Implement basic years panel

osu.Game.Tests/Visual/Online/TestSceneNewsYearsPanel.cs

@@ -0,0 +1,34 @@
+// 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.Graphics;
+using osu.Game.Overlays.News.Sidebar;
+using osu.Framework.Allocation;
+using osu.Game.Overlays;
+
+namespace osu.Game.Tests.Visual.Online
+{
+    public class TestSceneNewsYearsPanel : OsuTestScene
+    {
+        [Cached]
+        private readonly OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Purple);
+
+        private readonly YearsPanel panel;
+
+        public TestSceneNewsYearsPanel()
+        {
+            Add(panel = new YearsPanel()
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre
+            });
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            AddStep("Load years", () => panel.Years = new[] { 1000, 2000, 3000, 4000 });
+            AddStep("Load different years", () => panel.Years = new[] { 1001, 2001, 3001, 4001, 5001, 6001, 7001, 8001 });
+        }
+    }
+}

osu.Game/Overlays/News/Sidebar/YearsPanel.cs

@@ -0,0 +1,108 @@
+// 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.Graphics.Containers;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osuTK;
+using System.Linq;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using System.Collections.Generic;
+using osu.Game.Graphics;
+using osu.Framework.Bindables;
+using System.Collections.Specialized;
+
+namespace osu.Game.Overlays.News.Sidebar
+{
+    public class YearsPanel : CompositeDrawable
+    {
+        public int[] Years
+        {
+            set
+            {
+                years.Clear();
+                years.AddRange(value);
+            }
+        }
+
+        private readonly BindableList<int> years = new BindableList<int>();
+
+        private FillFlowContainer<YearButton> flow;
+
+        [BackgroundDependencyLoader]
+        private void load(OverlayColourProvider colourProvider)
+        {
+            Width = 160;
+            AutoSizeAxes = Axes.Y;
+            Masking = true;
+            CornerRadius = 6;
+            InternalChildren = new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Colour = colourProvider.Background3
+                },
+                new Container
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
+                    Padding = new MarginPadding(5),
+                    Child = flow = new FillFlowContainer<YearButton>
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Spacing = new Vector2(5)
+                    }
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            years.BindCollectionChanged((u, v) =>
+            {
+                switch (v.Action)
+                {
+                    case NotifyCollectionChangedAction.Add:
+                        flow.Children = years.Select(y => new YearButton(y)).ToArray();
+                        break;
+                }
+            }, true);
+        }
+
+        private class YearButton : OsuHoverContainer
+        {
+            protected override IEnumerable<Drawable> EffectTargets => new[] { text };
+
+            private readonly int year;
+            private readonly OsuSpriteText text;
+
+            public YearButton(int year)
+            {
+                this.year = year;
+
+                Size = new Vector2(33.75f, 15);
+                Child = text = new OsuSpriteText
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Font = OsuFont.GetFont(size: 12),
+                    Text = year.ToString()
+                };
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(OverlayColourProvider colourProvider)
+            {
+                IdleColour = colourProvider.Light2;
+                HoverColour = colourProvider.Light1;
+                Action = () => { }; // TODO
+            }
+        }
+    }
+}