Introduction to Addons

Addons in Widgetbook provide an expandable, customizable way to tweak your development environment. With options to use pre-existing Addons or to forge your own, the possibilities for tailoring your domain to your specific project needs are substantial.

Here are the fundamental components of our Addon system:

• Fields and Their Significance: Fields play a crucial role in our system, representing the data inputs used in the settings panel. These predefined and reusable UI elements are used to structure and define the behavior of your Addons. With the help of Fields, you can specify how your Addons function and appear within your development environment.

• Into Widgets: Fields can morph into Widgets displayed in the settings panel. This transformation helps in visualizing the settings directly within the development environment.

• Creation of Custom Addons: Creating custom Addons using fields is essential to our system. This process empowers developers to design Addons that cater to their unique requirements.

• The Role of the appBuilder Function: While the appBuilder function is still available for use, developers also have the flexibility to define their Addons to inject functionality directly into the Widget tree. This feature allows for customization of the previewing experience based on the project's needs.

• Order of injection and its Effect: The sequence in which Addons and their functionalities are injected into the Widgetbook is determined by their specification order. For example, if you specify Widgetbook(Addons: [ThemeAddon(...), LocalizationAddon(...)]), the Theme widget will be a parent to the Localizations widget. This order generally doesn't affect the preview significantly but can subtly alter how widgets are previewed.

These key aspects combine to make our Addon system versatile and highly customizable, enabling you to tailor your Widgetbook environment to your specific project needs.

Available Addons

Widgetbook comes equipped with a variety of ready-to-use Addons:

• Theme Addon: Provides theming options.
  • Material Theme Addon
  • Cupertino Theme Addon
  • Custom Theme Addon
• Device Frame Addon: Facilitates previewing use-cases on specific device sizes.
• Localization Addon: Enables testing across different locales.
• Text Scale Addon: Supports varying text scales and aids in accessibility testing.
• Alignment Addon: Enables centering the use-case within the workbench.
• Grid Addon: Enables displaying a pixel grid.

Example using Generator approach

Below is a code snippet that encapsulates these concepts:

// lib/widgetbook.dart
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:widgetbook/widgetbook.dart';
import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
import 'package:widgetbook_core/widgetbook_core.dart';

import 'widgetbook.directories.g.dart';

void main() {
  runApp(const WidgetbookApp());
}

@widgetbook.App()
class WidgetbookApp extends StatelessWidget {
  const WidgetbookApp({super.key});

  @override
  Widget build(BuildContext context) {
    return Widgetbook.material(
      directories: directories,
      addons: [
        MaterialThemeAddon(
          themes: [
            WidgetbookTheme(
              name: 'Light',
              data: yourCustomLightTheme
            ),
            WidgetbookTheme(
              name: 'Dark',
              data: yourCustomTheme
            ),
          ],
        ),
        TextScaleAddon(
          scales: [1.0, 2.0],
        ),
        LocalizationAddon(
          locales: [
            const Locale('en', 'US'),
          ],
          localizationsDelegates: [
            DefaultWidgetsLocalizations.delegate,
            DefaultMaterialLocalizations.delegate,
          ],
        ),
        DeviceFrameAddon(
          devices: [
            Devices.ios.iPhoneSE,
            Devices.ios.iPhone13,
          ],
        ),
        GridAddon(),
      ],
      appBuilder: (context, child) {
        return ScreenUtilInit(
          designSize: const Size(375, 812),
          minTextAdapt: true,
          splitScreenMode: true,
          useInheritedMediaQuery: true,
          builder: (context, child) {
            return MaterialApp(
              debugShowCheckedModeBanner: false,
              home: child,
            );
          },
          child: child,
        );
      },
    );
  }
}

The above example demonstrates how you can use different Addons such as MaterialThemeAddon, TextScaleAddon, LocalizationAddon, DeviceFrameAddon and GridAddon in Widgetbook. It also shows how to customize the appBuilder function to inject the ScreenUtilInit widget into the Widget tree. Our Addon system in Widgetbook is designed to enhance flexibility, interoperability, and overall user experience. By understanding and effectively utilizing this system, you can unlock new possibilities and efficiencies in your development process.