svgui
1.9
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00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ 00002 00003 /* 00004 Sonic Visualiser 00005 An audio file viewer and annotation editor. 00006 Centre for Digital Music, Queen Mary, University of London. 00007 This file copyright 2007 QMUL. 00008 00009 This program is free software; you can redistribute it and/or 00010 modify it under the terms of the GNU General Public License as 00011 published by the Free Software Foundation; either version 2 of the 00012 License, or (at your option) any later version. See the file 00013 COPYING included with this distribution for more information. 00014 */ 00015 00016 #ifndef _SLICEABLE_LAYER_H_ 00017 #define _SLICEABLE_LAYER_H_ 00018 00019 #include "Layer.h" 00020 00026 class SliceableLayer : public Layer 00027 { 00028 Q_OBJECT 00029 00030 public: 00031 // Get a model that can be sliced, i.e. a 00032 // DenseThreeDimensionalModel. This may be the layer's usual 00033 // model, or it may be a model derived from it (e.g. FFTModel in a 00034 // spectrogram that was constructed from a DenseTimeValueModel). 00035 // The SliceableLayer retains ownership of the model, and will 00036 // emit sliceableModelReplaced if it is about to become invalid. 00037 virtual const Model *getSliceableModel() const = 0; 00038 00039 signals: 00040 // Emitted when a model that was obtained through 00041 // getSliceableModel is about to be deleted. If replacement is 00042 // non-NULL, it may be used instead. 00043 void sliceableModelReplaced(const Model *modelToBeReplaced, 00044 const Model *replacement); 00045 }; 00046 00047 #endif 00048 00049 00050