[Kde-bindings] Qt bindings to D programming language.

[Eldar Insafutdinov]

Yeah, I also thought about inheritance. But I can't understand one. For
example I subclass a QWidget in my C++ part of wrapper:

class QWidget_Proxy: public QWidget
{
   Q_OBJECT
   public:
      QWidget_Proxy(QWidget* parent = 0);

      void ancestor_mousePressEvent(QMouseEvent* qme);
      virtual void mousePressEvent(QMouseEvent* qme);
}

void QWidget_Proxy::QWidget_Proxy(QWidget* parent)
{

}

//default implementation
void QWidget_Proxy::ancestor_mousePressEvent(QMouseEvent* qme)
{
   QWidget::mousePressEvent(qme);
}

void QWidget_Proxy::mousePressEvent(QMouseEvent* qme)
{
   Dispatch_QWidget_MousePressEvent(this, qme);
}



extern "C" void QWidget_mousePressEvent(Qwidget* qwidget, QMouseEvent qme)
{
     qwidget.ancestor_mousePressEvent(QMouseEvent* qme)
}


And my D wrapper
class QWidget : QObject
{



private void* qwidgetPtr;

     //constructor of D class
     this()
     {
          qwidgetPtr = QWidget_new();
     }

     static extern (C) void Dispatch_QWidget_MousePressEvent(void* classPtr,
QMouseEvent *qme);
     {
          classPtr.mousePressEvent(qme);
     }

     void mousePressEvent(QMouseEvent qme)
     {
          QWidget_mousePressEvent(this.qwidgetPtr,qme)
     }
}

Okey and I have the QPushButton which inherirts from QWidget (not directly
but it doesn't matter). C++ wrapper:

extern "C" void* QPushButton_new()
{
    return new QPushButton_proxy();
}

D wrapper:
class QPushButton : QWidget
{



private void* qpushbuttonPtr;

     //constructor of D class
     this()
     {
          qpushbuttonPtr = QPushButton_new();
     }
}

This is not 100% accurate - but the rough idea is that QPushButton_proxy is
inherited from QPushButton and QPushButton in its turn is inherited from
QWidget, not from QWidget_proxy. so when we create an instance of
QPushButton - all this virtual functions will not be implemented, because
they are implemented only in QWidget_proxy - and nothing is derived from
this class.
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