pyqgis - Setting layer visibility in QGIS Python API?

Im having a problem toggling the visibility of map layers in pyqgis (2.4). I have a simple interface, just the map canvas, no legend, and basically a radio button that toggles between two raster layers.

Layers are initialized like this:

lyr = QgsRasterLayer(os.getcwd() + '/data/rasters/dof/dof.vrt', 'Ortophoto')
QgsMapLayerRegistry.instance().addMapLayer(lyr, False)
ml = QgsMapCanvasLayer(lyr)
ml.setVisible(False)

lyr2 = QgsRasterLayer(os.getcwd() + '/data/rasters/chm/chm.vrt', 'Chm')        
QgsMapLayerRegistry.instance().addMapLayer(lyr2, False)

ml2 = QgsMapCanvasLayer(lyr2)
ml2.setVisible(True)

When i want to toggle their visibility i do:

ml.setVisible(True)
ml2.setVisible(False)

But unfortunately, the rendering on the map canvas stays the same.

What am i missing?

Answer

At the moment (QGIS 2.x) (and I know it's a bit gross) but you also have to update the layer set on the canvas to update the layer state change

canvas.setLayerSet([ml2, ml])

This will also control the render order. m1 will reneder first then ml2 on top of it.