selectionSceneIndexObserver.h

//
// Copyright 2022 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HDX_SELECTION_SCENE_INDEX_OBSERVER_H
#define PXR_IMAGING_HDX_SELECTION_SCENE_INDEX_OBSERVER_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdx/api.h"
#include "pxr/imaging/hd/selection.h"
#include "pxr/imaging/hd/sceneIndexObserver.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdxSelectionSceneIndexObserver : public HdSceneIndexObserver
{
public:
    HDX_API
    HdxSelectionSceneIndexObserver();
 
    HDX_API
    void SetSceneIndex(HdSceneIndexBaseRefPtr const &sceneIndex);
 
    HDX_API
    int GetVersion() const;
 
    HDX_API
    HdSelectionSharedPtr GetSelection();
 
    HDX_API
    void PrimsAdded(
        const HdSceneIndexBase &sender,
        const AddedPrimEntries &entries) override;
    HDX_API
    void PrimsDirtied(
        const HdSceneIndexBase &sender,
        const DirtiedPrimEntries &entries) override;
    HDX_API
    void PrimsRemoved(
        const HdSceneIndexBase &sender,
        const RemovedPrimEntries &entries) override;
    
    HDX_API
    void PrimsRenamed(
        const HdSceneIndexBase &sender,
        const RenamedPrimEntries &entries) override;
 
private:
    HdSelectionSharedPtr _ComputeSelection();
 
    HdSceneIndexBaseRefPtr _sceneIndex;
 
    int _version;
    HdSelectionSharedPtr _selection;
    SdfPathSet _dirtiedPrims;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif