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 2006 Chris Cannam.
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 SV_POWER_OF_TWO_ZOOM_CONSTRAINT_H
17 #define SV_POWER_OF_TWO_ZOOM_CONSTRAINT_H
18 
19 #include "base/ZoomConstraint.h"
20 
21 class PowerOfTwoZoomConstraint : virtual public ZoomConstraint
22 {
23 public:
24     virtual ZoomLevel getNearestZoomLevel(ZoomLevel requested,
25                                           RoundingDirection dir = RoundNearest)
26 	const override;
27 
28 protected:
29     virtual int getNearestBlockSize(int requested,
30                                     RoundingDirection dir = RoundNearest)
31         const;
32 };
33 
34 #endif
35 
36