JavaScript 无缝八向滚动(兼容ie/ff)
2012年10月21日
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<!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 无缝八向滚动(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 oScroll = this, oScroller = $(idScroller), oScrollMid = $(idScrollMid);
this.SetOptions(options);
this.scroller = oScroller; //对象
this.timer = null; //时间
this.Side = []; //方向
this.side = 0; //参数
//方向设置
switch (this.options.Side.toLowerCase()) {
case "right-down" :
this.Side = ["right", "down"];
break;
case "right-up" :
this.Side = ["right", "up"];
break;
case "left-down" :
this.Side = ["left", "down"];
break;
case "left-up" :
this.Side = ["left", "up"];
break;
case "right" :
this.Side = ["right"];
break;
case "left" :
this.Side = ["left"];
break;
case "down" :
this.Side = ["down"];
break;
case "up" :
default :
this.Side = ["up"];
}
//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() { 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
};
Object.extend(this.options, options || {});
},
//上下滚动
ScrollUpDown: function() {
this.scroller.scrollTop = this.GetScroll(this.scroller.scrollTop, this.heightScroller, this.heightList);
var oThis = this;
this.timer = window.setTimeout(function(){ oThis.Start(); }, this.options.Speed);
},
//左右滚动
ScrollLeftRight: function() {
//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);
var oThis = this;
this.timer = window.setTimeout(function(){ oThis.Start(); }, this.options.Speed);
},
//获取设置滚动数据
GetScroll: function(iScroll, iScroller, iList) {
if