[转载]JavaScript编写的一个基于VML的chart 类 - JavaScript论坛

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[转载]JavaScript编写的一个基于VML的chart 类

发在代码框里老出错，现把源代码发上来

<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-

com:office:office">
<head>
<title></title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="ProgId" content="VisualStudio.HTML">
<meta name="Originator" content="Microsoft Visual Studio .NET 7.1">
<STYLE>v\:* { BEHAVIOR: url(#default#VML) }
o\:* { BEHAVIOR: url(#default#VML) }
.shape { BEHAVIOR: url(#default#VML) }
</STYLE>
<script language="javascript">
function Add(){
var shape=document.createElement("v:shape");
shape.type="#tooltipshape";
shape.style.width="150px";
shape.style.height="150px";
shape.coordsize="21600,21600";
shape.fillcolor="infobackground";

var textbox=document.createElement("v:textbox");
textbox.style.border="1px solid red";
textbox.style.innerHTML="测试";
shape.appendChild(textbox);

document.body.appendChild(shape);
}

function VMLPie(pContainer,pWidth,pHeight,pCaption){
this.Container=pContainer;
this.Width= pWidth || "400px";
this.Height=pHeight || "250px";
this.Caption = pCaption || "VML Chart";
this.backgroundColor="";
this.Shadow=false;
this.BorderWidth=0;
this.BorderColor=null;
this.all=new Array();
this.RandColor=function(){

return "rgb("+ parseInt( Math.random() * 255) +"," +parseInt(

Math.random() * 255) +"," +parseInt( Math.random() * 255)+")";
}
this.VMLObject=null;
}

VMLPie.prototype.Draw=function(){
//画外框
var o=document.createElement("v:group");
o.style.width=this.Width;
o.style.height=this.Height;
o.coordsize="21600,21600";
//添加一个背景层
var vRect=document.createElement("v:rect");
vRect.style.width="21600px"
vRect.style.height="21600px"
o.appendChild(vRect);

var vCaption=document.createElement("v:textbox");
vCaption.style.fontSize="24px";
vCaption.style.height="24px"
vCaption.style.fontWeight="bold";
vCaption.innerHTML=this.Caption;
vCaption.style.textAlign="center";

vRect.appendChild(vCaption);
//设置边框大小
if(this.BorderWidth){
vRect.strokeweight=this.BorderWidth;
}
//设置边框颜色
if(this.BorderColor){
vRect.strokecolor=this.BorderColor;
}
//设置背景颜色
if(this.backgroundColor){
vRect.fillcolor=this.backgroundColor;
}
//设置是否出现阴影
if(this.Shadow){
var vShadow=document.createElement("v:shadow");
vShadow.on="t";
vShadow.type="single";
vShadow.color="graytext";
vShadow.offset="4px,4px";
vRect.appendChild(vShadow);
}
this.Container.appendChild(o);

//开始画内部园
var oOval=document.createElement("v:oval");
oOval.style.width="15000px";
oOval.style.height="14000px";
oOval.style.top="4000px";
oOval.style.left="1000px";
oOval.fillcolor="#d5dbfb";

//本来计划加入3D的效果，后来感觉确实不好控制，就懒得动手了
//var o3D=document.createElement("o:extrusion");
var formatStyle=' <v:fill rotate="t" angle="-135" focus="100%"

type="gradient"/>';
//formatStyle+='<o:extrusion v:ext="view" color="#9cf" on="t"

rotationangle="-15"';
//formatStyle+=' viewpoint="0,34.72222mm" viewpointorigin="0,.5"

skewangle="105"';
//formatStyle+=' lightposition="0,50000" lightposition2="0,-50000"/>';
formatStyle+='<o:extrusion v:ext="view" backdepth="1in" on="t"

viewpoint="0,34.72222mm" viewpointorigin="0,.5" skewangle="90"

lightposition="-50000" lightposition2="50000" type="perspective"/>';
oOval.innerHTML=formatStyle;

o.appendChild(oOval);
this.CreatePie(o);

