File LegendModel.hpp¶

File List > legend > LegendModel.hpp
//
// SPDX-FileCopyrightText: 2026 Michal Grabarczyk
// SPDX-License-Identifier: GPL-3.0-only WITH Universal-FOSS-exception-1.0
//
// This file is also available under a separate commercial license.
// See COMMERCIAL-LICENSING.md for contact information.
//
#pragma once

#include "QAccelPlot/series/PlotSeries.hpp"

#include <QAbstractListModel>
#include <QList>
#include <QPointer>

namespace QAccelPlot {

class LegendModel : public QAbstractListModel {
    Q_OBJECT
    QML_NAMED_ELEMENT(LegendModel)


    Q_PROPERTY(QList<PlotSeries*> series READ series WRITE setSeries NOTIFY seriesChanged)
    Q_PROPERTY(int count READ count NOTIFY countChanged)

public:
    enum Role {
        SeriesRole = Qt::UserRole + 1,
        NameRole,
        EntryRole,
    };

    explicit LegendModel(QObject* parent = nullptr);

    QList<PlotSeries*> series() const;
    void setSeries(const QList<PlotSeries*>& series);

    int count() const;

    int rowCount(const QModelIndex& parent = {}) const override;
    QVariant data(const QModelIndex& index, int role) const override;
    QHash<int, QByteArray> roleNames() const override;

signals:
    void seriesChanged();
    void countChanged();

private:
    void watchSeries(PlotSeries* series) const;
    void unwatchSeries(PlotSeries* series);
    void onSeriesDestroyed();
    void refreshRows();

    // One legend row: entry \c entry of \c series' legendEntries().
    struct Row {
        QPointer<PlotSeries> series;
        int entry{0};

        bool operator==(const Row& other) const;
    };

    QList<QPointer<PlotSeries>> series_;
    QList<Row> rows_;
};

} // namespace QAccelPlot