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4ab9f1c6b0
Replace by custom implementation, with the ultimate goal to remove the QtCharts module. This doesn't yet display axis titles or a grid. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at> Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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#ifndef STATS_AXIS_H
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#define STATS_AXIS_H
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#include <memory>
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#include <vector>
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#include <QBarCategoryAxis>
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#include <QCategoryAxis>
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#include <QFont>
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#include <QGraphicsSimpleTextItem>
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#include <QGraphicsLineItem>
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#include <QValueAxis>
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namespace QtCharts {
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class QChart;
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}
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class StatsAxis : QGraphicsLineItem {
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public:
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virtual ~StatsAxis();
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// Returns minimum and maximum of shown range, not of data points.
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std::pair<double, double> minMax() const;
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double width() const; // Only supported by vertical axes. Only valid after setSize().
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double height() const; // Only supported for horizontal axes. Always valid.
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void setSize(double size); // Width for horizontal and height for vertical.
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void setPos(QPointF pos); // Must be called after setSize().
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void setRange(double, double);
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// Map x (horizontal) or y (vertical) coordinate to or from screen coordinate
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double toScreen(double) const;
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double toValue(double) const;
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protected:
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StatsAxis(QtCharts::QChart *chart, bool horizontal, bool labelsBetweenTicks);
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QtCharts::QChart *chart;
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struct Label {
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std::unique_ptr<QGraphicsSimpleTextItem> label;
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double pos;
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Label(const QString &name, double pos, QtCharts::QChart *chart, const QFont &font);
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};
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std::vector<Label> labels;
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void addLabel(const QString &label, double pos);
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virtual void updateLabels() = 0;
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struct Tick {
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std::unique_ptr<QGraphicsLineItem> item;
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double pos;
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Tick(double pos, QtCharts::QChart *chart);
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};
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std::vector<Tick> ticks;
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void addTick(double pos);
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int guessNumTicks(const std::vector<QString> &strings) const;
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bool horizontal;
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bool labelsBetweenTicks; // When labels are between ticks, they can be moved closer to the axis
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QFont labelFont, titleFont;
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double size; // width for horizontal, height for vertical
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double zeroOnScreen;
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double min, max;
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};
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class ValueAxis : public StatsAxis {
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public:
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ValueAxis(QtCharts::QChart *chart, double min, double max, int decimals, bool horizontal);
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private:
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double min, max;
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int decimals;
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void updateLabels() override;
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};
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class CountAxis : public ValueAxis {
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public:
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CountAxis(QtCharts::QChart *chart, int count, bool horizontal);
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private:
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int count;
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void updateLabels() override;
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};
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class CategoryAxis : public StatsAxis {
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public:
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CategoryAxis(QtCharts::QChart *chart, const std::vector<QString> &labels, bool horizontal);
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private:
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void updateLabels();
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};
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struct HistogramAxisEntry {
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QString name;
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double value;
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bool recommended;
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};
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class HistogramAxis : public StatsAxis {
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public:
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HistogramAxis(QtCharts::QChart *chart, std::vector<HistogramAxisEntry> bin_values, bool horizontal);
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private:
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void updateLabels() override;
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std::vector<HistogramAxisEntry> bin_values;
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int preferred_step;
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};
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class DateAxis : public HistogramAxis {
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public:
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DateAxis(QtCharts::QChart *chart, double from, double to, bool horizontal);
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};
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#endif
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