svgui  1.9
SliceableLayer.h
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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2 
3 /*
4  Sonic Visualiser
5  An audio file viewer and annotation editor.
6  Centre for Digital Music, Queen Mary, University of London.
7  This file copyright 2007 QMUL.
8 
9  This program is free software; you can redistribute it and/or
10  modify it under the terms of the GNU General Public License as
11  published by the Free Software Foundation; either version 2 of the
12  License, or (at your option) any later version. See the file
13  COPYING included with this distribution for more information.
14 */
15 
16 #ifndef _SLICEABLE_LAYER_H_
17 #define _SLICEABLE_LAYER_H_
18 
19 #include "Layer.h"
20 
26 class SliceableLayer : public Layer
27 {
28  Q_OBJECT
29 
30 public:
31  // Get a model that can be sliced, i.e. a
32  // DenseThreeDimensionalModel. This may be the layer's usual
33  // model, or it may be a model derived from it (e.g. FFTModel in a
34  // spectrogram that was constructed from a DenseTimeValueModel).
35  // The SliceableLayer retains ownership of the model, and will
36  // emit sliceableModelReplaced if it is about to become invalid.
37  virtual const Model *getSliceableModel() const = 0;
38 
39 signals:
40  // Emitted when a model that was obtained through
41  // getSliceableModel is about to be deleted. If replacement is
42  // non-NULL, it may be used instead.
43  void sliceableModelReplaced(const Model *modelToBeReplaced,
44  const Model *replacement);
45 };
46 
47 #endif
48 
49 
50 
The base class for visual representations of the data found in a Model.
Definition: Layer.h:52
void sliceableModelReplaced(const Model *modelToBeReplaced, const Model *replacement)
Base class for layers that can be sliced, that is, that contain models appropriate for use in a Slice...
virtual const Model * getSliceableModel() const =0