/pyjs/tests/test012.py

 1import DOM
 2
 3class Widget:
 4
 5    def __init__(self):
 6        self.attached = False
 7
 8    def setParent(self, parent):
 9        self.parent = parent
10        if parent == None:
11            self.onDetach()
12        elif parent.attached:
13            self.onAttach()
14
15    def onAttach(self):
16        if self.attached:
17            return
18        self.attached = True
19        DOM.setEventListener(self.getElement(), self)
20        
21    def onDetach(self):
22        if not self.attached:
23            return
24        self.attached = False
25        DOM.setEventListener(self.getElement(), None)