MPLView.py 文件源码

def __init__(self, *args, **kwargs):
      ui.View.__init__(self, *args, **kwargs)
      self.pinchgesture_recognizer_target = ui.Button()
      self.pinchgesture_recognizer_target.action = self.did_pinch

      self.pangesture_recognizer_target = ui.Button()
      self.pangesture_recognizer_target.action = self.did_pan

      self.gr_delegate=GRDelegate.alloc().init().autorelease()
      self.recognizers={}
      self_objc = ObjCInstance(self)     
      pinchobjctarget=ObjCInstance(self.pinchgesture_recognizer_target)
      panobjctarget=ObjCInstance(self.pangesture_recognizer_target)

      pinchrecognizer = ObjCClass('UIPinchGestureRecognizer').alloc()
      self.recognizers['pinch'] =         pinchrecognizer.initWithTarget_action_( pinchobjctarget, sel('invokeAction:')).autorelease()


      panrecognizer = ObjCClass('UIPanGestureRecognizer').alloc()
      self.recognizers['pan'] =            panrecognizer.initWithTarget_action_( panobjctarget, sel('invokeAction:')).autorelease()
      self.recognizers['pan'].setMinimumNumberOfTouches_(2)

      for r in self.recognizers.values():
         self_objc.addGestureRecognizer_(r)
         r.setDelegate_(self.gr_delegate)
      self.panx,self.pany,self.sx,self.sy=0,0,1,1
      self.panx0,self.pany0,self.sx0,self.sy0=0,0,1,1