svcore  1.9
PowerOfSqrtTwoZoomConstraint.h
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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 2006 Chris Cannam.
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 _POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H_
00017 #define _POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H_
00018 
00019 #include "base/ZoomConstraint.h"
00020 
00021 class PowerOfSqrtTwoZoomConstraint : virtual public ZoomConstraint
00022 {
00023 public:
00024     virtual int getNearestBlockSize(int requestedBlockSize,
00025                                        RoundingDirection dir = RoundNearest)
00026         const;
00027     
00028     virtual int getNearestBlockSize(int requestedBlockSize,
00029                                        int &type,
00030                                        int &power,
00031                                        RoundingDirection dir = RoundNearest)
00032         const;
00033         
00034     virtual int getMinCachePower() const { return 6; }
00035 };
00036 
00037 #endif
00038