Question

自定义实体支持夹点编辑，下面事件返回实体的夹点

需要响应_DMxDrawXEvents::CustomEntity_getGripPoints事件，C#代码实现如下：

private void axMxDrawX1_CustomEntity_getGripPoints(object sender, AxMxDrawXLib._DMxDrawXEvents_CustomEntity_getGripPointsEvent e)
{
    // 得到自定义实体对象.
    MxDrawCustomEntity pCustomEntity = (MxDrawCustomEntity)e.pCustomEntity;
    
    // 得到自定实体类型
    var sGuid = pCustomEntity.Guid;
    e.pOk = 0;
    if (sGuid == "DrawCustEntity")
    {
        if (!pCustomEntity.IsHave("Count"))
            return;
 
        long lCount = pCustomEntity.GetLong("Count");
 
        // 把需要的夹点数据，放在ret链表中，用于返回 
        MxDrawResbuf ret = (MxDrawResbuf)axMxDrawX1.NewResbuf();
 
        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);
 
 
            ret.AddPoint(pt);
        }
        e.pOk = 1;
        // 返回夹点数据。
        axMxDrawX1.SetEventRetEx(ret);
    }
 
}