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