osu-lazer/osu.Game/Screens/SelectV2/PanelGroup.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.Diagnostics;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Pooling;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Game.Graphics;
using osu.Game.Graphics.Sprites;
using osu.Game.Overlays;
using osuTK;
using osuTK.Graphics;

namespace osu.Game.Screens.SelectV2
{
    public partial class PanelGroup : PoolableDrawable, ICarouselPanel
    {
        public const float HEIGHT = CarouselItem.DEFAULT_HEIGHT;

        private const float duration = 500;

        [Resolved]
        private BeatmapCarousel? carousel { get; set; }

        private CarouselPanelPiece panel = null!;
        private Drawable chevronIcon = null!;
        private OsuSpriteText titleText = null!;

        [BackgroundDependencyLoader]
        private void load(OverlayColourProvider colourProvider)
        {
            Anchor = Anchor.TopRight;
            Origin = Anchor.TopRight;
            RelativeSizeAxes = Axes.X;
            Height = HEIGHT;

            InternalChild = panel = new CarouselPanelPiece(0)
            {
                Action = () => carousel?.Activate(Item!),
                Icon = chevronIcon = new SpriteIcon
                {
                    AlwaysPresent = true,
                    Icon = FontAwesome.Solid.ChevronDown,
                    Size = new Vector2(12),
                    Margin = new MarginPadding { Horizontal = 5f },
                    X = 2f,
                    Colour = colourProvider.Background3,
                },
                Background = new Box
                {
                    RelativeSizeAxes = Axes.Both,
                    Colour = colourProvider.Dark1,
                },
                AccentColour = colourProvider.Highlight1,
                Children = new Drawable[]
                {
                    titleText = new OsuSpriteText
                    {
                        Anchor = Anchor.CentreLeft,
                        Origin = Anchor.CentreLeft,
                        X = 10f,
                    },
                    new CircularContainer
                    {
                        Anchor = Anchor.CentreRight,
                        Origin = Anchor.CentreRight,
                        Size = new Vector2(50f, 14f),
                        Margin = new MarginPadding { Right = 20f },
                        Masking = true,
                        Children = new Drawable[]
                        {
                            new Box
                            {
                                RelativeSizeAxes = Axes.Both,
                                Colour = Color4.Black.Opacity(0.7f),
                            },
                            new OsuSpriteText
                            {
                                Anchor = Anchor.Centre,
                                Origin = Anchor.Centre,
                                Font = OsuFont.Torus.With(size: 14.4f, weight: FontWeight.Bold),
                                // TODO: requires Carousel/CarouselItem-side implementation
                                Text = "43",
                                UseFullGlyphHeight = false,
                            }
                        },
                    }
                }
            };
        }

        protected override void LoadComplete()
        {
            base.LoadComplete();

            Expanded.BindValueChanged(_ => onExpanded(), true);
            KeyboardSelected.BindValueChanged(k => panel.KeyboardActive.Value = k.NewValue, true);
        }

        private void onExpanded()
        {
            panel.Active.Value = Expanded.Value;
            panel.Flash();

            chevronIcon.ResizeWidthTo(Expanded.Value ? 12f : 0f, duration, Easing.OutQuint);
            chevronIcon.FadeTo(Expanded.Value ? 1f : 0f, duration, Easing.OutQuint);
        }

        protected override void PrepareForUse()
        {
            base.PrepareForUse();

            Debug.Assert(Item != null);

            GroupDefinition group = (GroupDefinition)Item.Model;

            titleText.Text = group.Title;

            FinishTransforms(true);
            this.FadeInFromZero(500, Easing.OutQuint);
        }

        #region ICarouselPanel

        public CarouselItem? Item { get; set; }
        public BindableBool Selected { get; } = new BindableBool();
        public BindableBool Expanded { get; } = new BindableBool();
        public BindableBool KeyboardSelected { get; } = new BindableBool();

        public double DrawYPosition { get; set; }

        public void Activated()
        {
        }

        #endregion
    }
}