ARX中如何insert一个图(zt)

在实践中常常要将外部的图形文件source.dwg中插入到另外一个图形中或者当前图形中.以插入到当前图形dest.dwg为例.
    为了将一个source.dwg插入dest.dwg中,首先要找到source.dwg这个文件. 我们可以使用各种基本的技术和相应的规则从你的机器上或PDM数据库中检索到你要插入的source.dwg, 返回来一个字符窜sFileName代表整个文件及其路径.
    然后创建一个空的数据库pNewDb读入source.dwg.
AcDbDatabase *pNewDb =new AcDbDatabase(Adesk::kFalse);
//在这里一定要用Adesk::kFalse
acDocManager->lockDocument(acDocManager->curDocument()) ;//如果确定你不需要LockDocument, 这一行可以不要

es=pNewDb->readDwgFile(sFileName , _SH_DENYNO,false);
if (es!=Acad::eOk)
{
    acutPrintf("\nThe file %s cannot be opend",sFileName);
    return;
}

    这样,source.dwg以经用pNewDb来表示了. 我们用pDb来表示当前数据库
AcDbDatabase *pDb;
pDb =acdbHostApplicationServices ()->workingDatabase () ;

    现在,我们用Insert来插入数据库. Insert有两种用法,一种是直接insert, source.dwg中的图元实体被分散地插入pDb中
pDb->insert( AcGeMatrix3d::kIdentity, pNewDb );//这里假定不对source.dwg做比例和转角的变换. 如果我们在这里结束程序,我们能看到source.dwg已经被插入,但不是一个图块.

    另外一种插入法是要求插入后source.dwg成为一个图块,图块的attribute也要从source.dwg中得到.这种方法要做大量的工作.首先运行insert()

CString pBlockName=”TestBlock”;
AcDbObjectId blockId;
if((es=pDb->insert(blockId, pBlockName,pNewDb, true))==Acad::eOk)
{
    acutPrintf("\ninsert ok\n");
}
else
{
AfxMessageBox("Insert failed");
delete pNewDb;
return;
}

//这里blcokId是insert运行后产生的,它代表的是一个块表记录AcDbBlockRecord的ID. pBlockName是记录名,要在insert运行前设定其值.
    如果我们在这里结束程序,我们看不到任何东西,因为source并没有真正被插入.我们还要做一些事,首先是创建一个AcDbBlockReference, 并将它指向blockId所代表的AcDbBlockRecord, 然后将这个AcDbBlockReference加入pDb所代表的图形数据库中.
AcDbBlockReference *pBlkRef = new AcDbBlockReference;
pBlkRef->setBlockTableRecord(blockId);//指向blockId;
pBlkRef->setPosition(Pt);//设定位置
pBlkRef->setRotation(Angle);//设定转角
pBlkRef->setScaleFactors( XrefScale);//设定放大比例

AcDbBlockTable *pBlockTable;
pDb->getSymbolTable(pBlockTable, AcDb::kForRead);

AcDbBlockTableRecord *pBlockTableRecord;
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
pBlockTable->close();
AcDbObjectId newEntId;
pBlockTableRecord->appendAcDbEntity(newEntId, pBlkRef);
pBlockTableRecord->close();

    如果我们在这里结束程序,我们将看到当前图形中source.dwg已经被作为图块插入.但是图块中没有source.dwg所定义的Attibute. 因此我们还要做工作.后面的事情就简单了.

AcDbBlockTableRecord *pBlockDef;
acdbOpenObject(pBlockDef, blockId, AcDb::kForRead);

AcDbBlockTableRecordIterator *pIterator;
pBlockDef->newIterator(pIterator);
AcGePoint3d basePoint;
AcDbEntity *pEnt;
AcDbAttributeDefinition *pAttdef;
for (pIterator->start(); !pIterator->done();
        pIterator->step())//将source.dwg中所有的Attibute进行遍历
{
        pIterator->getEntity(pEnt, AcDb::kForRead);
        pAttdef = AcDbAttributeDefinition::cast(pEnt);
        if (pAttdef != NULL && !pAttdef->isConstant()) {
            AcDbAttribute *pAtt = new AcDbAttribute();
            pAtt->setPropertiesFrom(pAttdef);
            pAtt->setInvisible(pAttdef->isInvisible());
            basePoint = pAttdef->position();
            basePoint += pBlkRef->position().asVector();
            pAtt->setPosition(basePoint);
            pAtt->setHeight(pAttdef->height());
            pAtt->setRotation(pAttdef->rotation());
            pAtt->setTag("Tag");
            pAtt->setFieldLength(25);
            char *pStr = pAttdef->tag();
            pAtt->setTag(pStr);
           acutDelString(pStr);
            pAtt->setFieldLength(pAttdef->fieldLength());
            pAtt->setTextString("-");

            AcDbObjectId attId;

            pBlkRef->appendAttribute(attId, pAtt);
            pAtt->close();
        }
        pEnt->close(); // use pEnt... pAttdef might be NULL
    }
delete pIterator;

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