Issues with drawing in a QGraphicsScene

cuddlykittens11

I'm working on an animation application right now and I have this cursor that is represented by a QGraphics Object. I'm doing it in PyQt4, but the Qt code is pretty much 1:1 with the C++ version. Here is the code for drawing it:

@
def init(self, scene=None, parent=None):
# ...
points = [
QPoint(0, 0),
QPoint(10, 0),
QPoint(10, 2),
QPoint(5, 7),
QPoint(0, 2)
]
self.cursorPoly = QPolygonF(points)
@

@ def paint(self, painter, option, widget=None):
# Draw the cursor
painter.setPen(QPen(Qt.black))
painter.setBrush(QBrush(Qt.white))
painter.drawPolygon(self.cursorPoly)

    # Draw the red line
    painter.setPen(QPen(Qt.red))
    painter.setBrush(QBrush(Qt.NoBrush))
    painter.drawLine(QPoint(5, 7), QPoint(5, FrameMark.MARK_HEIGHT))

@

When I have a QGraphicsView render the object in a scale of (1,1), it looks like this:
!http://i.imgur.com/5lS9sSJ.png(bad)!

This is what it looks like when the QGraphicsView is in a scale of (2,2):
!http://i.imgur.com/mAyIDEg.png(okay)!

This is what I'm trying to achive:
!http://i.imgur.com/3qVhVUu.png(best)!

I'd prefer to do this without loading up the later image, though that is certainly possible. I also don't have any render hints set for the painter for the QGraphicsView.

Asperamanca

If I understood you correctly, you want an item that ignores the scaling factor? Try setFlag(QGraphicsItem::ItemIgnoresTransformations) and see if that does what you need.

cuddlykittens11

I should have clarified. The first and third images are completely different. The second is what I want it to look like, except that it's scalled up. The shapes of the while parts are different.

I think it has something to do with the painting coordniate system.

cuddlykittens11

I added the line:

@painter.transte(QPointF(0.5, 0.5))@

and now it looks how I want it. I find this very odd.