Dismissible Expanded List

A Flutter package to provide an ability to display hierarchical data in the form of list as well as allows to swipe the individual tiles.

Getting Started

Dismissible Expanded List is written in dart. It provides us an ability to display hierarchical data in the form of list as well as allowing us to swipe the individual tiles. Tapping a tile expands or collapses the view of its children. When a tile is collapsed its children are disposed so that the widget footprint of the list only reflects what’s visible.

User can enable/disable swipe functionality for parent or child items by providing simple configurations. A complete list of configurable params is mentioned below.

Demo

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

dependencies:
  dismissible_expanded_list: ^0.2.x

2. Install it

You can install packages from the command line:

with Flutter

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:dismissible_expanded_list/dismissible_expanded_list.dart';

How to use

Using Dismissible Expanded List is quite easy, all you need to do is

return ListView.builder(
    itemBuilder: (BuildContext context, int index) =>
        DismissibleExpandableList(
      parentIndex: index,
      entry: list[index],
      config: config,
      onItemClick: (parentIndex, childIndex, ExpandableListItem item) {
        print('onItemClick called');
        onItemClick(parentIndex, childIndex);
      },
      onItemDismissed:
          (parentIndex, childIndex, direction, removeTileOnDismiss, item) {
        if (direction == DismissDirection.endToStart) {
          onItemDismissed(parentIndex, childIndex, removeTileOnDismiss);
        } else {
          onItemDismissed(parentIndex, childIndex, removeTileOnDismiss);
        }
      },
    ),
    itemCount: mockData.length,
  );

How to Configure

/// Configuration example
DismissibleListConfig config = DismissibleListConfig()
  ..badgeWidth = 80.0
  ..listElevation = 3.0
  ..infoBadgeElevation = 0.0
  ..infoIconSize = 15.0
  ..removeTileOnDismiss = false
  ..allowBatchSwipe = true
  ..allowChildSwipe = true
  ..allowParentSelection = true
  ..showBorder = false
  ..showInfoBadge = true
  ..titleStyle = TextStyles.title
  ..titleSelectedStyle = TextStyles.titleSelected
  ..subTitleStyle = TextStyles.subTitle
  ..subTitleSelectedStyle = TextStyles.subTitleSelected
  ..trailingIcon = Icons.info_outline
  ..lineColor = Colors.grey[400]
  ..selectionColor = Color(0xFFcee9f0)
  ..rightSwipeColor = Colors.green
  ..leftSwipeColor = Colors.red
  ..iconColor = Colors.black87
  ..iconSelectedColor = Colors.black87
  ..backgroundColor = Colors.white;

List of params

Property	Type	Default Value	Description
badgeWidth	double	80.0	The (optional) param to control badge width displayed at the top right.
infoBadgeElevation	double	0.0	The (optional) param to control the card elevation for info badge displayed at the top right.
listElevation	double	3.0	The (optional) param to control the card elevation for dismissible list item.
infoIconSize	double	15.0	The (optional) param to control the size of info icon displayed in-front of the title.
removeTileOnDismiss	bool	true	The (optional) param to control either to remove dismissible list items from list or to keep them. If true item will be remove from the list and the rest of the items will adjust accordingly, else item will stay at its place and a callback with swiped item will be returned.
allowBatchSwipe	bool	true	The (optional) param to control parent/batch swipe at once. If true parent/batch will be swiped and removed from list, else it wont and will act as a normal list item.
allowChildSwipe	bool	true	The (optional) param to control child swipe. If true user will be able to swipe the child else it won't and will act as a normal list item.
allowParentSelection	bool	true	The (optional) param to control parent selection. If true by selecting a child parent will also be selected else only child will show as selected.
showBorder	bool	false	The (optional) param to add an extra border between expanded and other list items when one of the list item is expanded. If true an extra border will be added to top and bottom of expanded item to distinguish it from other items else there will be no boarder.
showInfoBadge	bool	true	The (optional) param to control either to show info badge or not. if true info badge will be displayed at the top right corner of the dismissible list item.
titleStyle	TextStyle	TextStyles.title	The (optional) param to set font style of the title.
titleSelectedStyle	TextStyle	TextStyles.titleSelected	The (optional) param to set selected font style of the title.
subTitleStyle	TextStyle	TextStyles.subTitle	The (optional) param to set font style of the sub-title.
subTitleSelectedStyle	TextStyle	TextStyles.subTitleSelected	The (optional) param to set selected font style of the sub-title.
trailingIcon	IconData	Icons.info_outline	The (optional) param to set the trailing icon.
topLeftIcon	IconData	Icons.info_outline	The (optional) param to set the icon at the top left corner of the list tile.
bottomLeftIcon	IconData	Icons.info_outline	The (optional) param to set the icon at the bottom left corner of the list tile.
bottomRightIcon	IconData	Icons.info_outline	The (optional) param to set the icon at the bottom right corner of the list tile.
lineColor	Color	Colors.grey[400]	The (optional) param to set the line color of the expanded list item.
selectionColor	Color	Color(0xFFcee9f0)	The (optional) param to set the list item selection color.
rightSwipeColor	Color	Colors.green	The (optional) param to set the swipe color of the list item when swiped from left to right.
leftSwipeColor	Color	Colors.red	The (optional) param to set the swipe color of the list item when swiped from right to left.
iconColor	Color	Colors.black87	The (optional) param to set the trailing icon color.
iconSelectedColor	Color	Colors.black87	The (optional) param to set the trailing icon color when list item is selected.
backgroundColor	Color	Colors.white	The (optional) param to set the background color of list item.
cornerBackgroundColor	Color	Color(0xFFf3f3f3)	The (optional) param to set the background color of corners.
cornerSelectionColor	Color	Color(0xFFf3f3f3)	The (optional) param to set the selection color of corners.
parentIndex	int	null	The (required) param to populate list item data.
entry	ExpandableListItem	null	The (required) param to populate list item data.
config	DismissibleListConfig	null	The (required) param to set the dismissible list item configuration. e.g. background color, trailing icon size etc.
onItemClick	OnItemClick	null	The (optional) param to get the call back whenever list item will be tapped.
onItemDismissed	OnItemDismissed	null	The (optional) param to get the call back whenever list item will be swiped.
icons	List	null	The (optional) param to show info icons under subtitle

