CAD控件COM接口修改图块插入点到中心点
主要用到函数说明：IMxDrawEntity::GetBoundingBox
返回实体的最小矩形框外包。详细说明如下：
参数 说明
IMxDrawPoint** minPoint 外包框的左下角点
IMxDrawPoint** maxPoint 外包框的右上角
c#中实现代码说明：
//返回控件的数据库对象
MxDrawDatabase databae = (MxDrawDatabase)axMxDrawX1.GetDatabase();
//返回数据库中的块表对象
MxDrawBlockTable blkTab = databae.GetBlockTable();
//创建一个遍历块表中所有记录的遍历器
MxDrawBlockTableIterator mBlockTableiter = blkTab.NewIterator();
//移动当前遍历器位置
for (; !mBlockTableiter.Done(); mBlockTableiter.Step())
{
//返回遍历器当前位置的记录
MxDrawBlockTableRecord blkRec = mBlockTableiter.GetRecord();
//创建一个遍历块表中所有记录的遍历器
MxDrawBlockTableRecordIterator mBlockTableReciter = blkRec.NewIterator();
MxDrawPoint mMaxPt = new MxDrawPoint();
MxDrawPoint mMinPt = new MxDrawPoint();
MxDrawPoint mMaxPtTemp = new MxDrawPoint();
MxDrawPoint mMinPtTemp = new MxDrawPoint();
//移动当前遍历器位置
for (; !mBlockTableReciter.Done(); mBlockTableReciter.Step(true, false))
{
//与用户交互在图面上选择一个实体
MxDrawEntity ent = mBlockTableReciter.GetEntity();
//返回实体的最小矩形框外包
ent.GetBoundingBox(out mMinPtTemp, out mMaxPtTemp);
if ((mMinPtTemp == null) || (mMaxPtTemp == null))
break;
mMaxPt.x = Math.Max(mMaxPt.x, mMaxPtTemp.x);
mMaxPt.y = Math.Max(mMaxPt.y, mMaxPtTemp.y);
mMinPt.x = Math.Min(mMinPt.x, mMinPtTemp.x);
mMinPt.y = Math.Min(mMinPt.y, mMinPtTemp.y);
}
if ((mMinPtTemp == null) || (mMaxPtTemp == null))
continue;
MxDrawPoint mNewBasePt = new MxDrawPoint();
mNewBasePt.x = mMinPt.x + (mMaxPt.x - mMinPt.x) / 2;
mNewBasePt.y = mMinPt.y + (mMaxPt.y - mMinPt.y) / 2;
//块表记录的插入原点属性
blkRec.Origin = mNewBasePt;
//重新生成图，重新生成所有显示数据
axMxDrawX1.Regen();
}
什么语言啊，看不懂
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