Source Code for Module library.pyjamas.ui.FocusListener

 1  # Copyright 2006 James Tauber and contributors 
 2  # Copyright (C) 2009 Luke Kenneth Casson Leighton <lkcl@lkcl.net> 
 3  # 
 4  # Licensed under the Apache License, Version 2.0 (the "License"); 
 5  # you may not use this file except in compliance with the License. 
 6  # You may obtain a copy of the License at 
 7  # 
 8  #     http://www.apache.org/licenses/LICENSE-2.0 
 9  # 
10  # Unless required by applicable law or agreed to in writing, software 
11  # distributed under the License is distributed on an "AS IS" BASIS, 
12  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
13  # See the License for the specific language governing permissions and 
14  # limitations under the License. 
15  from pyjamas import DOM 
16  from pyjamas.ui import Event 
17   
18 -def fireFocusEvent(listeners, sender, event): 
19      type = DOM.eventGetType(event) 
20      if type == "focus": 
21          for listener in listeners: 
22              listener.onFocus(sender) 
23      elif type == "blur": 
24          for listener in listeners: 
25              listener.onLostFocus(sender) 
26   
27  FOCUS_EVENTS = ["focus", "blur"] 
28   
29 -class FocusHandler: 
30   
31 -    def __init__(self): 
32          self._focusListeners = [] 
33          self.sinkEvents( Event.FOCUSEVENTS ) 
34   
35 -    def onFocus(self, sender): 
36          pass 
37   
38 -    def onLostFocus(self, sender): 
39          pass 
40   
41 -    def onBrowserEvent(self, event): 
42          type = DOM.eventGetType(event) 
43          if type == "blur" or type == "focus": 
44              fireFocusEvent(self._focusListeners, self, event) 
45   
46 -    def addFocusListener(self, listener): 
47          self._focusListeners.append(listener) 
48   
49 -    def removeFocusListener(self, listener): 
50          self._focusListeners.remove(listener) 
51