roller_list 0.5.3

A list widget that works similar to rollers: endlessly scrolling over limited set of items.

roller_list package

This widget is a list of values distributed in a circle. The main rules of the list are: a user could scroll it in one direction endlessly, list values are limited and repeated in the same order over and over again. Possible usage scheme: -time selection -piano notes selection -choice of any limited number of items, where it is not important what should go first and what should go last.

Example

You can check Flutter for web build here Or see how it looks like on iphone:

How to use

In the dependencies: section of your pubspec.yaml, add the following line:

roller_list: <latest version>

Then import this class:

import 'package:roller_list/roller_list.dart';

And add your list like this (with only programmatical scroll):

RollerList(
 items: slots,
 enabled: false,
 key: leftRoller,
)

Or like this (with enabled scroll):

RollerList(
  items: months,
  onSelectedIndexChanged: _changeMonths,
  initialIndex: 1,
)

where months is a list of widgets:

static const MONTHS = {
    "January": 31,
    "February": 29,
    "March": 31,
    "April": 30,
    "May": 31,
    "June": 30,
    "July": 31,
    "August": 31,
    "September": 30,
    "October": 31,
    "November": 30,
    "December": 31
  };

final List<Widget> months = MONTHS.keys
  .map((month) => Padding(
        padding: EdgeInsets.all(12.0),
        child: Text(
          month,
          textScaleFactor: 1.3,
          textAlign: TextAlign.center,
        ),
      ))
  .toList();

and _changeMonths will show the selection result somewhere in the widget tree:

void _changeMonths(int value) {
    setState(() {
      selectedMonth = MONTHS.keys.toList()[value];
    });
}