File indexing completed on 2025-01-26 03:34:10 

0001 /*
0002     File                 : CartesianScale.h
0003     Project              : LabPlot
0004     Description          : Cartesian coordinate system for plots.
0005     --------------------------------------------------------------------
0006     SPDX-FileCopyrightText: 2012-2016 Alexander Semke <alexander.semke@web.de>
0007     SPDX-FileCopyrightText: 2020-2021 Stefan Gerlach <stefan.gerlach@uni.kn>
0008 
0009     SPDX-License-Identifier: GPL-2.0-or-later
0010 */
0011 
0012 #ifndef CARTESIANSCALE_H
0013 #define CARTESIANSCALE_H
0014 
0015 #include "backend/lib/Range.h"
0016 
0017 class CartesianScale {
0018 public:
0019     virtual ~CartesianScale();
0020 
0021     static CartesianScale* createLinearScale(const Range<double>& range, const Range<double>& sceneRange, const Range<double>& logicalRange);
0022     static CartesianScale* createLogScale(const Range<double>& range, const Range<double>& sceneRange, const Range<double>& logicalRange, RangeT::Scale);
0023     static CartesianScale* createSqrtScale(const Range<double>& range, const Range<double>& sceneRange, const Range<double>& logicalRange);
0024     static CartesianScale* createSquareScale(const Range<double>& range, const Range<double>& sceneRange, const Range<double>& logicalRange);
0025     static CartesianScale* createInverseScale(const Range<double>& range, const Range<double>& sceneRange, const Range<double>& logicalRange);
0026 
0027     virtual void getProperties(Range<double>* range = nullptr, double* a = nullptr, double* b = nullptr, double* c = nullptr) const;
0028 
0029     inline double start() const {
0030         return m_range.start();
0031     }
0032     inline double end() const {
0033         return m_range.end();
0034     }
0035     inline Range<double> range() const {
0036         return m_range;
0037     }
0038     inline bool contains(double value) const {
0039         return m_range.contains(value);
0040     }
0041 
0042     virtual bool map(double*) const = 0;
0043     virtual bool inverseMap(double*) const = 0;
0044     virtual int direction() const = 0;
0045 
0046 protected:
0047     CartesianScale(const Range<double>& range, double a, double b, double c);
0048     Range<double> m_range;
0049     /// Those parameters define the scaling
0050     /// They will be set by the linear, log, sqrt, ... scales
0051     /// See the definition of the different scales for their meaning
0052     double m_a;
0053     double m_b;
0054     double m_c;
0055 };
0056 
0057 #endif