osu-lazer/osu.Game.Rulesets.Mania/Skinning/HitTargetInsetContainer.cs

// 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 osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Rulesets.Mania.UI;
using osu.Game.Rulesets.UI.Scrolling;
using osu.Game.Skinning;

namespace osu.Game.Rulesets.Mania.Skinning
{
    public class HitTargetInsetContainer : Container
    {
        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();

        protected override Container<Drawable> Content => content;
        private readonly Container content;

        private float hitPosition;

        public HitTargetInsetContainer()
        {
            RelativeSizeAxes = Axes.Both;

            InternalChild = content = new Container { RelativeSizeAxes = Axes.Both };
        }

        [BackgroundDependencyLoader]
        private void load(ISkinSource skin, IScrollingInfo scrollingInfo)
        {
            hitPosition = skin.GetManiaSkinConfig<float>(LegacyManiaSkinConfigurationLookups.HitPosition)?.Value ?? Stage.HIT_TARGET_POSITION;

            direction.BindTo(scrollingInfo.Direction);
            direction.BindValueChanged(onDirectionChanged, true);
        }

        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
        {
            content.Padding = direction.NewValue == ScrollingDirection.Up
                ? new MarginPadding { Top = hitPosition }
                : new MarginPadding { Bottom = hitPosition };
        }
    }
}