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Merge pull request #2332 from LittleEndu/alt-eagerselect

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Make beatmap carousel select a random beatmap when there was no previous selection
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Dean Herbert 2018-04-13 18:11:45 +09:00 committed by GitHub
commit 5f020074e0
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 64 additions and 7 deletions
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30
osu.Game.Tests/Visual/TestCaseBeatmapCarousel.cs
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@ -42,6 +42,7 @@ namespace osu.Game.Tests.Visual
private readonly Stack<BeatmapSetInfo> selectedSets = new Stack<BeatmapSetInfo>();
private readonly HashSet<int> eagerSelectedIDs = new HashSet<int>();
private BeatmapInfo currentSelection;
@ -80,6 +81,7 @@ namespace osu.Game.Tests.Visual
testEmptyTraversal();
testHiding();
testSelectingFilteredRuleset();
testCarouselRootIsRandom();
}
private void ensureRandomFetchSuccess() =>
@ -151,6 +153,17 @@ namespace osu.Game.Tests.Visual
AddAssert("Selection is visible", selectedBeatmapVisible);
}
private void checkNonmatchingFilter()
{
AddStep("Toggle non-matching filter", () =>
{
carousel.Filter(new FilterCriteria { SearchText = "Dingo" }, false);
carousel.Filter(new FilterCriteria(), false);
eagerSelectedIDs.Add(carousel.SelectedBeatmapSet.ID);
}
);
}
/// <summary>
/// Test keyboard traversal
/// </summary>
@ -403,6 +416,23 @@ namespace osu.Game.Tests.Visual
AddStep("remove single ruleset set", () => carousel.RemoveBeatmapSet(testSingle));
}
private void testCarouselRootIsRandom()
{
List<BeatmapSetInfo> beatmapSets = new List<BeatmapSetInfo>();
for (int i = 1; i <= 50; i++)
beatmapSets.Add(createTestBeatmapSet(i));
AddStep("Load 50 Beatmaps", () => { carousel.BeatmapSets = beatmapSets; });
advanceSelection(direction: 1, diff: false);
checkNonmatchingFilter();
checkNonmatchingFilter();
checkNonmatchingFilter();
checkNonmatchingFilter();
checkNonmatchingFilter();
AddAssert("Selection was random", () => eagerSelectedIDs.Count > 1);
}
private BeatmapSetInfo createTestBeatmapSet(int id)
{
return new BeatmapSetInfo

23
osu.Game/Screens/Select/BeatmapCarousel.cs
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@ -66,7 +66,7 @@ namespace osu.Game.Screens.Select
get { return beatmapSets.Select(g => g.BeatmapSet); }
set
{
CarouselGroup newRoot = new CarouselGroupEagerSelect();
CarouselRoot newRoot = new CarouselRoot(this);
Task.Run(() =>
{
@ -102,10 +102,11 @@ namespace osu.Game.Screens.Select
private readonly Stack<CarouselBeatmap> randomSelectedBeatmaps = new Stack<CarouselBeatmap>();
protected List<DrawableCarouselItem> Items = new List<DrawableCarouselItem>();
private CarouselGroup root = new CarouselGroupEagerSelect();
private CarouselRoot root;
public BeatmapCarousel()
{
root = new CarouselRoot(this);
Child = new OsuContextMenuContainer
{
RelativeSizeAxes = Axes.X,
@ -627,5 +628,23 @@ namespace osu.Game.Screens.Select
// layer transformations on top, with a similar reasoning to the previous comment.
p.SetMultiplicativeAlpha(MathHelper.Clamp(1.75f - 1.5f * dist, 0, 1));
}
private class CarouselRoot : CarouselGroupEagerSelect
{
private readonly BeatmapCarousel carousel;
public CarouselRoot(BeatmapCarousel carousel)
{
this.carousel = carousel;
}
protected override void PerformSelection()
{
if (LastSelected == null)
carousel.SelectNextRandom();
else
base.PerformSelection();
}
}
}
}

18
osu.Game/Screens/Select/Carousel/CarouselGroupEagerSelect.cs
View File

@ -20,13 +20,16 @@ namespace osu.Game.Screens.Select.Carousel
};
}
/// <summary>
/// The last selected item.
/// </summary>
protected CarouselItem LastSelected { get; private set; }
/// <summary>
/// We need to keep track of the index for cases where the selection is removed but we want to select a new item based on its old location.
/// </summary>
private int lastSelectedIndex;
private CarouselItem lastSelected;
/// <summary>
/// To avoid overhead during filter operations, we don't attempt any selections until after all
/// children have been filtered. This bool will be true during the base <see cref="Filter(FilterCriteria)"/>
@ -47,7 +50,7 @@ namespace osu.Game.Screens.Select.Carousel
{
base.RemoveChild(i);
if (i != lastSelected)
if (i != LastSelected)
updateSelectedIndex();
}
@ -83,6 +86,11 @@ namespace osu.Game.Screens.Select.Carousel
// we only perform eager selection if none of our children are in a selected state already.
if (Children.Any(i => i.State == CarouselItemState.Selected)) return;
PerformSelection();
}
protected virtual void PerformSelection()
{
CarouselItem nextToSelect =
Children.Skip(lastSelectedIndex).FirstOrDefault(i => !i.Filtered) ??
Children.Reverse().Skip(InternalChildren.Count - lastSelectedIndex).FirstOrDefault(i => !i.Filtered);
@ -95,10 +103,10 @@ namespace osu.Game.Screens.Select.Carousel
private void updateSelected(CarouselItem newSelection)
{
lastSelected = newSelection;
LastSelected = newSelection;
updateSelectedIndex();
}
private void updateSelectedIndex() => lastSelectedIndex = lastSelected == null ? 0 : Math.Max(0, InternalChildren.IndexOf(lastSelected));
private void updateSelectedIndex() => lastSelectedIndex = LastSelected == null ? 0 : Math.Max(0, InternalChildren.IndexOf(LastSelected));
}
}