Updating Layer tree after changing symbology with PyQGIS

Sunday, 2 August 2015

When I change symbology for a given QgsVectorLayer (QGIS 2.14.16 LTR) by

r=iface.activeLayer().rendererV2()
r.symbol().symbolLayers()[0].setColor(0,0,255,255)

as shown here:

and refreshing the map content by

iface.mapCanvas().refreshAllLayers()

I get the expected result, but the Layer Tree does not update as shown here:

What am I missing, and how can I update the Layer tree from PyQGIS programmatically?

Answer

Tell the layer tree view to refresh your layer's symbology:

iface.layerTreeView().refreshLayerSymbology( iface.activeLayer().id() )

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