lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     This file copyright 2007 QMUL.
lbajardsilogic@0:     
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: #ifndef _SLICEABLE_LAYER_H_
lbajardsilogic@0: #define _SLICEABLE_LAYER_H_
lbajardsilogic@0: 
lbajardsilogic@0: #include "Layer.h"
lbajardsilogic@0: 
lbajardsilogic@0: /**
lbajardsilogic@0:  * Base class for layers that can be sliced, that is, that contain
lbajardsilogic@0:  * models appropriate for use in a SliceLayer.
lbajardsilogic@0:  */
lbajardsilogic@0: 
lbajardsilogic@0: class SliceableLayer : public Layer
lbajardsilogic@0: {
lbajardsilogic@0:     Q_OBJECT
lbajardsilogic@0: 
lbajardsilogic@0: public:
lbajardsilogic@0:     // Get a model that can be sliced, i.e. a
lbajardsilogic@0:     // DenseThreeDimensionalModel.  This may be the layer's usual
lbajardsilogic@0:     // model, or it may be a model derived from it (e.g. FFTModel in a
lbajardsilogic@0:     // spectrogram that was constructed from a DenseTimeValueModel).
lbajardsilogic@0:     // The SliceableLayer retains ownership of the model, and will
lbajardsilogic@0:     // emit sliceableModelReplaced if it is about to become invalid.
lbajardsilogic@0:     virtual const Model *getSliceableModel() const = 0;
lbajardsilogic@0: 
lbajardsilogic@0: signals:
lbajardsilogic@0:     // Emitted when a model that was obtained through
lbajardsilogic@0:     // getSliceableModel is about to be deleted.  If replacement is
lbajardsilogic@0:     // non-NULL, it may be used instead.
lbajardsilogic@0:     void sliceableModelReplaced(const Model *modelToBeReplaced,
lbajardsilogic@0:                                 const Model *replacement);
lbajardsilogic@0: };
lbajardsilogic@0: 
lbajardsilogic@0: #endif
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: