[Qgis-developer] add rasterlayer to qgsmapcanvas

[Felix Schmidt]

Hello everyone,
I try to load on signal, a rasterlayer to qgsmapcanvas. I try it like in
the pycookbook:

@QtCore.pyqtSlot()
      def loadRasterImage(self):
      print "slot works"
          fileName = QFileDialog.getOpenFileName(None, "historical map",
".", "Image Files (*.png *.jpg *.bmp *.tiff)")
          fileInfo = QFileInfo(fileName)
          baseName = fileInfo.baseName()
          rlayer = QgsRasterLayer(fileName, baseName)
          if not rlayer.isValid():
              print "Layer failed to load!"
          QgsMapLayerRegistry.instance().addMapLayer(rlayer)
      print rlayer.extent().yMinimum()
      self.canvasRaster.setExtent(rlayer.extent())
      self.canvasRaster.setLayerSet( [ QgsMapCanvasLayer(rlayer) ] )

self.canvasRaster is defined in the gui . I search for 8h but I dont
find a solutionen, because there are no errors.

It load the rasterlayer to the main program of qgis, but not in my
qgsmapcanvas. it is still white.

please help me.

Felix