main.cpp Example File

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 #include <QtGui/QApplication>
 #include <QDesktopWidget>
 #include "mainwindow.h"

 // Lock S60 orientation
 #ifdef Q_OS_SYMBIAN
 #include <eikenv.h>
 #include <eikappui.h>
 #include <aknenv.h>
 #include <aknappui.h>
 #endif

 #ifndef QT_NO_OPENGL
     #include <QGLWidget>
 #endif

 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);

     // Lock S60 orientation
 #ifdef Q_OS_SYMBIAN
     CAknAppUi* appUi = dynamic_cast<CAknAppUi*> (CEikonEnv::Static()->AppUi());
     TRAPD(error,
     if (appUi) {
         appUi->SetOrientationL(CAknAppUi::EAppUiOrientationPortrait);
     }
     );
 #endif

     MainWindow w;

 #ifndef QT_NO_OPENGL
     // Use QGLWidget to get the opengl support if available
     QGLFormat format = QGLFormat::defaultFormat();
     format.setSampleBuffers(false);

     QGLWidget *glWidget = new QGLWidget(format);
     glWidget->setAutoFillBackground(false);
     w.setViewport(glWidget);     // ownership of glWidget is taken
 #endif

     QObject *rootObject = dynamic_cast<QObject*>(w.rootObject());

     // For Qt.exit() from QML
     QObject::connect((QObject*)w.engine(), SIGNAL(quit()), &a, SLOT(quit()));
     // Level activation signal from QML
     QObject::connect(rootObject, SIGNAL(levelActivated(int)), &w, SLOT(levelActivated(int)));

 #if defined (Q_OS_SYMBIAN) || defined (Q_WS_MAEMO_5)
     w.setGeometry(QApplication::desktop()->screenGeometry());
     w.showFullScreen();
 #else
     w.setGeometry(100,100,360,640);
     w.setFixedSize(360,640);
     w.show();
 #endif

     return a.exec();
 }