pinned_rows_model.h

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#ifndef PINNED_ROWS_MODEL_H
#define PINNED_ROWS_MODEL_H
 
#include <QAbstractProxyModel>
#include <QList>
 
class PacketListModel;

class PinnedRowsModel : public QAbstractProxyModel
{
    Q_OBJECT
public:
    static const int kMaxPinnedRows = 10;
 
    explicit PinnedRowsModel(QObject *parent = nullptr);

    bool pinFrame(int frame_num);

    void unpinFrame(int frame_num);
 
    // Unpins every currently pinned packet.
    void clear();
 
    // Whether the given frame number is currently pinned.
    bool isPinned(int frame_num) const;
 
    // The number of currently pinned frames.
    int pinnedCount() const { return static_cast<int>(pinned_frame_nums_.count()); }

    void refresh();
 
    // QAbstractProxyModel
    void setSourceModel(QAbstractItemModel *source_model) override;
    QModelIndex mapToSource(const QModelIndex &proxy_index) const override;
    QModelIndex mapFromSource(const QModelIndex &source_index) const override;
    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
    QModelIndex parent(const QModelIndex &child) const override;
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;

    QVariant data(const QModelIndex &proxy_index, int role) const override;

    Qt::ItemFlags flags(const QModelIndex &proxy_index) const override;
 
private slots:
    void sourceDataChanged(const QModelIndex &source_top_left, const QModelIndex &source_bottom_right,
                           const QList<int> &roles);
 
private:
    QList<int> pinned_frame_nums_;
    PacketListModel *packet_list_model_;

    int sourceRowForPinnedIndex(int proxy_row) const;
};
 
#endif // PINNED_ROWS_MODEL_H