PageView widget in vertical wrapped in Scrollbar Widget - flutter

Question

I'm trying to implement a list of image arranged in a column vertically. I used PageView Widget to make use of the PageChange listener to indicate what current page I currently am. However I am implementing this in WebView as well so I need to wrap it in ScrollBar. Although the Scrollbar is showing and moving accordingly, it is not draggable or not automatically scrolling if I used the ScrollBar. Is theres a work around this or a solution?

Answer 1

You have to pass the controller for the Scrollbar widget with the same controller of PageView widget.
Define a PageController
final PageController pageController = PageController(initialPage: 0);
Pass the pageController to the controller property of Scrollbar widget.
return Scrollbar(
controller: pageController,
isAlwaysShown: true, // This forces the scrollbar to be visible always
child: PageView(
scrollDirection: Axis.vertical,
controller: pageController,
You can set other properties like thickness and hoverthickness to addjust the thickness of the scroll bar. Refer this youtube video and documentation for more details.
A working demo. Also available as a dartpad here:
/// Flutter code sample for PageView
// Here is an example of [PageView]. It creates a centered [Text] in each of the three pages
// which scroll horizontally.
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
/// This is the main application widget.
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
static const String _title = 'Flutter Code Sample';
#override
Widget build(BuildContext context) {
return MaterialApp(
title: _title,
home: Scaffold(
appBar: AppBar(title: const Text(_title)),
body: const MyStatelessWidget(),
),
);
}
}
/// This is the stateless widget that the main application instantiates.
class MyStatelessWidget extends StatelessWidget {
const MyStatelessWidget({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
final PageController pageController = PageController(initialPage: 0);
return Scrollbar(
controller: pageController,
isAlwaysShown: true,
thickness: 10,
showTrackOnHover: true,
hoverThickness: 15,
radius: Radius.circular(0),
child: PageView(
scrollDirection: Axis.vertical,
controller: pageController,
children: const <Widget>[
Center(
child: Text('First Page'),
),
Center(
child: Text('Second Page'),
),
Center(
child: Text('Third Page'),
)
],
),
);
}
}