[PyQt] QGraphicsView view jumping bug

[Zsolt Ero]

Oh, thanks for that! Was driving me crazy.

Zsolt



On 23 October 2012 22:37, Vincent Vande Vyvre
<vincent.vandevyvre at swing.be>wrote:

> Le 23/10/12 22:34, Zsolt Ero a écrit :
> > OK, here is the smallest possible example I could make it. The bug
> > happens when I click on the lower half of the image. Just copy a jpg
> > image at the same folder and rename it to "big.jpg".
> >
> > Zsolt
> >
> >
> >
> >
> >
> >
> >
> > On 23 October 2012 20:42, Phil Thompson <phil at riverbankcomputing.com
> > <mailto:phil at riverbankcomputing.com>> wrote:
> >
> >     On Tue, 23 Oct 2012 20:20:30 +0100, Zsolt Ero <zsolt.ero at gmail.com
> >     <mailto:zsolt.ero at gmail.com>> wrote:
> >     > I'm having a weird problem: my whole QGraphicsView goes crazy if I
> >     > uncomment the following lines in a class (of QtGui.QGraphicsItem):
> >     >
> >     > if len( self.points ) == 1:
> >     >  rect = QtCore.QRectF( self.points[0].x()-self.radius,
> >     > self.points[0].y()-self.radius,
> >     >  self.points[0].x()+self.radius,
> >     > self.points[0].y()+self.radius )
> >     >  return rect
> >     >
> >     > Here is the full boundingRect function:
> >     >
> >     > def boundingRect( self ):
> >     >  if len( self.points ) == 1:
> >     > rect = QtCore.QRectF( self.points[0].x()-self.radius,
> >     >  self.points[0].y()-self.radius,
> >     > self.points[0].x()+self.radius,
> >     >  self.points[0].y()+self.radius )
> >     > return rect
> >     >
> >     > poly = QtGui.QGraphicsPolygonItem( self.polygon )
> >     >  poly.setPen( self.pen )
> >     > return poly.boundingRect()
> >     >
> >     > What happens is that the view moves to top-left corner
> >     _sometimes_ when
> >     the
> >     > rectangle code is run.
> >     >
> >     > Here is my full code (just rename an image to big.jpg next to
> >     the file):
> >     > http://pastebin.com/h9tFZmpk
> >     >
> >     > I believe it's a bug in PyQt4, can you have a look at it?
> >
> >     Not without a short, complete example that demonstrates the problem.
> >
> >     Phil
> >
> >
> >
> >
> > _______________________________________________
> > PyQt mailing list    PyQt at riverbankcomputing.com
> > http://www.riverbankcomputing.com/mailman/listinfo/pyqt
> You must to set the geometry of your scene
>
> self.scene.setSceneRect(0, 0, self.img.width(), self.img.height())
>
> --
> Vincent V.V.
> Oqapy <https://launchpad.net/oqapy> . Qarte
> <https://launchpad.net/qarte> . PaQager <https://launchpad.net/paqager>
> _______________________________________________
> PyQt mailing list    PyQt at riverbankcomputing.com
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>
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