flutter_rebound 0.3.0+1

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  • Changelog
  • Example
  • Installing
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Flutter Rebound #

pub package

A Flutter library that models spring dynamics and adds real world physics to your app. inspired by Facebook Rebound

图片名称

Usage #

To use this plugin, add flutter_rebound as a dependency in your pubspec.yaml file.

Example #

// Import package
import 'package:flutter_rebound/flutter_rebound.dart';
import 'package:flutter/material.dart';
class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
  SpringSystem system;
  Spring spring;
  double _scale = 1;

  @override
  void initState() {
    super.initState();
    system = SpringSystem(vsync: this);
    spring = system.createSpring(40, 3);
    spring.addUpdateListener((spring) {
      double value = spring.currentValue;
      _scale = 1 - value * 0.5;
      setState(() {});
    });
    spring.endValue = 1;
  }

  @override
  void dispose() {
    system.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Transform.scale(
          scale: _scale,
          child: Container(
            width: 200,
            height: 200,
            color: Colors.red,
          ),
        ),
      ),
    );
  }
}

0.3.0+1 #

  • update README

0.3.0 #

  • fix some bugs

0.2.0 #

  • To optimize the system

0.1.0 #

  • A Flutter library that models spring dynamics and adds real world physics to your app.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_rebound/flutter_rebound.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
  SpringSystem system;
  Spring spring;
  double _scale = 1;

  @override
  void initState() {
    super.initState();
    system = SpringSystem(vsync: this);
    spring = system.createSpring(tension: 40, friction: 3);
    spring.addUpdateListener((spring) {
      double value = spring.currentValue;
      _scale = mapValueFromRangeToRange(value, 0, -1, 1, 0.5);
      setState(() {});
    });
  }

  @override
  void dispose() {
    system.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: GestureDetector(
          onTapDown: (e) {
            spring.endValue = -1;
          },
          onTapUp: (_) {
            spring.endValue = 0;
          },
          child: Transform.scale(
            scale: _scale,
            child: Container(
              width: 200,
              height: 200,
              color: Colors.red,
            ),
          ),
        ),
      ),
    );
  }
}

double mapValueFromRangeToRange(
  value,
  fromLow,
  fromHigh,
  toLow,
  toHigh,
) {
  var fromRangeSize = fromHigh - fromLow;
  var toRangeSize = toHigh - toLow;
  var valueScale = (value - fromLow) / fromRangeSize;
  return toLow + valueScale * toRangeSize;
}

Use this package as a library

1. Depend on it

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


dependencies:
  flutter_rebound: ^0.3.0+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:flutter_rebound/flutter_rebound.dart';
  
Popularity:
Describes how popular the package is relative to other packages. [more]
3
Health:
Code health derived from static analysis. [more]
99
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
100
Overall:
Weighted score of the above. [more]
51
Learn more about scoring.

We analyzed this package on Jul 2, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.9+1
  • Flutter: 1.17.3

Analysis suggestions

Package not compatible with SDK dart

because of import path [flutter_rebound]

Health issues and suggestions

Document public APIs. (-0.61 points)

74 out of 75 API elements have no dartdoc comment.Providing good documentation for libraries, classes, functions, and other API elements improves code readability and helps developers find and use your API.

Format lib/flutter_rebound.dart.

Run flutter format to format lib/flutter_rebound.dart.

Format lib/src/spring.dart.

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

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.12 1.14.13
meta 1.1.8 1.2.0
sky_engine 0.0.99
typed_data 1.1.6 1.2.0
vector_math 2.0.8
Dev dependencies
flutter_test