38 lines
961 B
Dart
38 lines
961 B
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'dpad_navigator.dart';
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/// Handles back key events by popping the current route.
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///
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/// Optionally pass a [result] to return to the previous route.
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///
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/// Use this as an `onKeyEvent` callback for Focus widgets that need
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/// simple back navigation behavior:
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///
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/// ```dart
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/// Focus(
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/// onKeyEvent: (node, event) => handleBackKeyNavigation(context, event),
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/// child: ...
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/// )
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/// ```
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///
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/// With a result value:
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/// ```dart
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/// Focus(
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/// onKeyEvent: (node, event) => handleBackKeyNavigation(
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/// context,
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/// event,
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/// result: _hasChanges,
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/// ),
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/// child: ...
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/// )
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/// ```
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KeyEventResult handleBackKeyNavigation<T>(BuildContext context, KeyEvent event, {T? result}) {
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if (event is KeyDownEvent && event.logicalKey.isBackKey) {
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Navigator.pop(context, result);
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return KeyEventResult.handled;
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}
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return KeyEventResult.ignored;
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}
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