Go语言视频零基础入门到精通

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根据
无缝滚动和
八向滚动修改而来，特点是能同一程序中分别向四个方向移动。

对滚动框内的样式设置有些要求。



效果：


var $$ = function (id) {    return "string" == typeof id ? document.getElementById(id) : id;};var Class = {  create: function() {    return function() {      this.initialize.apply(this, arguments);    }  }}Object.extend = function(destination, source) { for (var property in source) {  destination[property] = source[property]; } return destination;}function addEventHandler(oTarget, sEventType, fnHandler) { if (oTarget.addEventListener) {  oTarget.addEventListener(sEventType, fnHandler, false); } else if (oTarget.attachEvent) {  oTarget.attachEvent("on" + sEventType, fnHandler); } else {  oTarget["on" + sEventType] = fnHandler; }};var Scroller = Class.create();Scroller.prototype = {  initialize: function(idScroller, idScrollMid, options) {    var oThis = this, oScroller = $$(idScroller), oScrollMid = $$(idScrollMid);  this.SetOptions(options); this.Side = this.options.Side || ["up"];//方向 this.scroller = oScroller;   //对象 this.speed = this.options.Speed; //速度 this.timer = null;     //时间 this.pauseHeight = 0;    //定高 this.pauseWidth = 0;    //定宽 this.pause = 0;      //定高(宽) this.side = 0;      //参数  //用于上下滚动 this.heightScroller = parseInt(oScroller.style.height) || oScroller.offsetHeight; this.heightList = oScrollMid.offsetHeight;  //用于左右滚动 this.widthScroller = parseInt(oScroller.style.width) || oScroller.offsetWidth; this.widthList = oScrollMid.offsetWidth;  //js取不到css设置的height和width  oScroller.style.overflow = "hidden"; oScrollMid.appendChild(oScrollMid.cloneNode(true)); oScrollMid.appendChild(oScrollMid.cloneNode(true));  addEventHandler(oScroller, "mouseover", function() { oThis.Stop(); }); addEventHandler(oScroller, "mouseout", function() { oThis.Start(); });  this.Start();  },  //设置默认属性  SetOptions: function(options) {    this.options = {//默认值   Step:   1,//每次变化的px量   Speed:  20,//速度(越大越慢)   Side:   ["up"],//滚动方向:"up"是上，"down"是下，"left"是左，"right"是右   PauseHeight: 0,//隔多高停一次   PauseWidth: 0,//隔多宽停一次   //当上下和左右一起使用时必须设置PauseHeight和PauseWidth来设置转向位置   PauseStep: 1000//停顿时间(PauseHeight或PauseWidth大于0该参数才有效)    };    Object.extend(this.options, options || {});  },   //转向  Turn: function() { //通过设置方向数组的排列来转向 this.Side.push(this.Side.shift().toLowerCase());  },  //上下滚动  ScrollUpDown: function() { this.pause = this.pauseHeight; this.scroller.scrollTop = this.GetScroll(this.scroller.scrollTop, this.heightScroller, this.heightList, this.options.PauseHeight); this.pauseHeight = this.pause;  var oThis = this; this.timer = window.setTimeout(function(){ oThis.Start(); }, this.speed);  },  //左右滚动  ScrollLeftRight: function() { this.pause = this.pauseWidth; //注意:scrollLeft超过1400会自动变回1400 注意长度 this.scroller.scrollLeft = this.GetScroll(this.scroller.scrollLeft, this.widthScroller, this.widthList, this.options.PauseWidth); this.pauseWidth = this.pause;  var oThis = this; this.timer = window.setTimeout(function(){ oThis.Start(); }, this.speed);  },  //获取设置滚动数据  GetScroll: function(iScroll, iScroller, iList, iPause) { var iStep = this.options.Step * this.side;  if(this.side > 0){  if(iScroll >= (iList * 2 - iScroller)){ iScroll -= iList; } } else {  if(iScroll  0){  if(Math.abs(this.pause) >= iPause){   this.speed = this.options.PauseStep; this.pause = iStep = 0; this.Turn();  } else {   this.pause += iStep;  } }  return (iScroll + iStep);  },  //开始  Start: function() {  //document.getElementById("test").innerHTML+=sTurn+",";  //方向设置 switch (this.Side[0].toLowerCase()) {  case "right" :   if(this.widthList
.Scroller {line-height:50px; border:1px solid #000000; padding:0px 10px; height:50px; width:400px;}.Scroller *{margin:0px; padding:0px;}.ScrollMid {float:left;}.ScrollMid ul{width:800px;float:left;}.ScrollMid li{list-style:none; float:left; width:390px; padding-left:10px;line-height:50px; }


  
   
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new Scroller("idScroller", "idScrollMid",{ Side:["up","left"], PauseHeight:50, PauseWidth:400 });

代码：




<!
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
>


<
html
xmlns
="http://www.w3.org/1999/xhtml"
>


<
head
>


<
meta
http-equiv
="Content-Type"
  content
="text/html; charset=gb2312"
  
