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<h1 class="title">mainwindow.cpp Example File</h1>
<span class="small-subtitle">demos/mobile/quickhit/mainwindow.cpp</span>
<!-- $$$demos/mobile/quickhit/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 QtDeclarative module 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 &quot;mainwindow.h&quot;</span>
<span class="preprocessor">#include &quot;gameengine.h&quot;</span>
<span class="preprocessor">#include &quot;plugins/levelplugininterface.h&quot;</span>
<span class="preprocessor">#include &lt;QDebug&gt;</span>
<span class="preprocessor">#include &lt;QDir&gt;</span>
<span class="preprocessor">#include &lt;QMessageBox&gt;</span>
<span class="preprocessor">#include &lt;QLibraryInfo&gt;</span>
<span class="preprocessor">#include &lt;QDeclarativeEngine&gt;</span>
<span class="preprocessor">#include &lt;QDesktopWidget&gt;</span>
MainWindow<span class="operator">::</span>MainWindow(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qdeclarativeview.html">QDeclarativeView</a></span>(parent)
{
<span class="preprocessor">#ifdef Q_WS_MAEMO_5</span>
window()<span class="operator">-</span><span class="operator">&gt;</span>setAttribute(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WA_Maemo5PortraitOrientation<span class="operator">,</span> <span class="keyword">true</span>);
<span class="preprocessor">#endif</span>
<span class="comment">// Game engine</span>
m_gameEngine <span class="operator">=</span> <span class="keyword">new</span> GameEngine(<span class="keyword">this</span>);
<span class="comment">// Load all levels plugins</span>
m_levelPlugin <span class="operator">=</span> <span class="number">0</span>;
loadLevelPlugins();
<span class="comment">// QML main window</span>
engine()<span class="operator">-</span><span class="operator">&gt;</span>addImportPath(<span class="string">&quot;./imports&quot;</span>);
setResizeMode(<span class="type"><a href="qdeclarativeview.html">QDeclarativeView</a></span><span class="operator">::</span>SizeRootObjectToView);
<span class="comment">// Set game engine visible to QML</span>
rootContext()<span class="operator">-</span><span class="operator">&gt;</span>setContextProperty(<span class="string">&quot;GameEngine&quot;</span><span class="operator">,</span> m_gameEngine);
<span class="comment">// Set QML source</span>
setSource(<span class="type"><a href="qurl.html">QUrl</a></span>(<span class="string">&quot;qrc:/Game.qml&quot;</span>));
<span class="comment">//setSource(QUrl(&quot;../QuickHit/Game.qml&quot;));</span>
<span class="comment">// Store QML root object for game engine</span>
<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>ro <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="type"><a href="qobject.html">QObject</a></span><span class="operator">*</span><span class="operator">&gt;</span>(rootObject());
m_gameEngine<span class="operator">-</span><span class="operator">&gt;</span>setGameQml(ro);
m_gameEngine<span class="operator">-</span><span class="operator">&gt;</span>findQmlObjects();
<span class="comment">// Application foreground / background event filter for filterin incoming call (window)</span>
<span class="comment">// when game will be paused</span>
m_eventFilter <span class="operator">=</span> <span class="keyword">new</span> MyEventFilter(<span class="keyword">this</span>);
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>connect(m_eventFilter<span class="operator">,</span>SIGNAL(activationChangeFiltered())<span class="operator">,</span><span class="keyword">this</span><span class="operator">,</span>SLOT(activationChangeFiltered()));
qApp<span class="operator">-</span><span class="operator">&gt;</span>installEventFilter(m_eventFilter);
<span class="comment">// Remove context menu from the all widgets</span>
<span class="type"><a href="qwidget.html#QWidgetList-typedef">QWidgetList</a></span> widgets <span class="operator">=</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>allWidgets();
<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">*</span> w <span class="operator">=</span> <span class="number">0</span>;
foreach (w<span class="operator">,</span>widgets){
w<span class="operator">-</span><span class="operator">&gt;</span>setContextMenuPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoContextMenu);
}
}
MainWindow<span class="operator">::</span><span class="operator">~</span>MainWindow()
{
<span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>;i<span class="operator">&lt;</span>m_plugins<span class="operator">.</span>count();i<span class="operator">+</span><span class="operator">+</span>) {
m_plugins<span class="operator">[</span>i<span class="operator">]</span><span class="operator">-</span><span class="operator">&gt;</span>unload();
}
m_plugins<span class="operator">.</span>clear();
}
<span class="type">void</span> MainWindow<span class="operator">::</span>activationChangeFiltered()
{
m_gameEngine<span class="operator">-</span><span class="operator">&gt;</span>pauseGame();
}
<span class="type">void</span> MainWindow<span class="operator">::</span>levelActivated(<span class="type">int</span> index)
{
<span class="comment">// Set level for the game engine</span>
createPlugin(index);
rootContext()<span class="operator">-</span><span class="operator">&gt;</span>setContextProperty(<span class="string">&quot;LevelPlugin&quot;</span><span class="operator">,</span> m_levelPlugin);
