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qt4-x11/doc/html/mainwindows-menus-mainwindow-cpp.html
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<h1 class="title">mainwindow.cpp Example File</h1>
<span class="small-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) 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:
**
** &quot;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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &quot;mainwindow.h&quot;</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">&gt;</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="preprocessor">#ifdef Q_OS_SYMBIAN</span>
infoLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;&lt;i&gt;Choose a menu option&lt;/i&gt;&quot;</span>));
<span class="preprocessor">#else</span>
infoLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;&lt;i&gt;Choose a menu option, or right-click to &quot;</span>
<span class="string">&quot;invoke a context menu&lt;/i&gt;&quot;</span>));
<span class="preprocessor">#endif</span>
infoLabel<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setAlignment(<span class="type"><a href="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">&gt;</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">&gt;</span>setMargin(<span class="number">5</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(topFiller);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(infoLabel);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(bottomFiller);
widget<span class="operator">-</span><span class="operator">&gt;</span>setLayout(layout);
createActions();
createMenus();
<span class="preprocessor">#ifndef Q_OS_SYMBIAN</span>
<span class="type"><a href="qstring.html">QString</a></span> message <span class="operator">=</span> tr(<span class="string">&quot;A context menu is available by right-clicking&quot;</span>);
statusBar()<span class="operator">-</span><span class="operator">&gt;</span>showMessage(message);
<span class="preprocessor">#endif</span>
setWindowTitle(tr(<span class="string">&quot;Menus&quot;</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="type">void</span> MainWindow<span class="operator">::</span>contextMenuEvent(<span class="type"><a href="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">&gt;</span>globalPos());
}
<span class="type">void</span> MainWindow<span class="operator">::</span>newFile()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;File|New&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>open()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;File|Open&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>save()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;File|Save&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>print()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;File|Print&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>undo()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Undo&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>redo()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Redo&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>cut()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Cut&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>copy()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Copy&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>paste()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Paste&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>bold()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Bold&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>italic()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Italic&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>leftAlign()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Left Align&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>rightAlign()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Right Align&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>justify()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Justify&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span><a href="qtextstream.html#center">center</a>()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Center&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setLineSpacing()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Set Line Spacing&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setParagraphSpacing()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Edit|Format|Set Paragraph Spacing&lt;/b&gt;&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>about()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Help|About&lt;/b&gt;&quot;</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">&quot;About Menu&quot;</span>)<span class="operator">,</span>
tr(<span class="string">&quot;The &lt;b&gt;Menu&lt;/b&gt; example shows how to create &quot;</span>
<span class="string">&quot;menu-bar menus and context menus.&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>aboutQt()
{
infoLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Invoked &lt;b&gt;Help|About Qt&lt;/b&gt;&quot;</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">&quot;&amp;New&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
newAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Create a new file&quot;</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>(tr(<span class="string">&quot;&amp;Open...&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
openAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Open an existing file&quot;</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>(tr(<span class="string">&quot;&amp;Save&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
saveAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Save the document to disk&quot;</span>));
connect(saveAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Print...&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
printAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcuts(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Print);
printAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Print the document&quot;</span>));
connect(printAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;E&amp;xit&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
exitAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Exit the application&quot;</span>));
connect(exitAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Undo&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
undoAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcuts(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Undo);
undoAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Undo the last operation&quot;</span>));
connect(undoAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Redo&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
redoAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcuts(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Redo);
redoAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Redo the last operation&quot;</span>));
connect(redoAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;Cu&amp;t&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
cutAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Cut the current selection's contents to the &quot;</span>
<span class="string">&quot;clipboard&quot;</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>(tr(<span class="string">&quot;&amp;Copy&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
copyAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Copy the current selection's contents to the &quot;</span>
<span class="string">&quot;clipboard&quot;</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>(tr(<span class="string">&quot;&amp;Paste&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
pasteAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>setStatusTip(tr(<span class="string">&quot;Paste the clipboard's contents into the current &quot;</span>
<span class="string">&quot;selection&quot;</span>));
connect(pasteAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Bold&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
boldAct<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
boldAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Bold);
boldAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Make the text bold&quot;</span>));
connect(boldAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(bold()));
<span class="type"><a href="qfont.html">QFont</a></span> boldFont <span class="operator">=</span> boldAct<span class="operator">-</span><span class="operator">&gt;</span>font();
boldFont<span class="operator">.</span>setBold(<span class="keyword">true</span>);
boldAct<span class="operator">-</span><span class="operator">&gt;</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">&quot;&amp;Italic&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
italicAct<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
italicAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(<span class="type"><a href="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Italic);
italicAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Make the text italic&quot;</span>));
connect(italicAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(italic()));
<span class="type"><a href="qfont.html">QFont</a></span> italicFont <span class="operator">=</span> italicAct<span class="operator">-</span><span class="operator">&gt;</span>font();
italicFont<span class="operator">.</span>setItalic(<span class="keyword">true</span>);
italicAct<span class="operator">-</span><span class="operator">&gt;</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">&quot;Set &amp;Line Spacing...&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
setLineSpacingAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Change the gap between the lines of a &quot;</span>
<span class="string">&quot;paragraph&quot;</span>));
connect(setLineSpacingAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;Set &amp;Paragraph Spacing...&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
setLineSpacingAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Change the gap between paragraphs&quot;</span>));
connect(setParagraphSpacingAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;About&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
aboutAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Show the application's About box&quot;</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">&quot;About &amp;Qt&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
aboutQtAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Show the Qt library's About box&quot;</span>));
connect(aboutQtAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> qApp<span class="operator">,</span> SLOT(aboutQt()));
connect(aboutQtAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Left Align&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
leftAlignAct<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
leftAlignAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(tr(<span class="string">&quot;Ctrl+L&quot;</span>));
leftAlignAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Left align the selected text&quot;</span>));
connect(leftAlignAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Right Align&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
rightAlignAct<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
rightAlignAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(tr(<span class="string">&quot;Ctrl+R&quot;</span>));
rightAlignAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Right align the selected text&quot;</span>));
connect(rightAlignAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Justify&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
justifyAct<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
justifyAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(tr(<span class="string">&quot;Ctrl+J&quot;</span>));
justifyAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Justify the selected text&quot;</span>));
connect(justifyAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&quot;&amp;Center&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
centerAct<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
centerAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(tr(<span class="string">&quot;Ctrl+E&quot;</span>));
centerAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Center the selected text&quot;</span>));
connect(centerAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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">&gt;</span>addAction(leftAlignAct);
alignmentGroup<span class="operator">-</span><span class="operator">&gt;</span>addAction(rightAlignAct);
alignmentGroup<span class="operator">-</span><span class="operator">&gt;</span>addAction(justifyAct);
alignmentGroup<span class="operator">-</span><span class="operator">&gt;</span>addAction(centerAct);
leftAlignAct<span class="operator">-</span><span class="operator">&gt;</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">&gt;</span>addMenu(tr(<span class="string">&quot;&amp;File&quot;</span>));
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(newAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(openAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(saveAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(printAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addSeparator();
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(exitAct);
editMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">&gt;</span>addMenu(tr(<span class="string">&quot;&amp;Edit&quot;</span>));
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(undoAct);
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(redoAct);
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addSeparator();
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(cutAct);
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(copyAct);
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(pasteAct);
editMenu<span class="operator">-</span><span class="operator">&gt;</span>addSeparator();
helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">&gt;</span>addMenu(tr(<span class="string">&quot;&amp;Help&quot;</span>));
helpMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(aboutAct);
helpMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(aboutQtAct);
formatMenu <span class="operator">=</span> editMenu<span class="operator">-</span><span class="operator">&gt;</span>addMenu(tr(<span class="string">&quot;&amp;Format&quot;</span>));
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(boldAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(italicAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addSeparator()<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Alignment&quot;</span>));
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(leftAlignAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(rightAlignAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(justifyAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(centerAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addSeparator();
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(setLineSpacingAct);
formatMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(setParagraphSpacingAct);
}</pre>
</div>
<!-- @@@mainwindows/menus/mainwindow.cpp -->
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