Hi,
I want to create a QCanvasView which shows a "zoomed" version of it's Canvas. What I
tried looked like this:
class ZoomedCanvasView(QCanvasView):
def __init__(self, canvas, parent):
QCanvasView.__init__(self, canvas, parent)
matrix = self.matrix = QWMatrix()
matrix.scale(2,2)
def drawContents(self, painter, cx, cy, cw, ch):
painter.setWorldMatrix(self.matrix)
QCanvasView.drawContents(self, painter, cx, cy, cw, ch)
Unfortunately this doesn't work, in several ways: First, the last four parameters are
not always passed, so an exception "Wrong number of arguments" is raised (This usually
happens only in the first call of drawContents). However, when I change it to
something like
def drawContents(*args):
...
apply(QCanvasView.drawContents, args)
another exception, "parameter 2 has wrong type", is raised - but not always. The third
kind of error is not raising an exception at all, but simply not redrawing the
CanvasItems properly after they scrolled out of the viewport an in again.
Is this a bug, or am I doing something terribly wrong?
Regards
Henrik Motakef
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