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<h1 class="title">main.cpp Example File</h1>
<span class="subtitle">quickwidgets/quickwidget/main.cpp</span>
<!-- $$$quickwidgets/quickwidget/main.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2017 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 <QQuickWidget></span>
<span class="preprocessor">#include <QQuickItem></span>
<span class="preprocessor">#include <QQmlError></span>
<span class="preprocessor">#include <QtWidgets></span>
<span class="preprocessor">#include "fbitem.h"</span>
<span class="keyword">static</span> bool optMultipleSample <span class="operator">=</span> <span class="keyword">false</span>;
<span class="keyword">static</span> bool optCoreProfile <span class="operator">=</span> <span class="keyword">false</span>;
<span class="keyword">class</span> MainWindow : <span class="keyword">public</span> <span class="type">QMainWindow</span> {
Q_OBJECT
<span class="keyword">public</span>:
MainWindow();
<span class="keyword">private</span> <span class="keyword">slots</span>:
<span class="type">void</span> quickWidgetStatusChanged(<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>Status);
<span class="type">void</span> sceneGraphError(<span class="type"><a href="qquickwindow.html">QQuickWindow</a></span><span class="operator">::</span>SceneGraphError error<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>message);
<span class="type">void</span> grabFramebuffer();
<span class="type">void</span> renderToPixmap();
<span class="type">void</span> grabToImage();
<span class="type">void</span> createQuickWidgetsInTabs(<span class="type">QMdiArea</span> <span class="operator">*</span>mdiArea);
<span class="keyword">private</span>:
<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span> <span class="operator">*</span>m_quickWidget;
};
MainWindow<span class="operator">::</span>MainWindow()
: m_quickWidget(<span class="keyword">new</span> <span class="type"><a href="qquickwidget.html">QQuickWidget</a></span>)
{
<span class="type">QSurfaceFormat</span> format;
<span class="keyword">if</span> (optCoreProfile) {
format<span class="operator">.</span>setVersion(<span class="number">4</span><span class="operator">,</span> <span class="number">4</span>);
format<span class="operator">.</span>setProfile(<span class="type">QSurfaceFormat</span><span class="operator">::</span>CoreProfile);
}
<span class="keyword">if</span> (optMultipleSample)
format<span class="operator">.</span>setSamples(<span class="number">4</span>);
m_quickWidget<span class="operator">-</span><span class="operator">></span>setFormat(format);
<span class="type">QMdiArea</span> <span class="operator">*</span>centralWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QMdiArea</span>;
<span class="type">QLCDNumber</span> <span class="operator">*</span>lcd <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLCDNumber</span>;
lcd<span class="operator">-</span><span class="operator">></span>display(<span class="number">1337</span>);
lcd<span class="operator">-</span><span class="operator">></span>setMinimumSize(<span class="number">250</span><span class="operator">,</span><span class="number">100</span>);
centralWidget<span class="operator">-</span><span class="operator">></span>addSubWindow(lcd);
<span class="type">QUrl</span> source(<span class="string">"qrc:quickwidget/rotatingsquare.qml"</span>);
connect(m_quickWidget<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>statusChanged<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>quickWidgetStatusChanged);
connect(m_quickWidget<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>sceneGraphError<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>sceneGraphError);
m_quickWidget<span class="operator">-</span><span class="operator">></span>resize(<span class="number">300</span><span class="operator">,</span><span class="number">300</span>);
m_quickWidget<span class="operator">-</span><span class="operator">></span>setResizeMode(<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>SizeRootObjectToView );
m_quickWidget<span class="operator">-</span><span class="operator">></span>setSource(source);
centralWidget<span class="operator">-</span><span class="operator">></span>addSubWindow(m_quickWidget);
setCentralWidget(centralWidget);
<span class="type">QMenu</span> <span class="operator">*</span>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(tr(<span class="string">"Grab framebuffer"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>grabFramebuffer);
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Render to pixmap"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>renderToPixmap);
