CS 492 Week 5 Exploration 1 Exercise

hint.txt

Look for the occurrences of FIXME.

FIXME 1
Be sure the data type is correct.

FIXME 2
Remember the best practice.

FIXME 3
Remember to invoke super.

FIXME 4
Be sure the method signature is correct.

FIXME 5
What should it do with this widget?

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(PuppyApp(puppyName: 'Fido'));
}

abstract class PuppyApp { // FIXME 1
  
  final String puppyName;
  
  /* FIXME 2 */ PuppyApp({Key key, this.puppyName}) : /* FIXME 3 */ ;
  
  @override
  void build() { /* FIXME 4 */
    Center(child: Text('$puppyName', textDirection: TextDirection.ltr)); /* FIXME 5 */
  }
  
}

solution.dart

import 'package:flutter/material.dart';

void main() {
  runApp(PuppyApp(puppyName: 'Fido'));
}

class PuppyApp extends StatelessWidget { // FIXED: Extend StatelessWidget
  
  final String puppyName;
  
  // FIXED: Define a const constructor
  const PuppyApp({Key key, this.puppyName}) : super(key: key); // FIXED: Invoke super.
  
  @override
  Widget build(BuildContext context) { // FIXED: Return a Widget, receive a BuildContext.
    return Center(child: Text('$puppyName', textDirection: TextDirection.ltr));
  } // FIXED: Return the widget
  
}