dynamic_theme 1.0.0

Changes the theme during runtime, also presists brightness settings across restarts

example/lib/main.dart

import 'package:dynamic_theme/dynamic_theme.dart';
import 'package:dynamic_theme/theme_switcher_widgets.dart';
import 'package:flutter/material.dart';

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


class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new DynamicTheme(
      defaultBrightness: Brightness.light,
      data: (brightness) => new ThemeData(
        primarySwatch: Colors.indigo,
        brightness: brightness,
      ),
      themedWidgetBuilder: (context, theme) {
        return new MaterialApp(
          title: 'Flutter Demo',
          theme: theme,
          home: new MyHomePage(title: 'Flutter Demo Home Page'),
        );
      }
    );
  }
}

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

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

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Easy Theme"),
      ),
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new RaisedButton(onPressed: changeBrightness, child: new Text("Change brightness"),),
            new RaisedButton(onPressed: changeColor, child: new Text("Change color"),),
          ],
        ),
      ),
      floatingActionButton: new FloatingActionButton(
        onPressed: showChooser,
        child: new Icon(Icons.add),
      ),
      bottomNavigationBar: new BottomNavigationBar(
          items: [
            new BottomNavigationBarItem(
                icon: new Icon(Icons.insert_drive_file),
                title: new Text("Tab 1")
            ),
            new BottomNavigationBarItem(
                icon: new Icon(Icons.show_chart),
                title: new Text("Tab 2")
            ),
          ],
      ),
    );
  }


  void showChooser() {
    showDialog(context: context, builder: (context) {
      return new BrightnessSwitcherDialog(
        onSelectedTheme: (brightness) {
          DynamicTheme.of(context).setBrightness(brightness);
        },
      );
    });
  }


  void changeBrightness() {
    DynamicTheme.of(context).setBrightness(Theme.of(context).brightness == Brightness.dark? Brightness.light: Brightness.dark);
  }

  void changeColor() {
    DynamicTheme.of(context).setThemeData(new ThemeData(
        primaryColor: Theme.of(context).primaryColor == Colors.indigo? Colors.red: Colors.indigo
    ));
  }
}