關閉圖層問題

lgq19851005

我在自己的程序前面建立了名为 1,2,3的图层,在不同的图层绘制了不同的实体.

在某一步时,我想关闭图层1和2,只显示图层3的实体,请问如何用objectarx实现,谢谢

松竹

遍历图层表的记录，使用AcDbLayerTableRecord 对象的

void setIsOff(bool off);

关闭图层

luowy

1. //-------------------------------------------------------------------------------

复制代码

1. //将关闭层1、2，显示层3，以下内容在ARX08测试成功

复制代码

1. //多看书，这个不难

复制代码

void fun()
{
AcDbLayerTable *pLayerTable;
acdbHostApplicationServices()->workingDatabase()->getLayerTable( pLayerTable, AcDb::kForRead );
AcDbLayerTableIterator *pItr;
AcDbLayerTableRecord *pLayerTableRecord;
ACHAR *layerName;
pLayerTable->newIterator( pItr );
for ( pItr->start(); !pItr->done(); pItr->step() )
{
  pItr->getRecord( pLayerTableRecord, AcDb::kForWrite );
  pLayerTableRecord->getName( layerName );
  if ( _tcscmp( layerName, _T("1")) == 0 || _tcscmp( layerName, _T("2")) ==0 )
  {
   pLayerTableRecord->setIsOff( true );
  }
  if ( _tcscmp( layerName, _T("3")) == 0 )
  {
   pLayerTableRecord->setIsOff( false );
  }
  pLayerTableRecord->close();
  free( layerName );
}
delete pItr;
pLayerTable->close();
}

liub1979

再贴一个，希望对你有帮助

Adesk::Boolean SetIsOff (const char* lyrname,
          bool off)
{
 AcDbLayerTable *pLyrTable;
 AcDbLayerTableRecord *pLyrTblRecord;
 
 AcDbDatabase *pCurDb = NULL;
 pCurDb = acdbHostApplicationServices()->workingDatabase();
 
 // 获得当前图形的层表
 pCurDb->getLayerTable(pLyrTable, AcDb::kForRead);
 AcDbObjectId lyrId;
 // 是否已经包含指定的层表记录
 if (!pLyrTable->has(lyrname) && !(lyrname == "*"))
 {
  pLyrTable->close();
  return Adesk::kFalse;
 }
 else
 {
  pLyrTable->getAt(lyrname, lyrId);
 }
 AcDbLayerTableIterator *pItr;
 pLyrTable->newIterator(pItr);
 if (lyrname == "*")
 {
  for (pItr->start(); !pItr->done(); pItr->step())
  { // 遍历器记录
   pItr->getRecord(pLyrTblRecord, AcDb::kForWrite); 
   pLyrTblRecord->setIsOff(off);
   pLyrTblRecord->close();
  }
 }
 else
 {
  for (pItr->start(); !pItr->done(); pItr->step())
  { // 遍历器记录
   if(pItr->seek(lyrId) == Acad::eOk)
   {
    pItr->getRecord(pLyrTblRecord, AcDb::kForWrite); 
    pLyrTblRecord->setIsOff(off);
    pLyrTblRecord->close();
    break;
   }
  }
 }
 delete pItr;
 
 pLyrTable->close();
 return Adesk::kTrue;
}