/*
Open source under the BSD License.
Copyright (c) 2001 Robert Penner
JavaScript version copyright (C) 2006 by Philippe Maegerman
All rights reserved.
*/
function Delegate() {}
Delegate.create = function (o, f) {
    var a = new Array() ;
    var l = arguments.length ;
    for(var i = 2 ; i < l ; i++) a[i - 2] = arguments[i] ;
    return function() {
        var aP = [].concat(arguments, a) ;
        f.apply(o, aP);
    }
}

Tween = function(obj, prop, func, begin, finish, duration, suffixe){
    this.init(obj, prop, func, begin, finish, duration, suffixe)
}
var t = Tween.prototype;

t.obj = new Object();
t.prop='';
t.func = function (t, b, c, d) { return c*t/d + b; };
t.begin = 0;
t.change = 0;
t.prevTime = 0;
t.prevPos = 0;
t.looping = false;
t._duration = 0;
t._time = 0;
t._pos = 0;
t._position = 0;
t._startTime = 0;
t._finish = 0;
t.name = '';
t.suffixe = '';
t._listeners = new Array(); 
t.setTime = function(t){
    this.prevTime = this._time;
    if (t > this.getDuration()) {
        if (this.looping) {
            this.rewind (t - this._duration);
            this.update();
            this.broadcastMessage('onMotionLooped',{target:this,type:'onMotionLooped'});
        } else {
            this._time = this._duration;
            this.update();
            this.stop();
            this.broadcastMessage('onMotionFinished',{target:this,type:'onMotionFinished'});
        }
    } else if (t < 0) {
        this.rewind();
        this.update();
    } else {
        this._time = t;
        this.update();
    }
}
t.getTime = function(){
    return this._time;
}
t.setDuration = function(d){
    this._duration = (d == null || d <= 0) ? 100000 : d;
}
t.getDuration = function(){
    return this._duration;
}
t.setPosition = function(p){
    this.prevPos = this._pos;
    var a = this.suffixe != '' ? this.suffixe : '';
    this.obj[this.prop] = Math.round(p) + a;
    this._pos = p;
    this.broadcastMessage('onMotionChanged',{target:this,type:'onMotionChanged'});
}
t.getPosition = function(t){
    if (t == undefined) t = this._time;
    return this.func(t, this.begin, this.change, this._duration);
};
t.setFinish = function(f){
    this.change = f - this.begin;
};
t.geFinish = function(){
    return this.begin + this.change;
};
t.init = function(obj, prop, func, begin, finish, duration, suffixe){
    if (!arguments.length) return;
    this._listeners = new Array();
    this.addListener(this);
    if(suffixe) this.suffixe = suffixe;
    this.obj = obj;
    this.prop = prop;
    this.begin = begin;
    this._pos = begin;
    this.setDuration(duration);
    if (func!=null && func!='') {
        this.func = func;
    }
    this.setFinish(finish);
}
t.start = function(){
    this.rewind();
    this.startEnterFrame();
    this.broadcastMessage('onMotionStarted',{target:this,type:'onMotionStarted'});
    //alert('in');
}
t.rewind = function(t){
    this.stop();
    this._time = (t == undefined) ? 0 : t;
    this.fixTime();
    this.update();
}
t.fforward = function(){
    this._time = this._duration;
    this.fixTime();
    this.update();
}
t.update = function(){
    this.setPosition(this.getPosition(this._time));
    }
t.startEnterFrame = function(){
    this.stopEnterFrame();
    this.isPlaying = true;
    this.onEnterFrame();
}
t.onEnterFrame = function(){
    if(this.isPlaying) {
        this.nextFrame();
        setTimeout(Delegate.create(this, this.onEnterFrame), 0);
    }
}
t.nextFrame = function(){
    this.setTime((this.getTimer() - this._startTime) / 1000);
    }
t.stop = function(){
    this.stopEnterFrame();
    this.broadcastMessage('onMotionStopped',{target:this,type:'onMotionStopped'});
}
t.stopEnterFrame = function(){
    this.isPlaying = false;
}

