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116 lines
4.2 KiB
116 lines
4.2 KiB
/* BEGIN COPYRIGHT
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*
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* This file is part of Noted.
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*
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* Copyright ©2011, 2012, Lancaster Logic Response Limited.
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*
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* Noted is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* Noted is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Noted. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <map>
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#include <vector>
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#include <string>
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#include <utility>
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#include <functional>
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#include <QtGui/QBrush>
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#include <QtCore/QRect>
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class QPainter;
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namespace lb
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{
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class Grapher
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{
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public:
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Grapher(): p(0) {}
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void init(QPainter* _p, std::pair<float, float> _xRange, std::pair<float, float> _yRange, std::function<std::string(float _f)> _xLabel, std::function<std::string(float _f)> _yLabel, std::function<std::string(float, float)> _pLabel, int _leftGutter = 30, int _bottomGutter = 16);
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void init(QPainter* _p, std::pair<float, float> _xRange, std::pair<float, float> _yRange, std::function<std::string(float _f)> _xLabel, std::function<std::string(float _f)> _yLabel, std::function<std::string(float, float)> _pLabel, QRect _active)
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{
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p = _p;
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active = _active;
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xRange = _xRange;
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yRange = _yRange;
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dx = xRange.second - xRange.first;
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dy = yRange.second - yRange.first;
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xLabel = _xLabel;
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yLabel = _yLabel;
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pLabel = _pLabel;
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}
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void setDataTransform(float _xM, float _xC, float _yM, float _yC)
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{
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xM = _xM;
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xC = _xC;
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yM = _yM;
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yC = _yC;
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}
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void setDataTransform(float _xM, float _xC)
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{
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xM = _xM;
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xC = _xC;
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yM = 1.f;
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yC = 0.f;
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}
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void resetDataTransform() { xM = yM = 1.f; xC = yC = 0.f; }
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bool drawAxes(bool _x = true, bool _y = true) const;
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void drawLineGraph(std::vector<float> const& _data, QColor _color = QColor(128, 128, 128), QBrush const& _fillToZero = Qt::NoBrush, float _width = 0.f) const;
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void drawLineGraph(std::function<float(float)> const& _f, QColor _color = QColor(128, 128, 128), QBrush const& _fillToZero = Qt::NoBrush, float _width = 0.f) const;
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void ruleX(float _y, QColor _color = QColor(128, 128, 128), float _width = 0.f) const;
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void ruleY(float _x, QColor _color = QColor(128, 128, 128), float _width = 0.f) const;
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void labelYOrderedPoints(std::map<float, float> const& _translatedData, int _maxCount = 20, float _minFactor = .01f) const;
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protected:
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QPainter* p = nullptr;
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QRect active;
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std::pair<float, float> xRange;
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std::pair<float, float> yRange;
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float xM = 0;
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float xC = 0;
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float yM = 0;
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float yC = 0;
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float dx = 0;
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float dy = 0;
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std::function<std::string(float _f)> xLabel;
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std::function<std::string(float _f)> yLabel;
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std::function<std::string(float _x, float _y)> pLabel;
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float fontPixelSize = 0;
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// Translate from raw indexed data into x/y graph units. Only relevant for indexed data.
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float xT(float _dataIndex) const { return _dataIndex * xM + xC; }
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float yT(float _dataValue) const { return _dataValue * yM + yC; }
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// Translate from x/y graph units to widget pixels.
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int xP(float _xUnits) const { return active.left() + (_xUnits - xRange.first) / dx * active.width(); }
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int yP(float _yUnits) const { return active.bottom() - (_yUnits - yRange.first) / dy * active.height(); }
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QPoint P(float _x, float _y) const { return QPoint(xP(_x), yP(_y)); }
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// Translate direcly from raw indexed data to widget pixels.
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int xTP(float _dataIndex) const { return active.left() + (xT(_dataIndex) - xRange.first) / dx * active.width(); }
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int yTP(float _dataValue) const { return active.bottom() - (yT(_dataValue) - yRange.first) / dy * active.height(); }
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// Translate back from pixels into graph units.
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float xU(int _xPixels) const { return float(_xPixels - active.left()) / active.width() * dx + xRange.first; }
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// Translate back from graph units into raw data index.
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float xR(float _xUnits) const { return (_xUnits - xC) / xM; }
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// Translate directly from pixels into raw data index. xRU(xTP(X)) == X
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float xRU(int _xPixels) const { return xR(xU(_xPixels)); }
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};
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}
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