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Description:

scrollable list tab scroller

scrollable_list_tab_scroller #
Customizable Flutter widget that synchronizes a scrollable list of grouped items with tabs.
Create custom tabs that synchronize with inner ScrollView. The tabs follow the index of scroll view and vice-versa.

Installation #
Add dependency for package on your pubspec.yaml:
dependencies:
scrollable_list_tab_scroller: <latest>
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Usage #
To use this widget we must first define how our tabs will look like.
ScrollableListTabScroller #

Parameter
Definition

int itemCount
Quantity item that will be built.

IndexedWidgetBuilder itemBuilder
Builder of list item.

IndexedActiveStatusWidgetBuilder tabBuilder
Builder of tab with active status for customization.

HeaderContainerBuilder? headerContainerBuilder
Optional header container builder for customization.

BodyContainerBuilder? bodyContainerBuilder
Optional body container builder for customization.

ItemScrollController? itemScrollController
Optional controller for item list.

ItemPositionsListener? itemPositionsListener
Optional listener of item list positions.

void Function(int)? tabChanged
Optional listener of tab changes.

double earlyChangePositionOffset
Optional vertical offset to change the index before the list item reaches the edge(default = 0).

Duration animationDuration
Optional animation duration

rest of the parameters
Optional scrollable_positioned_list's parameters

If you don't want to build your own HeaderContainer with a builder, you can instead use the ScrollableListTabScroller.defaultComponents() constructor, which provides additional properties for customizing the default header container and tab bar.
Example #
import 'package:flutter/material.dart';
import 'package:scrollable_list_tab_scroller/scrollable_list_tab_scroller.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: 'Scrollable List Tab Scroller',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Scrollable List Tab Scroller'),
);
}
}

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

final String title;

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

class _MyHomePageState extends State<MyHomePage> {
final data = {
"Category A": [
"Item 1 (A)",
"Item 2 (A)",
"Item 3 (A)",
"Item 4 (A)",
],
"Category B": [
"Item 1 (B)",
"Item 2 (B)",
],
"Category C": [
"Item 1 (C)",
"Item 2 (C)",
"Item 3 (C)",
"Item 4 (C)",
"Item 5 (C)",
],
"Category D": [
"Item 1 (D)",
"Item 2 (D)",
"Item 3 (D)",
"Item 4 (D)",
"Item 5 (D)",
"Item 6 (D)",
"Item 7 (D)",
"Item 8 (D)",
"Item 9 (D)",
],
};

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: ScrollableListTabScroller(
itemCount: data.length,
tabBuilder: (BuildContext context, int index, bool active) => Padding(
padding: EdgeInsets.symmetric(horizontal: 10),
child: Text(
data.keys.elementAt(index),
style: !active
? null
: TextStyle(fontWeight: FontWeight.bold, color: Colors.green),
),
),
itemBuilder: (BuildContext context, int index) => Column(
children: [
Text(
data.keys.elementAt(index),
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20),
),
...data.values
.elementAt(index)
.asMap()
.map(
(index, value) => MapEntry(
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(value),
),
),
)
.values
],
),
),
);
}
}
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License #
This project is licensed under the MIT license, additional knowledge about the license can be found here.