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259 lines
9.7 KiB
C#
259 lines
9.7 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using osu.Framework.Allocation;
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using osu.Framework.Extensions.IEnumerableExtensions;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.Containers;
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using osu.Framework.Graphics.Shapes;
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using osu.Framework.Graphics.Sprites;
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using osu.Framework.Graphics.Textures;
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using osu.Framework.Input.Events;
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using osu.Game.Audio;
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using osu.Game.Beatmaps;
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using osu.Game.Graphics.Containers;
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using osu.Game.Graphics.Sprites;
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using osu.Game.Graphics.UserInterface;
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using osu.Game.Overlays.BeatmapListing;
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using osu.Game.Overlays.BeatmapListing.Panels;
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using osuTK;
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namespace osu.Game.Overlays
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{
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public class BeatmapListingOverlay : FullscreenOverlay<BeatmapListingHeader>
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{
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[Resolved]
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private PreviewTrackManager previewTrackManager { get; set; }
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private Drawable currentContent;
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private LoadingLayer loadingLayer;
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private Container panelTarget;
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private FillFlowContainer<BeatmapPanel> foundContent;
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private NotFoundDrawable notFoundContent;
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private OverlayScrollContainer resultScrollContainer;
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public BeatmapListingOverlay()
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: base(OverlayColourScheme.Blue, new BeatmapListingHeader())
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{
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}
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private BeatmapListingFilterControl filterControl;
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[BackgroundDependencyLoader]
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private void load()
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{
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Children = new Drawable[]
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{
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new Box
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{
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RelativeSizeAxes = Axes.Both,
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Colour = ColourProvider.Background6
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},
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resultScrollContainer = new OverlayScrollContainer
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{
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RelativeSizeAxes = Axes.Both,
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ScrollbarVisible = false,
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Child = new ReverseChildIDFillFlowContainer<Drawable>
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{
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AutoSizeAxes = Axes.Y,
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RelativeSizeAxes = Axes.X,
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Direction = FillDirection.Vertical,
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Children = new Drawable[]
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{
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Header,
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filterControl = new BeatmapListingFilterControl
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{
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SearchStarted = onSearchStarted,
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SearchFinished = onSearchFinished,
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},
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new Container
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{
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AutoSizeAxes = Axes.Y,
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RelativeSizeAxes = Axes.X,
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Children = new Drawable[]
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{
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new Box
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{
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RelativeSizeAxes = Axes.Both,
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Colour = ColourProvider.Background4,
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},
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panelTarget = new Container
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{
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AutoSizeAxes = Axes.Y,
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RelativeSizeAxes = Axes.X,
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Padding = new MarginPadding { Horizontal = 20 },
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Children = new Drawable[]
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{
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foundContent = new FillFlowContainer<BeatmapPanel>(),
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notFoundContent = new NotFoundDrawable(),
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loadingLayer = new LoadingLayer(panelTarget)
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}
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}
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}
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},
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}
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}
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}
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};
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}
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protected override void OnFocus(FocusEvent e)
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{
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base.OnFocus(e);
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filterControl.TakeFocus();
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}
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private CancellationTokenSource cancellationToken;
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private void onSearchStarted()
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{
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cancellationToken?.Cancel();
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previewTrackManager.StopAnyPlaying(this);
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if (panelTarget.Any())
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loadingLayer.Show();
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}
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private Task panelLoadDelegate;
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private void onSearchFinished(List<BeatmapSetInfo> beatmaps)
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{
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var newPanels = beatmaps.Select<BeatmapSetInfo, BeatmapPanel>(b => new GridBeatmapPanel(b)
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{
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Anchor = Anchor.TopCentre,
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Origin = Anchor.TopCentre,
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});
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if (filterControl.CurrentPage == 0)
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{
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//No matches case
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if (!newPanels.Any())
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{
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LoadComponentAsync(notFoundContent, addContentToPlaceholder, (cancellationToken = new CancellationTokenSource()).Token);
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return;
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}
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// spawn new children with the contained so we only clear old content at the last moment.
