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<h1 class="title">mainwindow.cpp Example File</h1>
<span class="small-subtitle">webkit/previewer/mainwindow.cpp</span>
<!-- $$$webkit/previewer/mainwindow.cpp-description -->
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<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:
**
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** met:
** * Redistributions of source code must retain the above copyright
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** the documentation and/or other materials provided with the
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** $QT_END_LICENSE$
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****************************************************************************/</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &lt;QtWebKit&gt;</span>
<span class="preprocessor">#include &quot;mainwindow.h&quot;</span>
MainWindow<span class="operator">::</span>MainWindow()
{
createActions();
createMenus();
centralWidget <span class="operator">=</span> <span class="keyword">new</span> Previewer(<span class="keyword">this</span>);
setCentralWidget(centralWidget);
connect(centralWidget<span class="operator">-</span><span class="operator">&gt;</span>webView<span class="operator">,</span> SIGNAL(loadFinished(<span class="type">bool</span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(updateTextEdit()));
setStartupText();
}
<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">&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 HTML 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()));
openUrlAct <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 URL...&quot;</span>)<span class="operator">,</span> <span class="keyword">this</span>);
openUrlAct<span class="operator">-</span><span class="operator">&gt;</span>setShortcut(tr(<span class="string">&quot;Ctrl+U&quot;</span>));
openUrlAct<span class="operator">-</span><span class="operator">&gt;</span>setStatusTip(tr(<span class="string">&quot;Open a URL&quot;</span>));
connect(openUrlAct<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(openUrl()));
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 HTML file 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()));
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>setStatusTip(tr(<span class="string">&quot;Exit the application&quot;</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);
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">&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()));
}
<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(openAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(openUrlAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(saveAct);
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addSeparator();
fileMenu<span class="operator">-</span><span class="operator">&gt;</span>addAction(exitAct);
menuBar()<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);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>about()
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;About Previewer&quot;</span>)<span class="operator">,</span>
tr(<span class="string">&quot;The &lt;b&gt;Previewer&lt;/b&gt; example demonstrates how to &quot;</span>
<span class="string">&quot;view HTML documents using a QWebView.&quot;</span>));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>open()
{
<span class="type"><a href="qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span>);
<span class="keyword">if</span> (<span class="operator">!</span>fileName<span class="operator">.</span>isEmpty()) {
<span class="comment">// read from file</span>
<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="qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly)) {
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Unable to open file&quot;</span>)<span class="operator">,</span>
file<span class="operator">.</span>errorString());
<span class="keyword">return</span>;
}
<span class="type"><a href="qtextstream.html">QTextStream</a></span> out(<span class="operator">&amp;</span>file);
<span class="type"><a href="qstring.html">QString</a></span> output <span class="operator">=</span> out<span class="operator">.</span>readAll();
<span class="comment">// display contents</span>
centralWidget<span class="operator">-</span><span class="operator">&gt;</span>plainTextEdit<span class="operator">-</span><span class="operator">&gt;</span>setPlainText(output);
centralWidget<span class="operator">-</span><span class="operator">&gt;</span>setBaseUrl(<span class="type"><a href="qurl.html">QUrl</a></span><span class="operator">::</span>fromLocalFile(fileName));
}
}
<span class="type">void</span> MainWindow<span class="operator">::</span>openUrl()
{
<span class="type">bool</span> ok;
<span class="type"><a href="qstring.html">QString</a></span> url <span class="operator">=</span> <span class="type"><a href="qinputdialog.html">QInputDialog</a></span><span class="operator">::</span>getText(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Enter a URL&quot;</span>)<span class="operator">,</span>
tr(<span class="string">&quot;URL:&quot;</span>)<span class="operator">,</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">::</span>Normal<span class="operator">,</span> <span class="string">&quot;http://&quot;</span><span class="operator">,</span> <span class="operator">&amp;</span>ok);
<span class="keyword">if</span> (ok <span class="operator">&amp;</span><span class="operator">&amp;</span> <span class="operator">!</span>url<span class="operator">.</span>isEmpty()) {
centralWidget<span class="operator">-</span><span class="operator">&gt;</span>webView<span class="operator">-</span><span class="operator">&gt;</span>setUrl(url);
}
}
<span class="type">void</span> MainWindow<span class="operator">::</span>save()
{
<span class="type"><a href="qstring.html">QString</a></span> content <span class="operator">=</span> centralWidget<span class="operator">-</span><span class="operator">&gt;</span>plainTextEdit<span class="operator">-</span><span class="operator">&gt;</span>toPlainText();
<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="comment">// save to file</span>
<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="qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly)) {
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Unable to open file&quot;</span>)<span class="operator">,</span>
file<span class="operator">.</span>errorString());
<span class="keyword">return</span>;
}
<span class="type"><a href="qtextstream.html">QTextStream</a></span> in(<span class="operator">&amp;</span>file);
in <span class="operator">&lt;</span><span class="operator">&lt;</span> content;
}
}
<span class="type">void</span> MainWindow<span class="operator">::</span>updateTextEdit()
{
<span class="type"><a href="qwebframe.html">QWebFrame</a></span> <span class="operator">*</span>mainFrame <span class="operator">=</span> centralWidget<span class="operator">-</span><span class="operator">&gt;</span>webView<span class="operator">-</span><span class="operator">&gt;</span>page()<span class="operator">-</span><span class="operator">&gt;</span>mainFrame();
<span class="type"><a href="qstring.html">QString</a></span> frameText <span class="operator">=</span> mainFrame<span class="operator">-</span><span class="operator">&gt;</span>toHtml();
centralWidget<span class="operator">-</span><span class="operator">&gt;</span>plainTextEdit<span class="operator">-</span><span class="operator">&gt;</span>setPlainText(frameText);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>setStartupText()
{
<span class="type"><a href="qstring.html">QString</a></span> string <span class="operator">=</span> <span class="string">&quot;&lt;html&gt;&lt;body&gt;&lt;h1&gt;HTML Previewer&lt;/h1&gt;&quot;</span>
<span class="string">&quot; &lt;p&gt;This example shows you how to use QWebView to&quot;</span>
<span class="string">&quot; preview HTML data written in a QPlainTextEdit.&lt;/p&gt;&quot;</span>
<span class="string">&quot; &lt;/body&gt;&lt;/html&gt;&quot;</span>;
centralWidget<span class="operator">-</span><span class="operator">&gt;</span>webView<span class="operator">-</span><span class="operator">&gt;</span>setHtml(string);
}</pre>
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<!-- @@@webkit/previewer/mainwindow.cpp -->
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