osu/osu.Game/Graphics/Cursor/MenuCursorContainer.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.
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using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Cursor;
using osu.Framework.Input;
using osu.Framework.Input.StateChanges;
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namespace osu.Game.Graphics.Cursor
{
/// <summary>
/// A container which provides a <see cref="MenuCursor"/> which can be overridden by hovered <see cref="Drawable"/>s.
/// </summary>
public class MenuCursorContainer : Container, IProvideCursor
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{
protected override Container<Drawable> Content => content;
private readonly Container content;
/// <summary>
/// Whether any cursors can be displayed.
/// </summary>
internal bool CanShowCursor = true;
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public CursorContainer Cursor { get; }
public bool ProvidingUserCursor => true;
public MenuCursorContainer()
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{
AddRangeInternal(new Drawable[]
{
Cursor = new MenuCursor { State = { Value = Visibility.Hidden } },
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content = new Container { RelativeSizeAxes = Axes.Both }
});
}
private InputManager inputManager;
protected override void LoadComplete()
{
base.LoadComplete();
inputManager = GetContainingInputManager();
}
private IProvideCursor currentTarget;
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protected override void Update()
{
base.Update();
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var lastMouseSource = inputManager.CurrentState.Mouse.LastSource;
bool hasValidInput = lastMouseSource != null && !(lastMouseSource is ISourcedFromTouch);
if (!hasValidInput || !CanShowCursor)
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{
currentTarget?.Cursor?.Hide();
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currentTarget = null;
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return;
}
IProvideCursor newTarget = this;
foreach (var d in inputManager.HoveredDrawables)
{
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if (d is IProvideCursor p && p.ProvidingUserCursor)
{
newTarget = p;
break;
}
}
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if (currentTarget == newTarget)
return;
currentTarget?.Cursor?.Hide();
newTarget.Cursor?.Show();
currentTarget = newTarget;
}
}
}