Scroll To Index

• A Project for Listview element scroll to current index.
• It allows scrolling to a specific index programmatically.
• It's configured to scroll to index 10 with a duration of 0.2 seconds. You can modify the index and duration according to your requirements.
• PreferPosition set value 0 to 1.0 ( 0 = controller scroll to screen of top, 0.5 = controller scroll to screen of center and 1 = controller scroll to screen of bottom )

⠀ ⠀

import 'dart:math';

import 'package:flutter/material.dart';
import 'dart:math' as math;

import 'package:scroll_to_position/scroll_to_position.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  AutoScrollController scrollController = AutoScrollController();

  @override
  void initState() {
    super.initState();
    scrollController = AutoScrollController(
      viewportBoundaryGetter: () =>
          Rect.fromLTRB(0, 0, 0, MediaQuery.of(context).padding.bottom),
      axis: Axis.vertical,
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ListView.builder(
        controller: scrollController,
        shrinkWrap: true,
        itemCount: 20,
        itemBuilder: (context, index) {
          return AutoScrollTag(
            key: ValueKey(index),
            controller: scrollController,
            index: index,
            child: Container(
              height: 250,
              color:
                  Colors.primaries[Random().nextInt(Colors.primaries.length)],
              child: Center(
                child: Text(
                  '$index',
                  style: const TextStyle(
                    fontSize: 25,
                  ),
                ),
              ),
            ),
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          scrollController.scrollToIndex(
            10,
            0.2,
          );
        },
      ),
    );
  }
}