private CarouselBeatmapSet createCarouselSet(BeatmapSetInfo beatmapSet)
{
if (beatmapSet.Beatmaps.All(b => b.Hidden))
{
return(null);
}
// todo: remove the need for this.
foreach (var b in beatmapSet.Beatmaps)
{
if (b.Metadata == null)
{
b.Metadata = beatmapSet.Metadata;
}
}
var set = new CarouselBeatmapSet(beatmapSet);
foreach (var c in set.Beatmaps)
{
c.State.ValueChanged += v =>
{
if (v == CarouselItemState.Selected)
{
selectedBeatmapSet = set;
SelectionChanged?.Invoke(c.Beatmap);
itemsCache.Invalidate();
scrollPositionCache.Invalidate();
}
};
}
return(set);
}
public void UpdateBeatmapSet(BeatmapSetInfo beatmapSet)
{
Schedule(() =>
{
CarouselBeatmapSet existingSet = beatmapSets.FirstOrDefault(b => b.BeatmapSet.ID == beatmapSet.ID);
bool hadSelection = existingSet?.State?.Value == CarouselItemState.Selected;
var newSet = createCarouselSet(beatmapSet);
if (existingSet != null)
{
root.RemoveChild(existingSet);
}
if (newSet == null)
{
itemsCache.Invalidate();
return;
}
root.AddChild(newSet);
applyActiveCriteria(false, false);
//check if we can/need to maintain our current selection.
if (hadSelection)
{
select((CarouselItem)newSet.Beatmaps.FirstOrDefault(b => b.Beatmap.ID == selectedBeatmap?.Beatmap.ID) ?? newSet);
}
itemsCache.Invalidate();
Schedule(() => BeatmapSetsChanged?.Invoke());
});
}
public override void RemoveChild(CarouselItem i)
{
CarouselBeatmapSet set = (CarouselBeatmapSet)i;
BeatmapSetsByID.Remove(set.BeatmapSet.ID);
base.RemoveChild(i);
}
public override void AddChild(CarouselItem i)
{
CarouselBeatmapSet set = (CarouselBeatmapSet)i;
BeatmapSetsByID.Add(set.BeatmapSet.ID, set);
base.AddChild(i);
}
/// <summary>
/// Computes the target Y positions for every item in the carousel.
/// </summary>
/// <returns>The Y position of the currently selected item.</returns>
private void updateItems()
{
Items = root.Drawables.ToList();
yPositions.Clear();
float currentY = DrawHeight / 2;
DrawableCarouselBeatmapSet lastSet = null;
scrollTarget = null;
foreach (DrawableCarouselItem d in Items)
{
if (d.IsPresent)
{
switch (d)
{
case DrawableCarouselBeatmapSet set:
lastSet = set;
set.MoveToX(set.Item.State == CarouselItemState.Selected ? -100 : 0, 500, Easing.OutExpo);
set.MoveToY(currentY, 750, Easing.OutExpo);
break;
case DrawableCarouselBeatmap beatmap:
if (beatmap.Item.State.Value == CarouselItemState.Selected)
{
scrollTarget = currentY + beatmap.DrawHeight / 2 - DrawHeight / 2;
}
void performMove(float y, float?startY = null)
{
if (startY != null)
{
beatmap.MoveTo(new Vector2(0, startY.Value));
}
beatmap.MoveToX(beatmap.Item.State == CarouselItemState.Selected ? -50 : 0, 500, Easing.OutExpo);
beatmap.MoveToY(y, 750, Easing.OutExpo);
}
Debug.Assert(lastSet != null);
float?setY = null;
if (!d.IsLoaded || beatmap.Alpha == 0) // can't use IsPresent due to DrawableCarouselItem override.
// ReSharper disable once PossibleNullReferenceException (resharper broken?)
{
setY = lastSet.Y + lastSet.DrawHeight + 5;
}
if (d.IsLoaded)
{
performMove(currentY, setY);
}
else
{
float y = currentY;
d.OnLoadComplete = _ => performMove(y, setY);
}
break;
}
}
yPositions.Add(currentY);
if (d.Item.Visible)
{
currentY += d.DrawHeight + 5;
}
}
currentY += DrawHeight / 2;
scrollableContent.Height = currentY;
if (initialLoadComplete && (selectedBeatmapSet == null || selectedBeatmap == null || selectedBeatmapSet.State.Value != CarouselItemState.Selected))
{
selectedBeatmapSet = null;
SelectionChanged?.Invoke(null);
}
itemsCache.Validate();
}
