for any one who reads this i did it using QEventFilter.
this topic was helpful: http://www.qtcentre.org/threads/6272...cking-on-image

this is the code i use:
in header file:
Qt Code: 
  1. bool eventFilter(QObject *o, QEvent *e);
To copy to clipboard, switch view to plain text mode 

in .cpp

Qt Code: 
  1. //filter mouse tracking to the selection area only
  2. bool MainWindow::eventFilter(QObject *o, QEvent *e){
  3.   if(o!= lblScrollImage) return false;
  4.   if(e->type()==QEvent::MouseMove){
  5.     QMouseEvent *mev = static_cast<QMouseEvent*>(e);
  6.     QVariant x(mev->pos().x());
  7.     QVariant y(mev->pos().y());
  8.     ui->lblX->setText(x.toString());
  9.     ui->lblY->setText(y.toString());
  10.     //polyPoints << QPoint(x.toInt(), y.toInt());
  11.   }
  12.   else if (e->type()==QEvent::MouseButtonPress)
  13.   {
  14.       QMouseEvent *mev = static_cast<QMouseEvent*>(e);
  15.       QVariant x(mev->pos().x());
  16.       QVariant y(mev->pos().y());
  17.       ui->lblX->setText(x.toString());
  18.       ui->lblY->setText(y.toString());
  19.       ui->lineEditX->setText(x.toString());
  20.       ui->lineEditY->setText(y.toString());
  21.       polyPoints << QPoint(x.toInt(), y.toInt());
  22.   }
  23.   return false;
  24. }
To copy to clipboard, switch view to plain text mode 


regards,
ahmed