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Grab via grabToImage"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>grabToImage);
fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Quit"</span>)<span class="operator">,</span> qApp<span class="operator">,</span> <span class="operator">&</span><span class="type">QCoreApplication</span><span class="operator">::</span>quit);
<span class="type">QMenu</span> <span class="operator">*</span>windowMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Window"</span>));
windowMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Add tab widget"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span>
<span class="operator">[</span><span class="keyword">this</span><span class="operator">,</span> centralWidget<span class="operator">]</span> { createQuickWidgetsInTabs(centralWidget); });
}
<span class="type">void</span> MainWindow<span class="operator">::</span>createQuickWidgetsInTabs(<span class="type">QMdiArea</span> <span class="operator">*</span>mdiArea)
{
<span class="type">QTabWidget</span> <span class="operator">*</span>tabWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QTabWidget</span>;
<span class="keyword">const</span> <span class="type">QSize</span> size(<span class="number">400</span><span class="operator">,</span> <span class="number">400</span>);
<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span> <span class="operator">*</span>w <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qquickwidget.html">QQuickWidget</a></span>;
w<span class="operator">-</span><span class="operator">></span>resize(size);
w<span class="operator">-</span><span class="operator">></span>setResizeMode(<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>SizeRootObjectToView);
w<span class="operator">-</span><span class="operator">></span>setSource(<span class="type">QUrl</span>(<span class="string">"qrc:quickwidget/rotatingsquaretab.qml"</span>));
tabWidget<span class="operator">-</span><span class="operator">></span>addTab(w<span class="operator">,</span> tr(<span class="string">"Plain Quick content"</span>));
w <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qquickwidget.html">QQuickWidget</a></span>;
w<span class="operator">-</span><span class="operator">></span>resize(size);
w<span class="operator">-</span><span class="operator">></span>setResizeMode(<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>SizeRootObjectToView);
w<span class="operator">-</span><span class="operator">></span>setSource(<span class="type">QUrl</span>(<span class="string">"qrc:quickwidget/customgl.qml"</span>));
tabWidget<span class="operator">-</span><span class="operator">></span>addTab(w<span class="operator">,</span> tr(<span class="string">"Custom OpenGL drawing"</span>));
mdiArea<span class="operator">-</span><span class="operator">></span>addSubWindow(tabWidget);
tabWidget<span class="operator">-</span><span class="operator">></span>show();
}
<span class="type">void</span> MainWindow<span class="operator">::</span>quickWidgetStatusChanged(<span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>Status status)
{
<span class="keyword">if</span> (status <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qquickwidget.html">QQuickWidget</a></span><span class="operator">::</span>Error) {
<span class="type">QStringList</span> errors;
<span class="keyword">const</span> <span class="keyword">auto</span> widgetErrors <span class="operator">=</span> m_quickWidget<span class="operator">-</span><span class="operator">></span>errors();
<span class="keyword">for</span> (<span class="keyword">const</span> <span class="type">QQmlError</span> <span class="operator">&</span>error : widgetErrors)
errors<span class="operator">.</span>append(error<span class="operator">.</span>toString());
statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(errors<span class="operator">.</span>join(<span class="type">QStringLiteral</span>(<span class="string">", "</span>)));
}
}
<span class="type">void</span> MainWindow<span class="operator">::</span>sceneGraphError(<span class="type"><a href="qquickwindow.html">QQuickWindow</a></span><span class="operator">::</span>SceneGraphError<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>message)
{
statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(message);
}
<span class="keyword">template</span><span class="operator"><</span><span class="keyword">class</span> T<span class="operator">></span> <span class="type">void</span> saveToFile(<span class="type">QWidget</span> <span class="operator">*</span>parent<span class="operator">,</span> T <span class="operator">*</span>saveable)
{
<span class="type">QFileDialog</span> fd(parent);
