floating_bubble 0.0.4
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Generate a floating widget that sticks to the sides of the screen

example/lib/main.dart

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

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new 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 press Run > Flutter Hot Reload in IntelliJ). Notice that the
        // counter didn't reset back to zero; the application is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo 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() => new _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 Stack(
      children: <Widget>[
        new Scaffold(
          appBar: new 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: new Text(widget.title),
          ),
          body: new Center(
            // Center is a layout widget. It takes a single child and positions it
            // in the middle of the parent.
            child: new Column(
              // Column is also 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 paint" (press "p" in the console where you ran
              // "flutter run", or select "Toggle Debug Paint" from the Flutter tool
              // window in IntelliJ) 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>[
                new Text(
                  'The button in orange is the floating bubble.',
                ),
                new Text(
                  'It does the same thing as the scaffold-bound FAB.',
                ),
                new Text(
                  'You have pushed the button this many times:',
                ),
                new Text(
                  '$_counter',
                  style: Theme.of(context).textTheme.display1,
                ),
              ],
            ),
          ),
          floatingActionButton: new FloatingActionButton(
            onPressed: _incrementCounter,
            tooltip: 'Increment',
            child: new Icon(Icons.add),
          ), // This trailing comma makes auto-formatting nicer for build methods.
        ),
        FloatingBubble(
          child: PreferredSize(
            child: FloatingActionButton(
              backgroundColor: Colors.orange,
              child: const Icon(Icons.add),
              onPressed: _incrementCounter,
            ),
            preferredSize: const Size(64.0, 64.0),
          ),
        )
      ],
    );
  }
}
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Generate a floating widget that sticks to the sides of the screen

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