t.continueTo = function(finish, duration){
    this.begin = this._pos;
    this.setFinish(finish);
    if (this._duration != undefined)
        this.setDuration(duration);
    this.start();
}
t.resume = function(){
    this.fixTime();
    this.startEnterFrame();
    this.broadcastMessage('onMotionResumed',{target:this,type:'onMotionResumed'});
}
t.yoyo = function (){
    this.continueTo(this.begin,this._time);
}

t.addListener = function(o){
    this.removeListener (o);
    return this._listeners.push(o);
}
t.removeListener = function(o){
    var a = this._listeners;    
    var i = a.length;
    while (i--) {
        if (a[i] == o) {
            a.splice (i, 1);
            return true;
        }
    }
    return false;
}
t.broadcastMessage = function(){
    var arr = new Array();
    for(var i = 0; i < arguments.length; i++){
        arr.push(arguments[i])
    }
    var e = arr.shift();
    var a = this._listeners;
    var l = a.length;
    for (var i=0; i<l; i++){
        if(a[i][e] && a[i][e].apply)
            a[i][e].apply(a[i], arr);
    }
}
t.fixTime = function(){
    this._startTime = this.getTimer() - this._time * 1000;
}
t.getTimer = function(){
    return new Date().getTime() - this._time;
}
Tween.backEaseIn = function(t,b,c,d,a,p){
    if (s == undefined) var s = 1.70158;
    return c*(t/=d)*t*((s+1)*t - s) + b;
}
Tween.backEaseOut = function(t,b,c,d,a,p){
    if (s == undefined) var s = 1.70158;
    return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
}
Tween.backEaseInOut = function(t,b,c,d,a,p){
    if (s == undefined) var s = 1.70158; 
    if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
    return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
}
Tween.elasticEaseIn = function(t,b,c,d,a,p){
        if (t==0) return b;  
        if ((t/=d)==1) return b+c;  
        if (!p) p=d*.3;
        if (!a || a < Math.abs(c)) {
            a=c; var s=p/4;
        }
        else 
            var s = p/(2*Math.PI) * Math.asin (c/a);
        
        return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
    
}
Tween.elasticEaseOut = function (t,b,c,d,a,p){
        if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
        if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
        else var s = p/(2*Math.PI) * Math.asin (c/a);
        return (a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b);
    }
Tween.elasticEaseInOut = function (t,b,c,d,a,p){
    if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) var p=d*(.3*1.5);
    if (!a || a < Math.abs(c)) {var a=c; var s=p/4; }
    else var s = p/(2*Math.PI) * Math.asin (c/a);
    if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
    return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
}

Tween.bounceEaseOut = function(t,b,c,d){
    if ((t/=d) < (1/2.75)) {
        return c*(7.5625*t*t) + b;
    } else if (t < (2/2.75)) {
        return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
    } else if (t < (2.5/2.75)) {
        return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
    } else {
        return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
    }
}
Tween.bounceEaseIn = function(t,b,c,d){
    return c - Tween.bounceEaseOut (d-t, 0, c, d) + b;
    }
Tween.bounceEaseInOut = function(t,b,c,d){
    if (t < d/2) return Tween.bounceEaseIn (t*2, 0, c, d) * .5 + b;
    else return Tween.bounceEaseOut (t*2-d, 0, c, d) * .5 + c*.5 + b;
    }

Tween.strongEaseInOut = function(t,b,c,d){
    return c*(t/=d)*t*t*t*t + b;
    }

Tween.regularEaseIn = function(t,b,c,d){
    return c*(t/=d)*t + b;
    }
Tween.regularEaseOut = function(t,b,c,d){
    return -c *(t/=d)*(t-2) + b;
    }

Tween.regularEaseInOut = function(t,b,c,d){
    if ((t/=d/2) < 1) return c/2*t*t + b;
    return -c/2 * ((--t)*(t-2) - 1) + b;
    }
Tween.strongEaseIn = function(t,b,c,d){
    return c*(t/=d)*t*t*t*t + b;
    }
Tween.strongEaseOut = function(t,b,c,d){
    return c*((t=t/d-1)*t*t*t*t + 1) + b;
    }

Tween.strongEaseInOut = function(t,b,c,d){
    if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
    return c/2*((t-=2)*t*t*t*t + 2) + b;
    }