mirror of
https://github.com/ppy/osu
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140 lines
4.0 KiB
C#
140 lines
4.0 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.Threading;
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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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.Game.Graphics.UserInterface;
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using osu.Game.Overlays.News;
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using osu.Game.Overlays.News.Displays;
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namespace osu.Game.Overlays
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{
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public class NewsOverlay : FullscreenOverlay<NewsHeader>
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{
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private readonly Bindable<string> article = new Bindable<string>(null);
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private Container content;
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private LoadingLayer loading;
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private OverlayScrollContainer scrollFlow;
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public NewsOverlay()
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: base(OverlayColourScheme.Purple, new NewsHeader())
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{
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}
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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.Background5,
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},
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scrollFlow = 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 FillFlowContainer
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{
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RelativeSizeAxes = Axes.X,
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AutoSizeAxes = Axes.Y,
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Direction = FillDirection.Vertical,
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Children = new Drawable[]
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{
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Header.With(h =>
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{
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h.ShowFrontPage = ShowFrontPage;
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}),
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content = new Container
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{
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RelativeSizeAxes = Axes.X,
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AutoSizeAxes = Axes.Y,
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}
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},
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},
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},
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loading = new LoadingLayer(content),
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};
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}
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protected override void LoadComplete()
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{
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base.LoadComplete();
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// should not be run until first pop-in to avoid requesting data before user views.
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article.BindValueChanged(onArticleChanged);
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}
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private bool displayUpdateRequired = true;
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protected override void PopIn()
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{
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base.PopIn();
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if (displayUpdateRequired)
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{
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article.TriggerChange();
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displayUpdateRequired = false;
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}
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}
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protected override void PopOutComplete()
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{
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base.PopOutComplete();
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displayUpdateRequired = true;
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}
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public void ShowFrontPage()
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{
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article.Value = null;
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Show();
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}
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public void ShowArticle(string slug)
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{
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article.Value = slug;
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Show();
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}
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private CancellationTokenSource cancellationToken;
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private void onArticleChanged(ValueChangedEvent<string> e)
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{
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cancellationToken?.Cancel();
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loading.Show();
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if (e.NewValue == null)
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{
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Header.SetFrontPage();
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LoadDisplay(new FrontPageDisplay());
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return;
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}
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Header.SetArticle(e.NewValue);
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LoadDisplay(Empty());
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}
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protected void LoadDisplay(Drawable display)
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{
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scrollFlow.ScrollToStart();
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LoadComponentAsync(display, loaded =>
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{
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content.Child = loaded;
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loading.Hide();
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}, (cancellationToken = new CancellationTokenSource()).Token);
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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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}
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}
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