MStatus ObjectParameterHandler::doSetValue( const MPlug &plug, IECore::ParameterPtr parameter ) const
{
IECore::ObjectParameterPtr p = IECore::runTimeCast<IECore::ObjectParameter>( parameter );
if( !p )
{
return MS::kFailure;
}
/// Keep trying all the available handlers until we find one that works
for (IECore::ObjectParameter::TypeIdSet::const_iterator it = p->validTypes().begin(); it != p->validTypes().end(); ++it)
{
ConstParameterHandlerPtr h = ParameterHandler::create( *it );
if (h)
{
if ( h->doSetValue( plug, parameter ) )
{
return MS::kSuccess;
}
}
}
MStatus s;
MObject plugData;
s = plug.getValue( plugData );
if (!s)
{
// We might be here as the attribute isn't storable,
// in that case we set the parameter to its default value.
// If it is storable, then something has gone awry.
MFnAttribute fnA( plug.attribute() );
bool isStorable = fnA.isStorable( &s );
if( s && !isStorable )
{
parameter->setValue( parameter->defaultValue()->copy() );
return MS::kSuccess;
}
else
{
return MS::kFailure;
}
}
MFnPluginData fnData( plugData, &s );
if (!s)
{
return MS::kFailure;
}
ObjectData *data = dynamic_cast<ObjectData *>( fnData.data( &s ) );
if (!data || !s)
{
return MS::kFailure;
}
parameter->setValue( data->getObject() );
return MS::kSuccess;
}