}
VMLPie.prototype.CreatePie=function(vGroup){
var mX=Math.pow(2,16) * 360;
//这个参数是划图形的关键
//AE x y width height startangle endangle
//x y表示圆心位置
//width height形状的大小
//startangle endangle的计算方法如下
// 2^16 * 度数

var vTotal=0;
var startAngle=0;
var endAngle=0;
var pieAngle=0;
var prePieAngle=0;

var objRow=null;
var objCell=null;

for(i=0;i<this.all.length;i++){
vTotal+=this.all[i].Value;
}

var objLegendRect=document.createElement("v:rect");

var objLegendTable=document.createElement("table");
objLegendTable.cellPadding=0;
objLegendTable.cellSpacing=5;
objLegendTable.width="100%";
with(objLegendRect){
style.left="17000px";
style.top="4000px";
style.width="4000px";
style.height="12000px";
fillcolor="#e6e6e6";
strokeweight="1px";
}
objRow=objLegendTable.insertRow();
objCell=objRow.insertCell();
objCell.colSpan="2";
//objCell.style.border="1px outset";
objCell.style.backgroundColor="black";
objCell.style.padding="5px";
objCell.style.color="window";
objCell.style.font="caption";
objCell.innerText="总数:"+vTotal;

var vTextbox=document.createElement("v:textbox");
vTextbox.appendChild(objLegendTable);
objLegendRect.appendChild(vTextbox);

var vShadow=document.createElement("v:shadow");
vShadow.on="t";
vShadow.type="single";
vShadow.color="graytext";
vShadow.offset="2px,2px";
objLegendRect.appendChild(vShadow);

vGroup.appendChild(objLegendRect);

var strAngle="";
for(i=0;i<this.all.length;i++){ //顺序的划出各个饼图
var vPieEl=document.createElement("v:shape");
var vPieId=document.uniqueID;
vPieEl.style.width="15000px";
vPieEl.style.height="14000px";
vPieEl.style.top="4000px";
vPieEl.style.left="1000px";
vPieEl.coordsize="1500,1400";
vPieEl.strokecolor="white";
vPieEl.id=vPieId;

pieAngle= this.all[i].Value / vTotal;
startAngle+=prePieAngle;
prePieAngle=pieAngle;
endAngle=pieAngle;

//strAngle+=this.all[i].Name +":" +this.all[i].Value+ "

Start:"+startAngle +" End:"+ endAngle +"\n";

vPieEl.path="M 750 700 AE 750 700 750 700 " + parseInt(mX *

startAngle) +" " + parseInt(mX * endAngle) +" xe";
vPieEl.title=this.all[i].Name +"\n所占比例:"+ endAngle * 100 +"%\n详

细描述:" +this.all[i].TooltipText;

//vPieEl.innerHTML='<v:fill rotate="t" angle="-135" focus="100%"

type="gradient"/>';
var objFill=document.createElement("v:fill");
objFill.rotate="t";
objFill.focus="100%";
objFill.type="gradient";
objFill.angle=parseInt( 360 * (startAngle + endAngle /2));
vPieEl.appendChild(objFill);

var objTextbox=document.createElement("v:textbox");
objTextbox.border="1px solid black";
objTextbox.innerHTML=this.all[i].Name +":" + this.all[i].Value;
//vPieEl.appendChild(objTextbox);

var vColor=this.RandColor();
vPieEl.fillcolor=vColor; //设置颜色
//开始画图例
objRow=objLegendTable.insertRow();

objCell=objRow.insertCell();//颜色标记
objCell.style.backgroundColor=vColor;
objCell.style.width="16px";

objCell=objRow.insertCell();
objCell.style.font="icon";
objCell.style.padding="3px";
objCell.innerText=this.all[i].Name +":"+this.all[i].Value ;

vGroup.appendChild(vPieEl);
}

}
VMLPie.prototype.Refresh=function(){

}

VMLPie.prototype.AddData=function(sName,sValue,sTooltipText){

var oData=new Object();
oData.Name=sName;
oData.Value=sValue;
oData.TooltipText=sTooltipText;
var iCount=this.all.length;
this.all[iCount]=oData;

}
VMLPie.prototype.Clear=function(){
this.all.length=0;
}

//以下是函数调用
function DrawPie(){
var objPie=new VMLPie(document.body,"600px","450px","人口统计图");
//objPie.BorderWidth=3;
//objPie.BorderColor="blue";
//objPie.Width="800px";
//objPie.Height="600px";
objPie.backgroundColor="#ffffff";
objPie.Shadow=true;

objPie.AddData("北京",10,"北京的人口");
objPie.AddData("上海",52,"上海的固定人口");
objPie.AddData("天津",30,"天津的外地人口");
objPie.AddData("西安",58,"西安城市人口");
objPie.AddData("武汉",30,"武汉的外地人口");
objPie.AddData("重庆",58,"重庆城市人口");
objPie.Draw();
}