stage 0.0.1

  • Readme
  • Changelog
  • Installing
  • 41

stage #

Build arbitrarily complex layout with imperative code.

Getting Started #

import 'package:stage/stage.dart';

/// use Stage widget in your widget: 

Widget build(BuildContext context) {
    return Stage<int>(
        itemBuilder: (context, int layer) {
          return Text('$layer',
              textDirection: TextDirection.ltr, key: Key('$layer'));
        stageBuilder: (selectItem, constraints) {
          final items = [

          items.forEach((item) => item.layout(constraints));

          final data =
     => item.parentData as StageParentData).toList();

          data[0].offset = Offset(10, 10);
          data[1].offset = Offset(20, 20);
          data[2].offset = Offset(30, 30);

          return constraints.biggest;

Stage will render 3 Text widgets, with corresponding offset.


  • Initial release.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  stage: ^0.0.1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:stage/stage.dart';
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Learn more about scoring.

We analyzed this package on Nov 22, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.6.1
  • pana: 0.12.21
  • Flutter: 1.9.1+hotfix.6

Maintenance issues and suggestions

Homepage URL doesn't exist. (-20 points)

At the time of the analysis the homepage field was unreachable.

Maintain an example. (-10 points)

Create a short demo in the example/ directory to show how to use this package.

Common filename patterns include main.dart, example.dart, and stage.dart. Packages with multiple examples should provide example/

For more information see the pub package layout conventions.

Package is pre-v0.1 release. (-10 points)

While nothing is inherently wrong with versions of 0.0.*, it might mean that the author is still experimenting with the general direction of the API.

The package description is too short. (-6 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.7 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies