QPainter

[luca72]

Hello
using qt3 i do the follow for paint some line in a frame

gr = QPainter(self.frame3)
gr drawLine(30,10,30,490)
and the line is draw.

Whit qt4 :
gr = QtGui.QPainter(self.frame3)
#gr.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine))
gr.drawLine(30,10,30,490)
and nothing is draw but i have no error

The frame is the same with the same dimension and relative dimension.

where is the error?

Regards

Luca

 

[Phil Thompson]

Hello
using qt3 i do the follow for paint some line in a frame

gr = QPainter(self.frame3)
gr drawLine(30,10,30,490)
and the line is draw.

Whit qt4 :
gr = QtGui.QPainter(self.frame3)
#gr.setPen(QtGui.QPen(QtCore.Qt.black, 1, QtCore.Qt.SolidLine))
gr.drawLine(30,10,30,490)
and nothing is draw but i have no error

The frame is the same with the same dimension and relative dimension.

where is the error?

Impossible to tell with so little information. One guess is that Qt4 requires
you to paint from a reimplementation of paintEvent().

Post a small but complete example to the PyQt mailing list.

Phil