vertical_scrollable_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.

exposes Scrollbar and CustomScrollView parameters to VerticalScrollableTabView

Demo

Installation

Add dependency for package on your pubspec.yaml:

dependencies:
    vertical_scrollable_tabview: <latest>
    scroll_to_index: <latest>

Usage

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

VerticalScrollableTabView

you need to implement TabController and AutoScrollController

Import Parameter :point_down:

Parameter Definition
autoScrollController Scrollbar's controller and CustomScrollView's controller.
tabController Trailing widget for a tab, typically an TabController.
listItemData It must be List< dynamic > Type
eachItemChild A item child that in ListView.Builder, First parameter is an object that you put in listItemData, Second parameter is the index in ListView.Builder
verticalScrollPosition A Item Position
TabBar A TabBar, That required in sliversSliverAppbar(bottom:TabBar())

Copy parameters from Scrollbar

Parameter Definition ( parameter from Scrollbar )
scrollbarThumbVisibility thumbVisibility
scrollbarTrackVisibility trackVisibility
scrollbarThickness thickness
scrollbarRadius radius
scrollbarNotificationPredicate notificationPredicate
scrollInteractive interactive
scrollbarOrientation scrollbarOrientation

Copy parameters from CustomScrollView

Parameter Definition ( parameter from CustomScrollView )
scrollDirection scrollDirection
reverse reverse
primary primary
physics physics
scrollBehavior scrollBehavior
shrinkWrap shrinkWrap
center center
anchor anchor
cacheExtent cacheExtent
slivers slivers
semanticChildCount semanticChildCount
dragStartBehavior dragStartBehavior
keyboardDismissBehavior keyboardDismissBehavior
restorationId restorationId
clipBehavior clipBehavior

Example

** IMPORTANT** DON'T FORGET IMPLEMENT TabController and AutoScrollController

import 'package:vertical_scrollable_tabview/vertical_scrollable_tabview.dart';
VerticalScrollableTabView(
    autoScrollController: autoScrollController,          <- Required AutoScrollController
    tabController: tabController,                        <- Required TabBarController
    listItemData: data,<- Required List<dynamic>
    verticalScrollPosition: VerticalScrollPosition.begin,
    eachItemChild: (object, index) =>
        CategorySection(category: object as Category),    <- Object and index
    slivers: [                                            <- Required slivers 
      SliverAppBar(                                       <- Required SliverAppBar 
        bottom: TabBar(
          isScrollable: true,
          controller: tabController,
          indicatorPadding: const EdgeInsets.symmetric(horizontal: 16.0),
          indicatorColor: Colors.cyan,
          labelColor: Colors.cyan,
          unselectedLabelColor: Colors.white,
          indicatorWeight: 3.0,
          tabs: data.map((e) {
            return Tab(text: e.title);
          }).toList(),
          onTap: (index) {
            VerticalScrollableTabBarStatus.setIndex(index);  <- Required
          },
        ),
      ),
    ],
  ),

for full example, please see this Demo.

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.

Libraries

vertical_scrollable_tabview
vertical_scrollable_tabview_web