Add barline implementation

osu.Game.Rulesets.Taiko/Skinning/Argon/ArgonBarLine.cs

@@ -0,0 +1,83 @@
+// 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.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Taiko.Objects.Drawables;
+using osuTK;
+
+namespace osu.Game.Rulesets.Taiko.Skinning.Argon
+{
+    public class ArgonBarLine : CompositeDrawable
+    {
+        private Container majorEdgeContainer = null!;
+
+        private Bindable<bool> major = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(DrawableHitObject drawableHitObject)
+        {
+            RelativeSizeAxes = Axes.Both;
+
+            const float line_offset = 8;
+            var majorPieceSize = new Vector2(6, 20);
+
+            InternalChildren = new Drawable[]
+            {
+                line = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    EdgeSmoothness = new Vector2(0.5f, 0),
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                majorEdgeContainer = new Container
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Children = new[]
+                    {
+                        new Circle
+                        {
+                            Name = "Top line",
+                            Anchor = Anchor.TopCentre,
+                            Origin = Anchor.BottomCentre,
+                            Size = majorPieceSize,
+                            Y = -line_offset,
+                        },
+                        new Circle
+                        {
+                            Name = "Bottom line",
+                            Anchor = Anchor.BottomCentre,
+                            Origin = Anchor.TopCentre,
+                            Size = majorPieceSize,
+                            Y = line_offset,
+                        },
+                    }
+                }
+            };
+
+            major = ((DrawableBarLine)drawableHitObject).Major.GetBoundCopy();
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+            major.BindValueChanged(updateMajor, true);
+        }
+
+        private Box line = null!;
+
+        private void updateMajor(ValueChangedEvent<bool> major)
+        {
+            line.Alpha = major.NewValue ? 1f : 0.5f;
+            line.Width = major.NewValue ? 1 : 0.5f;
+            majorEdgeContainer.Alpha = major.NewValue ? 1 : 0;
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Skinning/Argon/TaikoArgonSkinTransformer.cs

@@ -35,6 +35,9 @@ public TaikoArgonSkinTransformer(ISkin skin)
 
                         case TaikoSkinComponents.HitTarget:
                             return new ArgonHitTarget();
+
+                        case TaikoSkinComponents.BarLine:
+                            return new ArgonBarLine();
                     }
 
                     break;