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Let selection container handle manual selection changes

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This commit is contained in:
Derrick Timmermans
2021-07-06 13:24:18 +02:00
parent c5a0672277
commit 07d54d261a
3 changed files with 31 additions and 24 deletions
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31
osu.Game/Graphics/Containers/SelectionCycleFillFlowContainer.cs
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@ -1,6 +1,8 @@
// 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;
using System.Collections.Generic;
using osu.Framework;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
@ -60,5 +62,34 @@ namespace osu.Game.Graphics.Containers
}
public T Selected => (selectedIndex >= 0 && selectedIndex < Count) ? this[selectedIndex.Value] : null;
private readonly Dictionary<T, Action<SelectionState>> handlerMap = new Dictionary<T, Action<SelectionState>>();
public override void Add(T drawable)
{
// This event is used to update selection state when modified within the drawable itself.
// It is added to a dictionary so that we can unsubscribe if the drawable is removed from this container
drawable.StateChanged += handlerMap[drawable] = state => selectionChanged(drawable, state);
base.Add(drawable);
}
public override bool Remove(T drawable)
{
if (!base.Remove(drawable))
return false;
drawable.StateChanged -= handlerMap[drawable];
handlerMap.Remove(drawable);
return true;
}
private void selectionChanged(T drawable, SelectionState state)
{
if (state == SelectionState.NotSelected)
Deselect();
else
Select(drawable);
}
}
}