中文XML论坛--[求助]

贴子主题： [求助]

本主题类别:

论坛上以前有个朋友发过一个例子，非常好，现摘录如下：（你要我现写一个实在是懒得写了）
//画饼图,第一个参数是数值数组，第二个参数是年份数组
function drawPie(tmparr1,tmparr2) {
    var basePointX     = 126.;
    var basePointY     = 129.;
    var currentX       = 0.0;
    var currentY       = 0.0;
    var offsetX1       = 0.0;
    var offsetY1       = 0.0;
    var offsetX2       = 0.0;
    var offsetY2       = 0.0;
    var radius         = 125.;
    var angleSum1      = 0.;
    var angleSum2      = 0.;
    var vertexCount    = tmparr1.length;
    var xPts           = Array(vertexCount);
    var yPts           = Array(vertexCount);
    var angles         = Array(vertexCount);
    var pointPath      = "";
    var colorCount     = arrColors.length;

    var pieNode        = null;
    var gcNode         = null;

    var dataSum = 0.;

    for(var v=0; v<vertexCount; v++)
    {
       dataSum += Math.abs(parseFloat(tmparr1[v]));
    }
    for(var v=0; v<vertexCount; v++)
    {
       angles[v] = 360.*Math.abs(parseFloat(tmparr1[v]))/dataSum;
    }
    gcNode = svgDoc.getElementById("gc");
    var txtstyle = "text-anchor:left;";
    for(var v=0; v<vertexCount; v++)
    {
       angleSum2 = angleSum1 + angles[v];
       var txtpv = parseInt(Math.abs(tmparr1[v])/dataSum *10000) / 100 + "%";

       offsetX1 = radius*Math.cos(angleSum1*Math.PI/180);
       offsetY1 = radius*Math.sin(angleSum1*Math.PI/180);
       offsetX2 = radius*Math.cos(angleSum2*Math.PI/180);
       offsetY2 = radius*Math.sin(angleSum2*Math.PI/180);

currentX = basePointX+offsetX2;
currentY = basePointY-offsetY2;

      // the vertical offset must be subtracted,
      // so we need to "flip" the sign of offsetY1
       offsetY1 *= -1;

       pointPath = "M"+basePointX+","+basePointY;
       pointPath += " l"+offsetX1+","+offsetY1;
       if(angles[v] < 180 ) {
         pointPath += " A"+radius+","+radius+" 0 0 0 ";
       } else {
         pointPath += " A"+radius+","+radius+" 0 1 0 ";
       }
       pointPath += currentX+","+currentY;
       pointPath += " L"+basePointX+","+
                        basePointY+"z";

fillColor = "fill:" + arrColors[v%colorCount];

       txtGnode = tmparr2[v] + "," + tmparr1[v] + "," + txtpv;
       var newg = svgDoc.createElement("g");
       newg.setAttribute("onmouseover","ShowTooltip(evt,'" + txtGnode + "')" );
       newg.setAttribute("onmouseout","HideTooltip(evt)");
       gcNode.appendChild(newg);

       pieNode = svgDoc.createElement("path");
       pieNode.setAttribute("d",    pointPath);
       pieNode.setAttribute("style",fillColor);
       newg.appendChild(pieNode);

       var recNode = svgDoc.createElement("rect");
       recNode.setAttribute("x",253);
       recNode.setAttribute("y",(10 + v*20));
       recNode.setAttribute("width",8);
       recNode.setAttribute("height",8);
       recNode.setAttribute("style",fillColor);
       newg.appendChild(recNode);

       var txtNode = svgDoc.createElement("text");
       txtNode.setAttribute("x",264);
       txtNode.setAttribute("y",(15 + v*20));
       txtst = txtstyle + fillColor;
       txtNode.setAttribute("style",txtst);
       newg.appendChild(txtNode);
       texte=svgDoc.createTextNode(tmparr2[v] + "[" + txtpv + "]");
       txtNode.appendChild(texte);

angleSum1 += angles[v];
}
}


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