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// SPDX-License-Identifier: GPL-2.0
// Supported chart axes
#ifndef STATS_AXIS_H
#define STATS_AXIS_H
#include <vector>
#include <QBarCategoryAxis>
#include <QCategoryAxis>
#include <QValueAxis>
namespace QtCharts {
class QChart;
}
class StatsAxis {
public:
virtual ~StatsAxis();
virtual void updateLabels(const QtCharts::QChart *chart) = 0;
virtual QtCharts::QAbstractAxis *qaxis() = 0;
// Returns minimum and maximum of shown range, not of data points.
virtual std::pair<double, double> minMax() const;
protected:
StatsAxis(bool horizontal);
int guessNumTicks(const QtCharts::QChart *chart, const QtCharts::QAbstractAxis *axis, const std::vector<QString> &strings) const;
bool horizontal;
};
// Small template that derives from a QChart-axis and defines
// the corresponding virtual axis() accessor.
template<typename QAxis>
class StatsAxisTemplate : public StatsAxis, public QAxis
{
using StatsAxis::StatsAxis;
QtCharts::QAbstractAxis *qaxis() override final {
return this;
}
};
class ValueAxis : public StatsAxisTemplate<QtCharts::QValueAxis> {
public:
ValueAxis(double min, double max, int decimals, bool horizontal);
private:
double min, max;
int decimals;
void updateLabels(const QtCharts::QChart *chart) override;
std::pair<double, double> minMax() const override;
};
class CountAxis : public ValueAxis {
public:
CountAxis(int count, bool horizontal);
private:
int count;
void updateLabels(const QtCharts::QChart *chart) override;
};
class CategoryAxis : public StatsAxisTemplate<QtCharts::QBarCategoryAxis> {
public:
CategoryAxis(const std::vector<QString> &labels, bool horizontal);
private:
void updateLabels(const QtCharts::QChart *chart);
};
struct HistogramAxisEntry {
QString name;
double value;
bool recommended;
};
class HistogramAxis : public StatsAxisTemplate<QtCharts::QCategoryAxis> {
public:
HistogramAxis(std::vector<HistogramAxisEntry> bin_values, bool horizontal);
private:
void updateLabels(const QtCharts::QChart *chart) override;
std::pair<double, double> minMax() const override;
std::vector<HistogramAxisEntry> bin_values;
int preferred_step;
};
class DateAxis : public HistogramAxis {
public:
DateAxis(double from, double to, bool horizontal);
};
#endif
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