migration

PediFoods/Views/Main/HomeScrollOffsetObserver.swift

@@ -0,0 +1,33 @@
+import SwiftUI
+
+enum HomeScrollCoordinateSpace {
+    static let name = "home-scroll"
+}
+
+struct HomeScrollOffsetPreferenceKey: PreferenceKey {
+    static let defaultValue: CGFloat = 0
+
+    static func reduce(value: inout CGFloat, nextValue: () -> CGFloat) {
+        value = nextValue()
+    }
+}
+
+struct ScrollOffsetObserver: View {
+    let onOffsetChange: (CGFloat) -> Void
+
+    var body: some View {
+        Color.clear
+            .frame(height: 0)
+            .background(
+                GeometryReader { geometry in
+                    Color.clear.preference(
+                        key: HomeScrollOffsetPreferenceKey.self,
+                        value: geometry.frame(in: .named(HomeScrollCoordinateSpace.name)).minY
+                    )
+                }
+            )
+            .onPreferenceChange(HomeScrollOffsetPreferenceKey.self) { minY in
+                onOffsetChange(-minY)
+            }
+    }
+}