From ad8a680b7642b148e37b7f8802e2c7c524ebd388 Mon Sep 17 00:00:00 2001
From: Eric <ericchen87887@gmail.com>
Date: Sun, 25 Oct 2026 20:33:04 +0800
Subject: [PATCH] fix nav wheel snaping

---
 tg_test/WheelNavBar.swift | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tg_test/WheelNavBar.swift b/tg_test/WheelNavBar.swift
index 65f3215..66c2612 100644
--- a/tg_test/WheelNavBar.swift
+++ b/tg_test/WheelNavBar.swift
@@ -108,8 +108,11 @@ struct WheelNavBar: View {
                         }
                     }
                     .onEnded { value in
-                        let velocity = value.predictedEndTranslation.width / itemSpacing
-                        let calcIndex = Double(selectedIndex) - Double(value.translation.width / itemSpacing) - (velocity * 0.2)
+                        // Momentum = how far the gesture would coast past the finger's release point.
+                        // Cap it to one tab so a hard flick can't skip several tabs.
+                        let momentum = value.predictedEndTranslation.width - value.translation.width
+                        let cappedMomentum = min(max(momentum, -itemSpacing), itemSpacing)
+                        let calcIndex = Double(selectedIndex) - Double((value.translation.width + cappedMomentum * 0.5) / itemSpacing)
                         let targetIndex = min(max(Int(round(calcIndex)), 0), tabs.count - 1)
                         
                         withAnimation(.spring(response: 0.35, dampingFraction: 0.75)) {