Source Code for Module library.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  from pyjamas.EventController import Handler 
 18   
 19 -def fireMouseEvent(listeners, sender, event): 
 20      x = DOM.eventGetClientX(event) - DOM.getAbsoluteLeft(sender.getElement()) 
 21      y = DOM.eventGetClientY(event) - DOM.getAbsoluteTop(sender.getElement()) 
 22   
 23      etype = DOM.eventGetType(event) 
 24      if etype == "mousedown": 
 25          for listener in listeners: 
 26              listener.onMouseDown(sender, x, y) 
 27          return True 
 28      elif etype == "mouseup": 
 29          for listener in listeners: 
 30              listener.onMouseUp(sender, x, y) 
 31          return True 
 32      elif etype == "mousemove": 
 33          for listener in listeners: 
 34              listener.onMouseMove(sender, x, y) 
 35          return True 
 36      elif etype == "mouseover": 
 37          to_element = DOM.eventGetToElement(event) 
 38          if to_element and not DOM.isOrHasChild(sender.getElement(), to_element): 
 39              for listener in listeners: 
 40                  listener.onMouseEnter(sender) 
 41          return True 
 42      elif etype == "mouseout": 
 43          to_element = DOM.eventGetToElement(event) 
 44          if to_element and not DOM.isOrHasChild(sender.getElement(), to_element): 
 45              for listener in listeners: 
 46                  listener.onMouseLeave(sender) 
 47          return True 
 48      return False 
 49   
 50  MOUSE_EVENTS = [ "mousedown", "mouseup", "mousemove", "mouseover", "mouseout"] 
 51   
 52 -class MouseHandler(object): 
 53   
 54 -    def __init__(self, preventDefault=False): 
 55   
 56          self._mouseListeners = [] 
 57          self._mousePreventDefault = preventDefault 
 58          self.sinkEvents( Event.MOUSEEVENTS ) 
 59   
 60 -    def onBrowserEvent(self, event): 
 61          etype = DOM.eventGetType(event) 
 62          if etype in MOUSE_EVENTS: 
 63              if self._mousePreventDefault: 
 64                  DOM.eventPreventDefault(event) 
 65              return fireMouseEvent(self._mouseListeners, self, event) 
 66          return False 
 67   
 68 -    def addMouseListener(self, listener): 
 69          self._mouseListeners.append(listener) 
 70   
 71 -    def removeMouseListener(self, listener): 
 72          self._mouseListeners.remove(listener) 
 73   
 74 -    def onMouseMove(self, sender, x, y): 
 75          pass 
 76   
 77 -    def onMouseDown(self, sender, x, y): 
 78          pass 
 79   
 80 -    def onMouseUp(self, sender, x, y): 
 81          pass 
 82   
 83 -    def onMouseEnter(self, sender): 
 84          pass 
 85   
 86 -    def onMouseLeave(self, sender): 
 87          pass 
 88   
 89 -    def onMouseGlassEnter(self, sender): 
 90          pass 
 91   
 92 -    def onMouseGlassLeave(self, sender): 
 93          pass 
 94   
 95 -class MouseWheelHandler(object): 
 96   
 97 -    def __init__(self, preventDefault=False): 
 98   
 99          self._mouseWheelListeners = [] 
100          self._mouseWheelPreventDefault = preventDefault 
101          self.sinkEvents( Event.ONMOUSEWHEEL ) 
102   
103 -    def onBrowserEvent(self, event): 
104          etype = DOM.eventGetType(event) 
105          if etype == "mousewheel": 
106              if self._mouseWheelPreventDefault: 
107                  DOM.eventPreventDefault(event) 
108              velocity = DOM.eventGetMouseWheelVelocityY(event) 
109              for listener in self._mouseWheelListeners: 
110                  listener.onMouseWheel(self, velocity) 
111              return True 
112   
113 -    def addMouseWheelListener(self, listener): 
114          self._mouseWheelListeners.append(listener) 
115   
116 -    def removeMouseWheelListener(self, listener): 
117          self._mouseWheelListeners.remove(listener) 
118   
119 -    def onMouseWheel(self, sender, velocity): 
120          pass 
121