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 selectionChanged(self, index):
  31                 if self.disable_callbacks:
  32                         return
  33
  34                 for x in self.onSelectionChanged:
  35                         x()
  36
  37         @cached
  38         def getCurrent(self):
  39                 return self.master is not None and self.master.current
  40
  41         current = property(getCurrent)
  42
  43         def setIndex(self, index):
  44                 if self.master is not None:
  45                         self.master.index = index
  46
  47         @cached
  48         def getIndex(self):
  49                 if self.master is not None:
  50                         return self.master.index
  51                 else:
  52                         return -1
  53
  54         setCurrentIndex = setIndex
  55
  56         index = property(getIndex, setIndex)
  57
  58         def updateList(self, list):
  59                 """Changes the list without changing the selection or emitting changed Events"""
  60                 assert len(list) == len(self.__list)
  61                 print "get old index"
  62                 old_index = self.index
  63                 print "disable callback"
  64                 self.disable_callbacks = True
  65                 print "set list"
  66                 self.list = list
  67                 print "set index"
  68                 self.index = old_index
  69                 print "reenable callbacks"
  70                 self.disable_callbacks = False
  71                 print "done"