lib/python/Components/ConditionalWidget.py

   1 import skin
   2 from GUIComponent import *
   3
   4 from enigma import *
   5
   6 class Widget(GUIComponent):
   7
   8         SHOWN = 0
   9         HIDDEN = 1
  10
  11         def __init__(self):
  12                 GUIComponent.__init__(self)
  13                 self.instance = None
  14                 self.state = self.SHOWN
  15
  16         def GUIcreate(self, parent):
  17                 self.instance = self.createWidget(parent)
  18
  19         def GUIdelete(self):
  20                 self.removeWidget(self.instance)
  21                 self.instance = None
  22
  23         def removeWidget(self, w):
  24                 pass
  25
  26         def showWidget(self):
  27                 self.state = self.SHOWN
  28                 self.instance.show()
  29
  30         def hideWidget(self):
  31                 self.state = self.HIDDEN
  32                 self.instance.hide()
  33
  34 class ConditionalWidget(Widget):
  35         def __init__(self, withTimer = True):
  36                 Widget.__init__(self)
  37
  38                 self.setConnect(None)
  39
  40                 if (withTimer):
  41                         self.conditionCheckTimer = eTimer()
  42                         self.conditionCheckTimer.timeout.get().append(self.update)
  43                         self.conditionCheckTimer.start(1000)
  44
  45         def setConnect(self, conditionalFunction):
  46                 self.conditionalFunction = conditionalFunction
  47
  48         def activateCondition(self, condition):
  49                 if (condition):
  50                         if (self.state == self.HIDDEN):
  51                                 self.showWidget()
  52                 else:
  53                         if (self.state == self.SHOWN):
  54                                 self.hideWidget()
  55
  56         def update(self):
  57                 if (self.conditionalFunction != None):
  58                         try:
  59                                 self.conditionalFunction() # check, if the conditionalfunction is still valid
  60                         except:
  61                                 self.conditionalFunction = None
  62                                 self.activateCondition(False)
  63
  64                         self.activateCondition(self.conditionalFunction())