DrawContext.getFrameRegion

Retrieves the region that is currently being repainted.

After a call to gdk.draw_context.DrawContext.beginFrame this function will return a union of the region passed to that function and the area of the surface that the context determined needs to be repainted.

If context is not in between calls to gdk.draw_context.DrawContext.beginFrame and gdk.draw_context.DrawContext.endFrame, null will be returned.