annotate layer/HorizontalScaleProvider.h @ 1333:59f6830be8d8 zoom

A further refactor with range blocks
author Chris Cannam
date Fri, 21 Sep 2018 14:22:53 +0100
parents b4cb11ca8233
children
rev   line source
Chris@1276 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@1276 2
Chris@1276 3 /*
Chris@1276 4 Sonic Visualiser
Chris@1276 5 An audio file viewer and annotation editor.
Chris@1276 6 Centre for Digital Music, Queen Mary, University of London.
Chris@1276 7 This file copyright 2006-2018 Chris Cannam and QMUL.
Chris@1276 8
Chris@1276 9 This program is free software; you can redistribute it and/or
Chris@1276 10 modify it under the terms of the GNU General Public License as
Chris@1276 11 published by the Free Software Foundation; either version 2 of the
Chris@1276 12 License, or (at your option) any later version. See the file
Chris@1276 13 COPYING included with this distribution for more information.
Chris@1276 14 */
Chris@1276 15
Chris@1276 16 #ifndef SV_HORIZONTAL_SCALE_PROVIDER_H
Chris@1276 17 #define SV_HORIZONTAL_SCALE_PROVIDER_H
Chris@1276 18
Chris@1276 19 class LayerGeometryProvider;
Chris@1276 20
Chris@1276 21 /**
Chris@1276 22 * Interface to be implemented by objects, such as layers or objects
Chris@1276 23 * they delegate to, in which the X axis corresponds to frequency. For
Chris@1276 24 * example, SpectrumLayer.
Chris@1276 25 */
Chris@1276 26 class HorizontalScaleProvider
Chris@1276 27 {
Chris@1276 28 public:
Chris@1276 29 virtual double getFrequencyForX(const LayerGeometryProvider *,
Chris@1276 30 double x)
Chris@1276 31 const = 0;
Chris@1276 32
Chris@1276 33 virtual double getXForFrequency(const LayerGeometryProvider *,
Chris@1276 34 double freq)
Chris@1276 35 const = 0;
Chris@1276 36 };
Chris@1276 37
Chris@1276 38 #endif