Jeremiah Ogbomo jogboms

Routes as Values

Most Flutter routers were architected before Dart 3 had sealed types and pattern matching. One has been redesigned around them. Here's the value-oriented shape no one has built yet.

The thesis

Flutter's two most-adopted routing libraries — go_router and auto_route — were architected in a world before Dart had sealed classes, exhaustive pattern matching, and records. Both shipped their core API in 2021–2022, and both still organize themselves around the same primitive: a string path, parsed at runtime, with type safety bolted on via build_runner.

Hey 👋

This is an attempt to recreate to a degree the essence of Riverpod. There is also a Flutter version https://gist.github.com/jogboms/f7f44f11e2d9aa30d355f94f5257281d.

Warning

As you would later notice, there are two major missing pieces: A robust error handling mechanism & Tests. The goal is educational and not a replacement of the said library.

See the hosted version on DartPad.

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

Demystifying the journey from Widget to the RenderObject.

These are Dartpad links to the examples. Full repo can be found jogboms/flutter_guild_demo

Widget ・ Gist ・ Dartpad

Multi-Child layout ・ Gist ・ Dartpad

CustomPainter ・ Gist ・ Dartpad

Terminal Flutter

For fun, I recreated a subset of Flutter that is sufficient to build a tiny Minesweeper application for the terminal.

Here is how it looks:

+----------------------+
|Minesweeper       3/12|
| |

Canvas GUI

So you want to create a GUI from scratch using HTML canvas?

Colors

Let's start with an abstraction for ARGB color values:

class Color {

	# Fetch remote updates, rebase the stack onto the latest base, and push changed layers.
	# Works best when stack branches use the `stack/` prefix, e.g. `stack/my-feature`.

	customCommands:
	- key: '#'
	description: 'gh stack'
	commandMenu:
	- key: 'h'
	description: 'Handle stack state'
	commandMenu:

	import 'package:flutter/material.dart';

	class _CupertinoSplashFactory extends InteractiveInkFeatureFactory {
	const _CupertinoSplashFactory();

	@override
	InteractiveInkFeature create({
	required MaterialInkController controller,
	required RenderBox referenceBox,
	required Offset position,

	// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
	// for details. All rights reserved. Use of this source code is governed by a
	// BSD-style license that can be found in the LICENSE file.

	import 'dart:math' as math;

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

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

	void main() => runApp(
	const MaterialApp(
	debugShowCheckedModeBanner: false,
	home: ParallaxHeaderDemo(),
	),
	);