mirror of https://github.com/ppy/osu
55 lines
1.5 KiB
C#
55 lines
1.5 KiB
C#
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System.Linq;
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using osu.Framework.Extensions.IEnumerableExtensions;
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using osu.Framework.Screens;
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namespace osu.Game.Graphics.UserInterface
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{
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/// <summary>
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/// A <see cref="BreadcrumbControl"/> which follows the active screen (and allows navigation) in a <see cref="Screen"/> stack.
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/// </summary>
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public class ScreenBreadcrumbControl : BreadcrumbControl<Screen>
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{
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private Screen last;
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public ScreenBreadcrumbControl(Screen initialScreen)
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{
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Current.ValueChanged += newScreen =>
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{
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if (last != newScreen && !newScreen.IsCurrentScreen)
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newScreen.MakeCurrent();
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};
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onPushed(initialScreen);
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}
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private void screenChanged(Screen newScreen)
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{
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if (newScreen == null) return;
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if (last != null)
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{
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last.Exited -= screenChanged;
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last.ModePushed -= onPushed;
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}
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last = newScreen;
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newScreen.Exited += screenChanged;
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newScreen.ModePushed += onPushed;
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Current.Value = newScreen;
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}
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private void onPushed(Screen screen)
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{
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Items.ToList().SkipWhile(i => i != Current.Value).Skip(1).ForEach(RemoveItem);
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AddItem(screen);
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screenChanged(screen);
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}
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}
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}
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