Question

想要支持自定义实体的移动，旋转，缩放功能，需要添加坐标变换事件处理，事件名：CustomEntity_transformBy

函数实现c#代码如下：

 private void axMxDrawX1_CustomEntity_transformBy(object sender, _DMxDrawXEvents_CustomEntity_transformByEvent e)
        {
            e.pOk = 1;
            MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pCustomEntity;
            // 得到自定义实体类型
            var sGuid = pCustomEntity.Guid;

            if (sGuid == "DrawCustEntity")
            {
                if (!pCustomEntity.IsHave("Count"))
                    return;
                long lCount = pCustomEntity.GetLong("Count");

                // 对实体的点坐标进行坐标变换。
                for (long i = 0; i < lCount; i++)
                {
                    String sName;
                    sName = "Point" + (i + 1).ToString();
                    if (!pCustomEntity.IsHave(sName))
                        break;
                    // 取自定义实体的端点坐标。
                    MxDrawPoint pt = pCustomEntity.GetPoint(sName);
                    // 计算出新的坐标。
                    pt.TransformBy((MxDrawMatrix3d)e.pMatXform);
                    pCustomEntity.SetPoint(sName, pt);

                }
            }
        }