Qt Reference Documentation

# main.cpp Example File

demos/mobile/qcamera/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
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     ** This file is part of the demonstration applications of the Qt Toolkit.
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     **
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     #include "cameraexample.h"

     #include <QtGui>
     #include <QApplication>
     #include <QDebug>

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

     #ifdef Q_OS_SYMBIAN
     #include <QSymbianEvent>
     #include <w32std.h>

     #endif

     static const int KGoomMemoryLowEvent = 0x10282DBF;
     static const int KGoomMemoryGoodEvent = 0x20026790;

     class MyApplication : public QApplication
     {
     public:
       MyApplication( int argc, char** argv ) : QApplication( argc, argv ) {}

     #ifdef Q_OS_SYMBIAN
     protected:
       bool symbianEventFilter( const QSymbianEvent* symbianEvent )
       {
         const TWsEvent *event = symbianEvent->windowServerEvent();
         if ( !event ) {
           return false;
         }
         switch ( event->Type() ) {
           // GOOM handling enabled
           // http://wiki.forum.nokia.com/index.php/Graphics_memory_handling
           case EEventUser: {
             TApaSystemEvent* eventData = reinterpret_cast<TApaSystemEvent*>(event->EventData());
             if ((*eventData) == EApaSystemEventShutdown) {
                 eventData++;
                 if ((*eventData) == KGoomMemoryLowEvent) {
                  return true;
                 }
             }
             break;
           }
           default:
             break;
         };

         // Always return false so we don't stop
         // the event from being processed
         return false;
       }
     #endif
     };

     int main(int argc, char *argv[])
     {
         // NOTE: set this value before creating MyApplication instance
         // http://doc.trolltech.com/qapplication.html#setGraphicsSystem
         QApplication::setGraphicsSystem("raster"); // NOTE: Seems that raster have to be enabled with Nokia N8

         MyApplication a(argc, argv);

         // Lock Symbian orientation
     #ifdef Q_OS_SYMBIAN
         CAknAppUi* appUi = dynamic_cast<CAknAppUi*> (CEikonEnv::Static()->AppUi());
         TRAP_IGNORE(
         if (appUi) {
             appUi->SetOrientationL(CAknAppUi::EAppUiOrientationLandscape);
         }
         );
     #endif

         CameraExample w;
         w.showFullScreen();

         return a.exec();
     }