lib/python/Components/Converter/StringListSelection.py

   1 from Components.Converter.Converter import Converter
   2 from Components.Element import cached
   3
   4 class StringListSelection(Converter, object):
   5         "extracts the first element of a the current string list  element for displaying it on LCD"
   6         def __init__(self, args):
   7                 Converter.__init__(self, args)
   8
   9         def selChanged(self):
  10                 self.downstream_elements.changed((self.CHANGED_ALL, 0))
  11
  12         @cached
  13         def getText(self):
  14                 cur = self.source.current
  15                 if cur and len(cur):
  16                         return cur[0]
  17                 return None
  18
  19         text = property(getText)
  20
  21         def changed(self, what):
  22                 if what[0] == self.CHANGED_DEFAULT:
  23                         self.source.onSelectionChanged.append(self.selChanged)
  24                 Converter.changed(self, what)