Qt 4.8: demoapplication.cpp Example File (demos/embedded/fluidlauncher/demoapplication.cpp)

Qt Reference Documentation

# demoapplication.cpp Example File

demos/embedded/fluidlauncher/demoapplication.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** GNU Lesser General Public License Usage
     ** This file may be used under the terms of the GNU Lesser General Public
     ** License version 2.1 as published by the Free Software Foundation and
     ** appearing in the file LICENSE.LGPL included in the packaging of this
     ** file. Please review the following information to ensure the GNU Lesser
     ** General Public License version 2.1 requirements will be met:
     ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
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     ** rights. These rights are described in the Nokia Qt LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU General
     ** Public License version 3.0 as published by the Free Software Foundation
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     ** file. Please review the following information to ensure the GNU General
     ** Public License version 3.0 requirements will be met:
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     ****************************************************************************/

     #include <QDebug>
     #include <QDir>

     #include "demoapplication.h"

     DemoApplication::DemoApplication(QString executableName, QString caption, QString imageName, QStringList args)
     {
         imagePath = imageName;
         appCaption = caption;

         if (executableName[0] == QLatin1Char('/'))
             executablePath = executableName;
         else
             executablePath = QDir::cleanPath(QDir::currentPath() + QLatin1Char('/') + executableName);

         arguments = args;

         process.setProcessChannelMode(QProcess::ForwardedChannels);

         QObject::connect( &process, SIGNAL(finished(int,QProcess::ExitStatus)),
                           this, SLOT(processFinished(int,QProcess::ExitStatus)));

         QObject::connect( &process, SIGNAL(error(QProcess::ProcessError)),
                           this, SLOT(processError(QProcess::ProcessError)));

         QObject::connect( &process, SIGNAL(started()), this, SLOT(processStarted()));
     }

     void DemoApplication::launch()
     {
         process.start(executablePath, arguments);
     }

     QImage* DemoApplication::getImage()
     {
         return new QImage(imagePath);
     }

     QString DemoApplication::getCaption()
     {
         return appCaption;
     }

     void DemoApplication::processFinished(int exitCode, QProcess::ExitStatus exitStatus)
     {
         Q_UNUSED(exitCode);
         Q_UNUSED(exitStatus);

         emit demoFinished();

         QObject::disconnect(this, SIGNAL(demoStarted()), 0, 0);
         QObject::disconnect(this, SIGNAL(demoFinished()), 0, 0);
     }

     void DemoApplication::processError(QProcess::ProcessError err)
     {
         qDebug() << "Process error: " << err;
         if (err == QProcess::Crashed)
             emit demoFinished();
     }

     void DemoApplication::processStarted()
     {
         emit demoStarted();
     }