code.vuplus.com Git - vuplus_dvbapp/blob - lib/python/Components/Sources/List.py

   1 from Source import Source
   2 from Components.Element import cached
   3
   4 class List(Source, object):
   5         """The datasource of a listbox. Currently, the format depends on the used converter. So
   6 if you put a simple string list in here, you need to use a StringList converter, if you are
   7 using a "multi content list styled"-list, you need to use the StaticMultiList converter, and
   8 setup the "fonts".
   9
  10 This has been done so another converter could convert the list to a different format, for example
  11 to generate HTML."""
  12         def __init__(self, list = [ ], enableWrapAround = False, item_height = 25, fonts = [ ]):
  13                 Source.__init__(self)
  14                 self.__list = list
  15                 self.onSelectionChanged = [ ]
  16                 self.item_height = item_height
  17                 self.fonts = fonts
  18                 self.disable_callbacks = False
  19
  20         def setList(self, list):
  21                 self.__list = list
  22                 self.changed((self.CHANGED_ALL,))
  23
  24         list = property(lambda self: self.__list, setList)
  25
  26         def entry_changed(self, index):
  27                 if not self.disable_callbacks:
  28                         self.downstream_elements.entry_changed(self, index)
  29
  30         def count(self):
  31                 return len(self.__list)
  32
  33         def selectionChanged(self, index):
  34                 if self.disable_callbacks:
  35                         return
  36
  37                 for x in self.onSelectionChanged:
  38                         x()
  39
  40         @cached
  41         def getCurrent(self):
  42                 return self.master is not None and self.master.current
  43
  44         current = property(getCurrent)
  45
  46         def setIndex(self, index):
  47                 if self.master is not None:
  48                         self.master.index = index
  49
  50         @cached
  51         def getIndex(self):
  52                 if self.master is not None:
  53                         return self.master.index
  54                 else:
  55                         return None
  56
  57         setCurrentIndex = setIndex
  58
  59         index = property(getIndex, setIndex)
  60
  61         def updateList(self, list):
  62                 """Changes the list without changing the selection or emitting changed Events"""
  63                 assert len(list) == len(self.__list)
  64                 print "get old index"
  65                 old_index = self.index
  66                 print "disable callback"
  67                 self.disable_callbacks = True
  68                 print "set list"
  69                 self.list = list
  70                 print "set index"
  71                 self.index = old_index
  72                 print "reenable callbacks"
  73                 self.disable_callbacks = False
  74                 print "done"