On Thu, Feb 13, 2014 at 7:13 AM, Denis Rouzaud <[email protected]> wrote: > Hi Radim, > > Can you show us the whole code?
https://github.com/blazek/spline/blob/master/spline/spline.py Radim > Cheers, > > Denis > > > On 12. 02. 14 19:17, Radim Blazek wrote: >> >> On Wed, Feb 12, 2014 at 2:50 PM, Martin Dobias <[email protected]> >> wrote: >>> >>> Hi Radim >>> >>> On Wed, Feb 12, 2014 at 8:03 PM, Radim Blazek <[email protected]> >>> wrote: >>>> >>>> On Wed, Feb 12, 2014 at 1:45 PM, Radim Blazek <[email protected]> >>>> wrote: >>>>> >>>>> I am using rubber band in Python plugin: >>>>> self.rb = QgsRubberBand(self.canvas, QGis.Polygon) >>>>> and on mouse move >>>>> self.rb.addPoint( point, update ) >>>>> >>>>> It works well on most systems only for Win7/32bit (QGIS 2.0.1, Python >>>>> 2.7.4) it was reported that it fails with "RuntimeError: underlying >>>>> C/C++ object has been deleted" >>> >>> When does it report the error - when closing QGIS? >> >> I don't know but I presume when map tool is used, it is called from >> QgsMapTool::canvasMoveEvent(). >> >> Radim >> >>>>> I see that ownership of rubber band is passed to map canvas >>>>> >>>>> QgsRubberBand( QgsMapCanvas* mapCanvas /TransferThis/, >>>>> QGis::GeometryType geometryType = QGis::Line ); >>>>> >>>>> that is OK, but QgsMapCanvas should not delete QGraphicsItem until it >>>>> is destructed. >>>>> >>>>> So how can the QgsRubberBand be deleted before QGIS is closed? >>>> >>>> BTW, because true owner of QGraphicsItem is QGraphicsScene, should not >>>> we first mScene->removeItem() (which returns ownership) before item is >>>> deleted in QgsMapCanvas destructor? >>> >>> That's the correct approach in Python (IIRC). You can remove the item >>> in your map tool's deactivate() method. >>> >>> Regards >>> Martin >> >> _______________________________________________ >> Qgis-developer mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-developer > > _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
