Source Code for Module mouseHandler

  1  #mouseHandler.py 
  2  #A part of NonVisual Desktop Access (NVDA) 
  3  #Copyright (C) 2006-2007 NVDA Contributors <http://www.nvda-project.org/> 
  4  #This file is covered by the GNU General Public License. 
  5  #See the file COPYING for more details. 
  6   
  7  import time 
  8  import tones 
  9  import ctypes 
 10  import winUser 
 11  import queueHandler 
 12  import api 
 13  import screenBitmap 
 14  import speech 
 15  import globalVars 
 16  import eventHandler 
 17  from logHandler import log 
 18  import config 
 19  import winInputHook 
 20   
 21  WM_MOUSEMOVE=0x0200 
 22  WM_LBUTTONDOWN=0x0201 
 23  WM_LBUTTONUP=0x0202 
 24  WM_LBUTTONDBLCLK=0x0203 
 25  WM_RBUTTONDOWN=0x0204 
 26  WM_RBUTTONUP=0x0205 
 27  WM_RBUTTONDBLCLK=0x0206 
 28   
 29  curMousePos=(0,0) 
 30  mouseMoved=False 
 31  curMouseShape="" 
 32  mouseShapeChanged=0 
 33  scrBmpObj=None 
 34  #: The time (in seconds) at which the last mouse event occurred. 
 35  #: @type: float 
 36  lastMouseEventTime=0 
 37   
 38 -def updateMouseShape(name): 
 39          global curMouseShape, mouseShapeChanged 
 40          if not name or name==curMouseShape: 
 41                  return 
 42          curMouseShape=name 
 43          mouseShapeChanged=1 
 44   
 45 -def playAudioCoordinates(x, y, screenWidth, screenHeight, detectBrightness=True,blurFactor=0): 
 46          minPitch=config.conf['mouse']['audioCoordinates_minPitch'] 
 47          maxPitch=config.conf['mouse']['audioCoordinates_maxPitch'] 
 48          curPitch=minPitch+((maxPitch-minPitch)*((screenHeight-y)/float(screenHeight))) 
 49          if detectBrightness: 
 50                  startX=min(max(x-blurFactor,0),screenWidth) 
 51                  width=min((x+blurFactor+1)-startX,screenWidth) 
 52                  startY=min(max(y-blurFactor,0),screenHeight) 
 53                  height=min((y+blurFactor+1)-startY,screenHeight) 
 54                  grey=screenBitmap.rgbPixelBrightness(scrBmpObj.captureImage(startX,startY,width,height)[0][0]) 
 55                  brightness=grey/255.0 
 56                  minBrightness=config.conf['mouse']['audioCoordinates_minVolume'] 
 57                  maxBrightness=config.conf['mouse']['audioCoordinates_maxVolume'] 
 58                  brightness=(brightness*(maxBrightness-minBrightness))+minBrightness 
 59          else: 
 60                  brightness=config.conf['mouse']['audioCoordinates_maxVolume'] 
 61          leftVolume=int((85*((screenWidth-float(x))/screenWidth))*brightness) 
 62          rightVolume=int((85*(float(x)/screenWidth))*brightness) 
 63          tones.beep(curPitch,40,left=leftVolume,right=rightVolume) 
 64   
 65  #Internal mouse event 
 66   
 67 -def internal_mouseEvent(msg,x,y,injected): 
 68          global mouseMoved, curMousePos, lastMouseEventTime 
 69          lastMouseEventTime=time.time() 
 70          if injected: 
 71                  return True 
 72          if not config.conf['mouse']['enableMouseTracking']: 
 73                  return True 
 74          try: 
 75                  curMousePos=(x,y) 
 76                  if msg==WM_MOUSEMOVE:  
 77                          mouseMoved=True 
 78                  elif msg in (WM_LBUTTONDOWN,WM_RBUTTONDOWN): 
 79                          queueHandler.queueFunction(queueHandler.eventQueue,speech.cancelSpeech) 
 80          except: 
 81                  log.error("", exc_info=True) 
 82          return True 
 83   
 84 -def executeMouseMoveEvent(x,y): 
 85          global currentMouseWindow 
 86          desktopObject=api.getDesktopObject() 
 87          screenLeft,screenTop,screenWidth,screenHeight=desktopObject.location 
 88          x=min(max(screenLeft,x),(screenLeft+screenWidth)-1) 
 89          y=min(max(screenTop,y),(screenTop+screenHeight)-1) 
 90          if config.conf["mouse"]["audioCoordinatesOnMouseMove"]: 
 91                  playAudioCoordinates(x,y,screenWidth,screenHeight,config.conf['mouse']['audioCoordinates_detectBrightness'],config.conf['mouse']['audioCoordinates_blurFactor']) 
 92          oldMouseObject=api.getMouseObject() 
 93          mouseObject=desktopObject.objectFromPoint(x,y) 
 94          while mouseObject and mouseObject.beTransparentToMouse: 
 95                  mouseObject=mouseObject.parent 
 96          if not mouseObject: 
 97                  return 
 98          if oldMouseObject==mouseObject: 
 99                  mouseObject=oldMouseObject 
100          else: 
101                  api.setMouseObject(mouseObject) 
102          try: 
103                  eventHandler.executeEvent("mouseMove",mouseObject,x=x,y=y) 
104                  oldMouseObject=mouseObject 
105          except: 
106                  log.error("api.notifyMouseMoved", exc_info=True) 
107   
108  #Register internal mouse event 
109   
110 -def initialize(): 
111          global curMousePos, scrBmpObj 
112          scrBmpObj=screenBitmap.ScreenBitmap(1,1) 
113          (x,y)=winUser.getCursorPos() 
114          desktopObject=api.getDesktopObject() 
115          try: 
116                  mouseObject=desktopObject.objectFromPoint(x,y) 
117          except: 
118                  log.exception("Error retrieving initial mouse object") 
119                  mouseObject=None 
120          if not mouseObject: 
121                  mouseObject=api.getDesktopObject() 
122          api.setMouseObject(mouseObject) 
123          curMousePos=(x,y) 
124          winInputHook.initialize() 
125          winInputHook.setCallbacks(mouse=internal_mouseEvent) 
126   
127 -def pumpAll(): 
128          global mouseMoved, curMousePos, mouseShapeChanged, curMouseShape 
129          if mouseMoved: 
130                  mouseMoved=False 
131                  (x,y)=curMousePos 
132                  executeMouseMoveEvent(x,y) 
133          if config.conf["mouse"]["reportMouseShapeChanges"] and mouseShapeChanged>0: 
134                  if mouseShapeChanged==10: 
135                          mouseShapeChanged=0 
136                          speech.speakMessage(_("%s cursor")%curMouseShape) 
137                  else: 
138                          mouseShapeChanged+=1 
139   
140 -def terminate(): 
141          global scrBmpObj 
142          scrBmpObj=None 
143          winInputHook.terminate() 
144