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var content = new FillFlowContainer<BeatmapPanel>
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{
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RelativeSizeAxes = Axes.X,
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AutoSizeAxes = Axes.Y,
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Spacing = new Vector2(10),
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Alpha = 0,
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Margin = new MarginPadding { Vertical = 15 },
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ChildrenEnumerable = newPanels
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};
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panelLoadDelegate = LoadComponentAsync(foundContent = content, addContentToPlaceholder, (cancellationToken = new CancellationTokenSource()).Token);
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}
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else
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{
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panelLoadDelegate = LoadComponentsAsync(newPanels, loaded =>
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{
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lastFetchDisplayedTime = Time.Current;
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foundContent.AddRange(loaded);
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loaded.ForEach(p => p.FadeIn(200, Easing.OutQuint));
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});
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}
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}
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private void addContentToPlaceholder(Drawable content)
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{
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loadingLayer.Hide();
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lastFetchDisplayedTime = Time.Current;
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var lastContent = currentContent;
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if (lastContent != null)
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{
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lastContent.FadeOut(100, Easing.OutQuint).Expire();
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// Consider the case when the new content is smaller than the last content.
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// If the auto-size computation is delayed until fade out completes, the background remain high for too long making the resulting transition to the smaller height look weird.
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// At the same time, if the last content's height is bypassed immediately, there is a period where the new content is at Alpha = 0 when the auto-sized height will be 0.
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// To resolve both of these issues, the bypass is delayed until a point when the content transitions (fade-in and fade-out) overlap and it looks good to do so.
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lastContent.Delay(25).Schedule(() => lastContent.BypassAutoSizeAxes = Axes.Y).Then().Schedule(() => panelTarget.Remove(lastContent));
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}
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if (!content.IsAlive)
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panelTarget.Add(content);
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content.FadeIn(200, Easing.OutQuint);
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currentContent = content;
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}
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protected override void Dispose(bool isDisposing)
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{
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cancellationToken?.Cancel();
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base.Dispose(isDisposing);
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}
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private class NotFoundDrawable : CompositeDrawable
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{
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public NotFoundDrawable()
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{
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RelativeSizeAxes = Axes.X;
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Height = 250;
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Alpha = 0;
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Margin = new MarginPadding { Top = 15 };
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}
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[BackgroundDependencyLoader]
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private void load(TextureStore textures)
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{
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AddInternal(new FillFlowContainer
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{
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Anchor = Anchor.Centre,
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Origin = Anchor.Centre,
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RelativeSizeAxes = Axes.Y,
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AutoSizeAxes = Axes.X,
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Direction = FillDirection.Horizontal,
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Spacing = new Vector2(10, 0),
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Children = new Drawable[]
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{
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new Sprite
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{
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Anchor = Anchor.Centre,
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Origin = Anchor.Centre,
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RelativeSizeAxes = Axes.Both,
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FillMode = FillMode.Fit,
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Texture = textures.Get(@"Online/not-found")
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},
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new OsuSpriteText
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{
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Anchor = Anchor.Centre,
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Origin = Anchor.Centre,
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Text = @"... nope, nothing found.",
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}
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}
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});
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}
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}
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private const double time_between_fetches = 500;
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private double lastFetchDisplayedTime;
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protected override void Update()
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{
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base.Update();
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const int pagination_scroll_distance = 500;
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bool shouldShowMore = panelLoadDelegate?.IsCompleted != false
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&& Time.Current - lastFetchDisplayedTime > time_between_fetches
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&& (resultScrollContainer.ScrollableExtent > 0 && resultScrollContainer.IsScrolledToEnd(pagination_scroll_distance));
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if (shouldShowMore)
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filterControl.FetchNextPage();
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}
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}
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}
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