c++ - Is it possible to draw a colored rectangle on a pushButton? -

i want after choosing color qcolordialog put rectangle (as preview) on pushbutton , change color color have chosen.

the pushbutton before choosing color:

the pushbutton after choosing color:

is possible draw colored rectangle on pushbutton,
, how can (an example)?

create custom class derived of qpushbutton, example:

pushbutton.h

#ifndef pushbutton_h #define pushbutton_h  #include <qpushbutton>  class pushbutton : public qpushbutton { public:     pushbutton(qwidget*parent=0);  protected:     void paintevent(qpaintevent *event); };  #endif // pushbutton_h 

pushbutton.cpp

#include "pushbutton.h" #include <qpainter>  pushbutton::pushbutton(qwidget *parent):qpushbutton(parent) { }  void pushbutton::paintevent(qpaintevent *event) {     qpushbutton::paintevent(event);     qrect r(0, 0, width()/3, height());     r.moveto(rect().center()-r.center());     qpainter painter(this);     painter.setbrush(qt::red);     painter.drawrect(r); }