JavaScript 无缝上下(左右)滚动加定高(定宽)停顿效果

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<head>

<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>

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 oScroll = this, oScroller = $(idScroller), oScrollMid = $(idScrollMid);

this.SetOptions(options);

this.Scroller = oScroller;

this.Speed = this.options.Speed;

this.timer = null;

this.Pause = 0;

//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));

//方向设置

switch (this.options.Side.toLowerCase()) {

case "right" :

if(this.widthList <= this.widthScroller) return;

this.Scroll = this.ScrollLeftRight;

this.side = -1;

break;

case "left" :

if(this.widthList <= this.widthScroller) return;

this.Scroll = this.ScrollLeftRight;

this.side = 1;

break;

case "down" :

if(this.heightList <= this.heightScroller) return;

this.Scroll = this.ScrollUpDown;

this.side = -1;

break;

case "up" :

default :

if(this.heightList <= this.heightScroller) return;

this.Scroll = this.ScrollUpDown;

this.side = 1;

}

addEventHandler(oScroller, "mouseover", function() { oScroll.Stop(); });

addEventHandler(oScroller, "mouseout", function() { oScroll.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

PauseStep: 1000//停顿时间(PauseHeight或PauseWidth大于0该参数才有效)

};

Object.extend(this.options, options || {});

//上下滚动

ScrollUpDown: function() {

this.Scroller.scrollTop = this.GetScroll(this.Scroller.scrollTop, this.heightScroller, this.heightList, this.options.PauseHeight);

var oScroll = this;

this.timer = window.setTimeout(function(){ oScroll.Scroll(); }, this.Speed);

//左右滚动

ScrollLeftRight: function() {

//document.getElementById("test").innerHTML+=iStep+",";

//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);

var oScroll = this;

this.timer = window.setTimeout(function(){ oScroll.Scroll(); }, this.Speed);

//获取设置滚动数据

GetScroll: function(iScroll, iScroller, iList, iPause) {

var oScroll = this, 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;

} else {

this.Pause += iStep;

}

return (iScroll + iStep);

//开始

Start: function() {

this.Scroll();

//停止

Stop: function() {

clearTimeout(this.timer);

}

};

window.onload = function(){

new Scroller("idScroller", "idScrollMid",{ Side:"up", PauseHeight:25 });

new Scroller("idScroller1", "idScrollMid1",{ Side:"right", PauseWidth:250, Speed:10 });

}

</script>

<style>

.Scroller *{margin:0px; padding:0px;}

.Scroller {line-height:25px;overflow:hidden; border:1px solid #000000;}

#idScrollMid ul{width:500px;}

#idScrollMid li{width:250px;float:left; overflow:hidden; list-style:none;}

#idScrollMid1 {float:left;}

#idScrollMid1 ul{width:250px;float:left;overflow:hidden;}

#idScrollMid1 li{list-style:none;}

</style>

<ul>

</ul>

</div>

<br />

<ul>

</ul>

<ul>

</ul>

<ul>

</ul>

</div>

</body>

</html>

根据上一篇做的改进

效果

posted @ 2008-04-29 15:27 cloudgamer 阅读(12823) 评论(16) 编辑收藏举报

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cloudgamer

脚步无法到达的地方，目光可以到达；目光无法到达的地方，梦想可以到达。 Has anything you've done made your life better?

JavaScript 无缝上下(左右)滚动加定高(定宽)停顿效果

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