//t_txt
//bg_mc 40

//stop()

// txt 		TextField
// bg		background
// dataArr	[str1,str2,...]
// loopNum	dataArr 循环的次数

var typewriter={}
typewriter.main=function(tmc,dataArr,loopNum){
	this.container=tmc;
	this.target = tmc.t_txt;
	this.target.textColor=0x6666cc;
	this.target.filters = [new flash.filters.GlowFilter(0xFFFFFF, 1, 2, 2, 32, 1)]
	//this.target.filters = [new flash.filters.GlowFilter(0x6f89c3, 1, 2, 2, 32, 1)]
	
	
	this.bgMc = tmc.bg_mc;
	this.dbArr=dataArr;
	this.loop = loopNum || 1;
	this.counter = this.loop * this.dbArr.length
	this.idx = 0;
	this.textLength = 1;
	this.textBuffer;			//缓存当前打字字符串
	this.typeTime=50;
	this.showTime=2000;		//打完后停留时间
	this.typeValID;
	this.showValID;
	this.initFlag=false;	//初始化标志
	this.readItem()
}
typewriter.readItem=function(){
	this.textLength =1;
	this.target.text = ""
	this.textBuffer = this.dbArr[this.idx=this.idx>this.dbArr.length-1 ? 0 : this.idx];
	this.idx++;
	
	var w=Math.ceil(this.getTextFieldWidth(this.textBuffer))
	if(w>scr.width) w = scr.width
	this.target._width = w;

	if(!typewriter.initFlag){
		this.container._x=(scr.width-w)/2-15
		//if(this.container._x<32) this.container._x=32
		this.container._y=scr.height-scr.textBgMc._height-16-32
		//this.container._y=scr.textBgMc._height+6
		this.initFlag=true;
	}

	//var t=new mx.transitions.Tween(this.bgMc, "_width", mx.transitions.easing.Elastic.easeOut, 40, w+30, 1, true);
	var t=new mx.transitions.Tween(this.bgMc, "_width", mx.transitions.easing.Regular.easeInOut, 40, w+30, 1, true);
	
	if(this.showValID) clearInterval(this.showValID)	
	this.typeValID = setInterval(this,"type", this.typeTime);
}
typewriter.type=function() {
	this.textLength<=this.textBuffer.length ? this.target.text=substring(this.textBuffer, 1, this.textLength++) : this.nextItem();
}
typewriter.nextItem=function() {
	if(this.typeValID) clearInterval(this.typeValID)
	if(--this.counter>0){
		this.showValID = setInterval(this,"readItem", this.showTime);
	}
}
//获取文本域宽度
typewriter.getTextFieldWidth=function (str:String):Number {
	var txt_fmt:TextFormat= new TextFormat();
	txt_fmt.font = "_sans";
	txt_fmt.size = 14;
	txt_fmt.bold = true;
	var metrics:Object = txt_fmt.getTextExtent(str);
	return metrics.textFieldWidth;
}

/*
typewriter.main(
	imgtip_mc,
	//["可用鼠标中键滚页", "PAGEUP,PAGEDOWN 功能键滚页", "鼠标拖拽内容空白区可以滚页"],
	["PAGEUP,PAGEDOWN 功能键滚页"],
	1
)
*/