annotate data/model/PowerOfSqrtTwoZoomConstraint.h @ 1455:ec9e65fcf749

The use of the begin/end pairs here just seems to cause too many rows to be deleted (from the visual representation, not the underlying model). Things apparently work better if we just modify the underlying model and let the change signals percolate back up again. To that end, update the change handlers so as to cover their proper ranges with dataChanged signals.
author Chris Cannam
date Mon, 23 Apr 2018 16:03:35 +0100
parents 48e9f538e6e9
children 710e6250a401 a7485c1bdba5
rev   line source
Chris@147 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@147 2
Chris@147 3 /*
Chris@147 4 Sonic Visualiser
Chris@147 5 An audio file viewer and annotation editor.
Chris@147 6 Centre for Digital Music, Queen Mary, University of London.
Chris@147 7 This file copyright 2006 Chris Cannam.
Chris@147 8
Chris@147 9 This program is free software; you can redistribute it and/or
Chris@147 10 modify it under the terms of the GNU General Public License as
Chris@147 11 published by the Free Software Foundation; either version 2 of the
Chris@147 12 License, or (at your option) any later version. See the file
Chris@147 13 COPYING included with this distribution for more information.
Chris@147 14 */
Chris@147 15
Chris@147 16 #ifndef _POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H_
Chris@147 17 #define _POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H_
Chris@147 18
Chris@147 19 #include "base/ZoomConstraint.h"
Chris@147 20
Chris@147 21 class PowerOfSqrtTwoZoomConstraint : virtual public ZoomConstraint
Chris@147 22 {
Chris@147 23 public:
Chris@929 24 virtual int getNearestBlockSize(int requestedBlockSize,
Chris@1429 25 RoundingDirection dir = RoundNearest)
Chris@1429 26 const;
Chris@147 27
Chris@929 28 virtual int getNearestBlockSize(int requestedBlockSize,
Chris@1429 29 int &type,
Chris@1429 30 int &power,
Chris@1429 31 RoundingDirection dir = RoundNearest)
Chris@1429 32 const;
Chris@1429 33
Chris@929 34 virtual int getMinCachePower() const { return 6; }
Chris@147 35 };
Chris@147 36
Chris@147 37 #endif
Chris@147 38