from Tkinter import *

# This isn't a real widget. Note it doesn't descend from anything and needs
# a canvas to exist

class Icon:

    def toggleSelect(self):
	if (self.selected):
	    self.unselect()
	else:
	    self.select()

    def selectCallback(self, selected, data):
	if (selected):
	    self.select()
	else:
	    self.unselect()

    def __init__(self, Canvas, Item):
	self.canvas = Canvas
	self.id = Item
	self.selected = 0

class BackIcon(Icon):

    def select(self):
	self.canvas.itemconfig(self.backid, { 'fill' : 'red' } )
	self.selected = 1

    def unselect(self):
	self.canvas.itemconfig(self.backid, { 'fill' : self.canvas['back'] } )
	self.selected = 0

    def __init__(self, Canvas, Item, Backdrop):
	Icon.__init__(self, Canvas, Item)
	self.backid = Backdrop