fabiomsr

class CounterText extends StatelessWidget {
  final ValueListenable<int> _counter;

  CounterText(this._counter);

  @override
  Widget build(BuildContext context) {
    return  ValueListenableBuilder<int>(
        valueListenable: _counter,
        builder: (context, value, child) {

fabiomsr

class Timer extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FlatButton(
      child: Text("Get time!"),
      onPressed: () {
        final time = DateTime.now().toIso8601String();
        TimeNotification(time: time)..dispatch(context);
      },
    );

fabiomsr

class TimeNotification extends Notification {
  final String time;

  const TimeNotification({this.time});
}

fabiomsr

class TimeNotification extends Notification {
  final String time;

  const TimeNotification({this.time});
}

fabiomsr

import 'dart:async';
import 'package:intl/intl.dart';


class Contact {

  static final DateFormat _formatter = DateFormat('MMMM d, yyyy');

  final String fullName;
  final String gender;

fabiomsr

import 'package:flutter/material.dart';

class FlexibleAppBar extends SliverAppBar {
  static const double height = 256.0;

  FlexibleAppBar(String title, String imageUrl) : super(
    pinned: true,
    expandedHeight: height,
    flexibleSpace: FlexibleSpaceBar(
        title: Text(title),

fabiomsr

class _ContactCategoryItem extends StatelessWidget {

  final IconData icon;
  final List<String> lines;

  _ContactCategoryItem({ Key key,  @required this.icon, @required this.lines })
    : super(key: key);

  @override
  Widget build(BuildContext context) {

fabiomsr

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: Center(
        child: Padding(
            padding: const EdgeInsets.only(left: 128.0),
              child: Text("Hello, World", textAlign: TextAlign.center)
        )

fabiomsr

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: Center(
        child: Text("Hello, World", textAlign: TextAlign.center)
        )
      )
  );

fabiomsr

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: Padding(
        padding: const EdgeInsets.only(top: 24.0),
          child: Text("Hello, World")
        )
      )