/*////////////
Sequence
Author: Philippe Maegerman
Email: mx2004-at-pandora.be
Creation Date: January 20 2006
*/////////////
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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);
	}
}
function Sequence(){
	this.children = new Array();
	this.currentChildIndex = 0;
	this._listeners = new Array();
	this.nextObject = new Object();
	this.addListener(this);
}
var s = Sequence.prototype;
s.addChild = function(tween){
	this.children.push(tween)
}
s.removeChild = function(tween){
	var a = this.children;	
	var i = a.length;
	while (i--) {
		if (a[i] == tween) {
			a.splice (i, 1);
			return true;
		}
	}
	return false;
}
s.start = function(){
	this.rewind();
	this.play();
	this.broadcastMessage('onMotionStarted',{target:this,type:'onMotionStarted'});
}
s.next = function(){
	this.children[this.currentChildIndex].removeListener(this.nextObject);
	if(this.currentChildIndex < this.children.length-1){
		this.currentChildIndex++;
		this.play();
	}
	else{
		this.stop();
		this.broadcastMessage('onMotionFinished',{target:this,type:'onMotionFinished'});
	}
}
s.play = function(){
	this.nextObject = new Object();
	this.nextObject.onMotionFinished = Delegate.create(this, this.next);
	this.children[this.currentChildIndex].addListener(this.nextObject);
	this.children[this.currentChildIndex].start();
}
s.stop = function(){
	this.children[this.currentChildIndex].stop();
	this.broadcastMessage('onMotionStopped',{target:this,type:'onMotionStopped'});
}
s.rewind = function(){
	this.children[this.currentChildIndex].removeListener(this.nextObject);
	this.currentChildIndex = 0;
	for(var i = 0; i < this.children.length; i++){
		this.children[i].rewind();
	}
}
s.fforward = function(){
	this.children[this.currentChildIndex].removeListener(this.nextObject);
	for(var i = 0; i < this.children.length; i++){
		this.children[i].fforward();
	}
	this.currentChildIndex = this.children.length - 1;
}
s.resume = function(){
	this.children[this.currentChildIndex].resume();
	this.broadcastMessage('onMotionResumed',{target:this,type:'onMotionStopped'});
}
s.addListener = function(o){
	this.removeListener (o);
	return this._listeners.push(o);

}
s.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;
}
s.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], arr);
	}
}