Extending QML - Property Value Source Example

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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, &QTimer::timeout, this, &HappyBirthdaySong::advance); timer->start(1000); } void HappyBirthdaySong::setTarget(const QQmlProperty &p) { m_target = p; } QString HappyBirthdaySong::name() const { return m_name; } void HappyBirthdaySong::setName(const QString &name) { 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 << ""; } void HappyBirthdaySong::advance() { m_line = (m_line + 1) % m_lyrics.count(); m_target.write(m_lyrics.at(m_line)); }