javascript水平方向手风琴焦点图
javascript水平方向手风琴焦点图，效果如下
源代码如下
<!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>
<title>javascript水平方向手风琴焦点图</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
var $$ = function (id) {
return "string" == typeof id ? document.getElementById(id) : id;
};
function Event(e){
var oEvent = document.all ? window.event : e;
if (document.all) {
if(oEvent.type == "mouseout") {
oEvent.relatedTarget = oEvent.toElement;
}else if(oEvent.type == "mouseover") {
oEvent.relatedTarget = oEvent.fromElement;
}
}
return oEvent;
}
function addEventHandler(oTarget, sEventType, fnHandler) {
if (oTarget.addEventListener) {
oTarget.addEventListener(sEventType, fnHandler, false);
} else if (oTarget.attachEvent) {
oTarget.attachEvent("on" + sEventType, fnHandler);
} else {
oTarget["on" + sEventType] = fnHandler;
}
};
var Class = {
create: function() {
return function() {
this.initialize.apply(this, arguments);
}
}
}
Object.extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
var GlideView = Class.create();
GlideView.prototype = {
//容器对象 容器宽度 展示标签 展示宽度
initialize: function (obj, iWidth, sTag, iMaxWidth, options) {
var oContainer = $$(obj), oThis = this, len = 0;
this.SetOptions(options);
this.Step = Math.abs(this.options.Step);
this.Time = Math.abs(this.options.Time);
this.Showtext = false; //是否显示说明文本
this._list = oContainer.getElementsByTagName(sTag);
len = this._list.length;
this._count = len;
this._width = parseInt(iWidth / len);
this._width_max = parseInt(iMaxWidth);
this._width_min = parseInt((iWidth - this._width_max) / (len - 1));
this._timer = null;
//有说明文本
if (this.options.TextTag && this.options.TextHeight > 0) {
this.Showtext = true;
this._text = oContainer.getElementsByTagName(this.options.TextTag);
this._height_text = -parseInt(this.options.TextHeight);
}
this.Each(function (oList, oText, i) {
oList._target = this._width * i; //自定义一个属性放目标left
oList.style.left = oList._target + "px";
oList.style.position = "absolute";
addEventHandler(oList, "mouseover", function () { oThis.Set.call(oThis, i); });
//有说明文本
if (oText) {
oText._target = this._height_text; //自定义一个属性放目标bottom
oText.style.bottom = oText._target + "px";
oText.style.position = "absolute";
}
})
//容器样式设置
oContainer.style.width = iWidth + "px";
oContainer.style.overflow = "hidden";
oContainer.style.position = "relative";
//移出容器时返回默认状态
if (this.options.huifuclose == false) {
addEventHandler(oContainer, "mouseout", function (e) {
//变通防止执行oList的mouseout
var o = Event(e).relatedTarget;
if (oContainer.contains ? !oContainer.contains(o) : oContainer != o && !(oContainer.compareDocumentPosition(o) & 16)) oThis.Set.call(oThis, -1);
});
}
},
//设置默认属性
SetOptions: function (options) {
this.options = {//默认值
Step: 20, //滑动变化率
Time: 20, //滑动延时
TextTag: "", //说明容器tag
huifuclose: true, //是否恢复状态
TextHeight: 0//说明容器高度
};
Object.extend(this.options, options || {});
},
//相关设置
Set: function (index) {
if (index < 0) {
//鼠标移出容器返回默认状态
this.Each(function (oList, oText, i) {
oList._target = this._width * i;
if (oText) { oText._target = this._height_text; }
})
} else {
//鼠标移到某个滑动对象上
this.Each(function (oList, oText, i) {
oList.className = i == index ? 'focus' : ''; ////////
oList._target = (i <= index) ? this._width_min * i : this._width_min * (i - 1) + this._width_max;
if (oText) { oText._target = (i == index) ? 0 : this._height_text; }
})
}
this.Move();
},
//移动
Move: function () {
clearTimeout(this._timer);
var bFinish = true; //是否全部到达目标地址
this.Each(function (oList, oText, i) {
var iNow = parseInt(oList.style.left), iStep = this.GetStep(oList._target, iNow);
if (iStep != 0) {
bFinish = false; oList.style.left = (iNow + iStep) + "px";
}
//有说明文本
if (oText) {
iNow = parseInt(oText.style.bottom), iStep = this.GetStep(oText._target, iNow);
if (iStep != 0) { bFinish = false; oText.style.bottom = (iNow + iStep) + "px"; }
}
})
//未到达目标继续移动
if (!bFinish) { var oThis = this; this._timer = setTimeout(function () { oThis.Move(); }, this.Time); }
},
//获取步长
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;
},
Each: function (fun) {
for (var i = 0; i < this._count; i++)
fun.call(this, this._list[i], (this.Showtext ? this._text[i] : null), i);
}
};
</script>
<style type="text/css">
#idGlideView { height:230px; margin:10px auto;overflow:hidden;}
#idGlideView div {width:500px;height:230px; background-color:#FFF}
#idGlideView div img{filter:alpha(opacity=50); -moz-opacity:0.5; -khtml-opacity: 0.5; opacity: 0.5;}
#idGlideView div.focus img{filter:alpha(opacity=100); -moz-opacity:1; -khtml-opacity: 1; opacity: 1;}
#idGlideView div p {
width:500px;
height:50px;
filter: alpha(opacity=50);
opacity: 0.5;
background:#000;
color:#fff;
text-decoration:none; padding:5px 10px; font-size:14px; font-family:"微软雅黑";margin:0px
}
</style>
</head>
<body>
<div id="idGlideView">
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</div>
<script type="text/javascript">
window.onload = function () {
var gv = new GlideView("idGlideView", 725, "div", 350, { TextTag: "p", TextHeight: 50 });
gv.Set(2);
gv.Showtext = true;
}
</script>
</body>
</html>
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