Qt 4.8: happybirthdaysong.cpp Example File (declarative/cppextensions/referenceexamples/binding/happybirthdaysong.cpp)

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# happybirthdaysong.cpp Example File

declarative/cppextensions/referenceexamples/binding/happybirthdaysong.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples 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
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     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Digia Plc 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.
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     #include "happybirthdaysong.h"
     #include <QTimer>

     HappyBirthdaySong::HappyBirthdaySong(QObject *parent)
     : QObject(parent), m_line(-1)
     {
         setName(QString());
         QTimer *timer = new QTimer(this);
         QObject::connect(timer, SIGNAL(timeout()), this, SLOT(advance()));
         timer->start(1000);
     }

     void HappyBirthdaySong::setTarget(const QDeclarativeProperty &p)
     {
         m_target = p;
     }

     QString HappyBirthdaySong::name() const
     {
         return m_name;
     }

     void HappyBirthdaySong::setName(const QString &name)
     {
         if (m_name == name)
             return;

         m_name = name;

         m_lyrics.clear();
         m_lyrics << "Happy birthday to you,";
         m_lyrics << "Happy birthday to you,";
         m_lyrics << "Happy birthday dear " + m_name + ",";
         m_lyrics << "Happy birthday to you!";
         m_lyrics << "";

         emit nameChanged();
     }

     void HappyBirthdaySong::advance()
     {
         m_line = (m_line + 1) % m_lyrics.count();

         m_target.write(m_lyrics.at(m_line));
     }