Source Code for Module pyjamas.ui.MouseListener

 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 fireMouseEvent(listeners, sender, event): 
19      x = DOM.eventGetClientX(event) - DOM.getAbsoluteLeft(sender.getElement()) 
20      y = DOM.eventGetClientY(event) - DOM.getAbsoluteTop(sender.getElement()) 
21   
22      type = DOM.eventGetType(event) 
23      if type == "mousedown": 
24          for listener in listeners: 
25              listener.onMouseDown(sender, x, y) 
26      elif type == "mouseup": 
27          for listener in listeners: 
28              listener.onMouseUp(sender, x, y) 
29      elif type == "mousemove": 
30          for listener in listeners: 
31              listener.onMouseMove(sender, x, y) 
32      elif type == "mouseover": 
33          from_element = DOM.eventGetFromElement(event) 
34          if not DOM.isOrHasChild(sender.getElement(), from_element): 
35              for listener in listeners: 
36                  listener.onMouseEnter(sender) 
37      elif type == "mouseout": 
38          to_element = DOM.eventGetToElement(event) 
39          if not DOM.isOrHasChild(sender.getElement(), to_element): 
40              for listener in listeners: 
41                  listener.onMouseLeave(sender) 
42   
43  MOUSE_EVENTS = [ "mousedown", "mouseup", "mousemove", "mouseover", "mouseout"] 
44   
45 -class MouseHandler(object): 
46   
47 -    def __init__(self, preventDefault=False): 
48   
49          self._mouseListeners = [] 
50          self._mousePreventDefault = preventDefault 
51          self.sinkEvents( Event.MOUSEEVENTS ) 
52   
53 -    def onBrowserEvent(self, event): 
54          type = DOM.eventGetType(event) 
55          if type in MOUSE_EVENTS: 
56              if self._mousePreventDefault: 
57                  DOM.eventPreventDefault(event) 
58              fireMouseEvent(self._mouseListeners, self, event) 
59   
60 -    def addMouseListener(self, listener): 
61          self._mouseListeners.append(listener) 
62   
63 -    def removeMouseListener(self, listener): 
64          self._mouseListeners.remove(listener) 
65   
66 -    def onMouseMove(self, sender, x, y): 
67          pass 
68           
69 -    def onMouseDown(self, sender, x, y): 
70          pass 
71   
72 -    def onMouseUp(self, sender, x, y): 
73          pass 
74   
75 -    def onMouseEnter(self, sender): 
76          pass 
77   
78 -    def onMouseLeave(self, sender): 
79          pass 
80