coordinator_layout 0.0.5+5

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  • Changelog
  • Example
  • Installing
  • 66

coordinator_layout #

pub package

a Library contains widget/layout to handle collapsing header behavior

Alt Text

Example #

CoordinatorLayout(
    maxHeight: 200,
    minHeight: kToolbarHeight + MediaQuery.of(context).padding.top,
    headers: [
        SliverCollapsingHeader(
            builder: (context, offset, diff) {
                return ...;
            },
        ),
    ],
    body: Container(height: null, child: buildBody(context)),
),

Fit content

CoordinatorLayout(
    headerMaxHeight: 200,
    headerMinHeight: kToolbarHeight + MediaQuery.of(context).padding.top,
    header:[ 
        Builder(builder: (context) {
            return SliverOverlapAbsorber(
            handle: NestedScrollView.sliverOverlapAbsorberHandleFor(context),
            sliver: SliverSafeArea(
                top: false,
                sliver: SliverCollapsingHeader(
                builder: (context, offset, diff) {
                    return ...;
                },
                ),
            ),
            );
        }),
    ],
    body: Container(height: null, child: buildBody(context)),
),

0.0.5+5 #

  • invert offset value
  • add proper example

0.0.4+4 #

0.0.3+3 #

  • Refactor

0.0.2+2 #

  • Replace 'header' with 'headers'

0.0.1+1 #

  • CollapsingHeader Widget
  • CoordinatorLayout Widget

example/lib/main.dart

import 'dart:ui';

import 'package:coordinator_layout/coordinator_layout.dart';
import 'package:flutter/material.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(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    double headerMinHeight =
        kToolbarHeight + MediaQuery.of(context).padding.top;
    return Scaffold(
      body: CoordinatorLayout(
        headerMaxHeight: headerMinHeight + 80,
        headerMinHeight: headerMinHeight,
        headers: [
          Builder(builder: (context) {
            return SliverOverlapAbsorber(
              handle: NestedScrollView.sliverOverlapAbsorberHandleFor(context),
              sliver: SliverSafeArea(
                top: false,
                sliver: SliverCollapsingHeader(
                  builder: (context, offset, diff) {
                    return Card(
                      margin: EdgeInsets.only(bottom: 0),
                      child: SingleChildScrollView(
                        physics: NeverScrollableScrollPhysics(),
                        child: Stack(
                          children: <Widget>[
                            Opacity(
                              opacity: offset,
                              child: Container(
                                margin: EdgeInsets.only(
                                    top: headerMinHeight * (offset)),
                                padding: EdgeInsets.symmetric(
                                    horizontal: 32, vertical: 8),
                                child: Row(
                                  children: <Widget>[
                                    Expanded(
                                      flex: 1,
                                      child: Text("Point : 30,200"),
                                    ),
                                    FloatingActionButton.extended(
                                      backgroundColor: Colors.green,
                                      onPressed: () {},
                                      label: Text("View"),
                                    ),
                                  ],
                                ),
                              ),
                            ),
                            AppBar(
                              title: Text("Home"),
                            ),
                          ],
                        ),
                      ),
                    );
                  },
                ),
              ),
            );
          })
        ],
        body: Container(height: null, child: buildBody(context)),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  Center buildBody(BuildContext context) {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.start,
        children: <Widget>[
          Text(
            'You have pushed the button this many times:',
          ),
          Text(
            '$_counter',
            style: Theme.of(context).textTheme.headline4,
          ),
        ],
      ),
    );
  }
}

Use this package as a library

1. Depend on it

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


dependencies:
  coordinator_layout: ^0.0.5+5

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:coordinator_layout/coordinator_layout.dart';
  
Popularity:
Describes how popular the package is relative to other packages. [more]
36
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]
66
Learn more about scoring.

We analyzed this package on Jul 9, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.14
  • Flutter: 1.17.5

Analysis suggestions

Package not compatible with SDK dart

Because:

  • coordinator_layout that is a package requiring null.

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 1.14.12 1.14.13
meta 1.1.8 1.2.1
sky_engine 0.0.99
typed_data 1.1.6 1.2.0
vector_math 2.0.8 2.1.0-nullsafety
Dev dependencies
flutter_test