lib/python/Screens/HelpMenu.py

   1 from Screen import Screen
   2 from Components.Pixmap import Pixmap, MovingPixmap
   3 from Components.Label import Label
   4 from Components.ActionMap import ActionMap
   5 from Components.HelpMenuList import HelpMenuList
   6
   7 class HelpMenu(Screen):
   8         def __init__(self, session, list):
   9                 Screen.__init__(self, session)
  10                 self.onSelChanged = [ ]
  11                 self["list"] = HelpMenuList(list, self.close)
  12                 self["list"].onSelChanged.append(self.SelectionChanged)
  13                 self["rc"] = Pixmap()
  14                 self["arrowup"] = MovingPixmap()
  15                 self["arrowup"].hide()
  16                 self["sh_arrowup"] = Pixmap()
  17                 self["sh_arrowup"].hide()
  18                 self["long_key"] = Label("")
  19
  20                 self["actions"] = ActionMap(["WizardActions"],
  21                 {
  22                         "ok": self["list"].ok,
  23                         "back": self.close,
  24                 }, -1)
  25
  26         def SelectionChanged(self):
  27                 selection = self["list"].getCurrent()
  28                 selection = selection and selection[3]
  29                 arrow = self["arrowup"]
  30                 sh_arrow = self["sh_arrowup"]
  31
  32                 if selection and selection[0][:3] == "sh_":
  33                         sh_arrow.show()
  34                 else:
  35                         sh_arrow.hide()
  36
  37                 if selection and selection[0][:2] == "l_":
  38                         self["long_key"].setText(_("Long Keypress"))
  39                 else:
  40                         self["long_key"].setText("")
  41
  42                 if selection is None:
  43                         arrow.hide()
  44                 else:
  45                         arrow.moveTo(selection[1], selection[2], 1)
  46                         arrow.startMoving()
  47                         arrow.show()
  48
  49 class HelpableScreen:
  50         def __init__(self):
  51                 self["helpActions"] = ActionMap( [ "HelpActions" ],
  52                         {
  53                                 "displayHelp": self.showHelp,
  54                         })
  55
  56         def showHelp(self):
  57                 self.session.openWithCallback(self.callHelpAction, HelpMenu, self.helpList)
  58
  59         def callHelpAction(self, *args):
  60                 if len(args):
  61                         (actionmap, context, action) = args
  62                         actionmap.action(context, action)