Initial commit

lib/features/detail/widgets/multi_source_scroll.dart

@@ -0,0 +1,19 @@
+
+library;
+
+
+double multiSourceScrollOffset({
+  required int activeIndex,
+  required double viewportWidth,
+  required double leadingPad,
+  required double maxScrollExtent,
+  double cardWidth = 220.0,
+  double cardGap = 12.0,
+}) {
+  if (activeIndex <= 0) return 0.0;
+  final target =
+      leadingPad +
+      activeIndex * (cardWidth + cardGap) -
+      (viewportWidth - cardWidth) / 2;
+  return target.clamp(0.0, maxScrollExtent).toDouble();
+}