m_gameEngine<span class="operator">-</span><span class="operator">&gt;</span>setGameLevel(m_levelPlugin);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>loadLevelPlugins()
{
<span class="preprocessor">#if defined (Q_OS_SYMBIAN)</span>
<span class="type">bool</span> exists_c <span class="operator">=</span> loadPlugins(<span class="string">&quot;c&quot;</span><span class="operator">,</span> <span class="string">&quot;quickhitlevels&quot;</span>);
<span class="type">bool</span> exists_e <span class="operator">=</span> loadPlugins(<span class="string">&quot;e&quot;</span><span class="operator">,</span> <span class="string">&quot;quickhitlevels&quot;</span>);
<span class="type">bool</span> exists_f <span class="operator">=</span> loadPlugins(<span class="string">&quot;f&quot;</span><span class="operator">,</span> <span class="string">&quot;quickhitlevels&quot;</span>);
<span class="keyword">if</span> (exists_c <span class="operator">|</span><span class="operator">|</span> exists_e <span class="operator">|</span><span class="operator">|</span> exists_f) {
m_gameEngine<span class="operator">-</span><span class="operator">&gt;</span>setPluginList(m_plugins);
createPlugin();
}
<span class="keyword">else</span> {
<span class="comment">//QMessageBox::information(this, &quot;QuickHit&quot;, &quot;Could not load any of the quickhitlevels&quot;);</span>
}
<span class="preprocessor">#else</span>
<span class="keyword">if</span> (loadPlugins(<span class="string">&quot;c&quot;</span><span class="operator">,</span> <span class="string">&quot;quickhitlevels&quot;</span>)) {
m_gameEngine<span class="operator">-</span><span class="operator">&gt;</span>setPluginList(m_plugins);
createPlugin();
}
<span class="keyword">else</span> {
<span class="comment">//QMessageBox::information(this, &quot;QuickHit&quot;, &quot;Could not load any of the quickhitlevels&quot;);</span>
}
<span class="preprocessor">#endif</span>
}
<span class="type">bool</span> MainWindow<span class="operator">::</span>loadPlugins(<span class="type"><a href="qstring.html">QString</a></span> drive<span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span> pluginDir)
{
<span class="preprocessor">#if defined (Q_OS_SYMBIAN)</span>
<span class="type"><a href="qdir.html">QDir</a></span> pluginsDir(drive <span class="operator">+</span> <span class="string">&quot;:&quot;</span> <span class="operator">+</span> <span class="type"><a href="qlibraryinfo.html">QLibraryInfo</a></span><span class="operator">::</span>location(<span class="type"><a href="qlibraryinfo.html">QLibraryInfo</a></span><span class="operator">::</span>PluginsPath));
<span class="preprocessor">#elif defined Q_OS_WIN32</span>
<span class="type"><a href="qdir.html">QDir</a></span> pluginsDir <span class="operator">=</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>currentPath();
<span class="preprocessor">#else</span>
<span class="type"><a href="qdir.html">QDir</a></span> pluginsDir(<span class="type"><a href="qlibraryinfo.html">QLibraryInfo</a></span><span class="operator">::</span>location(<span class="type"><a href="qlibraryinfo.html">QLibraryInfo</a></span><span class="operator">::</span>PluginsPath));
<span class="preprocessor">#endif</span>
pluginsDir<span class="operator">.</span>cd(pluginDir);
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Loads plugins from : &quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> pluginsDir<span class="operator">.</span>path();
<span class="type">bool</span> newPluginsLoaded <span class="operator">=</span> <span class="keyword">false</span>;
foreach (<span class="type"><a href="qstring.html">QString</a></span> fileName<span class="operator">,</span> pluginsDir<span class="operator">.</span>entryList(<span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Files))
{
<span class="comment">// Accept only plugin files</span>
<span class="preprocessor">#if defined (Q_OS_SYMBIAN)</span>
<span class="keyword">if</span> (fileName<span class="operator">.</span>contains(<span class="string">&quot;.qtplugin&quot;</span><span class="operator">,</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CaseInsensitive)) {
<span class="preprocessor">#elif defined (Q_WS_MAEMO_5)</span>
<span class="keyword">if</span> (fileName<span class="operator">.</span>contains(<span class="string">&quot;.so&quot;</span><span class="operator">,</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CaseInsensitive)) {
<span class="preprocessor">#else</span>
<span class="keyword">if</span> (fileName<span class="operator">.</span>contains(<span class="string">&quot;.dll&quot;</span><span class="operator">,</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>CaseInsensitive)) {
<span class="preprocessor">#endif</span>
<span class="comment">// Create plugin loader</span>
<span class="type"><a href="qpluginloader.html">QPluginLoader</a></span><span class="operator">*</span> pluginLoader <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpluginloader.html">QPluginLoader</a></span>(pluginsDir<span class="operator">.</span>absoluteFilePath(fileName));
<span class="comment">// Load plugin</span>
<span class="type">bool</span> ret <span class="operator">=</span> pluginLoader<span class="operator">-</span><span class="operator">&gt;</span>load();
<span class="keyword">if</span> (<span class="operator">!</span>ret) {
