draggable_list 0.0.3

A customizable draggable list view for Flutter.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:draggable_list/draggable_list.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        scaffoldBackgroundColor: Colors.white,
        appBarTheme: const AppBarTheme(
          foregroundColor: Colors.black,
          backgroundColor: Colors.white,
          elevation: 0,
        ),
      ),
      home: Scaffold(
        appBar: AppBar(title: const Text('Draggable List Example')),
        body: MyDraggableList(),
      ),
    );
  }
}

class MyDraggableList extends StatefulWidget {
  @override
  _MyDraggableListState createState() => _MyDraggableListState();
}

class _MyDraggableListState extends State<MyDraggableList> {
  late ListController listController;
  late List<ListModel> listValues;
  final ListStyle listStyle = ListStyle(
    backgroundColor: Colors.white,
    borderRadius: BorderRadius.circular(8.0),
    border: Border.all(
      color: Colors.grey,
      width: 0.5,
      style: BorderStyle.solid,
    ),
    contentTextStyle: const TextStyle(
      decorationThickness: 0,
      color: Colors.black,
      fontSize: 14,
      fontFamily: 'Pretendard',
      fontWeight: FontWeight.w500,
      height: 1.43,
    ),
    hintTextStyle: const TextStyle(
      decorationThickness: 0,
      color: Color(0xffADB5BD),
      fontSize: 14,
      fontFamily: 'Pretendard',
      fontWeight: FontWeight.w500,
      height: 1.43,
    ),
    hintText: '내용',
    listPadding: const EdgeInsets.symmetric(vertical: 2.0),
    textPadding: const EdgeInsets.only(top: 20.0, bottom: 20.0, left: 16.0),
    animateBeginScale: 1.0,
    animateEndScale: 1.2,
    deleteIcon: const Icon(
      Icons.cancel,
      color: Color(0xFF212529),
      size: 18.0,
    ),
  );
  bool canWrite = true;
  List<String> contents = ['example 1', 'example 2', 'example 3'];

  @override
  void initState() {
    super.initState();

    listValues = List.generate(
      contents.length,
      (index) => ListModel(
        listOrder: index,
        listContent: contents[index],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Padding(
        padding: const EdgeInsets.symmetric(vertical: 20.0, horizontal: 16),
        child: DraggableList(
          initListValues: listValues,
          canWrite: canWrite,
          enableDrag: true,
          duration: const Duration(milliseconds: 100),
          initializeController: ((controller) {
            listController = controller;
          }),
          child: Column(
            children: [
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 6.0),
                    child: ElevatedButton(
                      onPressed: () {
                        listController.addList();
                      },
                      child: const Text('Add list'),
                    ),
                  ),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 6.0),
                    child: ElevatedButton(
                      onPressed: () {
                        listController.removeList(
                            listController.draggableLists.value.length - 1);
                      },
                      child: const Text('Delete list'),
                    ),
                  ),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 6.0),
                    child: ElevatedButton(
                      onPressed: () {
                        List<ListModel> finalLists =
                            listController.draggableLists.value;
                        List<String> contentList = finalLists
                            .map((item) => item.listContent ?? "")
                            .toList();

                        String contentString =
                            contentList.map((item) => item).join(", ");
                        ScaffoldMessenger.of(context).showSnackBar(
                          SnackBar(
                            content: Text(contentString),
                          ),
                        );
                      },
                      child: const Text('Save list'),
                    ),
                  ),
                ],
              ),
              Padding(
                padding: const EdgeInsets.symmetric(vertical: 20.0),
                child: ListBuilder(
                  style: listStyle,
                  customListBuilder: (context, index) {
                    return Padding(
                        key: ValueKey(index),
                        padding: const EdgeInsets.all(8.0),
                        child: Container(
                          height: 100,
                          width: 50,
                          decoration: BoxDecoration(
                            color: Color(0xffFFBE98),
                            borderRadius: BorderRadius.circular(12.0),
                            boxShadow: [
                              BoxShadow(
                                color: Colors.black.withOpacity(0.2),
                                blurRadius: 6.0,
                                spreadRadius: 2.0,
                                offset: Offset(0, 4),
                              ),
                            ],
                          ),
                          margin: const EdgeInsets.only(right: 8.0),
                          child: Center(
                            child: Text(
                              'Customized lists $index',
                              style: const TextStyle(
                                color: Colors.black,
                                fontSize: 18,
                                fontWeight: FontWeight.w600,
                              ),
                            ),
                          ),
                        ));
                  },
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}