var $ = function (id) {
    return "string" == typeof id ? document.getElementById(id) : id;
};

var Class = {
  create: function() {
    return function() {
      this.initialize.apply(this, arguments);
    }
  }
}

Object.extend = function(destination, source) {
    for (var property in source) {
        destination[property] = source[property];
    }
    return destination;
}

var TransformView = Class.create();
TransformView.prototype = {
  //,,л,л
  initialize: function(container, slider, parameter, count, options) {
    if(parameter <= 0 || count <= 0) return;
    var oContainer = $(container), oSlider = $(slider), oThis = this;

    this.Index = 0;//ǰ

    this._timer = null;//ʱ
    this._slider = oSlider;//
    this._parameter = parameter;//л
    this._count = count || 0;//л
    this._target = 0;//Ŀ

    this.SetOptions(options);

    this.Up = !!this.options.Up;
    this.Step = Math.abs(this.options.Step);
    this.Time = Math.abs(this.options.Time);
    this.Auto = !!this.options.Auto;
    this.Pause = Math.abs(this.options.Pause);
    this.onStart = this.options.onStart;
    this.onFinish = this.options.onFinish;

    oContainer.style.overflow = "hidden";
    oContainer.style.position = "relative";

    oSlider.style.position = "absolute";
    oSlider.style.top = oSlider.style.left = 0;
  },
  //Ĭ
  SetOptions: function(options) {
    this.options = {//Ĭֵ
        Up:         true,//Ƿ()
        Step:       7,//仯
        Time:       35,//ʱ
        Auto:       true,//ǷԶת
        Pause:      5000,//ͣʱ(AutoΪtrueʱЧ)
        onStart:    function(){},//ʼתʱִ
        onFinish:   function(){}//תʱִ
    };
    Object.extend(this.options, options || {});
  },
  //ʼл
  Start: function() {
    if(this.Index < 0){
        this.Index = this._count - 1;
    } else if (this.Index >= this._count){ this.Index = 0; }

    this._target = -1 * this._parameter * this.Index;
    this.onStart();
    this.Move();
  },
  //ƶ
  Move: function() {
    clearTimeout(this._timer);
    var oThis = this, style = this.Up ? "top" : "left", iNow = parseInt(this._slider.style[style]) || 0, iStep = this.GetStep(this._target, iNow);

    if (iStep != 0) {
        this._slider.style[style] = (iNow + iStep) + "px";
        this._timer = setTimeout(function(){ oThis.Move(); }, this.Time);
    } else {
        this._slider.style[style] = this._target + "px";
        this.onFinish();
        if (this.Auto) { this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause); }
    }
  },
  //ȡ
  GetStep: function(iTarget, iNow) {
    var iStep = (iTarget - iNow) / this.Step;
    if (iStep == 0) return 0;
    if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1);
    return iStep;
  },
  //ֹͣ
  Stop: function(iTarget, iNow) {
    clearTimeout(this._timer);
    this._slider.style[this.Up ? "top" : "left"] = this._target + "px";
  }
};

window.onload=function(){
    function Each(list, fun){
        for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
    };


    ////////////////////////test2

    var objs2 = $("idNum12").getElementsByTagName("li");

    var tv2 = new TransformView("idTransformView2", "idSlider2", 365, 3, {
        onStart: function(){ Each(objs2, function(o, i){ o.className = tv2.Index == i ? "on" : ""; }) },//ťʽ
        Up: false
    });

    tv2.Start();

    Each(objs2, function(o, i){
        o.onmouseover = function(){
            o.className = "on";
            tv2.Auto = false;
            tv2.Index = i;
            tv2.Start();
        }
        o.onmouseout = function(){
            o.className = "";
            tv2.Auto = true;
            tv2.Start();
        }
    })

    $("idStop1").onclick = function(){ tv2.Auto = false; tv2.Stop(); }
    $("idStart1").onclick = function(){ tv2.Auto = true; tv2.Start(); }
    $("idNext1").onclick = function(){ tv2.Index++; tv2.Start(); }
    $("idPre1").onclick = function(){ tv2.Index--;tv2.Start(); }
    $("idFast1").onclick = function(){ if(--tv2.Step <= 0){tv2.Step = 1;} }
    $("idSlow1").onclick = function(){ if(++tv2.Step >= 10){tv2.Step = 10;} }
    $("idReduce1").onclick = function(){ tv2.Pause-=1000; if(tv2.Pause <= 0){tv2.Pause = 0;} }
    $("idAdd1").onclick = function(){ tv2.Pause+=1000; if(tv2.Pause >= 5000){tv2.Pause = 5000;} }

    $("idReset1").onclick = function(){
        tv2.Step = Math.abs(tv2.options.Step);
        tv2.Time = Math.abs(tv2.options.Time);
        tv2.Auto = !!tv2.options.Auto;
        tv2.Pause = Math.abs(tv2.options.Pause);
    }

}