Hi all I create a QgsVertexMarker and add it to the canvas:
*marker = QgsVertexMarker(self.iface.mapCanvas()) marker.setCenter(point) marker.setColor(QColor(0,255,0)) marker.setIconSize(5) marker.setIconType(QgsVertexMarker.ICON_CROSS) marker.setPenWidth(3) self.iface.mapCanvas().refresh() * *When I do this the marker is successfully added to the canvas. Everything is fine, when the layers loaded to the canvas are locally available (eg: normal raster or vector layers). The problem comes in with remote layers such as Google layers. When I use the code above on a canvas with a Google layer, it takes extremely long to "add" the marker. The problem lies in: **self.iface.mapCanvas().refresh(). As far as I can see, refresh() reloads the entire visible area, thus requesting the image again from the Google server and slowing done the entire process. Is there a better way to add a vertex, without reloading the entire image? I've tried self.iface.mapCanvas().scene().update() and marker.show() instead of the refresh() statement, but then the vertex isn't drawn. Chris *
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