Add circular button file

osu.Game/Screens/Edit/Screens/Setup/Components/OsuSetupCircularButton.cs

@@ -0,0 +1,133 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using OpenTK;
+using OpenTK.Graphics;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using System;
+
+namespace osu.Game.Screens.Edit.Screens.Setup.Components
+{
+    public class OsuSetupCircularButton : Container, IHasAccentColour
+    {
+        private readonly Box fill;
+        private readonly OsuSpriteText label;
+
+        public const float DEFAULT_LABEL_TEXT_SIZE = 14;
+        public const float SIZE_X = 125;
+        public const float SIZE_Y = 30;
+
+        public event Action ButtonClicked;
+
+        private bool disabled;
+        public bool Disabled
+        {
+            get => disabled;
+            set
+            {
+                disabled = value;
+                fadeColour();
+            }
+        }
+
+        private Color4 defaultColour;
+        public Color4 DefaultColour
+        {
+            get => defaultColour;
+            set
+            {
+                defaultColour = value;
+                fadeColour();
+            }
+        }
+
+        private Color4 accentColour;
+        public Color4 AccentColour
+        {
+            get => accentColour;
+            set
+            {
+                accentColour = value;
+                fill.Colour = value;
+            }
+        }
+
+        private string labelText;
+        public string LabelText
+        {
+            get => labelText;
+            set
+            {
+                labelText = value;
+                label.Text = value;
+            }
+        }
+
+        public OsuSetupCircularButton()
+        {
+            Size = new Vector2(SIZE_X, SIZE_Y);
+            CornerRadius = 15;
+            Masking = true;
+
+            Children = new Drawable[]
+            {
+                fill = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    AlwaysPresent = true,
+                },
+                label = new OsuSpriteText
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Colour = Color4.White,
+                    TextSize = DEFAULT_LABEL_TEXT_SIZE,
+                    Text = LabelText,
+                    Font = @"Exo2.0-Bold",
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            FadeEdgeEffectTo(0);
+        }
+
+        protected override bool OnClick(InputState state)
+        {
+            // Effect to indicate the button has been clicked
+            if (!disabled)
+                ButtonClicked?.Invoke();
+            return base.OnClick(state);
+        }
+
+        protected override bool OnHover(InputState state)
+        {
+            fadeColour();
+            return base.OnHover(state);
+        }
+
+        protected override void OnHoverLost(InputState state)
+        {
+            fadeColour();
+            base.OnHoverLost(state);
+        }
+
+        private void fadeColour()
+        {
+            if (!disabled)
+            {
+                this.FadeAccent(defaultColour.Lighten(IsHovered ? 0.3f : 0), 500, Easing.OutQuint);
+                this.FadeTo(1, 500, Easing.OutQuint);
+            }
+            else
+                this.FadeTo(0.3f, 500, Easing.OutQuint);
+        }
+    }
+}