/>


<
title
>
javaScript 无缝上下左右滚动加定高定宽停顿效果(兼容ie/ff)
</
title
>


</
head
>


<
body
>


<
script
type
="text/javascript"
>


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;
}

function addEventHandler(oTarget, sEventType, fnHandler) {
    if (oTarget.addEventListener) {
        oTarget.addEventListener(sEventType, fnHandler, false);
    } else if (oTarget.attachEvent) {
        oTarget.attachEvent("on" + sEventType, fnHandler);
    } else {
        oTarget["on" + sEventType] = fnHandler;
    }
};


var Scroller = Class.create();
Scroller.prototype = {
  initialize: function(idScroller, idScrollMid, options) {
    var oThis = this, oScroller = $(idScroller), oScrollMid = $(idScrollMid);
   
    this.SetOptions(options);
    this.Side = this.options.Side || ["up"];//方向
    this.scroller = oScroller;            //对象
    this.speed = this.options.Speed;    //速度
    this.timer = null;                    //时间
    this.pauseHeight = 0;                //定高
    this.pauseWidth = 0;                //定宽
    this.pause = 0;                        //定高(宽)
    this.side = 0;                        //参数
   
    //用于上下滚动
    this.heightScroller = parseInt(oScroller.style.height) || oScroller.offsetHeight;
    this.heightList = oScrollMid.offsetHeight;
   
    //用于左右滚动
    this.widthScroller = parseInt(oScroller.style.width) || oScroller.offsetWidth;
    this.widthList = oScrollMid.offsetWidth;
   
    //js取不到css设置的height和width
   
    oScroller.style.overflow = "hidden";
    oScrollMid.appendChild(oScrollMid.cloneNode(true));
    oScrollMid.appendChild(oScrollMid.cloneNode(true));
   
    addEventHandler(oScroller, "mouseover", function() { oThis.Stop(); });
    addEventHandler(oScroller, "mouseout", function() { oThis.Start(); });
   
    this.Start();
  },
  //设置默认属性
  SetOptions: function(options) {
    this.options = {//默认值
      Step:            1,//每次变化的px量
      Speed:        20,//速度(越大越慢)
      Side:            ["up"],//滚动方向:"up"是上，"down"是下，"left"是左，"right"是右
      PauseHeight:    0,//隔多高停一次
      PauseWidth:    0,//隔多宽停一次
      //当上下和左右一起使用时必须设置PauseHeight和PauseWidth来设置转向位置
      PauseStep:    1000//停顿时间(PauseHeight或PauseWidth大于0该参数才有效)
    };
    Object.extend(this.options, options || {});
  },
  //转向
  Turn: function() {
    //通过设置方向数组的排列来转向
    this.Side.push(this.Side.shift().toLowerCase());
  },
  //上下滚动
  ScrollUpDown: function() {
    this.pause = this.pauseHeight;
    this.scroller.scrollTop = this.GetScroll(this.scroller.scrollTop, this.heightScroller, this.heightList, this.options.PauseHeight);
    this.pauseHeight = this.pause;
   
    var oThis = this;
    this.timer = window.setTimeout(function(){ oThis.Start(); }, this.speed);
  },
  //左右滚动
  ScrollLeftRight: function() {
    this.pause = this.pauseWidth;
    //注意:scrollLeft超过1400会自动变回1400 注意长度
    this.scroller.scrollLeft = this.GetScroll(this.scroller.scrollLeft, this.widthScroller, this.widthList, this.options.PauseWidth);
    this.pauseWidth = this.pause;
   
    var oThis = this;
    this.timer = window.setTimeout(function(){ oThis.Start(); }, this.speed);
  },
  //获取设置滚动数据
  GetScroll: function(iScroll, iScroller, iList, iPause) {
    var iStep = this.options.Step * this.side;
   
    if(this.side > 0){
        if(iScroll >= (iList * 2 - iScroller)){ iScroll -= iList; }
    } else {
        if(iScroll <= 0){ iScroll += iList; }
    }
   
    this.speed = this.options.Speed;
    if(iPause > 0){
        if(Math.abs(this.pause) >= iPause){
            this.speed = this.options.PauseStep; this.pause = iStep = 0; this.Turn();
        } else {
            this.pause += iStep;
        }
    }
   
    return (iScroll + iStep);
  },
  //开始
  Start: function() {   
    //方向设置
    switch (this.Side[0].toLowerCase()) {
        case "right" :
            if(this.widthList < this.widthScroller) return;
            this.side = -1;
            this.ScrollLeftRight();
            break;
        case "left" :
            if(this.widthList < this.widthScroller) return;
            this.side = 1;
            this.ScrollLeftRight();
            break;
        case "down" :
            if(this.heightList < this.heightScroller) return;
            this.side = -1;
            this.ScrollUpDown();
            break;
        case "up" :
        default :
            if(this.heightList < this.heightScroller) return;
            this.side = 1;
            this.ScrollUpDown();
    }
  },
  //停止
  Stop: function() {
    clearTimeout(this.timer);
  }
};

window.onload = function(){
    new Scroller("idScroller", "idScrollMid",{ Side:["up","left"], PauseHeight:50, PauseWidth:400 });
}

</
script
>


<
style
>


.Scroller {}{line-height:50px; border:1px solid #000000; padding:0px 10px; height:50px; width:400px;}
.Scroller *{}{margin:0px; padding:0px;}
.ScrollMid {}{float:left;}
.ScrollMid ul{}{width:800px;float:left;}
.ScrollMid li{}{list-style:none; float:left; width:390px; padding-left:10px;}

</
style
>


<
div
id
="idScroller"
  class
="Scroller"
  style
="width:400px; height:50px;"
>

  
<
div
style
="width:1600px"
>

   
<
div
id
="idScrollMid"
  class
="ScrollMid"
>

      
<
ul
>

        
<
li
>
111111111111
</
li
>

        
<
li
>
2222222222222
</
li
>

        
<
li
>
333333333333333
</
li
>

        
<
li
>
4444444444444
</
li
>

      
</
ul
>

   
</
div
>

  
</
div
>


</
div
>


<
div
id
="test"
></
div
>


</
body
>


</
html
>