animation.js

1.. 需要jdom.jar和bsf.jar,否则无法跟spring整合. 2.. dwr生成的javascript函数会自动加一个回调函数的参数,如原来的函数是checkExist(String

            this.runtimeAttributes = {};
            for (var attr in this.attributes) {
                this.setRuntimeAttribute(attr);
            }
            
            isAnimated = true;
            actualFrames = 0;
            startTime = new Date(); 
        };
        
        /**
         * Feeds the starting and ending values for each animated attribute to doMethod once per frame, then applies the resulting value to the attribute(s).
         * @private
         */
         
        var onTween = function() {
            var data = {
                duration: new Date() - this.getStartTime(),
                currentFrame: this.currentFrame
            };
            
            data.toString = function() {
                return (
                    'duration: ' + data.duration +
                    ', currentFrame: ' + data.currentFrame
                );
            };
            
            this.onTween.fire(data);
            
            var runtimeAttributes = this.runtimeAttributes;
            
            for (var attr in runtimeAttributes) {
                this.setAttribute(attr, this.doMethod(attr, runtimeAttributes[attr].start, runtimeAttributes[attr].end), runtimeAttributes[attr].unit); 
            }
            
            actualFrames += 1;
        };
        
        var onComplete = function() {
            var actual_duration = (new Date() - startTime) / 1000 ;
            
            var data = {
                duration: actual_duration,
                frames: actualFrames,
                fps: actualFrames / actual_duration
            };
            
            data.toString = function() {
                return (
                    'duration: ' + data.duration +
                    ', frames: ' + data.frames +
                    ', fps: ' + data.fps
                );
            };
            
            isAnimated = false;
            actualFrames = 0;
            this.onComplete.fire(data);
        };
        
        /**
         * Custom event that fires after onStart, useful in subclassing
         * @private
         */    
        this._onStart = new YAHOO.util.CustomEvent('_start', this, true);

        /**
         * Custom event that fires when animation begins
         * Listen via subscribe method (e.g. myAnim.onStart.subscribe(someFunction)
         * @event onStart
         */    
        this.onStart = new YAHOO.util.CustomEvent('start', this);
        
        /**
         * Custom event that fires between each frame
         * Listen via subscribe method (e.g. myAnim.onTween.subscribe(someFunction)
         * @event onTween
         */
        this.onTween = new YAHOO.util.CustomEvent('tween', this);
        
        /**
         * Custom event that fires after onTween
         * @private
         */
        this._onTween = new YAHOO.util.CustomEvent('_tween', this, true);
        
        /**
         * Custom event that fires when animation ends
         * Listen via subscribe method (e.g. myAnim.onComplete.subscribe(someFunction)
         * @event onComplete
         */
        this.onComplete = new YAHOO.util.CustomEvent('complete', this);
        /**
         * Custom event that fires after onComplete
         * @private
         */
        this._onComplete = new YAHOO.util.CustomEvent('_complete', this, true);

        this._onStart.subscribe(onStart);
        this._onTween.subscribe(onTween);
        this._onComplete.subscribe(onComplete);
    }
};

/**
 * Handles animation queueing and threading.
 * Used by Anim and subclasses.
 * @class AnimMgr
 * @namespace YAHOO.util
 */
YAHOO.util.AnimMgr = new function() {
    /** 
     * Reference to the animation Interval.
     * @property thread
     * @private
     * @type Int
     */
    var thread = null;
    
    /** 
     * The current queue of registered animation objects.
     * @property queue
     * @private
     * @type Array
     */    
    var queue = [];

    /** 
     * The number of active animations.
     * @property tweenCount
     * @private
     * @type Int
     */        
    var tweenCount = 0;

    /** 
     * Base frame rate (frames per second). 
     * Arbitrarily high for better x-browser calibration (slower browsers drop more frames).
     * @property fps
     * @type Int
     * 
     */
    this.fps = 1000;

    /** 
     * Interval delay in milliseconds, defaults to fastest possible.
     * @property delay
     * @type Int
     * 
     */
    this.delay = 1;

    /**
     * Adds an animation instance to the animation queue.
     * All animation instances must be registered in order to animate.
     * @method registerElement
     * @param {object} tween The Anim instance to be be registered
     */
    this.registerElement = function(tween) {
        queue[queue.length] = tween;
        tweenCount += 1;
        tween._onStart.fire();
        this.start();
    };
    
    /**
     * removes an animation instance from the animation queue.
     * All animation instances must be registered in order to animate.
     * @method unRegister
     * @param {object} tween The Anim instance to be be registered
     * @param {Int} index The index of the Anim instance
     * @private
     */
    this.unRegister = function(tween, index) {
        tween._onComplete.fire();
        index = index || getIndex(tween);
        if (index != -1) {
            queue.splice(index, 1);
        }
        
        tweenCount -= 1;
        if (tweenCount <= 0) {
            this.stop();
        }
    };
    
    /**
     * Starts the animation thread.
	* Only one thread can run at a time.
     * @method start
     */    
    this.start = function() {
        if (thread === null) {
            thread = setInterval(this.run, this.delay);
        }
    };

