } <span class="preprocessor">#endif // QT_NO_CONTEXTMENU</span> <span class="type">void</span> MainWindow<span class="operator">::</span>newFile() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>File|New</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>open() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>File|Open</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>save() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>File|Save</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>print() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>File|Print</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>undo() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Undo</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>redo() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Redo</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>cut() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Cut</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>copy() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Copy</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>paste() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Paste</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>bold() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Bold</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>italic() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Italic</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>leftAlign() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Left Align</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>rightAlign() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Right Align</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>justify() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Justify</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>center() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Center</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>setLineSpacing() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Set Line Spacing</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>setParagraphSpacing() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Edit|Format|Set Paragraph Spacing</b>"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>about() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Help|About</b>"</span>)); <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 Menu"</span>)<span class="operator">,</span> tr(<span class="string">"The <b>Menu</b> example shows how to create "</span> <span class="string">"menu-bar menus and context menus."</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>aboutQt() { infoLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Invoked <b>Help|About Qt</b>"</span>)); } <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>(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); openAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></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); saveAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></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); printAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Print..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); printAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Print); printAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Print the document"</span>)); connect(printAct<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>print); 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="../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>)); connect(exitAct<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><span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>close); undoAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Undo"</span>)<span class="operator">,</span> <span class="keyword">this</span>); undoAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Undo); undoAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Undo the last operation"</span>)); connect(undoAct<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>undo); redoAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Redo"</span>)<span class="operator">,</span> <span class="keyword">this</span>); redoAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Redo); redoAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Redo the last operation"</span>)); connect(redoAct<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>redo); cutAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></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); copyAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></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); pasteAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></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); boldAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Bold"</span>)<span class="operator">,</span> <span class="keyword">this</span>); boldAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); boldAct<span class="operator">-</span><span class="operator">></span>setShortcut(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Bold); boldAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Make the text bold"</span>)); connect(boldAct<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>bold); <span class="type"><a href="../qtgui/qfont.html">QFont</a></span> boldFont <span class="operator">=</span> boldAct<span class="operator">-</span><span class="operator">></span>font(); boldFont<span class="operator">.</span>setBold(<span class="keyword">true</span>); boldAct<span class="operator">-</span><span class="operator">></span>setFont(boldFont); italicAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Italic"</span>)<span class="operator">,</span> <span class="keyword">this</span>); italicAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); italicAct<span class="operator">-</span><span class="operator">></span>setShortcut(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Italic); italicAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Make the text italic"</span>)); connect(italicAct<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>italic); <span class="type"><a href="../qtgui/qfont.html">QFont</a></span> italicFont <span class="operator">=</span> italicAct<span class="operator">-</span><span class="operator">></span>font(); italicFont<span class="operator">.</span>setItalic(<span class="keyword">true</span>); italicAct<span class="operator">-</span><span class="operator">></span>setFont(italicFont); setLineSpacingAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Set &Line Spacing..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); setLineSpacingAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Change the gap between the lines of a "</span> <span class="string">"paragraph"</span>)); connect(setLineSpacingAct<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>setLineSpacing); setParagraphSpacingAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Set &Paragraph Spacing..."</span>)<span class="operator">,</span> <span class="keyword">this</span>); setParagraphSpacingAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Change the gap between paragraphs"</span>)); connect(setParagraphSpacingAct<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>setParagraphSpacing); 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> <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>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> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> qApp<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>aboutQt); connect(aboutQtAct<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>aboutQt); leftAlignAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Left Align"</span>)<span class="operator">,</span> <span class="keyword">this</span>); leftAlignAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); leftAlignAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+L"</span>)); leftAlignAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Left align the selected text"</span>)); connect(leftAlignAct<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>leftAlign); rightAlignAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Right Align"</span>)<span class="operator">,</span> <span class="keyword">this</span>); rightAlignAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); rightAlignAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+R"</span>)); rightAlignAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Right align the selected text"</span>)); connect(rightAlignAct<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>rightAlign); justifyAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Justify"</span>)<span class="operator">,</span> <span class="keyword">this</span>); justifyAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); justifyAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+J"</span>)); justifyAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Justify the selected text"</span>)); connect(justifyAct<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>justify); centerAct <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"&Center"</span>)<span class="operator">,</span> <span class="keyword">this</span>); centerAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); centerAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+E"</span>)); centerAct<span class="operator">-</span><span class="operator">></span>setStatusTip(tr(<span class="string">"Center the selected text"</span>)); connect(centerAct<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>center); alignmentGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qactiongroup.html">QActionGroup</a></span>(<span class="keyword">this</span>); alignmentGroup<span class="operator">-</span><span class="operator">></span>addAction(leftAlignAct); alignmentGroup<span class="operator">-</span><span class="operator">></span>addAction(rightAlignAct); alignmentGroup<span class="operator">-</span><span class="operator">></span>addAction(justifyAct); alignmentGroup<span class="operator">-</span><span class="operator">></span>addAction(centerAct); leftAlignAct<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); } <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(printAct); fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); 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(undoAct); editMenu<span class="operator">-</span><span class="operator">></span>addAction(redoAct); editMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); 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); editMenu<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); formatMenu <span class="operator">=</span> editMenu<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Format"</span>)); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(boldAct); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(italicAct); formatMenu<span class="operator">-</span><span class="operator">></span>addSeparator()<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Alignment"</span>)); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(leftAlignAct); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(rightAlignAct); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(justifyAct); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(centerAct); formatMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(setLineSpacingAct); formatMenu<span class="operator">-</span><span class="operator">></span>addAction(setParagraphSpacingAct); } </pre> </div> <!-- @@@mainwindows/menus/mainwindow.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 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>