OnGesture.cs

internal void OnGesture(PanUpdatedEventArgs e)
{
    switch (e.StatusType)
    {
        case GestureStatus.Running:
            if (e.TotalX < 0 && Math.Abs(e.TotalX) > Math.Abs(e.TotalY))
            {
                var timeDiff = Convert.ToInt64(e.TotalX * 1000);
                _finalTime = MediaPlayer.Time + timeDiff;

                if (WillOverflow)
                    break;

                Message = FormatSeekingMessage(timeDiff, _finalTime, Direction.Left);
                _timeChanged = true;
            }
            else if (e.TotalX > 0 && Math.Abs(e.TotalX) > Math.Abs(e.TotalY))
            {
                var timeDiff = Convert.ToInt64(e.TotalX * 1000);
                _finalTime = MediaPlayer.Time + timeDiff;

                if (WillOverflow)
                    break;

                Message = FormatSeekingMessage(timeDiff, _finalTime, Direction.Right);
                _timeChanged = true;
            }
            else if (e.TotalY < 0 && Math.Abs(e.TotalY) > Math.Abs(e.TotalX))
            {
                var volume = (int)(MediaPlayer.Volume + e.TotalY * -1);
                _finalVolume = VolumeRangeCheck(volume);

                Message = FormatVolumeMessage(_finalVolume, Direction.Top);
                _volumeChanged = true;
            }
            else if (e.TotalY > 0 && e.TotalY > Math.Abs(e.TotalX))
            {
                var volume = (int)(MediaPlayer.Volume + e.TotalY * -1);
                _finalVolume = VolumeRangeCheck(volume);

                Message = FormatVolumeMessage(_finalVolume, Direction.Bottom);
                _volumeChanged = true;
            }
            break;
        case GestureStatus.Started:
        case GestureStatus.Canceled:
            Message = string.Empty;
            break;
        case GestureStatus.Completed:
            if (_timeChanged)
                MediaPlayer.Time = _finalTime;
            if (_volumeChanged && MediaPlayer.Volume != _finalVolume)
                MediaPlayer.Volume = _finalVolume;

            Message = string.Empty;
            _timeChanged = false;
            _volumeChanged = false;
            break;
    }
}