DefaultTextEditingShortcuts

snippet.packages.flutter.lib.src.widgets.default_text_editing_shortcuts.67.

  

// ignore_for_file: directives_ordering
// ignore_for_file: unnecessary_import
// ignore_for_file: unused_import
// ignore_for_file: unused_element
// ignore_for_file: unused_local_variable
import 'dart:async';
import 'dart:convert';
import 'dart:math' as math;
import 'dart:typed_data';
import 'dart:ui' as ui;
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/painting.dart';
import 'package:flutter/physics.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/semantics.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter/animation.dart';
import 'package:flutter/services.dart';

// From: packages/flutter/lib/src/widgets/default_text_editing_shortcuts.dart:67
class IncrementCounterIntent extends Intent {}
class DecrementCounterIntent extends Intent {}

class MyWidget extends StatefulWidget {
  const MyWidget({ Key? key }) : super(key: key);

  @override
  MyWidgetState createState() => MyWidgetState();
}

class MyWidgetState extends State {

  int _counter = 0;

  @override
  Widget build(BuildContext context) {
    // If using WidgetsApp or its descendents MaterialApp or CupertinoApp,
    // then DefaultTextEditingShortcuts is already being inserted into the
    // widget tree.
    return DefaultTextEditingShortcuts(
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
            Shortcuts(
              shortcuts: {
                const SingleActivator(LogicalKeyboardKey.arrowUp): IncrementCounterIntent(),
                const SingleActivator(LogicalKeyboardKey.arrowDown): DecrementCounterIntent(),
              },
              child: Actions(
                actions: >{
                  IncrementCounterIntent: CallbackAction(
                    onInvoke: (IncrementCounterIntent intent) {
                      setState(() {
                        _counter++;
                      });
                      return null;
                    },
                  ),
                  DecrementCounterIntent: CallbackAction(
                    onInvoke: (DecrementCounterIntent intent) {
                      setState(() {
                        _counter--;
                      });
                      return null;
                    },
                  ),
                },
                child: const TextField(
                  maxLines: 2,
                  decoration: InputDecoration(
                    hintText: 'Up/down increment/decrement here.',
                  ),
                ),
              ),
            ),
            const TextField(
              maxLines: 2,
              decoration: InputDecoration(
                hintText: 'Up/down behave normally here.',
              ),
            ),
          ],
        ),
      ),
    );
  }
}