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

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