osu-lazer/osu.Game/Screens/Multi/Match/Components/MatchTabControl.cs

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using osu.Framework.Allocation;
using osu.Framework.Configuration;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Input.Events;
using osu.Game.Graphics.UserInterface;
using osu.Game.Online.Multiplayer;
using osuTK.Graphics;

namespace osu.Game.Screens.Multi.Match.Components
{
    public class MatchTabControl : PageTabControl<MatchPage>
    {
        private readonly IBindable<int?> roomIdBind = new Bindable<int?>();

        public MatchTabControl(Room room)
        {
            roomIdBind.BindTo(room.RoomID);

            AddItem(new RoomMatchPage());
            AddItem(new SettingsMatchPage());
        }

        [BackgroundDependencyLoader]
        private void load()
        {
            roomIdBind.BindValueChanged(v =>
            {
                if (v.HasValue)
                {
                    Items.ForEach(t => t.Enabled.Value = !(t is SettingsMatchPage));
                    Current.Value = new RoomMatchPage();
                }
                else
                {
                    Items.ForEach(t => t.Enabled.Value = t is SettingsMatchPage);
                    Current.Value = new SettingsMatchPage();
                }
            }, true);
        }

        protected override TabItem<MatchPage> CreateTabItem(MatchPage value) => new TabItem(value);

        private class TabItem : PageTabItem
        {
            private readonly IBindable<bool> enabled = new BindableBool();

            public TabItem(MatchPage value)
                : base(value)
            {
                enabled.BindTo(value.Enabled);
                enabled.BindValueChanged(v => Colour = v ? Color4.White : Color4.Gray);
            }

            protected override bool OnClick(ClickEvent e)
            {
                if (!enabled.Value)
                    return true;
                return base.OnClick(e);
            }
        }
    }
}