Complete Example

import 'package:dismissible_expanded_list/constants/text_styles.dart';
import 'package:dismissible_expanded_list/widgets/dismissible_expanded_list_widget.dart';
import 'package:dismissible_expanded_list/model/entry.dart';
import 'package:example/mock.dart';
import 'package:flutter/material.dart';
import 'package:dismissible_expanded_list/model/dismissible_list_configuration.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: ExpansionTileSample(),
    );
  }
}

class ExpansionTileSample extends StatefulWidget {
  @override
  _ExpansionTileSampleState createState() => _ExpansionTileSampleState();
}

class _ExpansionTileSampleState extends State<ExpansionTileSample> {
  String title = 'Not Yet Selected';
  String selectedId = '1';
  bool removeTileOnDismiss = true;

  final List<ExpandableListItem> list = mockData;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          backgroundColor: Color(0xFF2e6f85),
          title: const Text('ExpansionTile'),
        ),
        body: Material(
          child: MediaQuery.of(context).orientation == Orientation.landscape
              ? Row(
                  children: <Widget>[_buildLeftSide(), _buildRightSide()],
                )
              : Row(
                  children: <Widget>[_buildRightSide()],
                ),
        ),
      ),
    );
  }

  Widget _buildRightSide() {
    /// Configuration example
    DismissibleListConfig config = DismissibleListConfig()
      ..badgeWidth = 80.0
      ..listElevation = 3.0
      ..infoBadgeElevation = 0.0
      ..infoIconSize = 15.0
      ..removeTileOnDismiss = false
      ..allowBatchSwipe = true
      ..allowChildSwipe = true
      ..allowParentSelection = true
      ..showBorder = false
      ..showInfoBadge = true
      ..titleStyle = TextStyles.title
      ..titleSelectedStyle = TextStyles.titleSelected
      ..subTitleStyle = TextStyles.subTitle
      ..subTitleSelectedStyle = TextStyles.subTitleSelected
      ..trailingIcon = Icons.info_outline
      ..lineColor = Colors.grey[400]
      ..selectionColor = Color(0xFFcee9f0)
      ..rightSwipeColor = Colors.green
      ..leftSwipeColor = Colors.red
      ..iconColor = Colors.black87
      ..iconSelectedColor = Colors.black87
      ..backgroundColor = Colors.white;

    return Expanded(
      flex: 1,
      child: ListView.builder(
        itemBuilder: (BuildContext context, int index) =>
            DismissibleExpandableList(
          parentIndex: index,
          entry: list[index],
          config: config,
          onItemClick: (parentIndex, childIndex, ExpandableListItem item) {
            print('onItemClick called');
            onItemClick(parentIndex, childIndex);
          },
          onItemDismissed:
              (parentIndex, childIndex, direction, removeTileOnDismiss, item) {
            if (direction == DismissDirection.endToStart) {
              onItemDismissed(parentIndex, childIndex, removeTileOnDismiss);
            } else {
              onItemDismissed(parentIndex, childIndex, removeTileOnDismiss);
            }
          },
        ),
        itemCount: mockData.length,
      ),
    );
  }

  Widget _buildLeftSide() {
    return Expanded(
      flex: 2,
      child: Container(
        margin: EdgeInsets.only(left: 5.0, top: 5.0, bottom: 5.0, right: 2.0),
        height: double.infinity,
        decoration: BoxDecoration(
            color: Colors.white, borderRadius: BorderRadius.circular(10.0)),
        child: Text(title),
      ),
    );
  }

  // general methods:-----------------------------------------------------------
  void onItemClick(int parentIndex, int childIndex) {
    setState(
      () {
        if (childIndex == -1) {
          title = mockData[parentIndex].title;
          selectedId = mockData[parentIndex].id;

          // setting entry to true
          mockData.forEach((item) => item.reset());
          mockData[parentIndex].selected = true;
        } else {
          selectedId = mockData[parentIndex].children[childIndex].id;
          title = mockData[parentIndex].children[childIndex].title;

          // setting entry to true
          mockData.forEach((item) => item.reset());
          mockData[parentIndex].selected = true;
          mockData[parentIndex].children[childIndex].selected = true;
        }
      },
    );
  }

  void onItemDismissed(
      int parentIndex, int childIndex, bool removeTileOnDismiss) {
    setState(
      () {
        // check to see if user wants to remove swiped items from list
        // if yes then remove item from list
        // else show user a message about swiped item
        if (removeTileOnDismiss) {
          if (childIndex == -1) {
            mockData.removeAt(parentIndex);
          } else {
            // check to see if its the last child
            // if yes, then remove parent as well
            // else, only remove child
            if (mockData[parentIndex].children != null &&
                mockData[parentIndex].children.length > 1) {
              mockData[parentIndex].children.removeAt(childIndex);
            } else {
              mockData.removeAt(parentIndex);
            }
          }
        } else {
          // show user a message that item has been swiped
        }
      },
    );
  }
}