/*	Copyright (c) 2004-2006, The Dojo Foundation	All Rights Reserved.	Licensed under the Academic Free License version 2.1 or above OR the	modified BSD license. For more information on Dojo licensing, see:		http://dojotoolkit.org/community/licensing.shtml*/dojo.provide("dojo.animation.Animation");dojo.require("dojo.animation.AnimationEvent");dojo.require("dojo.lang.func");dojo.require("dojo.math");dojo.require("dojo.math.curves");/*Animation package based off of Dan Pupius' work on Animations:http://pupius.co.uk/js/Toolkit.Drawing.js*/dojo.animation.Animation = function(/*dojo.math.curves.Line*/ curve, /*int*/ duration, /*Decimal?*/ accel, /*int?*/ repeatCount, /*int?*/ rate) {	// public properties	if(dojo.lang.isArray(curve)) {		// curve: Array		// id: i		curve = new dojo.math.curves.Line(curve[0], curve[1]);	}	this.curve = curve;	this.duration = duration;	this.repeatCount = repeatCount || 0;	this.rate = rate || 25;	if(accel) {		// accel: Decimal		// id: j		if(dojo.lang.isFunction(accel.getValue)) {			// accel: dojo.math.curves.CatmullRom			// id: k			this.accel = accel;		} else {			var i = 0.35*accel+0.5;	// 0.15 <= i <= 0.85			this.accel = new dojo.math.curves.CatmullRom([[0], [i], [1]], 0.45);		}	}}dojo.lang.extend(dojo.animation.Animation, {	// public properties	curve: null,	duration: 0,	repeatCount: 0,	accel: null,	// events	onBegin: null,	onAnimate: null,	onEnd: null,	onPlay: null,	onPause: null,	onStop: null,	handler: null,	// "private" properties	_animSequence: null,	_startTime: null,	_endTime: null,	_lastFrame: null,	_timer: null,	_percent: 0,	_active: false,	_paused: false,	_startRepeatCount: 0,	// public methods	play: function(gotoStart) {		if( gotoStart ) {			clearTimeout(this._timer);			this._active = false;			this._paused = false;			this._percent = 0;		} else if( this._active && !this._paused ) {			return;		}		this._startTime = new Date().valueOf();		if( this._paused ) {			this._startTime -= (this.duration * this._percent / 100);		}		this._endTime = this._startTime + this.duration;		this._lastFrame = this._startTime;		var e = new dojo.animation.AnimationEvent(this, null, this.curve.getValue(this._percent),			this._startTime, this._startTime, this._endTime, this.duration, this._percent, 0);		this._active = true;		this._paused = false;		if( this._percent == 0 ) {			if(!this._startRepeatCount) {				this._startRepeatCount = this.repeatCount;			}			e.type = "begin";			if(typeof this.handler == "function") { this.handler(e); }			if(typeof this.onBegin == "function") { this.onBegin(e); }		}		e.type = "play";		if(typeof this.handler == "function") { this.handler(e); }		if(typeof this.onPlay == "function") { this.onPlay(e); }		if(this._animSequence) { this._animSequence._setCurrent(this); }		this._cycle();	},	pause: function() {		clearTimeout(this._timer);		if( !this._active ) { return; }		this._paused = true;		var e = new dojo.animation.AnimationEvent(this, "pause", this.curve.getValue(this._percent),			this._startTime, new Date().valueOf(), this._endTime, this.duration, this._percent, 0);		if(typeof this.handler == "function") { this.handler(e); }		if(typeof this.onPause == "function") { this.onPause(e); }	},	playPause: function() {		if( !this._active || this._paused ) {			this.play();		} else {			this.pause();		}	},	gotoPercent: function(pct, andPlay) {		clearTimeout(this._timer);		this._active = true;		this._paused = true;		this._percent = pct;		if( andPlay ) { this.play(); }	},	stop: function(gotoEnd) {		clearTimeout(this._timer);		var step = this._percent / 100;		if( gotoEnd ) {			step = 1;		}		var e = new dojo.animation.AnimationEvent(this, "stop", this.curve.getValue(step),			this._startTime, new Date().valueOf(), this._endTime, this.duration, this._percent);		if(typeof this.handler == "function") { this.handler(e); }		if(typeof this.onStop == "function") { this.onStop(e); }		this._active = false;		this._paused = false;	},	status: function() {		if( this._active ) {			return this._paused ? "paused" : "playing";		} else {			return "stopped";		}	},	// "private" methods	_cycle: function() {		clearTimeout(this._timer);		if( this._active ) {			var curr = new Date().valueOf();			var step = (curr - this._startTime) / (this._endTime - this._startTime);			var fps = 1000 / (curr - this._lastFrame);			this._lastFrame = curr;			if( step >= 1 ) {				step = 1;				this._percent = 100;			} else {				this._percent = step * 100;			}						// Perform accelleration			if(this.accel && this.accel.getValue) {				step = this.accel.getValue(step);			}			var e = new dojo.animation.AnimationEvent(this, "animate", this.curve.getValue(step),				this._startTime, curr, this._endTime, this.duration, this._percent, Math.round(fps));			if(typeof this.handler == "function") { this.handler(e); }			if(typeof this.onAnimate == "function") { this.onAnimate(e); }			if( step < 1 ) {				this._timer = setTimeout(dojo.lang.hitch(this, "_cycle"), this.rate);			} else {				e.type = "end";				this._active = false;				if(typeof this.handler == "function") { this.handler(e); }				if(typeof this.onEnd == "function") { this.onEnd(e); }				if( this.repeatCount > 0 ) {					this.repeatCount--;					this.play(true);				} else if( this.repeatCount == -1 ) {					this.play(true);				} else {					if(this._startRepeatCount) {						this.repeatCount = this._startRepeatCount;						this._startRepeatCount = 0;					}					if( this._animSequence ) {						this._animSequence._playNext();					}				}			}		}	}});