qmlcamera.cpp Example File

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 #include <QtGui/QApplication>
 #include <QtGui/QDesktopWidget>
 #include <QtDeclarative/QDeclarativeView>
 #include <QtDeclarative/QDeclarativeEngine>

 #if !defined(QT_NO_OPENGL)
 #include <QtOpenGL/QGLWidget>
 #endif

 #ifdef Q_OS_SYMBIAN
 #include "camerakeyevent_symbian.h"
 #endif // Q_OS_SYMBIAN

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

 #if defined (Q_WS_X11) || defined (Q_WS_MAC) || defined (Q_OS_SYMBIAN)
     //### default to using raster graphics backend for now
     bool gsSpecified = false;
     for (int i = 0; i < argc; ++i) {
         QString arg = argv[i];
         if (arg == "-graphicssystem") {
             gsSpecified = true;
             break;
         }
     }

     if (!gsSpecified)
         QApplication::setGraphicsSystem("raster");
 #endif

     QApplication application(argc, argv);
     const QString mainQmlApp = QLatin1String("qrc:/declarative-camera.qml");
     QDeclarativeView view;
 #if !defined(QT_NO_OPENGL) && !defined(Q_WS_MAEMO_5) && !defined(Q_WS_S60)
     view.setViewport(new QGLWidget);
 #endif
     view.setSource(QUrl(mainQmlApp));
     view.setResizeMode(QDeclarativeView::SizeRootObjectToView);
     // Qt.quit() called in embedded .qml by default only emits
     // quit() signal, so do this (optionally use Qt.exit()).
     QObject::connect(view.engine(), SIGNAL(quit()), qApp, SLOT(quit()));
 #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
     view.setGeometry(application.desktop()->screenGeometry());
     view.showFullScreen();
 #ifdef Q_OS_SYMBIAN
     new QSymbianCameraKeyListener(&view);
 #endif // Q_OS_SYMBIAN
 #else
     view.setGeometry(QRect(100, 100, 800, 480));
     view.show();
 #endif
     return application.exec();
 }