implement and apply version manager to show the version.

osu.Game.Rulesets.Karaoke/Screens/Settings/KaraokeSettings.cs

@@ -59,7 +59,8 @@ public KaraokeSettings()
                     {
                         RelativeSizeAxes = Axes.Both,
                         Padding = new MarginPadding { Top = Header.HEIGHT, Left = KaraokeSettingsPanel.WIDTH }
-                    }
+                    },
+                    new KaraokeVersionManager().With(x => x.Show())
                 }
             };
 

osu.Game.Rulesets.Karaoke/Screens/Settings/KaraokeVersionManager.cs

@@ -0,0 +1,96 @@
+// Copyright (c) andy840119 <[email protected]>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Development;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.Textures;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets.Karaoke.Utils;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Karaoke.Screens.Settings
+{
+    public class KaraokeVersionManager : VisibilityContainer
+    {
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours, TextureStore textures)
+        {
+            AutoSizeAxes = Axes.Both;
+            Anchor = Anchor.BottomCentre;
+            Origin = Anchor.BottomCentre;
+
+            Alpha = 0;
+
+            FillFlowContainer mainFill;
+
+            Children = new Drawable[]
+            {
+                mainFill = new FillFlowContainer
+                {
+                    AutoSizeAxes = Axes.Both,
+                    Direction = FillDirection.Vertical,
+                    Children = new Drawable[]
+                    {
+                        new FillFlowContainer
+                        {
+                            AutoSizeAxes = Axes.Both,
+                            Direction = FillDirection.Horizontal,
+                            Spacing = new Vector2(5),
+                            Anchor = Anchor.TopCentre,
+                            Origin = Anchor.TopCentre,
+                            Children = new Drawable[]
+                            {
+                                new OsuSpriteText
+                                {
+                                    Font = OsuFont.GetFont(weight: FontWeight.Bold),
+                                    Text = new KaraokeRuleset().ShortName
+                                },
+                                new OsuSpriteText
+                                {
+                                    Colour = DebugUtils.IsDebugBuild ? colours.Red : Color4.White,
+                                    Text = VersionUtils.DisplayVersion
+                                },
+                            }
+                        },
+                    }
+                }
+            };
+
+            if (!VersionUtils.IsDeployedBuild)
+            {
+                mainFill.AddRange(new Drawable[]
+                {
+                    new OsuSpriteText
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        Font = OsuFont.Numeric.With(size: 12),
+                        Colour = colours.Yellow,
+                        Text = @"Development Build"
+                    },
+                    new Sprite
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        Texture = textures.Get(@"Menu/dev-build-footer"),
+                    },
+                });
+            }
+        }
+
+        protected override void PopIn()
+        {
+            this.FadeIn(1400, Easing.OutQuint);
+        }
+
+        protected override void PopOut()
+        {
+            this.FadeOut(500, Easing.OutQuint);
+        }
+    }
+}