Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# main.cpp Example File

demos/mobile/qcamera/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "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
     ** "AS IS" 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."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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();
     }