405 lines
27 KiB
HTML
405 lines
27 KiB
HTML
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<h1 class="title">mainwindow.cpp Example File</h1>
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<span class="small-subtitle">tools/codecs/mainwindow.cpp</span>
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<!-- $$$tools/codecs/mainwindow.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QtGui></span>
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<span class="preprocessor">#include "mainwindow.h"</span>
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<span class="preprocessor">#include "previewform.h"</span>
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MainWindow<span class="operator">::</span>MainWindow()
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{
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textEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtextedit.html">QTextEdit</a></span>;
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textEdit<span class="operator">-</span><span class="operator">></span>setLineWrapMode(<span class="type"><a href="qtextedit.html">QTextEdit</a></span><span class="operator">::</span>NoWrap);
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setCentralWidget(textEdit);
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findCodecs();
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previewForm <span class="operator">=</span> <span class="keyword">new</span> PreviewForm(<span class="keyword">this</span>);
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previewForm<span class="operator">-</span><span class="operator">></span>setCodecList(codecs);
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createActions();
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createMenus();
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setWindowTitle(tr(<span class="string">"Codecs"</span>));
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resize(<span class="number">500</span><span class="operator">,</span> <span class="number">400</span>);
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}
|
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<span class="type">void</span> MainWindow<span class="operator">::</span>open()
|
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{
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<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="qfile.html">QFile</a></span> file(fileName);
|
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<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">.</span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly)) {
|
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<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Codecs"</span>)<span class="operator">,</span>
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tr(<span class="string">"Cannot read file %1:\n%2"</span>)
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<span class="operator">.</span>arg(fileName)
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|
<span class="operator">.</span>arg(file<span class="operator">.</span>errorString()));
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|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> data <span class="operator">=</span> file<span class="operator">.</span>readAll();
|
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|
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previewForm<span class="operator">-</span><span class="operator">></span>setEncodedData(data);
|
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<span class="keyword">if</span> (previewForm<span class="operator">-</span><span class="operator">></span>exec())
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textEdit<span class="operator">-</span><span class="operator">></span>setPlainText(previewForm<span class="operator">-</span><span class="operator">></span>decodedString());
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}
|
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}
|
|
|
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<span class="type">void</span> MainWindow<span class="operator">::</span>save()
|
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{
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<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>getSaveFileName(<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="qfile.html">QFile</a></span> file(fileName);
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">.</span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>WriteOnly <span class="operator">|</span> <span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>Text)) {
|
|
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Codecs"</span>)<span class="operator">,</span>
|
|
tr(<span class="string">"Cannot write file %1:\n%2"</span>)
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|
<span class="operator">.</span>arg(fileName)
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|
<span class="operator">.</span>arg(file<span class="operator">.</span>errorString()));
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span><span class="operator">></span>(sender());
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|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> codecName <span class="operator">=</span> action<span class="operator">-</span><span class="operator">></span>data()<span class="operator">.</span>toByteArray();
|
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<span class="type"><a href="qtextstream.html">QTextStream</a></span> out(<span class="operator">&</span>file);
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out<span class="operator">.</span>setCodec(codecName);
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out <span class="operator"><</span><span class="operator"><</span> textEdit<span class="operator">-</span><span class="operator">></span>toPlainText();
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}
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}
|
|
|
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<span class="type">void</span> MainWindow<span class="operator">::</span>about()
|
|
{
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|
<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 Codecs"</span>)<span class="operator">,</span>
|
|
tr(<span class="string">"The <b>Codecs</b> example demonstrates how to read and write "</span>
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|
<span class="string">"files using various encodings."</span>));
|
|
}
|
|
|
|
<span class="type">void</span> MainWindow<span class="operator">::</span>aboutToShowSaveAsMenu()
|
|
{
|
|
<span class="type"><a href="qstring.html">QString</a></span> currentText <span class="operator">=</span> textEdit<span class="operator">-</span><span class="operator">></span>toPlainText();
|
|
|
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foreach (<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action<span class="operator">,</span> saveAsActs) {
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> codecName <span class="operator">=</span> action<span class="operator">-</span><span class="operator">></span>data()<span class="operator">.</span>toByteArray();
