example handler augmentation

Created by: zeffii

adds the possibility to perform a state test in script nodes / exec nodes, useful when the user wants to execute bpy.ops

then you would write

import sverchok
if sverchok.core.update_system.is_postload_complete():
    bpy.ops.render.render(use_viewport=True)

untested..

maybe it needs also some throttling..

import sverchok
if sverchok.core.update_system.is_postload_complete():
    ng = self.id_data
    with ng.throttle_update():
        try:
            bpy.ops.render.render(use_viewport=True)
        except:
            pass

nope.. also doesn't work, at least.. not here.

and also not..

import sverchok
if sverchok.core.update_system.is_postload_complete():
    ng = self.id_data
    with ng.throttle_update():
        try:
            bpy.ops.render.render(use_viewport=True)
            print("rendering new image")

        except:
            print(" ")