stegrams’s gists

stegrams / linked_dropboxes.dart

Created March 28, 2021 23:42

Linked dropboxes. Changing the selected value of the first, triggers the items replacement of the second

	import 'package:flutter/material.dart';

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

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

stegrams / smoothies_json_decode.dart

Last active December 30, 2020 12:37

Decoding a JSON response in a concise way (version 1) and in a more "official way" (version 2)

	// Version 2: The official way based on https://jsontodart.com converter, with a grain of my salt
	import 'dart:convert';

	void main() {
	List<SmoothieModel> smoothies = jsonDecode(json_str)
	.map<SmoothieModel>((s) => SmoothieModel.fromJson(s))
	.toList();
	print(smoothies);
	}

stegrams / dialog_dismiss_latency.dart

Last active August 15, 2020 13:04

Unable to reproduce a question's dialog freeze after user response.

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

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

	class MyApp extends StatelessWidget {
	@override

stegrams / response_after_stateful_disposal.dart

Last active June 7, 2020 23:40

When setState called after await completion, usually there is not state to update. This an attempt to amend the issue.

	import 'dart:async';
	import 'dart:convert';
	import 'dart:math';
	import 'dart:html';

	import 'package:flutter/material.dart';

	Future<String> fetchHttpRes(int id) async {
	final f1 = 'first_name', f2 = 'last_name', timeoutSec = 300;
	final url = 'https://reqres.in/api/users/$id?delay=$id';

stegrams / show_form_dialog.dart

Last active June 2, 2020 23:37

Show a form as custom dialog and collect the field values.

	import 'package:flutter/material.dart';

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

	@immutable
	class CategoryModel {
	const CategoryModel({this.name, this.keywords});

	final String name;
	final String keywords;

stegrams / calculated_textformfield.dart

Last active June 2, 2020 01:30

A form field that it's value is calculated based on the values of two others.

	import 'package:flutter/material.dart';

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

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

stegrams / anim_map_location.dart

Last active May 28, 2020 19:13

Map location with an animated wave.

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

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

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {

stegrams / path_combine_intersect.dart

Last active May 24, 2020 11:39

Shape rendering and intersection with Path and Path.combine.

	import 'package:flutter/material.dart';

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

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return MaterialApp(

stegrams / hack_no_uniform_border_radius.dart

Last active May 25, 2020 00:15

A small hack to apply circular radius to an uniform border.

	import 'package:flutter/material.dart';

	final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

	class MyApp extends StatelessWidget {
	@override

stegrams / variable_field_number_form.dart

Created May 17, 2020 10:55

A minimal form sample with adjustable number of fields.

	import 'package:flutter/material.dart';

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

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

Stefanos Grammenos stegrams