feat: focus navigation for movie detail sections

close #464
2026-02-16 02:17:10 +01:00
parent 53c94b14cc
commit 23c4c400f0
4 changed files with 657 additions and 474 deletions
@@ -0,0 +1,25 @@
+import 'package:flutter/widgets.dart';
+
+/// Scroll a horizontal list to center the item at the given index.
+///
+/// Assumes items are laid out with [leadingPadding] before the first item,
+/// and each item occupies [itemExtent] pixels (including per-item padding).
+void scrollListToIndex(
+  ScrollController controller,
+  int index, {
+  required double itemExtent,
+  double leadingPadding = 12.0,
+  bool animate = true,
+}) {
+  if (!controller.hasClients || itemExtent <= 0) return;
+
+  final viewport = controller.position.viewportDimension;
+  final targetCenter = leadingPadding + (index * itemExtent) + (itemExtent / 2);
+  final desiredOffset = (targetCenter - (viewport / 2)).clamp(0.0, controller.position.maxScrollExtent);
+
+  if (animate) {
+    controller.animateTo(desiredOffset, duration: const Duration(milliseconds: 150), curve: Curves.easeOut);
+  } else {
+    controller.jumpTo(desiredOffset);
+  }
+}