可滾動列表標籤視圖

scrollable_list_tabview

A Flutter widget which synchronize a ScrollView and a custom tab view.

The main idea is to create a custom tab view synchronizing with inner ScrollView. The scroll activity will trigger custom tab view at the top to follow the index of the inner scroll view widget.

Installation

Add dependency for package on your pubspec.yaml:

dependencies:
    scrollable_list_tabview: <latest>

Usage

To use this widget we must first define how our tabs will look like.

ListTab

Parameter	Definition
Widget icon	Trailing widget for a tab, typically an Icon.
Widget label	Label to be shown in the tab, must be non-null.
BorderRadiusGeometry borderRadius	BorderRadius value for a single tab.
Color activeBackgroundColor	Color to be used when the tab is selected.
Color inactiveBackgroundColor	Color to be used when the tab isn't selected.
bool showIconInList	Decide whether show icon widget in the scrollable view.
Color borderColor	Color of the border of tab when its not selected

Then we can use LisTab in ScrollableListTab.

ScrollableListTab

Parameter	Definition
ListTab tab	Data model used for rendering tab widgets.
ScrollView body	An individual inner scrollable widget.

Then ScrollableListTabView will take a list of ScrollableListTab as an argument.

ScrollableListTabView

Parameter	Definition
List<ScrollableListTab> tabs	List of tabs to be built.
double height	Height of the tab at the top of the view.
Duration tabAnimationDuration	Duration of tab change animation.
Duration bodyAnimationDuration	Duration of inner scroll view animation.
Curve tabAnimationCurve	Animation curve used when animating tab change.
Curve bodyAnimationCurve	Animation curve used when changing index of inner ScrollView(s).

Example

import 'package:flutter/material.dart';
import 'package:scrollable_list_tabview/scrollable_list_tabview.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',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter ScrollableListTabView Example'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: ScrollableListTabView(
        tabHeight: 48,
        tabs: [
          ScrollableListTab(
              tab: ListTab(label: Text('Label 1'), icon: Icon(Icons.group)),
              body: ListView.builder(
                shrinkWrap: true,
                physics: NeverScrollableScrollPhysics(),
                itemCount: 10,
                itemBuilder: (_, index) => ListTile(
                  leading: Container(
                    height: 40,
                    width: 40,
                    decoration: BoxDecoration(
                        shape: BoxShape.circle, color: Colors.grey),
                    alignment: Alignment.center,
                    child: Text(index.toString()),
                  ),
                  title: Text('List element $index'),
                ),
              )),
        ],
      ),
    );
  }
}

Limitations & Considerations

There are some limitations on this package. For example we only support ScrollView to be the body. Also, we could have used builder pattern to build the widgets.

I would like to thank Google developers for creating awesome package called ScrollablePositionedList.

Contribution

Contributions are accepted via pull requests. For more information about how to contribute to this package, please check the contribution guide.

License

This project is licensed under the MIT license, additional knowledge about the license can be found here.