Qt 5.6 | Qt QML | Extending QML - Binding Example | happybirthdaysong.cpp Example File

Qt 5.6.3 Reference Documentation

# happybirthdaysong.cpp Example File

referenceexamples/binding/happybirthdaysong.cpp

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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)
      {
          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));
      }