js中实现代码说明：

function DoFixCircleComment()

{

    var ent = mxOcx.DrawCustomEntity("TestMxCustomEntity", "");

    var basept = mxOcx.NewPoint();

    basept.x = 100;

    basept.y = 100;

    ent.SetPoint("BasePoint", basept);

    ent.SetString("Text", "固定参数绘制圆形标注");

    ent.SetDouble("TextHeight", 100);

    //标注位置提示多边形的边数. 小于2不绘制，=2绘制圆，大于2绘制多边形

    ent.SetLong("EdgeNumber", 2);

    ent.SetDouble("ShapRadius", 1);

    var dimpt = mxOcx.NewPoint();

    dimpt.x = 200;

    dimpt.y = 200;

    ent.SetPoint("DimPoint", dimpt);

    var frstPt = mxOcx.NewPoint();

    frstPt.x = 0;

    frstPt.y = 0;

    ent.SetPoint("First", frstPt);

    ent.TextStyle = "MyCommentFont";

    ent.SetLong("isCircle", 1);

}

效果展示：

通过点击绘制圆形标注按钮，触发DoFixCircleComment()事件，CAD控件视区将显示在js中设置好的圆形标注。如下图所示：

CAD绘制固定圆形标注（网页版）_控件