QPainter

[luca72]

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

gr = QPainter(self.f rame3)
gr drawLine(30,10, 30,490)
and the line is draw.

Whit qt4 :
gr = QtGui.QPainter( self.frame3)
#gr.setPen(QtGu i.QPen(QtCore.Q t.black, 1, QtCore.Qt.Solid Line))
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]

Re: QPainter

On Wednesday 20 June 2007 4:44 pm, luca72 wrote:

Hello
using qt3 i do the follow for paint some line in a frame
>
gr = QPainter(self.f rame3)
gr drawLine(30,10, 30,490)
and the line is draw.
>
Whit qt4 :
gr = QtGui.QPainter( self.frame3)
#gr.setPen(QtGu i.QPen(QtCore.Q t.black, 1, QtCore.Qt.Solid Line))
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 reimplementatio n of paintEvent().

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

Phil