A1: scharfschalten DrawHoverSheen accent-tint (Variante A)

HellionChat/Ui/StyleEngine/DrawListExtensions.cs

@@ -12,9 +12,16 @@ namespace HellionChat.Ui.StyleEngine;
 // ABGR before delegating to ImDrawList. Hover-sheen state lives in a small
 // static dictionary keyed by constant strings — keep keys constant and
 // scope to static UI elements so the per-key footprint stays bounded.
+// TEST-MIRROR: Util/ColourUtilTintTests.cs
 internal static class DrawListExtensions
 {
     private const float SheenDurationSeconds = 0.65f;
+
+    // A1 accent-tint (Variante A): how far the white sweep is pulled toward
+    // the element's accent hue. Kept low so the sheen reads as a tinted
+    // highlight, not a saturated accent flash (effect level "subtle").
+    private const float SheenTintStrength = 0.35f;
+
     private static readonly Dictionary<string, DateTime> SheenStarts = new();
 
     public static void DrawHoverSheen(
@@ -46,7 +53,11 @@ internal static class DrawListExtensions
 
         var t = (float)(elapsed / SheenDurationSeconds);
         var alpha = (byte)Math.Round(0x40 * (1f - t));
-        var sheenAbgr = ((uint)alpha << 24) | 0x00FFFFFFu;
+        // Tint the sweep toward the accent hue, then stamp the falloff alpha.
+        // accentRgba is RGBA; convert to ABGR FIRST or the draw-list swaps R/B.
+        var accentAbgr = ColourUtil.RgbaToAbgr(accentRgba);
+        var tintedRgb = ColourUtil.LerpTowardWhite(accentAbgr, SheenTintStrength) & 0x00FFFFFFu;
+        var sheenAbgr = ((uint)alpha << 24) | tintedRgb;
         var sweepX = min.X + (max.X - min.X) * t;
         dl.AddRectFilled(
             new Vector2(sweepX - 12f, min.Y),
@@ -54,11 +65,6 @@ internal static class DrawListExtensions
             sheenAbgr,
             2f
         );
-
-        // Accent currently unused — reserved for a tinted-sweep variant that
-        // tracks the element's accent hue. Keeping it in the signature so
-        // call-sites don't churn when the tinted path lands.
-        _ = accentRgba;
     }
 
     public static void DrawGlowBorder(