In my application I have a mapcanvas that contains several layers. some of layers need to be updated or rendered again because data has been changed ( like the geometry or some attributes )
Is there another way to update only one layer in a mapcanvas ?
My previous search is setLayerSet actually i use the setLayerSet but all of the layer are rendered again,
I am working in c++ / §QT 4.8.5 and qgis api c++ 2.8.2