[Qgis-developer] Possible bug with QgsRubberBand refreshing

[Matthias Kuhn]

On 03/17/2015 03:50 PM, Anatoliy Golubev wrote:
> Hi list!
>
> QgsRubberBand items sometimes not refreshing properly when another map
> canvas item (QgsVertexMarker) intersects them. This happens with 2.8,
> in 2.6.1 works as expected.
>
> See: https://www.dropbox.com/s/4egl61juue9ewop/rubberband.png?dl=0 as
> illustration
>
> How to reproduce:
> 1. Open empty project (epsg:4326)
>
> 2. Execute this script in python console:
> from PyQt4.QtCore import *
> from PyQt4.QtGui import *
> from qgis.gui import *
> from qgis.core import *
>
> mCursor = QgsVertexMarker(iface.mapCanvas())
> mCursor.setIconType(QgsVertexMarker.ICON_BOX)
> mCursor.setIconSize(20)
> mCursor.setZValue(5)
>
> points = [[QgsPoint(0, 0), QgsPoint(20, 30), QgsPoint(0, 60)]]
>
> rb = QgsRubberBand(iface.mapCanvas(), True)
> rb.setToGeometry(QgsGeometry.fromPolygon(points), None)
> rb.setColor(QColor(125, 125, 0))
> rb.show()
>
> def changeCursorPos(p):
>     mCursor.setCenter(p)
>
> iface.mapCanvas().xyCoordinates.connect(changeCursorPos)
>
> 3. Move mouse cursor over rubber band.
> You can erase rubber band from bottom to some upper point.
>
> Tested on win7 32bit
>
> Anyone confirms?
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Confirmed on Fedora Linux 64bit, current master.