fd<span class="operator">.</span>setAcceptMode(<span class="type">QFileDialog</span><span class="operator">::</span>AcceptSave);
fd<span class="operator">.</span>setDefaultSuffix(<span class="string">"png"</span>);
fd<span class="operator">.</span>selectFile(<span class="string">"test.png"</span>);
<span class="keyword">if</span> (fd<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type">QDialog</span><span class="operator">::</span>Accepted)
saveable<span class="operator">-</span><span class="operator">></span>save(fd<span class="operator">.</span>selectedFiles()<span class="operator">.</span>first());
}
<span class="type">void</span> MainWindow<span class="operator">::</span>grabFramebuffer()
{
<span class="type">QImage</span> image <span class="operator">=</span> m_quickWidget<span class="operator">-</span><span class="operator">></span>grabFramebuffer();
saveToFile(<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>image);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>renderToPixmap()
{
<span class="type">QPixmap</span> pixmap(m_quickWidget<span class="operator">-</span><span class="operator">></span>size());
m_quickWidget<span class="operator">-</span><span class="operator">></span>render(<span class="operator">&</span>pixmap);
saveToFile(<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>pixmap);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>grabToImage()
{
<span class="type">QFileDialog</span> fd(<span class="keyword">this</span>);
fd<span class="operator">.</span>setAcceptMode(<span class="type">QFileDialog</span><span class="operator">::</span>AcceptSave);
fd<span class="operator">.</span>setDefaultSuffix(<span class="string">"png"</span>);
fd<span class="operator">.</span>selectFile(<span class="string">"test_grabToImage.png"</span>);
<span class="keyword">if</span> (fd<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="type">QMetaObject</span><span class="operator">::</span>invokeMethod(m_quickWidget<span class="operator">-</span><span class="operator">></span>rootObject()<span class="operator">,</span> <span class="string">"performLayerBasedGrab"</span><span class="operator">,</span>
Q_ARG(<span class="type">QVariant</span><span class="operator">,</span> fd<span class="operator">.</span>selectedFiles()<span class="operator">.</span>first()));
}
}
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span><span class="operator">*</span>argv)
{
<span class="type">QApplication</span> app(argc<span class="operator">,</span> argv);
<span class="type">QCoreApplication</span><span class="operator">::</span>setApplicationName(<span class="string">"Qt QQuickWidget Example"</span>);
<span class="type">QCoreApplication</span><span class="operator">::</span>setOrganizationName(<span class="string">"QtProject"</span>);
<span class="type">QCoreApplication</span><span class="operator">::</span>setApplicationVersion(QT_VERSION_STR);
<span class="type">QCommandLineParser</span> parser;
parser<span class="operator">.</span>setApplicationDescription(<span class="type">QCoreApplication</span><span class="operator">::</span>applicationName());
parser<span class="operator">.</span>addHelpOption();
parser<span class="operator">.</span>addVersionOption();
<span class="type">QCommandLineOption</span> multipleSampleOption(<span class="string">"multisample"</span><span class="operator">,</span> <span class="string">"Multisampling"</span>);
parser<span class="operator">.</span>addOption(multipleSampleOption);
<span class="type">QCommandLineOption</span> coreProfileOption(<span class="string">"coreprofile"</span><span class="operator">,</span> <span class="string">"Use core profile"</span>);
parser<span class="operator">.</span>addOption(coreProfileOption);
parser<span class="operator">.</span>process(app);
optMultipleSample <span class="operator">=</span> parser<span class="operator">.</span>isSet(multipleSampleOption);
optCoreProfile <span class="operator">=</span> parser<span class="operator">.</span>isSet(coreProfileOption);
qmlRegisterType<span class="operator"><</span>FbItem<span class="operator">></span>(<span class="string">"QuickWidgetExample"</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="string">"FbItem"</span>);
MainWindow mainWindow;
mainWindow<span class="operator">.</span>show();
<span class="keyword">return</span> app<span class="operator">.</span>exec();
}
<span class="preprocessor">#include "main.moc"</span>
</pre>
</div>
<!-- @@@quickwidgets/quickwidget/main.cpp -->
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<acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
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distrib
>
Mageia
>
7
>
i586
>
media
>
core-updates
>
by-pkgid
>
6e2327ca1c896c6d674ae53117299f21
>
files
>
1601
