from GUIComponent import *

from enigma import eListboxPythonMultiContent, eListbox, gFont

from Tools.KeyBindings import queryKeyBinding, getKeyDescription
#getKeyPositions

# [ ( actionmap, context, [(action, help), (action, help), ...] ), (actionmap, ... ), ... ]

class HelpMenuList(GUIComponent):
	def __init__(self, list, callback):
		GUIComponent.__init__(self)
		self.onSelChanged = [ ]
		self.l = eListboxPythonMultiContent()
		self.callback = callback
		
		l = [ ]
		for (actionmap, context, actions) in list:
			for (action, help) in actions:
				entry = [ ]
				
				buttons = queryKeyBinding(context, action)

				name = None
				
				for n in buttons:
					name = getKeyDescription(n)
					if name is not None:
						break

				entry.append( (actionmap, context, action, name ) )
				entry.append( (eListboxPythonMultiContent.TYPE_TEXT, 0, 0, 400, 28, 0, 0, help) )
				
				l.append(entry)
		
		self.l.setList(l)
		
		self.l.setFont(0, gFont("Regular", 26))
	
	def ok(self):
		# a list entry has a "private" tuple as first entry...
		l = self.l.getCurrentSelection()[0]
		
		# ...containing (Actionmap, Context, Action, keydata).
		# we returns this tuple to the callback.
		self.callback(l[0], l[1], l[2])
	
	def getCurrent(self):
		return self.l.getCurrentSelection()[0]

	def GUIcreate(self, parent):
		self.instance = eListbox(parent)
		self.instance.setContent(self.l)
		self.instance.setItemHeight(42)
		self.instance.selectionChanged.get().append(self.selectionChanged)
		
	def GUIdelete(self):
		self.instance.setContent(None)
		self.instance.selectionChanged.get().remove(self.selectionChanged)
		self.instance = None

	def selectionChanged(self):
		for x in self.onSelChanged:
			x()