view data/model/PowerOfSqrtTwoZoomConstraint.h @ 1671:82d03c9661f9 single-point

Rework isReady()/getCompletion() on models. Previously the new overhauled models were implementing getCompletion() but inheriting a version of isReady() (from the Model base) that didn't call it, referring only to isOK(). So they were reporting completion as soon as they had begun. Instead hoist getCompletion() to abstract base and call it from Model::isReady().

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef SV_POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H
#define SV_POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H

#include "base/ZoomConstraint.h"

class PowerOfSqrtTwoZoomConstraint : virtual public ZoomConstraint
{
public:
    virtual ZoomLevel getNearestZoomLevel(ZoomLevel requested,
                                          RoundingDirection dir = RoundNearest)
	const override;
	
    virtual int getMinCachePower() const { return 6; }

    virtual int getNearestBlockSize(int requestedBlockSize,
                                    int &type,
                                    int &power,
                                    RoundingDirection dir = RoundNearest)
        const;
};

#endif