66 lines
1.8 KiB
Dart
66 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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import '../focus/input_mode_tracker.dart';
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/// A wrapper widget that provides autofocus functionality for bottom sheets.
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///
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/// When the sheet opens and keyboard/controller mode is active, this widget
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/// will automatically request focus on the provided [initialFocusNode].
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/// This enables keyboard/controller navigation within the sheet.
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///
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/// When opened via touch/mouse, no autofocus occurs to avoid showing
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/// focus indicators unnecessarily.
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class FocusableBottomSheet extends StatefulWidget {
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/// The content of the bottom sheet.
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final Widget child;
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/// The FocusNode to focus when the sheet opens in keyboard mode.
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/// If null, no autofocus occurs.
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final FocusNode? initialFocusNode;
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const FocusableBottomSheet({
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super.key,
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required this.child,
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this.initialFocusNode,
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});
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@override
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State<FocusableBottomSheet> createState() => _FocusableBottomSheetState();
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}
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class _FocusableBottomSheetState extends State<FocusableBottomSheet> {
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@override
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void initState() {
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super.initState();
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_requestInitialFocus();
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}
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void _requestInitialFocus() {
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if (widget.initialFocusNode == null) return;
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (!mounted) return;
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// Only autofocus when in keyboard/controller mode
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if (InputModeTracker.isKeyboardMode(context)) {
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widget.initialFocusNode?.requestFocus();
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}
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});
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}
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@override
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void didUpdateWidget(FocusableBottomSheet oldWidget) {
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super.didUpdateWidget(oldWidget);
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// If the focus node changed, request focus on the new one
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if (widget.initialFocusNode != oldWidget.initialFocusNode) {
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_requestInitialFocus();
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}
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}
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@override
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Widget build(BuildContext context) {
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return widget.child;
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}
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}
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