本文实例讲述了jQuery制作简单柱状图的方法。分享给大家供大家参考。具体实现方法如下:
Html部分:
<head>
<title>柱状图</title>
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />
<link href=\"css.css\" type=\"text/css\" rel=\"stylesheet\" />
<script src=\"jquery-1.8.2.min.js\" type=\"text/javascript\"></script>
<script src=\"histogram.js\" type=\"text/javascript\"></script>
</head>
<body>
<div class=\"histogram-container\" id=\"histogram-container\"></div>
</body>
CSS部分:
/*以下为柱状图样式*/
.histogram-container{position:relative;margin-left:60px;margin-top:10px;margin-bottom:25px;}
.histogram-bg-line{border:#999 solid;border-width:0 0px 1px 1px;border-right-color:#eee;overflow:hidden;width:99%;}
.histogram-bg-line ul{overflow:hidden;border:#eee solid;border-width:1px 0 0 0;clear:both;}
.histogram-bg-line li{float:left;overflow:hidden;background:#fff;}
.histogram-bg-line li div{border-right:1px #eee solid;}
.histogram-content{position:absolute;left:0px;top:0;width:99%;height:100%;}
.histogram-content ul{height:100%;}
.histogram-content li{float:left;height:100%;text-align:center;position:relative;}
.histogram-box{position:relative;display:inline-block;height:100%;width:20px;}
.histogram-content li a{position:absolute;bottom:0;right:0;display:block;width:20px;font-size:0;line-height:0;}
.histogram-content li .histogram-name{position:absolute;bottom:-20px;left:0px;white-space:nowrap;display:inline-block;width:100%;font-size:12px;overflow:hidden;}
.histogram-y{position:absolute;left:-60px;top:-10px;font:12px/1.8 verdana,arial;}
.histogram-y li{text-align:right;width:55px;padding-right:5px;color:#333;}
.histogram-bg-line li div,.histogram-y li{height:30px;/*控制单元格的高度及百分比的高度,使百分数与线条对其*/}
Js部分:
$(function(){
var dataArr={
\"data\":[
{\"id\":1,\"name\":\"百度\",\"per\":\"10\"},
{\"id\":2,\"name\":\"腾讯\",\"per\":\"20\"},
{\"id\":3,\"name\":\"新浪\",\"per\":\"10\"},
{\"id\":4,\"name\":\"网易\",\"per\":\"44\"},
{\"id\":5,\"name\":\"搜狐\",\"per\":\"50\"},
{\"id\":5,\"name\":\"小虾虎鱼\",\"per\":\"69\"},
{\"id\":5,\"name\":\"人人网\",\"per\":\"72\"},
{\"id\":5,\"name\":\"爱奇艺\",\"per\":\"88\"},
{\"id\":5,\"name\":\"奇虎360\",\"per\":\"92\"},
{\"id\":5,\"name\":\"阿里巴巴\",\"per\":\"15\"},
{\"id\":5,\"name\":\"阿里巴巴\",\"per\":\"10\"}
]
};
new histogram().init(dataArr.data);
});
function histogram(){
var controls={};
var bgColor=new Array(\"#666666\",\"#21AA7C\",\"#2277BB\",\"#dc7644\",\"#BBAA22\",\"#AA22AA\",\"#338800\",\"#1099EE\",\"#ffcc33\",\"#ED3810\");
this.init=function(data,y){
setControls();
buildHtml(data,y);
}
function setControls(){
controls.histogramContainer=$(\"#histogram-container\");
controls.histogramBgLineUL=controls.histogramContainer.children(\"div.histogram-bg-line\");
controls.histogramContentUL=controls.histogramContainer.children(\"div.histogram-content\");
controls.histogramY=controls.histogramContainer.children(\"div.histogram-y\");
}
function buildHtml(data,y){
var len=data.length,perArr=new Array(),maxNum,maxTotal,yStr=\'\';
var contentStr=\'\',bgLineStr=\'\',bgLineAll=\'\';
var widthPer=Math.floor(100/len);
minWidth=len*21+60;
controls.histogramContainer.css(\"min-width\",minWidth+\"px\");
for(var a=0;a<len;a++){
perArr[a]=parseInt(data[a][\'per\']);
}
maxNum=String(perArr.max());
if(maxNum.length>2){
var x=parseInt(maxNum.substr(maxNum.length-2,1))+1;
maxTotal=Math.floor(parseInt(maxNum/100))*100+x*10;
}else{
maxTotal=Math.floor(parseInt(maxNum/10))*10+10;
}
//y轴部分
if(y==\"%\"){
yStr+=\'<li>100%</li><li>80%</li><li>60%</li><li>40%</li><li>20%</li><li>0%</li>\';
}else{
var avg=maxTotal/5;
for(i=5;i>=0;i--){
yStr+=\'<li>\'+avg*i+\'</li>\';
}
}
//柱状条部分
for(var i=0;i<len;i++){
var per=Math.floor(parseInt(data[i][\'per\'])/maxTotal*100);
var n=Math.floor(parseInt(per)/10);
contentStr+=\'<li style=\"width:\'+widthPer+\'%\">\';
contentStr+=\'<span class=\"histogram-box\"><a style=\"height:\'+per+\'%\'+\';background:\'+bgColor[n]+\';\" title=\"\'+data[i][\'per\']+\'\"></a></span><span class=\"histogram-name\">\'+data[i][\'name\']+\'</span>\';
contentStr+=\'</li>\';
bgLineStr+=\'<li style=\"width:\'+widthPer+\'%;\"><div></div></li>\';
}
//背景方格部分
for(var j=0;j<5;j++){
bgLineAll+=\'<ul>\'+bgLineStr+\'</ul>\';
}
bgLineAll=\'<div class=\"histogram-bg-line\">\'+bgLineAll+\'</div>\';
contentStr=\'<div class=\"histogram-content\"><ul>\'+contentStr+\'</ul></div>\';
yStr=\'<div class=\"histogram-y\"><ul>\'+yStr+\'</ul></div>\';
controls.histogramContainer.html(bgLineAll+contentStr+yStr);
controls.histogramContainer.css(\"height\",controls.histogramContainer.height()+\"px\");//主要是解决IE6中的问题
}
}
Array.prototype.max = function(){//最大值
return Math.max.apply({},this)
}
希望本文所述对大家的jQuery程序设计有所帮助。