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<h1 class="title">printhandler.cpp Example File</h1>
<span class="subtitle">webenginewidgets/printme/printhandler.cpp</span>
<!-- $$$webenginewidgets/printme/printhandler.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2018 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.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include "printhandler.h"</span>
<span class="preprocessor">#include <QEventLoop></span>
<span class="preprocessor">#include <QPrintDialog></span>
<span class="preprocessor">#include <QPrinter></span>
<span class="preprocessor">#include <QPainter></span>
<span class="preprocessor">#include <QPrintPreviewDialog></span>
<span class="preprocessor">#include <QWebEnginePage></span>
PrintHandler<span class="operator">::</span>PrintHandler(<span class="type">QObject</span> <span class="operator">*</span>parent)
: <span class="type">QObject</span>(parent)
{
}
<span class="type">void</span> PrintHandler<span class="operator">::</span>setPage(<span class="type"><a href="qwebenginepage.html">QWebEnginePage</a></span> <span class="operator">*</span>page)
{
Q_ASSERT(<span class="operator">!</span>m_page);
m_page <span class="operator">=</span> page;
connect(m_page<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qwebenginepage.html">QWebEnginePage</a></span><span class="operator">::</span>printRequested<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>PrintHandler<span class="operator">::</span>printPreview);
}
<span class="type">void</span> PrintHandler<span class="operator">::</span>print()
{
<span class="type">QPrinter</span> printer(<span class="type">QPrinter</span><span class="operator">::</span>HighResolution);
<span class="type">QPrintDialog</span> dialog(<span class="operator">&</span>printer<span class="operator">,</span> m_page<span class="operator">-</span><span class="operator">></span>view());
<span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">!</span><span class="operator">=</span> <span class="type">QDialog</span><span class="operator">::</span>Accepted)
<span class="keyword">return</span>;
printDocument(<span class="operator">&</span>printer);
}
<span class="type">void</span> PrintHandler<span class="operator">::</span>printDocument(<span class="type">QPrinter</span> <span class="operator">*</span>printer)
{
<span class="type">QEventLoop</span> loop;
bool result;
<span class="keyword">auto</span> printPreview <span class="operator">=</span> <span class="operator">[</span><span class="operator">&</span><span class="operator">]</span>(bool success) { result <span class="operator">=</span> success; loop<span class="operator">.</span>quit(); };
m_page<span class="operator">-</span><span class="operator">></span>print(printer<span class="operator">,</span> std<span class="operator">::</span>move(printPreview));
loop<span class="operator">.</span>exec();
<span class="keyword">if</span> (<span class="operator">!</span>result) {
<span class="type">QPainter</span> painter;
<span class="keyword">if</span> (painter<span class="operator">.</span>begin(printer)) {
<span class="type">QFont</span> font <span class="operator">=</span> painter<span class="operator">.</span>font();
font<span class="operator">.</span>setPixelSize(<span class="number">20</span>);
painter<span class="operator">.</span>setFont(font);
painter<span class="operator">.</span>drawText(<span class="type">QPointF</span>(<span class="number">10</span><span class="operator">,</span><span class="number">25</span>)<span class="operator">,</span>
<span class="type">QStringLiteral</span>(<span class="string">"Could not generate print preview."</span>));
painter<span class="operator">.</span>end();
}
}
}
<span class="type">void</span> PrintHandler<span class="operator">::</span>printPreview()
{
<span class="keyword">if</span> (<span class="operator">!</span>m_page)
<span class="keyword">return</span>;
<span class="keyword">if</span> (m_inPrintPreview)
<span class="keyword">return</span>;
m_inPrintPreview <span class="operator">=</span> <span class="keyword">true</span>;
<span class="type">QPrinter</span> printer;
<span class="type">QPrintPreviewDialog</span> preview(<span class="operator">&</span>printer<span class="operator">,</span> m_page<span class="operator">-</span><span class="operator">></span>view());
connect(<span class="operator">&</span>preview<span class="operator">,</span> <span class="operator">&</span><span class="type">QPrintPreviewDialog</span><span class="operator">::</span>paintRequested<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>PrintHandler<span class="operator">::</span>printDocument);
preview<span class="operator">.</span>exec();
m_inPrintPreview <span class="operator">=</span> <span class="keyword">false</span>;
}
</pre>
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<!-- @@@webenginewidgets/printme/printhandler.cpp -->
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<acronym title="Copyright">©</acronym> 2019 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
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distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-updates
>
by-pkgid
>
433eb9daba9f45efee96fd578b74d021
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files
>
391
