osu-lazer/osu.Game/Overlays/TabControlOverlayHeader.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 System;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.UserInterface;
using osu.Game.Graphics;
using osuTK;

namespace osu.Game.Overlays
{
    public abstract class TabControlOverlayHeader<T> : ControllableOverlayHeader<T>
    {
        protected OverlayHeaderTabControl TabControl;

        protected override TabControl<T> CreateTabControl() => TabControl = new OverlayHeaderTabControl();

        public class OverlayHeaderTabControl : OverlayTabControl<T>
        {
            public OverlayHeaderTabControl()
            {
                BarHeight = 1;
                RelativeSizeAxes = Axes.None;
                AutoSizeAxes = Axes.X;
                Anchor = Anchor.BottomLeft;
                Origin = Anchor.BottomLeft;
                Height = 35;

                if (typeof(T).IsEnum)
                {
                    foreach (var val in (T[])Enum.GetValues(typeof(T)))
                        AddItem(val);
                }
            }

            protected override TabItem<T> CreateTabItem(T value) => new OverlayHeaderTabItem(value)
            {
                AccentColour = AccentColour,
            };

            protected override TabFillFlowContainer CreateTabFlow() => new TabFillFlowContainer
            {
                RelativeSizeAxes = Axes.Y,
                AutoSizeAxes = Axes.X,
                Direction = FillDirection.Horizontal,
                Spacing = new Vector2(5, 0),
            };

            private class OverlayHeaderTabItem : OverlayTabItem
            {
                public OverlayHeaderTabItem(T value)
                    : base(value)
                {
                    Text.Text = value.ToString().ToLowerInvariant();
                    Text.Font = OsuFont.GetFont(size: 14);
                    Bar.ExpandedSize = 5;
                }
            }
        }
    }
}