lib/python/Components/Converter/ConditionalShowHide.py

   1 from enigma import eTimer
   2 from Converter import Converter
   3
   4 class ConditionalShowHide(Converter, object):
   5         def __init__(self, argstr):
   6                 Converter.__init__(self, argstr)
   7                 args = argstr.split(',')
   8                 self.invert = "Invert" in args
   9                 self.blink = "Blink" in args
  10                 if self.blink:
  11                         self.blinktime = 500
  12                         self.timer = eTimer()
  13                         self.timer.callback.append(self.blinkFunc)
  14                 else:
  15                         self.timer = None
  16
  17         def blinkFunc(self):
  18                 if self.blinking == True:
  19                         for x in self.downstream_elements:
  20                                 x.visible = not x.visible
  21
  22         def startBlinking(self):
  23                 self.blinking = True
  24                 self.timer.start(self.blinktime)
  25
  26         def stopBlinking(self):
  27                 self.blinking = False
  28                 for x in self.downstream_elements:
  29                         if x.visible:
  30                                 x.hide()
  31                 self.timer.stop()
  32
  33         def calcVisibility(self):
  34                 b = self.source.boolean
  35                 if b is None:
  36                         return True
  37                 b ^= self.invert
  38                 return b
  39
  40         def changed(self, what):
  41                 vis = self.calcVisibility()
  42                 if self.blink:
  43                         if vis:
  44                                 self.startBlinking()
  45                         else:
  46                                 self.stopBlinking()
  47                 else:
  48                         for x in self.downstream_elements:
  49                                 x.visible = vis
  50
  51         def connectDownstream(self, downstream):
  52                 Converter.connectDownstream(self, downstream)
  53                 vis = self.calcVisibility()
  54                 if self.blink:
  55                         if vis:
  56                                 self.startBlinking()
  57                         else:
  58                                 self.stopBlinking()
  59                 else:
  60                         downstream.visible = self.calcVisibility()
  61
  62         def destroy(self):
  63                 if self.timer:
  64                         self.timer.callback.remove(self.blinkFunc)