CWE-ou-minkata/Sources/Tools/MaxPlasmaMtls/Materials/plNoteTrackWatcher.cpp

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//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  plNoteTrackWatcher - Dummy object to watch for notetrack additions or   //
//                       removals from the main material that owns it.      //
//                       All of this is required because MAX will notify    //
//                       an object's dependents about notetrack actions but //
//                       NOT the object itself, and the Add/DeleteNoteTrack //
//                       functions are non-virtual. ARRRGH!                 //
//                                                                          //
//////////////////////////////////////////////////////////////////////////////

#include "hsTypes.h"
#include "plNoteTrackWatcher.h"
#include "plPassMtlBase.h"

#include "iparamm2.h"

#include "../resource.h"


//// Watcher Class Desc //////////////////////////////////////////////////////

plNoteTrackWatcher::plNoteTrackWatcher( plPassMtlBase *parentMtl ) : fParentMtl(nil)
{
    fNoteTrackCount = parentMtl->NumNoteTracks();
    ReplaceReference(kRefParentMtl, parentMtl);
}

plNoteTrackWatcher::~plNoteTrackWatcher()
{
    if( fParentMtl != nil )
    {
        fParentMtl->fNTWatcher = nil;
        DeleteReference( kRefParentMtl );
    }
    DeleteAllRefsFromMe();
}

BOOL    plNoteTrackWatcher::IsRealDependency( ReferenceTarget *rtarg )
{
    if( rtarg == fParentMtl )
        return false;

    return true;
}

int plNoteTrackWatcher::NumRefs()
{
    return 1;
}

RefTargetHandle plNoteTrackWatcher::GetReference( int i )
{
    if( i == kRefParentMtl )
        return fParentMtl;

    return nil;
}

void plNoteTrackWatcher::SetReference( int i, RefTargetHandle rtarg )
{
    if( i == kRefParentMtl )
        fParentMtl = (plPassMtlBase *)rtarg;
}

RefResult plNoteTrackWatcher::NotifyRefChanged(Interval changeInt, RefTargetHandle hTarget, PartID& partID, RefMessage message)
{
    switch( message )
    {
        case REFMSG_SUBANIM_STRUCTURE_CHANGED:
            if( hTarget == fParentMtl && fParentMtl != nil )
            {
                // Structure of parent material changed--did it gain or lose a notetrack?
                int oldCount = fNoteTrackCount;
                fNoteTrackCount = fParentMtl->NumNoteTracks();
                if( oldCount != fNoteTrackCount )
                {
                    // Is it an addition?
                    if( fNoteTrackCount > oldCount )
                        // Yes, notify parent.
                        fParentMtl->NoteTrackAdded();
                    else 
                        // Deletion, also notify parent
                        fParentMtl->NoteTrackRemoved();
                }
            }
            break;

        case REFMSG_NODE_NAMECHANGE:
            if( hTarget == fParentMtl )
            {
                fParentMtl->NameChanged();
            }
            break;

        case REFMSG_TARGET_DELETED:
            fParentMtl = nil;
            break;
    }

    return REF_SUCCEED;
}