private void Rec_PanUpdated(object sender, PanUpdatedEventArgs e)
{
if (DisableTouchScroll)
{
return;
}
if (Config == null)
{
return;
}
var currentId = e.GestureId;
if (!(m_lastId == SlideProperties.HoldId || !SlideProperties.IsHeld || currentId == m_lastId))
{
return;
}
if (e.StatusType == GestureStatus.Started)
{
// Start tracking time
m_startSlideLocation = CalculateDist(SlideProperties.Position);
}
var currentPos = m_startSlideLocation - e.TotalX;
m_lastId = currentId;
var index = Math.Max(Config.MinValue - 0.45, Math.Min(Config.MaxValue + 0.45, CalculateIndex(currentPos)));
if (e.StatusType == GestureStatus.Completed || e.StatusType == GestureStatus.Canceled)
{
index = SlideProperties.Position;
m_accelerator.OnDrag(index);
SlideProperties = new SlidableProperties(index, m_lastId, e.StatusType != GestureStatus.Completed && e.StatusType != GestureStatus.Canceled);
}
else
{
SlideProperties = new SlidableProperties(index, m_lastId, e.StatusType != GestureStatus.Completed && e.StatusType != GestureStatus.Canceled);
OnScrolledInternal();
}
if (e.StatusType == GestureStatus.Completed || e.StatusType == GestureStatus.Canceled)
{
m_accelerator.EndDrag();
Device.StartTimer(TimeSpan.FromMilliseconds(20), () => // ~40 fps
{
if (currentId != SlideProperties.HoldId)
{
return(false);
}
m_accelerator.Min = Config.MinValue - 0.45;
m_accelerator.Max = Config.MaxValue + 0.45;
var next = m_accelerator.GetValue(out bool isDone);
index = next;
if (SlideProperties.IsHeld)
{
return(false);
}
SlideProperties = new SlidableProperties(index, m_lastId, false);
OnScrolledInternal();
return(!isDone);
});
}
else if (e.StatusType == GestureStatus.Started)
{
m_accelerator.StartDrag(index);
}
else
{
m_accelerator.OnDrag(index);
}
}
/// <summary>
/// Scrolls to the index
/// </summary>
/// <param name="index">Index to scroll to</param>
/// <param name="length">Time used on the scrolling</param>
public void ScrollTo(int index, int length = 250)
{
SlidableProperties.ScrollTo(s => SlideProperties = s, () => SlideProperties, index, length);
}