delta_notifier 0.0.3

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delta_notifier #

A new Flutter package project.

Getting Started #

This project is a starting point for a Dart package, a library module containing code that can be shared easily across multiple Flutter or Dart projects.

For help getting started with Flutter, view our online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.

[0.0.1] - TODO: Add release date.

  • TODO: Describe initial release.
  • Fixes the url on pub.dev to the Github repo

[0.0.2] - Add beforeBuild handler and example

  • Adds the beforeBuild handler, called before setState if set.
  • Add basic example.
  • Restructure files

[0.0.3] - Add license

example/main.dart

import 'dart:async';

import 'package:delta_notifier/delta_notifier.dart';
import 'package:flutter/widgets.dart';

enum ModelChangeInfo {
  NoChange,
  FooChange,
  BarChange,
}

class MyModelWidget extends StatelessWidget {
  final Widget child;
  final MyModel model;

  MyModelWidget({this.child, this.model});

  @override
  Widget build(BuildContext context) {
    return AnimatedDeltaBuilder<ModelChangeInfo>(
      listenable: model,
      beforeBuild: (c) {
        //some code called before builder
        //can be used for navigation or something else
      },
      builder: (ctx, c) {
        Color col = Color(0xFF000000);

        switch (c) {
          case ModelChangeInfo.NoChange:
            {
              col = Color(0xFFFF0000);
              break;
            }
          case ModelChangeInfo.BarChange:
            {
              col = Color(0xFF00FF00);
              break;
            }
          case ModelChangeInfo.FooChange:
            {
              col = Color(0xFF0000FF);
              break;
            }
        }
        return Column(children: [
          Text(
            model.foo,
            style: TextStyle(color: col),
          ),
          Text(
            model.bar,
            style: TextStyle(color: col),
          ),
        ]);
      },
    );
  }
}

class MyModel extends DeltaNotifer<ModelChangeInfo> {
  int _updateCounter;

  String foo;
  String bar;

  MyModel() {
    Timer(Duration(seconds: 1), () {
      if ((++_updateCounter) % 2 == 0) {
        foo = "Foo: $_updateCounter";
        notifyListeners(ModelChangeInfo.FooChange);
      } else {
        bar = "Bar: $_updateCounter";
        notifyListeners(ModelChangeInfo.BarChange);
      }
    });
  }
}

Use this package as a library

1. Depend on it

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


dependencies:
  delta_notifier: ^0.0.3

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:delta_notifier/delta_notifier.dart';
  
Popularity:
Describes how popular the package is relative to other packages. [more]
58
Health:
Code health derived from static analysis. [more]
100
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
90
Overall:
Weighted score of the above. [more]
77
Learn more about scoring.

We analyzed this package on Oct 11, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.5.1
  • pana: 0.12.21
  • Flutter: 1.9.1+hotfix.4

Platforms

Detected platforms: Flutter

References Flutter, and has no conflicting libraries.

Health suggestions

Format lib/src/delta_builder.dart.

Run flutter format to format lib/src/delta_builder.dart.

Maintenance suggestions

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.

Dependencies

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
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies
flutter_test