fix: guard ScrollController.position access in HorizontalScrollWithArrows

Prevents "Too many elements" StateError on Android TV when the controller temporarily has multiple positions during widget rebuilds.
2026-03-03 20:45:38 +01:00
parent 174c78bf67
commit cb7de47aed
1 changed files with 10 additions and 1 deletions
@@ -52,7 +52,15 @@ class _HorizontalScrollWithArrowsState extends State<HorizontalScrollWithArrows>
  }

  void _updateScrollState() {
-    if (!mounted) return;
+    if (!mounted || _scrollController.positions.length != 1) {
+      if (mounted && (_canScrollLeft || _canScrollRight)) {
+        setState(() {
+          _canScrollLeft = false;
+          _canScrollRight = false;
+        });
+      }
+      return;
+    }

    final position = _scrollController.position;
    setState(() {
@@ -62,6 +70,7 @@ class _HorizontalScrollWithArrowsState extends State<HorizontalScrollWithArrows>
  }

  void _animateScroll(double direction) {
+    if (_scrollController.positions.length != 1) return;
    final position = _scrollController.position;
    final delta = direction * position.viewportDimension * widget.scrollAmount;
    final targetScroll = (position.pixels + delta).clamp(0.0, position.maxScrollExtent);