ParameterHandlerPtr CompoundParameterHandler::handler( const ParameterPtr child, bool createIfMissing )
{
HandlerMap::const_iterator it = m_handlers.find( child );
if( it!=m_handlers.end() )
{
return it->second;
}
ParameterHandlerPtr h = 0;
if( createIfMissing )
{
IECore::ConstBoolDataPtr noHostMapping = child->userData()->member<BoolData>( "noHostMapping" );
if( !noHostMapping || !noHostMapping->readable() )
{
h = ParameterHandler::create( child );
if( !h )
{
IECore::msg( IECore::Msg::Warning, "Gaffer::CompoundParameterHandler", boost::format( "Unable to create handler for parameter \"%s\" of type \"%s\"" ) % child->name() % child->typeName() );
}
}
}
m_handlers[child] = h;
return h;
}
MStatus NumericParameterHandler<T>::doUpdate( IECore::ConstParameterPtr parameter, MPlug &plug ) const
{
typename IECore::NumericParameter<T>::ConstPtr p = IECore::runTimeCast<const IECore::NumericParameter<T> >( parameter );
if( !p )
{
return MS::kFailure;
}
MObject attribute = plug.attribute();
MFnNumericAttribute fnNAttr( attribute );
if( !fnNAttr.hasObj( attribute ) )
{
return MS::kFailure;
}
if( fnNAttr.unitType() != NumericTraits<T>::dataType() )
{
return MS::kFailure;
}
fnNAttr.setDefault( p->numericDefaultValue() );
if( p->minValue()!=Imath::limits<T>::min() )
{
fnNAttr.setMin( p->minValue() );
}
else
{
// parameter has no min value
if( fnNAttr.hasMin() )
{
// there is no way of unsetting a minimum value
// in maya.
return MS::kFailure;
}
}
if( p->maxValue()!=Imath::limits<T>::max() )
{
fnNAttr.setMax( p->maxValue() );
}
else
{
// parameter has no max value
if( fnNAttr.hasMax() )
{
// there is no way of unsetting a maximum value
// in maya.
return MS::kFailure;
}
}
T v;
MStatus result = plug.getValue( v );
if( result )
{
IECore::ObjectPtr d = new IECore::TypedData<T>( v );
if( !parameter->valueValid( d.get() ) )
{
return MS::kFailure;
}
}
bool keyable = true;
bool channelBox = true;
const IECore::ConstCompoundObjectPtr userData = parameter->userData();
assert( userData );
const IECore::ConstCompoundObjectPtr maya = userData->member<const IECore::CompoundObject>("maya");
if (maya)
{
const IECore::ConstBoolDataPtr keyableData = maya->member<const IECore::BoolData>("keyable");
if (keyableData)
{
keyable = keyableData->readable();
}
const IECore::ConstBoolDataPtr channelBoxData = maya->member<const IECore::BoolData>("channelBox");
if (channelBoxData)
{
channelBox = channelBoxData->readable();
}
}
fnNAttr.setKeyable( keyable );
// Calling setChannelBox(true) disables keying
if (!keyable)
{
fnNAttr.setChannelBox( channelBox );
}
return finishUpdating( parameter, plug );
}