Assignment 1: Time to Practice: Flutter Basics

main.dart

import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutterass1/textcontrol.dart';
import 'package:flutterass1/wisdom.dart';

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

class AssignmentApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _AssignmentAppState();
  }
}

class _AssignmentAppState extends State<AssignmentApp> {
  var _textIndex = 0;

  final texts = [
    'To enjoy good health, to bring true happiness to one\'s family, to bring peace to all, one must first discipline and control one\'s own mind. If a man can control his mind he can find the way to Enlightenment, and all wisdom and virtue will naturally come to him.',
    'We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves.',
    'There are only two mistakes one can make along the road to truth; not going all the way, and not starting.',
    'No one saves us but ourselves. No one can and no one may. We ourselves must walk the path.',
    'Unity can only be manifested by the Binary. Unity itself and the idea of Unity are already two.',
    'In a controversy the instant we feel anger we have already ceased striving for the truth, and have begun striving for ourselves.'
  ];

  void _getRandomText() {
    int newTextIndex = new Random().nextInt(texts.length);
    if (newTextIndex == _textIndex) {
      _getRandomText();
    } else {
      print(_textIndex);
      print(newTextIndex);
      setState(() => _textIndex = newTextIndex);
    }
  }

  @override
  Widget build(BuildContext context) {
    // get random thought first
    _getRandomText();

    return MaterialApp(home: Scaffold(
      appBar: AppBar(title: Text('Buddha\'s Thoughts'), backgroundColor: Colors.deepPurple),
      body: Wisdom(texts[_textIndex]),
      floatingActionButton: TextControl('Rethink', onPressed: _getRandomText),
      floatingActionButtonLocation: FloatingActionButtonLocation.endFloat
    ));
  }
}

textcontrol.dart

import 'package:flutter/material.dart';

class TextControl extends StatelessWidget {
  final String buttonText;
  final Function onPressed;

  TextControl(this.buttonText, { this.onPressed });

  @override
  Widget build(BuildContext context) {
    return FloatingActionButton(
      onPressed: onPressed,
      tooltip: buttonText,
      child: Icon(Icons.rotate_left),
      backgroundColor: Colors.amber,
      foregroundColor: Colors.black,
    );
  }
}

wisdom.dart

import 'package:flutter/material.dart';

class Wisdom extends StatelessWidget {
  final String text;

  Wisdom(this.text);

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Container(
          margin: EdgeInsets.all(30),
          child: Text(
            text,
            style: TextStyle(
              fontSize: 28,
              fontWeight: FontWeight.bold
            ),
            textAlign: TextAlign.center
          )
        )
      ]
    );
  }
}