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

     /****************************************************************************
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     ** This file is part of the examples of the Qt Toolkit.
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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));
     }