main.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtDeclarative module 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtDeclarative>
 #include <QtGui>
 #include <QAccelerometer>

 #include "accelerometerfilter.h"
 #include "settings.h"
 #include "taskswitcher.h"

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

 QTM_USE_NAMESPACE

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

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

     QDeclarativeView view;
     view.setSource(QUrl("qrc:/qml/BubbleLevel.qml"));
     view.setResizeMode(QDeclarativeView::SizeRootObjectToView);

     // ![1]
     Settings settings;

     QAccelerometer sensor;
     AccelerometerFilter filter;
     sensor.addFilter(&filter);

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

     // Associate Qt / QML signals and slots
     QObject::connect(rootObject, SIGNAL(saveCorrectionAngle(const QVariant&)),
                      &settings, SLOT(saveCorrectionAngle(const QVariant&)));

     QObject::connect(&filter, SIGNAL(rotationChanged(const QVariant&)),
                      rootObject, SLOT(handleRotation(const QVariant&)));

     QObject::connect(&settings, SIGNAL(correctionAngle(const QVariant&)),
                      rootObject, SLOT(setCorrectionAngle(const QVariant&)));

     QObject::connect((QObject*)view.engine(), SIGNAL(quit()),
                      &app, SLOT(quit()));

 #ifdef Q_WS_MAEMO_5
     TaskSwitcher taskSwitcher;

     QObject::connect(rootObject, SIGNAL(minimizeApplication()),
                      &taskSwitcher, SLOT(minimizeApplication()));

     // Show the task switcher button
     rootObject->setProperty("taskSwitcherVisible", true);
 #endif

     // Read correction factor from permanent storage and emit it to QML side
     settings.loadAndEmitCorrectionAngle();

     // Begin measuring of the accelerometer sensor
     sensor.start();

 #if defined(Q_WS_MAEMO_5) || defined(Q_OS_SYMBIAN) || defined(Q_WS_SIMULATOR)
     view.setGeometry(QApplication::desktop()->screenGeometry());
     view.showFullScreen();
 #else
     view.setGeometry((QRect(100, 100, 800, 480)));
     view.show();
 #endif

     return app.exec();
 }