Categories
Technology Tutorials

Flutter Button Functionality and Styling

One of my main focuses recently is diving into Flutter, a really interesting coding language developed by Google on top of Dart.

I’m going to show off some some simple code you can use to get a basic understanding of how Flutter buttons can be styled and modified for functionality.

Here’s the video tutorial I made outlining how to modify button styling and how to modify this basic Flutter button.

Here’s your main.dart code

Here’s the github repo here with all this code as well

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



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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Sick Nasty Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many freakin times:',
            ),
            Text(
              '$_counter', // this is what it is adding to
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      
      floatingActionButton: FancyButton ( // this is where the action button is created
        onPressed: _incrementCounter, // when you click it, it adds to the counter
        ), // 

    );
  }
}

Here’s your fancybutton.dart code (put this in the lib folder)

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

class FancyButton extends StatelessWidget {
  // start with a stateless widget
  FancyButton({@required this.onPressed});

  final GestureTapCallback onPressed;
  //this deals with 
  @override
  Widget build(BuildContext context) {
    return new RawMaterialButton(
      fillColor: Colors.deepOrange[300], // this is the primary color
      splashColor: Colors.deepOrange[100], // this is the onclick color

        child: Padding(padding: const EdgeInsets.symmetric( // this is the padding for the button
          vertical: 50.0,
          horizontal: 50.0,
        ),
      
      child: Text( // this determines what text will go in the button, also styles
          "Press Me",
          style: (TextStyle(
            color: Colors.black,
            
          )
          ),
        ),
      ),
      onPressed: onPressed, // this references the onPressed in main.dart
      shape: const StadiumBorder(), // this creates a pill shaped button
      );
      
  }
}

Leave a Reply

Your email address will not be published. Required fields are marked *