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osu-lazer/osu.Game/Screens/OnlinePlay/Components/OnlinePlayBackgroundScreen.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System.Threading;
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using osu.Framework.Allocation;
using osu.Framework.Extensions.Color4Extensions;
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using osu.Framework.Graphics;
using osu.Framework.Graphics.Colour;
using osu.Framework.Graphics.Shapes;
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using osu.Framework.Screens;
using osu.Game.Beatmaps;
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using osu.Game.Online.Rooms;
using osuTK;
using osuTK.Graphics;
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#nullable enable
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namespace osu.Game.Screens.OnlinePlay.Components
{
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public abstract class OnlinePlayBackgroundScreen : BackgroundScreen
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{
private CancellationTokenSource? cancellationSource;
private PlaylistItemBackground? background;
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protected OnlinePlayBackgroundScreen()
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: base(false)
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{
AddInternal(new Box
{
RelativeSizeAxes = Axes.Both,
Depth = float.MinValue,
Colour = ColourInfo.GradientVertical(Color4.Black.Opacity(0.9f), Color4.Black.Opacity(0.6f))
});
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}
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[BackgroundDependencyLoader]
private void load()
{
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switchBackground(new PlaylistItemBackground(playlistItem));
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}
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private PlaylistItem? playlistItem;
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protected PlaylistItem? PlaylistItem
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{
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get => playlistItem;
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set
{
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if (playlistItem == value)
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return;
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playlistItem = value;
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if (LoadState > LoadState.Ready)
updateBackground();
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}
}
private void updateBackground()
{
Schedule(() =>
{
var beatmap = playlistItem?.Beatmap;
string? lastCover = (background?.Beatmap?.BeatmapSet as IBeatmapSetOnlineInfo)?.Covers.Cover;
string? newCover = (beatmap?.BeatmapSet as IBeatmapSetOnlineInfo)?.Covers.Cover;
if (lastCover == newCover)
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return;
cancellationSource?.Cancel();
LoadComponentAsync(new PlaylistItemBackground(playlistItem), switchBackground, (cancellationSource = new CancellationTokenSource()).Token);
});
}
private void switchBackground(PlaylistItemBackground newBackground)
{
float newDepth = 0;
if (background != null)
{
newDepth = background.Depth + 1;
background.FinishTransforms();
background.FadeOut(250);
background.Expire();
}
newBackground.Depth = newDepth;
newBackground.BlurTo(new Vector2(10));
AddInternal(background = newBackground);
}
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public override void OnSuspending(IScreen next)
{
base.OnSuspending(next);
this.MoveToX(0, TRANSITION_LENGTH);
}
public override bool OnExiting(IScreen next)
{
bool result = base.OnExiting(next);
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this.MoveToX(0);
return result;
}
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}
}