tv_xiaoyouxi/games/symdsb/frameworks/cocos2d-html5/CCTouch.js

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 Copyright (c) 2013-2014 Chukong Technologies Inc.

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/**
 * The touch event class
 * @class
 * @extends cc.Class
 *
 * @param {Number} x
 * @param {Number} y
 * @param {Number} id
 */
cc.Touch = cc.Class.extend(/** @lends cc.Touch# */{
    _point:null,
    _prevPoint:null,
    _id:0,
    _startPointCaptured: false,
    _startPoint:null,

    ctor:function (x, y, id) {
        this._point = cc.p(x || 0, y || 0);
        this._id = id || 0;
    },

    /**
     * Returns the current touch location in OpenGL coordinates
     * @return {cc.Point}
     */
    getLocation:function () {
        //TODO
        //return cc.director.convertToGL(this._point);
        return {x: this._point.x, y: this._point.y};
    },

	/**
	 * Returns X axis location value
	 * @returns {number}
	 */
	getLocationX: function () {
		return this._point.x;
	},

	/**
     * Returns Y axis location value
	 * @returns {number}
	 */
	getLocationY: function () {
		return this._point.y;
	},

    /**
     * Returns the previous touch location in OpenGL coordinates
     * @return {cc.Point}
     */
    getPreviousLocation:function () {
        //TODO
        //return cc.director.convertToGL(this._prevPoint);
        return {x: this._prevPoint.x, y: this._prevPoint.y};
    },

    /**
     * Returns the start touch location in OpenGL coordinates
     * @returns {cc.Point}
     */
    getStartLocation: function() {
        //TODO
        //return cc.director.convertToGL(this._startPoint);
        return {x: this._startPoint.x, y: this._startPoint.y};
    },

    /**
     * Returns the delta distance from the previous touche to the current one in screen coordinates
     * @return {cc.Point}
     */
    getDelta:function () {
        return cc.pSub(this._point, this._prevPoint);
    },

    /**
     * Returns the current touch location in screen coordinates
     * @return {cc.Point}
     */
    getLocationInView: function() {
        return {x: this._point.x, y: this._point.y};
    },

    /**
     * Returns the previous touch location in screen coordinates
     * @return {cc.Point}
     */
    getPreviousLocationInView: function(){
        return {x: this._prevPoint.x, y: this._prevPoint.y};
    },

    /**
     * Returns the start touch location in screen coordinates
     * @return {cc.Point}
     */
    getStartLocationInView: function(){
        return {x: this._startPoint.x, y: this._startPoint.y};
    },

    /**
     * Returns the id of cc.Touch
     * @return {Number}
     */
    getID:function () {
        return this._id;
    },

    /**
     * Returns the id of cc.Touch
     * @return {Number}
     * @deprecated since v3.0, please use getID() instead
     */
    getId:function () {
        cc.log("getId is deprecated. Please use getID instead.")
        return this._id;
    },

    /**
     * Sets information to touch
     * @param {Number} id
     * @param  {Number} x
     * @param  {Number} y
     */
    setTouchInfo:function (id, x, y) {
        this._prevPoint = this._point;
        this._point = cc.p(x || 0, y || 0);
        this._id = id;
        if(!this._startPointCaptured){
            this._startPoint = cc.p(this._point);
            this._startPointCaptured = true;
        }
    },

    _setPoint: function(x, y){
        if(y === undefined){
            this._point.x = x.x;
            this._point.y = x.y;
        }else{
            this._point.x = x;
            this._point.y = y;
        }
    },

    _setPrevPoint:function (x, y) {
        if(y === undefined)
            this._prevPoint = cc.p(x.x, x.y);
        else
            this._prevPoint = cc.p(x || 0, y || 0);
    }
});