Q_PROPERTY Macrosu

Örnek
Şöyle yaparız

// Sy_test.h - The wrapped class
class Sy_test : public QObject
{
  Q_OBJECT
  Q_PROPERTY( bool prop READ getProp WRITE setProp NOTIFY propChanged )

public:
  Sy_test( QObject* parent = nullptr ) :
    QObject{ parent },
    prop_{ false } {}

    bool getProp() const { return prop_; }

public slots:
  void setProp( bool value )
  {
    if ( value != prop_) {
      prop_ = value;
      emit propChanged( prop_);
    }
  }

signals:
  void propChanged (bool value);

private:
    bool prop_;
};

Örnek
Şöyle yaparız.

class Widget : public QObject {
  Q_OBJECT
  Q_PROPERTY(int size READ size WRITE setSize NOTIFY sizeChanged)

public:
  Widget(QObject * parent = nullptr) : QObject(parent){}
  int size() const;

public slots:
  void setSize(int new_size);

signals:
  void sizeChanged(int); //!< signals a size change

private:
  int m_size = 0; //!< the Widget's size, see #size.
};

Şöyle yaparız.

void Widget::setSize(int new_size) { 
  if(new_size != m_size) {
    m_size = new_size; 
    emit sizeChanged(m_size);
  }
}

int Widget::size() const {
  return m_size;
}