From 70387c19f3f4be9413541b2588d1cf0d9de49d60 Mon Sep 17 00:00:00 2001
From: Andrei Zavatski <megaman9919@gmail.com>
Date: Sat, 4 Jan 2020 19:36:05 +0300
Subject: [PATCH] Implement proper DrawablePage component

---
 .../UserInterface/TestScenePageSelector.cs    |  17 ++-
 .../PageSelector/DrawablePage.cs              | 108 ++++++++++++++++++
 .../PageSelector/PageSelector.cs              |   2 +
 3 files changed, 126 insertions(+), 1 deletion(-)
 create mode 100644 osu.Game/Graphics/UserInterface/PageSelector/DrawablePage.cs

diff --git a/osu.Game.Tests/Visual/UserInterface/TestScenePageSelector.cs b/osu.Game.Tests/Visual/UserInterface/TestScenePageSelector.cs
index 59491b7f90..aad640ab58 100644
--- a/osu.Game.Tests/Visual/UserInterface/TestScenePageSelector.cs
+++ b/osu.Game.Tests/Visual/UserInterface/TestScenePageSelector.cs
@@ -13,10 +13,12 @@ namespace osu.Game.Tests.Visual.UserInterface
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {
-            typeof(PageSelector)
+            typeof(PageSelector),
+            typeof(DrawablePage)
         };
 
         private readonly PageSelector pageSelector;
+        private readonly DrawablePage drawablePage;
 
         public TestScenePageSelector()
         {
@@ -26,6 +28,12 @@ namespace osu.Game.Tests.Visual.UserInterface
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
+                },
+                drawablePage = new DrawablePage(1234)
+                {
+                    Anchor = Anchor.TopCentre,
+                    Origin = Anchor.TopCentre,
+                    Margin = new MarginPadding { Top = 50 },
                 }
             });
         }
@@ -58,6 +66,13 @@ namespace osu.Game.Tests.Visual.UserInterface
             AddAssert("Current is 1, max is 1", () => pageSelector.CurrentPage.Value == 1 && pageSelector.MaxPages.Value == 1);
         }
 
+        [Test]
+        public void TestDrawablePage()
+        {
+            AddStep("Select", () => drawablePage.Selected = true);
+            AddStep("Deselect", () => drawablePage.Selected = false);
+        }
+
         private void setMaxPages(int maxPages) => pageSelector.MaxPages.Value = maxPages;
 
         private void setCurrentPage(int currentPage) => pageSelector.CurrentPage.Value = currentPage;
diff --git a/osu.Game/Graphics/UserInterface/PageSelector/DrawablePage.cs b/osu.Game/Graphics/UserInterface/PageSelector/DrawablePage.cs
new file mode 100644
index 0000000000..fe91874159
--- /dev/null
+++ b/osu.Game/Graphics/UserInterface/PageSelector/DrawablePage.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.Graphics.Containers;
+using osu.Framework.Graphics;
+using osu.Framework.Bindables;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using osu.Framework.Input.Events;
+
+namespace osu.Game.Graphics.UserInterface.PageSelector
+{
+    public class DrawablePage : OsuClickableContainer
+    {
+        private const int duration = 200;
+
+        private readonly BindableBool selected = new BindableBool();
+
+        public bool Selected
+        {
+            get => selected.Value;
+            set => selected.Value = value;
+        }
+
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        private readonly Box background;
+        private readonly OsuSpriteText text;
+
+        public DrawablePage(int page)
+        {
+            AutoSizeAxes = Axes.X;
+            Height = PageSelector.HEIGHT;
+            Child = new CircularContainer
+            {
+                RelativeSizeAxes = Axes.Y,
+                AutoSizeAxes = Axes.X,
+                Masking = true,
+                Children = new Drawable[]
+                {
+                    background = new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Alpha = 0,
+                    },
+                    text = new OsuSpriteText
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        Text = page.ToString(),
+                        Font = OsuFont.GetFont(size: 12),
+                        Margin = new MarginPadding { Horizontal = 10 }
+                    }
+                }
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            background.Colour = colours.Lime;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            selected.BindValueChanged(onSelectedChanged, true);
+        }
+
+        private void onSelectedChanged(ValueChangedEvent<bool> selected)
+        {
+            background.FadeTo(selected.NewValue ? 1 : 0, duration, Easing.OutQuint);
+            text.FadeColour(selected.NewValue ? colours.GreySeafoamDarker : colours.Lime, duration, Easing.OutQuint);
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            if (!selected.Value)
+                selected.Value = true;
+
+            return base.OnClick(e);
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            updateHoverState();
+            return base.OnHover(e);
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            base.OnHoverLost(e);
+            updateHoverState();
+        }
+
+        private void updateHoverState()
+        {
+            if (selected.Value)
+                return;
+
+            text.FadeColour(IsHovered ? colours.Lime.Lighten(20f) : colours.Lime, duration, Easing.OutQuint);
+        }
+    }
+}
diff --git a/osu.Game/Graphics/UserInterface/PageSelector/PageSelector.cs b/osu.Game/Graphics/UserInterface/PageSelector/PageSelector.cs
index 6767cb3a75..54e3a035ec 100644
--- a/osu.Game/Graphics/UserInterface/PageSelector/PageSelector.cs
+++ b/osu.Game/Graphics/UserInterface/PageSelector/PageSelector.cs
@@ -20,6 +20,8 @@ namespace osu.Game.Graphics.UserInterface.PageSelector
 {
     public class PageSelector : CompositeDrawable
     {
+        public const int HEIGHT = 20;
+
         public readonly BindableInt CurrentPage = new BindableInt(1);
         public readonly BindableInt MaxPages = new BindableInt(1);