I have made a filter plug-in in Python using python-fu and I wonder if it is possible to make it preview the changes done in the sliders to the active layer or to a new layer in the main window. Is there any tutorial for coding that? If I can understand correctly the GUI can't be anymore automatic (python-fu) but there's a big gap in available tutorials/guides. The only Python plug-in I could find being able to do that preview was "Layer Effects" but with 6000+ lines it is not that easy to digest...
Any help is welcome