You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 

116 lines
4.2 KiB

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