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// SPDX-License-Identifier: GPL-2.0
// A pie chart series, which displays percentual information.
#ifndef PIE_SERIES_H
#define PIE_SERIES_H
#include "statsseries.h"
#include <memory>
#include <vector>
#include <QString>
class InformationBox;
class QGraphicsEllipseItem;
class QGraphicsSimpleTextItem;
class PieSeries : public StatsSeries {
public:
// The pie series is initialized with (name, count) pairs.
// If keepOrder is false, bins will be sorted by size, otherwise the sorting
// of the shown bins will be retained. Small bins are omitted for clarity.
PieSeries(QtCharts::QChart *chart, StatsAxis *xAxis, StatsAxis *yAxis, const QString &categoryName,
const std::vector<std::pair<QString, int>> &data, bool keepOrder, bool labels);
~PieSeries();
void updatePositions() override;
bool hover(QPointF pos) override;
void unhighlight() override;
std::vector<QString> binNames();
private:
// Get item under mouse pointer, or -1 if none
int getItemUnderMouse(const QPointF &f) const;
QString categoryName;
std::vector<QString> makeInfo(int idx) const;
struct Item {
std::unique_ptr<QGraphicsEllipseItem> item;
std::unique_ptr<QGraphicsSimpleTextItem> innerLabel, outerLabel;
QString name;
double angleTo; // In fraction of total
int count;
QPointF innerLabelPos, outerLabelPos; // With respect to a (-1, -1)-(1, 1) rectangle.
Item(QtCharts::QChart *chart, const QString &name, int from, int count, int totalCount,
int bin_nr, int numBins, bool labels);
void updatePositions(const QRectF &rect, const QPointF ¢er, double radius);
void highlight(int bin_nr, bool highlight, int numBins);
};
std::vector<Item> items;
int totalCount;
// Entries in the "other" group. If empty, there is no "other" group.
struct OtherItem {
QString name;
int count;
};
std::vector<OtherItem> other;
std::unique_ptr<InformationBox> information;
QPointF center; // center of drawing area
double radius; // radius of pie
int highlighted;
};
#endif
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