    /**
     * Stops the animation thread or a specific animation instance.
     * @method stop
     * @param {object} tween A specific Anim instance to stop (optional)
     * If no instance given, Manager stops thread and all animations.
     */    
    this.stop = function(tween) {
        if (!tween) {
            clearInterval(thread);
            
            for (var i = 0, len = queue.length; i < len; ++i) {
                if ( queue[0].isAnimated() ) {
                    this.unRegister(queue[0], 0);  
                }
            }

            queue = [];
            thread = null;
            tweenCount = 0;
        }
        else {
            this.unRegister(tween);
        }
    };
    
    /**
     * Called per Interval to handle each animation frame.
     * @method run
     */    
    this.run = function() {
        for (var i = 0, len = queue.length; i < len; ++i) {
            var tween = queue[i];
            if ( !tween || !tween.isAnimated() ) { continue; }

            if (tween.currentFrame < tween.totalFrames || tween.totalFrames === null)
            {
                tween.currentFrame += 1;
                
                if (tween.useSeconds) {
                    correctFrame(tween);
                }
                tween._onTween.fire();          
            }
            else { YAHOO.util.AnimMgr.stop(tween, i); }
        }
    };
    
    var getIndex = function(anim) {
        for (var i = 0, len = queue.length; i < len; ++i) {
            if (queue[i] == anim) {
                return i; // note return;
            }
        }
        return -1;
    };
    
    /**
     * On the fly frame correction to keep animation on time.
     * @method correctFrame
     * @private
     * @param {Object} tween The Anim instance being corrected.
     */
    var correctFrame = function(tween) {
        var frames = tween.totalFrames;
        var frame = tween.currentFrame;
        var expected = (tween.currentFrame * tween.duration * 1000 / tween.totalFrames);
        var elapsed = (new Date() - tween.getStartTime());
        var tweak = 0;
        
        if (elapsed < tween.duration * 1000) { // check if falling behind
            tweak = Math.round((elapsed / expected - 1) * tween.currentFrame);
        } else { // went over duration, so jump to end
            tweak = frames - (frame + 1); 
        }
        if (tweak > 0 && isFinite(tweak)) { // adjust if needed
            if (tween.currentFrame + tweak >= frames) {// dont go past last frame
                tweak = frames - (frame + 1);
            }
            
            tween.currentFrame += tweak;      
        }
    };
};
/**
 * Used to calculate Bezier splines for any number of control points.
 * @class Bezier
 * @namespace YAHOO.util
 *
 */
YAHOO.util.Bezier = new function() {
    /**
     * Get the current position of the animated element based on t.
     * Each point is an array of "x" and "y" values (0 = x, 1 = y)
     * At least 2 points are required (start and end).
     * First point is start. Last point is end.
     * Additional control points are optional.     
     * @method getPosition
     * @param {Array} points An array containing Bezier points
     * @param {Number} t A number between 0 and 1 which is the basis for determining current position
     * @return {Array} An array containing int x and y member data
     */
    this.getPosition = function(points, t) {  
        var n = points.length;
        var tmp = [];

        for (var i = 0; i < n; ++i){
            tmp[i] = [points[i][0], points[i][1]]; // save input
        }
        
        for (var j = 1; j < n; ++j) {
            for (i = 0; i < n - j; ++i) {
                tmp[i][0] = (1 - t) * tmp[i][0] + t * tmp[parseInt(i + 1, 10)][0];
                tmp[i][1] = (1 - t) * tmp[i][1] + t * tmp[parseInt(i + 1, 10)][1]; 
            }
        }
    
        return [ tmp[0][0], tmp[0][1] ]; 
    
    };
};
(function() {
/**
 * Anim subclass for color transitions.
 * <p>Usage: <code>var myAnim = new Y.ColorAnim(el, { backgroundColor: { from: '#FF0000', to: '#FFFFFF' } }, 1, Y.Easing.easeOut);</code> Color values can be specified with either 112233, #112233, 
 * [255,255,255], or rgb(255,255,255)</p>
 * @class ColorAnim
 * @namespace YAHOO.util
 * @requires YAHOO.util.Anim
 * @requires YAHOO.util.AnimMgr
 * @requires YAHOO.util.Easing
 * @requires YAHOO.util.Bezier
 * @requires YAHOO.util.Dom
 * @requires YAHOO.util.Event
 * @constructor
 * @extends YAHOO.util.Anim
 * @param {HTMLElement | String} el Reference to the element that will be animated
 * @param {Object} attributes The attribute(s) to be animated.
 * Each attribute is an object with at minimum a "to" or "by" member defined.
 * Additional optional members are "from" (defaults to current value), "units" (defaults to "px").
 * All attribute names use camelCase.
 * @param {Number} duration (optional, defaults to 1 second) Length of animation (frames or seconds), defaults to time-based
 * @param {Function} method (optional, defaults to YAHOO.util.Easing.easeNone) Computes the values that are applied to the attributes per frame (generally a YAHOO.util.Easing method)
 */
    YAHOO.util.ColorAnim = function(el, attributes, duration,  method) {