/** @language english
 * The LMultitouch class manages and provides information about the current environment's support for handling contact from user input devices, including contact that has two or more touch points (such as a user's fingers on a touch screen). When a user interacts with a device such as a mobile phone or tablet with a touch screen, the user typically touches the screen with his or her fingers or a pointing device. While there is a broad range of pointing devices, such as a mouse or a stylus, many of these devices only have a single point of contact with an application. For pointing devices with a single point of contact, user interaction events can be handled as a mouse event, or using a basic set of touch events (called "touch point" events).
 * @class LMultitouch
 * @constructor
 * @since 1.8.9
 * 	LInit(1000/50,"legend",800,450,main);
 * 	var layer,backLayer,touchPointIDList = [];
 * 	function main () {
 * 		if(LGlobal.canTouch){
 * 				LGlobal.stageScale = LStageScaleMode.EXACT_FIT;
 * 					LSystem.screen(LStage.FULL_SCREEN);
 * 		}
 * 		LMultitouch.inputMode = LMultitouchInputMode.TOUCH_POINT;
 * 		layer = new LSprite();
 * 		layer.graphics.drawRect(2,"#ffffff",[0,0,LGlobal.width,LGlobal.height],true,"#ffffff");
 * 		addChild(layer);
 * 		backLayer = new LSprite();
 * 		backLayer.y = 50;
 * 		layer.addChild(backLayer);
 * 		var txtLabel = new LTextField();
 * 		txtLabel.size = 18;
 * 		txtLabel.x = 10;
 * 		txtLabel.y = 5;
 * 		layer.addChild(txtLabel);
 * 		if(!LGlobal.canTouch){
 * 			txtLabel.text = "多点触屏测试：请用手机或平板电脑测试";
 * 		}else{
 * 			txtLabel.text = "多点触屏测试：请点击屏幕进行测试";
 * 		}
 * 		layer.addEventListener(LMouseEvent.MOUSE_DOWN,addTouchPointID);
 * 		layer.addEventListener(LMouseEvent.MOUSE_MOVE,addTouchPointID);
 * 		layer.addEventListener(LMouseEvent.MOUSE_UP,removeTouchPointID);
 * 	}
 * 	function addTouchPointID(e){
 * 		var f = false;
 * 		for(var i=0;i<touchPointIDList.length;i++){
 * 			if(touchPointIDList[i].touchPointID == e.touchPointID){
 * 				touchPointIDList[i] = e;
 * 				f = true;
 * 				break;
 * 			}
 * 		}
 * 		if(!f)touchPointIDList.push(e);
 * 		draw();
 * 	}
 * 	function removeTouchPointID(e){
 * 		for(var i=0;i<touchPointIDList.length;i++){
 * 			if(touchPointIDList[i].touchPointID == e.touchPointID){
 * 				touchPointIDList.splice(i,1);
 * 				break;
 * 			}
 * 		}
 * 		draw();
 * 	}
 * 	function draw(){
 * 		backLayer.removeAllChild();
 * 		for(var i=0;i<touchPointIDList.length;i++){
 * 			var eve = touchPointIDList[i];
 * 			var title = new LTextField();
 * 			title.text = "id:"+eve.touchPointID+","+eve.offsetX+","+eve.offsetY;
 * 			title.size = 18;
 * 			title.x = 10;
 * 			title.y = i*23;
 * 			backLayer.addChild(title);
 * 		}
 * 	}
 * @examplelink <p><a href="../../../api/LMultitouch/index.html" target="_blank">Try it »</a></p>
 * @public
 */
var LMultitouch = function () {throw "LMultitouch cannot be instantiated";};
/** @language english
 * Identifies the multi-touch mode for touch and gesture event handling. To set this property, use values from the LMultitouchInputMode class.
 * @property inputMode
 * @type String
 * @default none
 * @since 1.8.9
 * @public
 */
LMultitouch.inputMode = "none";
LMultitouch.touchs = [];