{
TCollection_ExtendedString aValue(theValue.c_str());
if (!myIsInitialized || myString->Get() != aValue) {
+ if (myString.IsNull())
+ myString = TDataStd_Name::Set(myLab, TCollection_ExtendedString());
myString->Set(aValue);
owner()->data()->sendAttributeUpdated(this);
}
std::string Model_AttributeString::value()
{
+ if (myString.IsNull())
+ return ""; // not initialized
return TCollection_AsciiString(myString->Get()).ToCString();
}
Model_AttributeString::Model_AttributeString(TDF_Label& theLabel)
+{
+ myLab = theLabel;
+ reinit();
+}
+
+void Model_AttributeString::reinit()
{
// check the attribute could be already presented in this doc (after load document)
- myIsInitialized = theLabel.FindAttribute(TDataStd_Name::GetID(), myString) == Standard_True;
- if (!myIsInitialized) {
- // create attribute: not initialized by value yet, just empty string
- myString = TDataStd_Name::Set(theLabel, TCollection_ExtendedString());
- }
+ myIsInitialized = myLab.FindAttribute(TDataStd_Name::GetID(), myString) == Standard_True;
}