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Code generator for Monarch. Monarch lets you generate stories for your widgets.

Monarch #

Build high-quality flutter widgets faster.

Monarch is a tool for developing widgets in isolation. It makes building beautiful widgets a more pleasant and faster experience. It is inspired by Storybook.

Monarch allows you to browse a widget library, view the different states of each widget, and interactively develop widgets.

Workflow #

First, you write stories for the widgets you want to test. A story is a function that returns a widget in a specific state. For example, if you have a widget called MyFancyCard that takes in a title, then you could write these two stories:

Widget shortTitle() => MyFancyCard(title: 'A');

Widget longTitle() => MyFancyCard(title: 'Much longer title');

Then, you will run the Monarch task runner which will generate the code needed to display your stories in the Monarch desktop app. You can now see your stories in isolation, without all of you app's dependencies.

This is the alpha release of Monarch. We only support flutter development on macOS for now.

Installation #

  1. Add monarch and build_runner to your project dev_dependencies:
  monarch: ^0.0.29
  build_runner: ^1.7.1
  1. Run flutter pub get on your project.

  2. Create a build.yaml file at the top level of your project and add the following:

      - $package$
      - lib/**
      - stories/**
  1. Download the Monarch tools, which include the task runner and desktop app. Download them into your directory of choice using curl, for example:
$ cd ~/development
$ curl -O
$ unzip

Usage #

Write stories #

To write stories just create a stories directory at the top level of your project. Then start adding files that end in *_stories.dart.

You could also add stories inside your lib directory. The only requirement is that story files should end in *_stories.dart.

Stories are functions that return a Widget. Therefore, your stories code doesn't require a dependency to Monarch. Also, since stories are plain functions, they can be re-used from your widget tests.

Run the task runner to see your stories #

The monarch_task_runner will prepare your stories so you can use them in the Monarch desktop app.

To run the monarch_task_runner, enter this command from inside your project directory.

$ ~/development/monarch_tools/monarch_task_runner

You should see the task runner working and eventually opening the Monarch app.

Once the app opens, you should see your stories listed on screen. You can select each story to see how it would render. You can also select different device resolutions, themes and locales.

You can now add more stories. As you add more stories, the task runner will automatically detect the changes and reload the stories in the app.

The task runner will generate a .monarch directory in your project. You can gitignore that directory.

# in .gitignore

Themes #

Your stories can render using your app's themes. If you want to see themes in Monarch then you need to add the package:monarch_annotations to your dependencies:

  monarch_annotations: ^0.0.12

Then, you can annotate your themes:

import 'package:monarch_annotations/monarch_annotations.dart';

@MonarchTheme('Fancy Theme')
final fancyTheme = ThemeData(...);

When you run the Monarch app, you should be able to select your theme in the Theme dropdown.

Internationalization (or Localizations) #

If your application is internationalized (or localized), you can render your stories using the locales you have declared in code.

First, make sure to add the package:monarch_annotations to your dependencies:

  monarch_annotations: ^0.0.12

Then, you can annotate your app-specific localizations delegate:

import 'package:monarch_annotations/monarch_annotations.dart';

class MyLocalizationsDelegate extends LocalizationsDelegate<MyLocalizations> {...}

@MonarchLocalizations([MonarchLocale('en', 'US'), MonarchLocale('es')])
const myLocalizationsDelegate = MyLocalizationsDelegate();

In the example above, the locales en-US and es will display in the Monarch app.

When you run the Monarch app, you should be able to select the locales you want to use from the Locale dropdown.

Troubleshooting #

If you experience any issues while running the task runner, you can run it in verbose mode.

$ ~/path/to/monarch_task_runner --verbose