flutter_index_widget

screenshot

img

custom index

use

add pubspec.yaml

dependencies:
  flutter_index_widget: ^0.1.0

import library

import 'package:flutter_index_widget/flutter_index_widget.dart';

use widget

default

    Widget widget = IndexWidget(
        width: 25.0,
        indexTouchChange: (int index) {
            setState(() {
                _text = defaultEntries[index].text; //get the entry and text
            });
        },
        indexTouchStateChange: (bool down) {
            setState(() {
                if (down) {
                    _state = "touch down";
                } else {
                    _state = "touch up";
                }
            });
        },
    ),

custom index text

  List<IndexEntry> list = [];

  @override
  void initState() {
    super.initState();
    for (var i = 10; i >= 0; i--) {
      list.add(IndexEntry(text: "$i", desc: i.toString()));
    }
  }

   Container(
        child: IndexWidget(
        entries: list,
        width: 25.0,
        indexTouchChange: (int index) {
            setState(() {
                _index = index;
                _text = list[index].text;
            });
        },
        indexTouchStateChange: (bool down) {
                setState(() {
                    if (down) {
                        _state = "touch down";
                    } else {
                        _state = "touch up";
                    }
                });
            },
        ),
    ),  

Libraries

flutter_index_widget

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]