|
|
<span class="type"><a href="qtextcodec.html">QTextCodec</a></span> <span class="operator">*</span>codec <span class="operator">=</span> <span class="type"><a href="qtextcodec.html">QTextCodec</a></span><span class="operator">::</span>codecForName(codecName);
|
|
action<span class="operator">-</span><span class="operator">></span>setVisible(codec <span class="operator">&</span><span class="operator">&</span> codec<span class="operator">-</span><span class="operator">></span>canEncode(currentText));
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> MainWindow<span class="operator">::</span>findCodecs()
|
|
{
|
|
<span class="type"><a href="qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type"><a href="qtextcodec.html">QTextCodec</a></span> <span class="operator">*</span><span class="operator">></span> codecMap;
|
|
<span class="type"><a href="qregexp.html">QRegExp</a></span> iso8859RegExp(<span class="string">"ISO[- ]8859-([0-9]+).*"</span>);
|
|
|
|
foreach (<span class="type">int</span> mib<span class="operator">,</span> <span class="type"><a href="qtextcodec.html">QTextCodec</a></span><span class="operator">::</span>availableMibs()) {
|
|
<span class="type"><a href="qtextcodec.html">QTextCodec</a></span> <span class="operator">*</span>codec <span class="operator">=</span> <span class="type"><a href="qtextcodec.html">QTextCodec</a></span><span class="operator">::</span>codecForMib(mib);
|
|
|
|
<span class="type"><a href="qstring.html">QString</a></span> sortKey <span class="operator">=</span> codec<span class="operator">-</span><span class="operator">></span>name()<span class="operator">.</span>toUpper();
|
|
<span class="type">int</span> rank;
|
|
|
|
<span class="keyword">if</span> (sortKey<span class="operator">.</span>startsWith(<span class="string">"UTF-8"</span>)) {
|
|
rank <span class="operator">=</span> <span class="number">1</span>;
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (sortKey<span class="operator">.</span>startsWith(<span class="string">"UTF-16"</span>)) {
|
|
rank <span class="operator">=</span> <span class="number">2</span>;
|
|
} <span class="keyword">else</span> <span class="keyword">if</span> (iso8859RegExp<span class="operator">.</span>exactMatch(sortKey)) {
|
|
<span class="keyword">if</span> (iso8859RegExp<span class="operator">.</span>cap(<span class="number">1</span>)<span class="operator">.</span>size() <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>)
|
|
rank <span class="operator">=</span> <span class="number">3</span>;
|
|
<span class="keyword">else</span>
|
|
rank <span class="operator">=</span> <span class="number">4</span>;
|
|
} <span class="keyword">else</span> {
|
|
rank <span class="operator">=</span> <span class="number">5</span>;
|
|
}
|
|
sortKey<span class="operator">.</span>prepend(<span class="type"><a href="qchar.html">QChar</a></span>(<span class="char">'0'</span> <span class="operator">+</span> rank));
|
|
|
|
codecMap<span class="operator">.</span>insert(sortKey<span class="operator">,</span> codec);
|
|
}
|
|
codecs <span class="operator">=</span> codecMap<span class="operator">.</span>values();
|
|
}
|
|
|
|
<span class="type">void</span> MainWindow<span class="operator">::</span>createActions()
|
|
{
|
|
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="qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Open);
|
|
connect(openAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(open()));
|
|
|
|
foreach (<span class="type"><a href="qtextcodec.html">QTextCodec</a></span> <span class="operator">*</span>codec<span class="operator">,</span> codecs) {
|
|
<span class="type"><a href="qstring.html">QString</a></span> text <span class="operator">=</span> tr(<span class="string">"%1..."</span>)<span class="operator">.</span>arg(<span class="type"><a href="qstring.html">QString</a></span>(codec<span class="operator">-</span><span class="operator">></span>name()));
|
|
|
|
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(text<span class="operator">,</span> <span class="keyword">this</span>);
|
|
action<span class="operator">-</span><span class="operator">></span>setData(codec<span class="operator">-</span><span class="operator">></span>name());
|
|
connect(action<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(save()));
|
|
saveAsActs<span class="operator">.</span>append(action);
|
|
}
|
|
|
|
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);
|
|
connect(exitAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close()));
|
|
|
|
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>);
|
|
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>);
|
|
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()
|
|
{
|
|
saveAsMenu <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(tr(<span class="string">"&Save As"</span>)<span class="operator">,</span> <span class="keyword">this</span>);
|
|
foreach (<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>action<span class="operator">,</span> saveAsActs)
|
|
saveAsMenu<span class="operator">-</span><span class="operator">></span>addAction(action);
|
|
connect(saveAsMenu<span class="operator">,</span> SIGNAL(aboutToShow())<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(aboutToShowSaveAsMenu()));
|
|
|
|
fileMenu <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(tr(<span class="string">"&File"</span>)<span class="operator">,</span> <span class="keyword">this</span>);
|
|
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(openAct);
|
|
fileMenu<span class="operator">-</span><span class="operator">></span>addMenu(saveAsMenu);
|
|
fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator();
|
|
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(exitAct);
|
|
|
|
helpMenu <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(tr(<span class="string">"&Help"</span>)<span class="operator">,</span> <span class="keyword">this</span>);
|
|
helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutAct);
|
|
helpMenu<span class="operator">-</span><span class="operator">></span>addAction(aboutQtAct);
|
|
|
|
menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(fileMenu);
|
|
menuBar()<span class="operator">-</span><span class="operator">></span>addSeparator();
|
|
menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(helpMenu);
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@tools/codecs/mainwindow.cpp -->
|
|
</div>
|
|
</div>
|
|
</div>
|
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|
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<span></span>
|
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|
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<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>
|
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<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
|
www.qt-project.org</a>.</p>
|
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<br />
|
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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of their respective owners. <a title="Privacy Policy"
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