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发表于 2005-8-22 10:47:00
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这是一本书中的例子，每一行代码的例子我还不太懂，你自己看看吧．其中包括插入块的代码．
void insrtBlk()
{
char blkName[50];
AcDbDatabase *pCurDb;
AcDbBlockTable *pBlkTable;
AcDbBlockTableRecord *pBlkTableRecord;
AcDbBlockTableRecord *pBlkDefRecord;
AcDbBlockReference *pInsrtObj;
AcDbEntity *pEnt;
AcDbBlockTableRecordIterator *pIterator;
AcDbAttributeDefinition *pAttDef;
AcDbAttribute *pAtt;
AcDbObjectId blkId;
AcDbObjectId insrtId;
char *pTagPrompt;
AcGePoint3d insPt;
AcGePoint3d basePt;
int retCode;
retCode = acedGetString(0, "\nEnter Block Name: ", blkName);
if(retCode != RTNORM || blkName[0] == '\0')
{
acutPrintf("\nInvalid block name.");
return;
}
pCurDb = acdbHostApplicationServices()->workingDatabase();
// Check to see if the block table
// has blkName
pCurDb->getBlockTable(pBlkTable, AcDb::kForRead);
if(!pBlkTable->has(blkName))
{
acutPrintf("\nBlock definition %s not found. ", blkName);
pBlkTable->close();
return;
}
// Get the AcDbObjectId of the block
// definition.
pBlkTable->getAt(blkName, blkId);
pBlkTable->getAt(ACDB_MODEL_SPACE, pBlkTableRecord, AcDb::kForWrite);
pBlkTable->close();
acedInitGet(RSG_NONULL, NULL);
acedGetPoint(NULL, "\nPick insertion point: ", asDblArray(insPt));
pInsrtObj = new AcDbBlockReference(insPt, blkId);
// Here is where you can set scale, rotation and other
// properties to the block entity. If you want to
// see the AcDbBlockReference class for more details.
pBlkTableRecord->appendAcDbEntity(insrtId, pInsrtObj);
acdbOpenObject(pBlkDefRecord, blkId, AcDb::kForRead);
// Now check to see if the Block Definition
// has attributes. If it does we will add
// a Block Table Record Iterator to step through
// the entities and find the Attribute Definitions.
if(pBlkDefRecord->hasAttributeDefinitions())
{
pBlkDefRecord->newIterator(pIterator);
for(pIterator->start(); !pIterator->done(); pIterator->step())
{
pIterator->getEntity(pEnt, AcDb::kForRead);
// Check to see if the entity is an
// attribute definition.
pAttDef = AcDbAttributeDefinition::cast(pEnt);
if(pAttDef != NULL && !pAttDef->isConstant())
{
// If it is and its not constant
// create a new attribute
pAtt = new AcDbAttribute();
// setPropertiesFrom will copy
// Color, Layer, Linetype,Linetype scale and
// Visibility.
pAtt->setPropertiesFrom(pAttDef);
// setup more properties from the attribute
// definition
pAtt->setInvisible(pAttDef->isInvisible());
basePt = pAttDef->position();
basePt += pInsrtObj->position().asVector();
pAtt->setPosition(basePt);
pAtt->setHeight(pAttDef->height());
pAtt->setRotation(pAttDef->rotation());
// Take note how we get the tag.
pTagPrompt = pAttDef->tag();
pAtt->setTag(pTagPrompt);
free(pTagPrompt);
// Normally you would prompt the user
// and ask for input values.
pTagPrompt = pAttDef->prompt();
acutPrintf("%s%s", "\n", pTagPrompt);
free(pTagPrompt);
// The setFieldLength is not required
// even though it is listed in the
// documentation.
pAtt->setFieldLength(25);
// setTextString is the value the
// attribute receives which would
// normally be a user input value.
pAtt->setTextString("This is a test");
pInsrtObj->appendAttribute(pAtt);
pAtt->close();
}
pEnt->close();
}// for
delete pIterator；
}// if has attribute definitions
// Note that we close the Model Space
// block table record after we have added
// our attributes.
pBlkTableRecord->close();
pInsrtObj->close();
} |
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