replay_timeline_widget.h

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#ifndef REPLAY_TIMELINE_WIDGET
#define REPLAY_TIMELINE_WIDGET
 
#include "../../../game/player/event_processing_options.h"
 
#include <QMouseEvent>
#include <QWidget>
 
class QPaintEvent;
class QTimer;
 
class ReplayTimelineWidget : public QWidget
{
    Q_OBJECT
signals:
    void processNextEvent(EventProcessingOptions options);
    void replayFinished();
    void rewound();
 
private:
    enum PlaybackMode
    {
        NORMAL_PLAYBACK,
        FORWARD_SKIP,
        BACKWARD_SKIP
    };
 
    static constexpr int TIMER_INTERVAL_MS = 200;
    static constexpr int BIN_LENGTH = 5000;
 
    QTimer *replayTimer;
    QTimer *rewindBufferingTimer;
    QList<int> replayTimeline;
    QList<int> histogram;
    int maxBinValue, maxTime;
    qreal timeScaleFactor;
    int currentVisualTime;    // time currently displayed by the timeline
    int currentProcessedTime; // time that events are currently processed up to. Could differ from visual time due to
                              // rewind buffering
    int currentEvent;
 
    void skipToTime(int newTime, bool doRewindBuffering);
    void handleBackwardsSkip(bool doRewindBuffering);
    void processRewind();
    void processNewEvents(PlaybackMode playbackMode);
private slots:
    void replayTimerTimeout();
 
public:
    static constexpr int SMALL_SKIP_MS = 1000;
    static constexpr int BIG_SKIP_MS = 10000;
    static constexpr qreal FAST_FORWARD_SCALE_FACTOR = 10.0;
 
    explicit ReplayTimelineWidget(QWidget *parent = nullptr);
    void setTimeline(const QList<int> &_replayTimeline);
    [[nodiscard]] QSize sizeHint() const override;
    [[nodiscard]] QSize minimumSizeHint() const override;
    void setTimeScaleFactor(qreal _timeScaleFactor);
    [[nodiscard]] int getCurrentEvent() const
    {
        return currentEvent;
    }
public slots:
    void startReplay();
    void stopReplay();
    void skipByAmount(int amount); // use a negative amount to skip backwards
 
protected:
    void paintEvent(QPaintEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
};
 
#endif