main.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/
 **
 ** This file is part of the Qt Mobility Components.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** GNU Lesser General Public License Usage
 ** This file may be used under the terms of the GNU Lesser General Public
 ** License version 2.1 as published by the Free Software Foundation and
 ** appearing in the file LICENSE.LGPL included in the packaging of this
 ** file. Please review the following information to ensure the GNU Lesser
 ** General Public License version 2.1 requirements will be met:
 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights. These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU General
 ** Public License version 3.0 as published by the Free Software Foundation
 ** and appearing in the file LICENSE.GPL included in the packaging of this
 ** file. Please review the following information to ensure the GNU General
 ** Public License version 3.0 requirements will be met:
 ** http://www.gnu.org/copyleft/gpl.html.
 **
 ** Other Usage
 ** Alternatively, this file may be used in accordance with the terms and
 ** conditions contained in a signed written agreement between you and Nokia.
 **
 **
 **
 **
 **
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtCore/QStandardPaths>
 #include <QtCore/QStringList>
 #include <QtQml/QQmlContext>
 #include <QtGui/QGuiApplication>
 #include <QtQuick/QQuickItem>
 #include "filereader.h"
 #include "qmlapplicationviewer.h"
 #include "trace.h"

 #ifdef SMALL_SCREEN_LAYOUT
     static const QLatin1String MainQmlFile("main-smallscreen.qml");
 #else
     static const QLatin1String MainQmlFile("main-largescreen.qml");
 #endif

 #ifdef PERFORMANCEMONITOR_SUPPORT
 #include "performancemonitordeclarative.h"
 #endif

 int main(int argc, char *argv[])
 {
     QGuiApplication app(argc, argv);

 #ifdef PERFORMANCEMONITOR_SUPPORT
     PerformanceMonitor::qmlRegisterTypes();
 #endif

     QUrl fileName;
     qreal volume = 0.5;
     QStringList args = app.arguments();
 #ifdef PERFORMANCEMONITOR_SUPPORT
     PerformanceMonitor::State performanceMonitorState;
 #endif
     for (int i=1; i<args.count(); ++i) {
         const QString &arg = args.at(i);
         if (arg.startsWith('-')) {
             if ("-volume" == arg) {
                 if (i+1 < args.count())
                     volume = 0.01 * args.at(++i).toInt();
                 else
                     qtTrace() << "Option \"-volume\" takes a value";
             }
 #ifdef PERFORMANCEMONITOR_SUPPORT
             else if (PerformanceMonitor::parseArgument(arg, performanceMonitorState)) {
                 // Do nothing
             }
 #endif
             else {
                 qtTrace() << "Option" << arg << "ignored";
             }
         } else {
             if (fileName.isEmpty())
                 fileName = QUrl::fromLocalFile(arg);
             else
                 qtTrace() << "Argument" << arg << "ignored";
         }
     }

     QmlApplicationViewer viewer;

     viewer.requestWindowOrientation(Qt::LandscapeOrientation);
     viewer.setMainQmlFile(QLatin1String("qml/qmlvideofx/") + MainQmlFile);
     QQuickItem *rootObject = viewer.rootObject();
     rootObject->setProperty("fileName", fileName);
     viewer.rootObject()->setProperty("volume", volume);

 #ifdef PERFORMANCEMONITOR_SUPPORT
     if (performanceMonitorState.valid) {
         rootObject->setProperty("perfMonitorsLogging", performanceMonitorState.logging);
         rootObject->setProperty("perfMonitorsVisible", performanceMonitorState.visible);
     }
     QObject::connect(&viewer, SIGNAL(afterRendering()),
                      rootObject, SLOT(qmlFramePainted()));
 #endif

     FileReader fileReader;
     viewer.rootContext()->setContextProperty("fileReader", &fileReader);

     QString imagePath = "../../images";
     const QStringList picturesLocation = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation);
     if (!picturesLocation.isEmpty())
         imagePath = picturesLocation.first();
     viewer.rootContext()->setContextProperty("imagePath", imagePath);

     QString videoPath;
     const QStringList moviesLocation = QStandardPaths::standardLocations(QStandardPaths::MoviesLocation);
     if (!moviesLocation.isEmpty())
         videoPath = moviesLocation.first();
     viewer.rootContext()->setContextProperty("videoPath", videoPath);

     viewer.setWindowTitle("qmlvideofx");
     viewer.setWindowFlags(Qt::Window | Qt::WindowSystemMenuHint | Qt::WindowTitleHint |
                           Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
     viewer.setMinimumSize(QSize(600, 400));

 #ifdef SMALL_SCREEN_PHYSICAL
     viewer.showFullScreen();
 #else
     viewer.showExpanded();
 #endif

     // Delay invocation of init until the event loop has started, to work around
     // a GL context issue on Harmattan: without this, we get the following error
     // when the first ShaderEffectItem is created:
     // "QGLShaderProgram::addShader: Program and shader are not associated with same context"
     QMetaObject::invokeMethod(viewer.rootObject(), "init", Qt::QueuedConnection);

     return app.exec();
 }