创建分组

//创建分组
//groupId,分组ID
//ids,实体ID数组
Acad::ErrorStatus makeGroup(AcDbObjectId groupId,AcDbObjectIdArray& ids)
{
 Acad::ErrorStatus es=Acad::eOk;
 AcDbGroup *pGroup;
 es=acdbOpenObject(pGroup, groupId, AcDb::kForWrite);
 if(es!=Acad::eOk)
 {
  return es;
 }
 long i, length;
 length=ids.logicalLength();
 ads_name ename;
 pGroup->append(ids);
 pGroup->close();
 return Acad::eOk;
}
//不存在的分组名称
//pDb:数据库
//strName:分组名称
Acad::ErrorStatus notExistGroupName(AcDbDatabase* pDb,
         CString& strName)
{
 Acad::ErrorStatus es=Acad::eOk;
 AcDbDictionary *pGroupDict;
 es=pDb->getGroupDictionary(pGroupDict, AcDb::kForRead);
 if(es!=Acad::eOk)
 {
  return es;
 }
 int nCount=0;
 CString strTmp=strName;
 while(pGroupDict->has(strName))
 {
  nCount++;
  strName.Format(_T(“%s%d”),strTmp,nCount);
 }
 pGroupDict->close();
 return Acad::eOk;

}
//创建分组
//pDb:数据库
//strName:分组名称
//bRenameIfExist:如果已经存在是否需要重新命名
//ids,实体ID数组
Acad::ErrorStatus makeGroup(AcDbDatabase* pDb,
       CString& strName,
       bool bRenameIfExist,
       AcDbObjectIdArray& ids)
{
 Acad::ErrorStatus es=Acad::eOk;
 if(bRenameIfExist)
 {
  es=notExistGroupName(pDb,strName);
  if(es!=Acad::eOk)
  {
   return es;
  }
 }
 AcDbGroup *pGroup = new AcDbGroup(strName);

 AcDbDictionary *pGroupDict;
 es=pDb->getGroupDictionary(pGroupDict, AcDb::kForWrite);
 if(es!=Acad::eOk)
 {
  return es;
 }

 AcDbObjectId groupId;
 pGroupDict->setAt(strName, pGroup, groupId);
 pGroupDict->close();
 pGroup->close();

 es=makeGroup(groupId,ids);
 return es;
}