自定义触摸屏的事件种

自定义触摸屏的事件类
(function($) {
   $.fn.touchWizard = function(settings) {
     var config = {
touchLeft: function(e) {
    trace("touchLeft");
},
touchRight: function(e) {
    trace("touchRight:" + e.value);
},
touchUp: function(e) {
    trace("touchUp:" + e.value);
},
touchDown: function(e) {
    trace("touchDown:" + e.value); 
},
touchDrag: function(e) {
},
zoom: function(e) {
    trace("zoom:" + e.value); 
},
dblclick: function(e) {
    trace("dblclick"); 
},
mouseScroll: function(e) {
    trace("mouseScroll:" + e.value); 
},
preventDefaultEvents: true
};
    
     
     if (settings) $.extend(config, settings);

     this.each(function() {
        var min_move_x = 20;
        var min_move_y = 20 ;
        var clickTime = new Date() ;
        var dblInterval = 300 ;
        var isScale = false ;
       
        //计算两点间的距离
        function getPointDistance(x1,y1,x2,y2)
        {
            return Math.round(Math.sqrt(Math.pow(x1-x2,2)+Math.pow(y1-y2,2))) ;
        }
       
       

        function onTouchStart(e) {
            if (e.touches.length > 1)
                return ;
            isScale = false ;

            //dblclick
            var nowTime = new Date() ;
            var t = parseInt(nowTime.getTime() - clickTime.getTime()) ;
           
            if ((t < dblInterval) && (e.touches.length == 1))
            {
               config.dblclick(e) ;
               return ;
            }
            clickTime = nowTime ;
       
            var touches = e.changedTouches ;
            for (var i=0; i < touches.length; i++) {
                var touch = touches[i] ;
                touch.startX = touch.clientX;
                touch.startY = touch.clientY;
            }
            e.stopPropagation();
        }

        function onTouchMove(e) {

        }


        function onTouchEnd(e) {
            if (isScale)
                return ;
           
            var touch = e.changedTouches[0] ;
            touch.endX = touch.clientX ;
            touch.endY = touch.clientY ;
           
            var dx = touch.startX - touch.endX;
            var dy = touch.startY - touch.endY;
            if((Math.abs(dx) >= min_move_x) && (Math.abs(dx)>Math.abs(dy))) {
                e.value = dx ;
                if(dx > 0)
                   config.touchRight(e);
                else
                    config.touchLeft(e);
            }
            else if((Math.abs(dy) >= min_move_y) && (Math.abs(dx)<Math.abs(dy))) {
                e.value = dy ;
                if(dy > 0)
                    config.touchDown(e);
                else
                    config.touchUp(e);
            }
            e.stopPropagation();
        }

       
        function onGestureStart(e){
            isScale = true ;
            e.stopPropagation();
        }
       
        function onGestureEnd(e){
            e.value = e.scale ;
            config.zoom(e);
            e.stopPropagation();
        }
       
        function onMouseWheel(e)
        {
            var value = (/Firefox/i.test(navigator.userAgent))? e.detail : e.wheelDelta ;
            e.value = value ;
            config.mouseScroll(e);
            e.stopPropagation();
        }
       
        //touchstart gesturestart touchstart gestureend touchend touchend
        this.addEventListener("touchstart", onTouchStart, false);
        this.addEventListener("touchmove", onTouchMove, false);
        this.addEventListener("touchend", onTouchEnd, false);
        this.addEventListener("gesturestart", onGestureStart, false);
        this.addEventListener("gestureend", onGestureEnd, false);
        this.addEventListener((/Firefox/i.test(navigator.userAgent))? "DOMMouseScroll" : "mousewheel", onMouseWheel, false);
     });

     return this;
   };

})(jQuery);