<span class="comment">// Loading failed</span>
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Could not load plugin &quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> fileName;
} <span class="keyword">else</span> {
<span class="comment">// Loading done</span>
<span class="comment">// Test creating plugin</span>
<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>plugin <span class="operator">=</span> <span class="number">0</span>;
LevelPluginInterface<span class="operator">*</span> pluginIF <span class="operator">=</span> <span class="number">0</span>;
plugin <span class="operator">=</span> pluginLoader<span class="operator">-</span><span class="operator">&gt;</span>instance();
pluginIF <span class="operator">=</span> qobject_cast<span class="operator">&lt;</span>LevelPluginInterface<span class="operator">*</span><span class="operator">&gt;</span> (plugin);
<span class="keyword">if</span> (pluginIF) {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Plugin can be created&quot;</span>;
<span class="comment">// Store loader to array</span>
m_plugins<span class="operator">.</span>append(pluginLoader);
newPluginsLoaded <span class="operator">=</span> <span class="keyword">true</span>;
} <span class="keyword">else</span> {
pluginLoader<span class="operator">-</span><span class="operator">&gt;</span>unload();
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Plugin can NOT be created!&quot;</span>;
}
}
}
}
<span class="keyword">return</span> newPluginsLoaded;
}
<span class="type">void</span> MainWindow<span class="operator">::</span>createPlugin(<span class="type">int</span> index)
{
<span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) {
<span class="keyword">return</span>;
}
m_levelPlugin <span class="operator">=</span> <span class="number">0</span>;
<span class="comment">// Try to create plugin instance</span>
<span class="type"><a href="qpluginloader.html">QPluginLoader</a></span><span class="operator">*</span> pluginLoader <span class="operator">=</span> m_plugins<span class="operator">[</span>index<span class="operator">]</span>;
<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>plugin <span class="operator">=</span> pluginLoader<span class="operator">-</span><span class="operator">&gt;</span>instance();
<span class="keyword">if</span> (plugin) {
<span class="comment">// Plugin instance created</span>
<span class="comment">// Cast plugin to LevelPluginInterface, that is common for all plugins</span>
LevelPluginInterface<span class="operator">*</span> pluginIF <span class="operator">=</span> qobject_cast<span class="operator">&lt;</span>LevelPluginInterface<span class="operator">*</span><span class="operator">&gt;</span> (plugin);
m_levelPlugin <span class="operator">=</span> pluginIF;
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Plugin created: &quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> index;
}
<span class="keyword">else</span> {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Creating plugin failed!&quot;</span>;
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> <span class="string">&quot;QuickHit&quot;</span><span class="operator">,</span> <span class="string">&quot;Could not create quickhitlevels&quot;</span>);
}
}
<span class="type">void</span> MainWindow<span class="operator">::</span>printObjectTree(<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">*</span> parent)
{
<span class="keyword">if</span> (parent) {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;className:&quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> parent<span class="operator">-</span><span class="operator">&gt;</span>metaObject()<span class="operator">-</span><span class="operator">&gt;</span>className();
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;objectName:&quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> parent<span class="operator">-</span><span class="operator">&gt;</span>objectName();
<span class="type"><a href="qobject.html#QObjectList-typedef">QObjectList</a></span> list <span class="operator">=</span> parent<span class="operator">-</span><span class="operator">&gt;</span>children();
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">*</span> item;
foreach (item<span class="operator">,</span>list) {
<span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">&gt;</span>children()<span class="operator">.</span>count()<span class="operator">&gt;</span><span class="number">0</span>) {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;--Childrens found--&quot;</span>;
printObjectTree(item);
} <span class="keyword">else</span> {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;className:&quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> item<span class="operator">-</span><span class="operator">&gt;</span>metaObject()<span class="operator">-</span><span class="operator">&gt;</span>className();
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;objectName:&quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> item<span class="operator">-</span><span class="operator">&gt;</span>objectName();
}
}
} <span class="keyword">else</span> {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;object NULL&quot;</span>;
}
}</pre>
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<!-- @@@demos/mobile/quickhit/mainwindow.cpp -->
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