Justin McCandless justinmc

Building Flutter 💙

justinmc / main.dart

Last active April 7, 2025 20:19

Reparenting FocusNode example.

	import 'package:flutter/material.dart';
	import 'package:flutter/services.dart';

	// Modified from the FocusNode example in the docs:
	// https://main-api.flutter.dev/flutter/widgets/FocusNode-class.html

	void main() => runApp(const FocusNodeExampleApp());

	class FocusNodeExampleApp extends StatelessWidget {
	const FocusNodeExampleApp({super.key});

justinmc / main.dart

Created February 21, 2025 20:57

Demonstrates that SelectableText focus bugs don't happen with SelectionArea instead

	import 'package:flutter/material.dart';

	void main() => runApp(MyApp());

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return const MaterialApp(
	title: 'Flutter Demo',
	home: Scaffold(

justinmc / main.dart

Created January 14, 2025 19:44

How Container can cause a loss of state lower in the tree.

	import 'package:flutter/material.dart';

	void main() {
	runApp(const MyApp());
	}

	class MyApp extends StatelessWidget {
	const MyApp({super.key});

	@override

justinmc / main.dart

Created August 23, 2024 18:53

Coloring a known formatted text structure based on flat ranges

	import 'dart:math' as math;

	import 'package:flutter/material.dart';

	void main() {
	runApp(const MyApp());
	}

	class MyApp extends StatelessWidget {
	const MyApp({super.key});

justinmc / main.dart

Created August 8, 2024 22:50

Simple example of rich text in a TextField by overriding TextEditingController

	import 'package:flutter/material.dart';

	// This example shows how to format input text in a TextField using TextSpans.

	void main() {
	runApp(const MyApp());
	}

	class MyApp extends StatelessWidget {
	const MyApp({Key? key}) : super(key: key);

justinmc / main.dart

Last active August 7, 2024 21:34

Example of predictive back (root and transitions) working with Navigator 2.0

	import 'package:flutter/foundation.dart';
	import 'package:flutter/material.dart';

	void main() async {
	runApp(_MyApp());
	}

	class _MyApp extends StatelessWidget {
	_MyApp();

justinmc / main.dart

Last active August 7, 2024 21:35

MaterialApp.router example

	import 'package:flutter/foundation.dart';
	import 'package:flutter/material.dart';

	void main() async {
	runApp(_MyApp());
	}

	class _MyApp extends StatelessWidget {
	_MyApp();

justinmc / main.dart

Last active April 20, 2024 00:31

Example of conflicting horizontal gesture recognizers

	import 'package:flutter/gestures.dart';
	import 'package:flutter/material.dart';

	void main() => runApp(const ExampleApp());

	class ExampleApp extends StatelessWidget {
	const ExampleApp({super.key});

	@override
	Widget build(BuildContext context) {

justinmc / main.dart

Created March 15, 2024 19:05

How to return a value from a route dismissed by system back gesture. Will break predictive back in a root route, and maybe an antipattern overall.

	import 'package:flutter/material.dart';

	void main() {
	runApp(const MyApp());
	}

	class MyApp extends StatelessWidget {
	const MyApp({Key? key}) : super(key: key);

	@override

justinmc / main.dart

Created February 23, 2024 00:58

Shows how keyboard shortcuts can interfere with text input, and how to solve that.

	import 'package:flutter/material.dart';
	import 'package:flutter/services.dart';

	void main() {
	runApp(const MyApp());
	}

	class MyApp extends StatelessWidget {
	const MyApp({super.key});