[Qgis-user] update composer and export as png, using python

[Raymond Nijssen]

For creating a map animation I've made a python script that updates my 
layer's subset filter many times. It also updates my mapCanvas and the 
title label in my composer.

Now I'd like to automatically update the map in my composer as well, and 
export my entire composer as a png file afterwards.

I've been checking the cookbook and (c++) api docs very well but really 
cannot find a way that works...

Hoping any one can help.

Thanks,
Raymond