File indexing completed on 2024-04-28 03:56:45

 /*
  * This file is part of KQuickCharts
  * SPDX-FileCopyrightText: 2019 Arjen Hiemstra <ahiemstra@heimr.nl>
  *
  * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
  */
 
 #ifndef LEGENDMODEL_H
 #define LEGENDMODEL_H
 
 #include <vector>
 
 #include <QAbstractListModel>
 #include <QColor>
 #include <qqmlregistration.h>
 
 class Chart;
 class ChartDataSource;
 
 struct LegendItem {
     QString name;
     QString shortName;
     QColor color;
     QVariant value;
 };
 
 /**
  * A model that extracts information from a chart that can be displayed as a legend.
  */
 class LegendModel : public QAbstractListModel
 {
     Q_OBJECT
     QML_ELEMENT
 
 public:
     enum Roles { NameRole = Qt::UserRole, ShortNameRole, ColorRole, ValueRole };
 
     enum SourceIndex { UseSourceCount = -2 };
     Q_ENUM(SourceIndex)
 
     explicit LegendModel(QObject *parent = nullptr);
 
     Q_PROPERTY(Chart *chart READ chart WRITE setChart NOTIFY chartChanged)
     Chart *chart() const;
     void setChart(Chart *newChart);
     Q_SIGNAL void chartChanged();
 
     Q_PROPERTY(int sourceIndex READ sourceIndex WRITE setSourceIndex NOTIFY sourceIndexChanged)
     int sourceIndex() const;
     void setSourceIndex(int index);
     Q_SIGNAL void sourceIndexChanged();
 
     QHash<int, QByteArray> roleNames() const override;
     int rowCount(const QModelIndex &parent) const override;
     QVariant data(const QModelIndex &index, int role) const override;
 
 private:
     void queueUpdate();
     void queueDataChange();
     void update();
     void updateData();
     int countItems();
     QVariant getValueForItem(int item);
 
     Chart *m_chart = nullptr;
     int m_sourceIndex = UseSourceCount;
     bool m_updateQueued = false;
     bool m_dataChangeQueued = false;
     std::vector<QMetaObject::Connection> m_connections;
     std::vector<LegendItem> m_items;
 };
 
 #endif // LEGENDMODEL_H