[每日一码] 如何通过程序创建一个多线样式（AcDbMlineStyle）
// minimal error checking for code brevityvoid createMlineStyle()
{
AcDbLinetypeTable* pTable = NULL;
AcDbObjectId id;
AcDbDatabase* pDb = curDoc()->database();
// open ByLayer linetypetablerecord for use in MLineStyle later
pDb->getLinetypeTable(pTable, AcDb::kForRead);
if((pTable->getAt(L"ByLayer", id)) != Acad::eOk)
{
acutPrintf(L"\nlinetype ByLayer not found.");
return;
}
pTable->close();
AcDbDictionary* pDict = NULL;
// open MLStyleDictionary (its sored in the NOD)
Acad::ErrorStatus es = pDb->getMLStyleDictionary(pDict, AcDb::kForRead);
if(es != Acad::eOk)
{
acutPrintf(L"\nCan't open mline style dictionary for read.");
return;
}
const ACHAR mlineStyleName[] = L"test";
AcDbMlineStyle* ps = NULL;
// does MLStyle "test" already exist?
es = pDict->getAt(mlineStyleName, (AcDbObject*&)ps, AcDb::kForWrite);
// If it doesn't exist, create it
if(es != Acad::eOk)
{
ps = new AcDbMlineStyle;
AcDbObjectId mId;
ps->initMlineStyle();
pDict->upgradeOpen();
pDict->setAt(mlineStyleName, ps, mId);
}
pDict->close();
// set MLStyle attributes and elements
es = ps->setName(mlineStyleName);
AcCmColor cm; cm.setColorIndex(256);
int a=0, b=0;
es = ps->addElement(a, -0.25, cm, id);
assert(es == Acad::eOk);
es = ps->addElement(b, 0.25, cm, id);
assert(es == Acad::eOk);
ps->close();
acutPrintf(L"\nMline style: %s created.", mlineStyleName);
}
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