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2eebae13dd
Move most of the QtQuick code to its own directory, so that it can be reused in the future for the chart. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
124 lines
3.9 KiB
C++
124 lines
3.9 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 "chartitem.h"
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#include <memory>
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#include <vector>
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class ChartLineItem;
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class QFontMetrics;
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// The labels and the title of the axis are rendered into a pixmap.
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// The ticks and the baseline are realized as individual ChartLineItems.
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class StatsAxis : public ChartPixmapItem {
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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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std::pair<double, double> minMaxScreen() const; // minimum and maximum in screen coordinates
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std::pair<double, double> horizontalOverhang() const; // space that labels peak out in horizontal axes
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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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std::vector<double> ticksPositions() const; // Positions in screen coordinates
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protected:
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StatsAxis(ChartView &view, const StatsTheme &theme, const QString &title, bool horizontal, bool labelsBetweenTicks);
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const StatsTheme &theme; // Initialized once in constructor.
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ChartItemPtr<ChartLineItem> line;
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QString title;
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double titleWidth;
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struct Label {
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QString label;
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int width;
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double pos;
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};
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std::vector<Label> labels;
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void addLabel(const QFontMetrics &fm, const QString &label, double pos);
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virtual void updateLabels() = 0;
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virtual std::pair<QString, QString> getFirstLastLabel() const = 0;
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struct Tick {
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ChartItemPtr<ChartLineItem> item;
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double pos;
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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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double size; // width for horizontal, height for vertical
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double zeroOnScreen;
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QPointF offset; // Offset of the label and title pixmap with respect to the (0,0) position.
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double min, max;
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double labelWidth; // Maximum width of labels
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private:
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double titleSpace() const; // Space needed for title
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};
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class ValueAxis : public StatsAxis {
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public:
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ValueAxis(ChartView &view, const StatsTheme &theme, const QString &title,
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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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std::pair<QString, QString> getFirstLastLabel() const override;
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};
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class CountAxis : public ValueAxis {
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public:
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CountAxis(ChartView &view, const StatsTheme &theme, const QString &title, 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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std::pair<QString, QString> getFirstLastLabel() const override;
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};
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class CategoryAxis : public StatsAxis {
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public:
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CategoryAxis(ChartView &view, const StatsTheme &theme, const QString &title,
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const std::vector<QString> &labels, bool horizontal);
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private:
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std::vector<QString> labelsText;
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void updateLabels();
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std::pair<QString, QString> getFirstLastLabel() const override;
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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(ChartView &view, const StatsTheme &theme, const QString &title,
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std::vector<HistogramAxisEntry> bin_values, bool horizontal);
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private:
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void updateLabels() override;
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std::pair<QString, QString> getFirstLastLabel() const 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(ChartView &view, const StatsTheme &theme, const QString &title, double from, double to, bool horizontal);
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};
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#endif
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