pinned_rows_model.h

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

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

    void setSortModel(PacketListProxyModel *sort_model);

    void setBaseFont(const QFont &font);

    bool pinFrame(int frame_num);

    void unpinFrame(int frame_num);
 
    // Unpins every currently pinned packet.
    void clear();

    bool restoreSavedPins();
 
    // Forgets the pins saved by the last source model reset, e.g., because
    // the capture file was closed or replaced rather than redissected.
    void discardSavedPins() { saved_frame_nums_.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()); }

    int rowForFrameNum(int frame_num) const { return static_cast<int>(pinned_frame_nums_.indexOf(frame_num)); }

    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;
    bool hasChildren(const QModelIndex &parent = QModelIndex()) const override;
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
 
private slots:
    void sourceDataChanged(const QModelIndex &source_top_left, const QModelIndex &source_bottom_right,
                           const QList<int> &roles);
 
    void sourceModelAboutToBeReset();
    void sourceModelReset();
 
private:
    QList<int> pinned_frame_nums_;
    // Pins held across a source model reset, for restoreSavedPins().
    QList<int> saved_frame_nums_;
    PacketListModel *packet_list_model_;
    PacketListProxyModel *sort_model_;
    QFont base_font_;
};
 
#endif // PINNED_ROWS_MODEL_H