lib/python/Components/Converter/ConditionalShowHide.py

   1 from Converter import Converter
   2
   3 class ConditionalShowHide(Converter, object):
   4         def __init__(self, type):
   5                 Converter.__init__(self, type)
   6                 self.invert = type == "Invert"
   7
   8         def calcVisibility(self):
   9                 b = self.source.boolean
  10                 if b is None:
  11                         return True
  12                 b ^= self.invert
  13                 return b
  14
  15         def changed(self, what):
  16                 vis = self.calcVisibility()
  17                 for x in self.downstream_elements:
  18                         x.visible = vis
  19
  20         def connectDownstream(self, downstream):
  21                 Converter.connectDownstream(self, downstream)
  22                 downstream.visible = self.calcVisibility()