React Native Multiselect Sortable FlatList

A React Native FlatList that is sortable with the ability to select multiple list items.

Getting started

Install

npm install react-native-multiselect-sortable-flatlist --save

or

yarn add react-native-multiselect-sortable-flatlist

Usage

import MultiSelectSortableFlatlist from 'react-native-multiselect-sortable-flatlist';

Examples

Simple Example (Minimum needed for component to work)

<MultiSelectSortableFlatlist
  data={this.state.ListData}
  keyExtractor={(item, index) => item}
  onSort={data => this.onSort(data)}
  renderItem={({ item, index, selected }) => (
    //Note: To view selection changes, your component should take a prop that will render changes based on "selected" bool
    <View style={selected ? styles.selectedWrapper : styles.wrapper}>
      <View
        style={[
          styles.containerStyle,
          {
            borderColor: selected ? 'blue' : 'white',
            borderWidth: selected ? 1.5 : 0,
          },
        ]}>
        <Text style={styles.CardText}>{item}</Text>
      </View>
    </View>
  )}
/>

Advance Example

import React from 'react';
import { Alert, Text, StyleSheet, StatusBar } from 'react-native';
import { widthPercentageToDP as wp, heightPercentageToDP as hp } from 'react-native-responsive-screen';
import SelectableCard from './compoenents/SelectableCard';
import Header from './compoenents/Header';
import MultiSelectSortableFlatlist from 'react-native-multiselect-sortable-flatlist';

export default class App extends React.PureComponent {
 constructor(props) {
   super(props);
   this.state = {
     ListData: ['A', 'B', 'C', 'D', 'E', 'F', 'G'],
     ItemsSelected: [],
   };
 }

 onItemPress(item) {
   Alert.alert('Alert', item + ' Pressed', [{ text: 'OK', onPress: () => console.log('OK Pressed') }], {
     cancelable: true,
   });
 }

 onSelectionChanged(selectedItems) {
   this.setState({ ItemsSelected: selectedItems });
 }

 onSort(newListDataArray) {
   this.setState({ ListData: newListDataArray });
 }

 render() {
   return (
     <MultiSelectSortableFlatlist
       ref={MultiSelectSortableFlatlist => (this.MultiSelectSortableFlatlist = MultiSelectSortableFlatlist)}
       contentContainerStyle={styles.ListContainer}
       ListHeaderComponentStyle={styles.HeaderStyle}
       ListHeaderComponent={
         <Header
           SelectAll={() => this.MultiSelectSortableFlatlist.SelectAll()}
           DeselectAll={() => this.MultiSelectSortableFlatlist.DeselectAll()}
         />
       }
       data={this.state.ListData}
       keyExtractor={(item, index) => item}
       onItemTap={({ item, index }) => this.onItemPress(item)}
       onItemSelected={({ selectedItems, item, index }) => this.onSelectionChanged(selectedItems)}
       onItemDeselected={({ selectedItems, item, index }) => this.onSelectionChanged(selectedItems)}
       onSort={data => this.onSort(data)}
       renderItem={({ item, index, selected }) => (
         //Note: To view selection changes, your component should take a prop that will render changes based on "selected" bool
         <SelectableCard Selected={selected}>
           <Text style={styles.CardText}>{item}</Text>
         </SelectableCard>
       )}
     />
   );
 }
}

const styles = StyleSheet.create({
 ListContainer: {
   paddingTop: StatusBar.currentHeight + hp(2),
 },
 CardText: {
   textAlign: 'center',
 },
 HeaderStyle: {
   paddingHorizontal: wp(4),
 },
});

Manual Mode Example

import React from 'react';
import { Alert, View, Text, StyleSheet, StatusBar, TouchableWithoutFeedback } from 'react-native';
import { widthPercentageToDP as wp, heightPercentageToDP as hp } from 'react-native-responsive-screen';
import SelectableCard from './compoenents/SelectableCard';
import Header from './compoenents/Header';
import MultiSelectSortableFlatlist from 'react-native-multiselect-sortable-flatlist';

export default class App extends React.PureComponent {
  constructor(props) {
    super(props);
    this.state = {
      ListData: ['A', 'B', 'C', 'D', 'E', 'F', 'G'],
      ItemsSelected: [],
    };
  }

  onItemPress(item) {
    Alert.alert('Alert', item + ' Pressed', [{ text: 'OK' }], {
      cancelable: true,
    });
  }

  onSelectionChanged(selectedItems) {
    this.setState({ ItemsSelected: selectedItems });
  }

  onSort(newListDataArray) {
    this.setState({ ListData: newListDataArray });
  }

  render() {
    return (
      <MultiSelectSortableFlatlist
        ref={MultiSelectSortableFlatlist => (this.MultiSelectSortableFlatlist = MultiSelectSortableFlatlist)}
        contentContainerStyle={styles.ListContainer}
        ListHeaderComponentStyle={styles.HeaderStyle}
        ListHeaderComponent={
          <Header
            SelectAll={() => this.MultiSelectSortableFlatlist.SelectAll()}
            DeselectAll={() => this.MultiSelectSortableFlatlist.DeselectAll()}
          />
        }
        mode="manual"
        data={this.state.ListData}
        keyExtractor={(item, index) => item}
        onItemSelected={({ selectedItems, item, index }) => this.onSelectionChanged(selectedItems)}
        onItemDeselected={({ selectedItems, item, index }) => this.onSelectionChanged(selectedItems)}
        onSort={data => this.onSort(data)}
        renderItem={({ item, index, selected, drag, dragEnd, reverseSelection }) => (
          //Create your Touchable component and control both selectability and sortability through exposed functions.
          <TouchableWithoutFeedback
            onPress={() => reverseSelection()}
            onLongPress={() => drag()}
            onPressOut={() => dragEnd()}>
            <View>
              <SelectableCard Selected={selected}>
                <Text style={styles.CardText}>{item}</Text>
              </SelectableCard>
            </View>
          </TouchableWithoutFeedback>
        )}
      />
    );
  }
}

const styles = StyleSheet.create({
  ListContainer: {
    paddingTop: StatusBar.currentHeight + hp(2),
  },
  CardText: {
    textAlign: 'center',
  },
  HeaderStyle: {
    paddingHorizontal: wp(4),
  },
});

Mobile Usage

Auto Mode

• Tap on your item to get onItemTap called.
• Press and hold on an item to start selecting phase.
  • After activating selecting phase, tap on any other item to select.
  • Tapping on a selected item will deselect that item.
  • Deselecting all items will stop selecting phase
• Press and hold on an item and drag to move it.
  • Drop the item anywhere to sort.

Manual Mode

• All controls are managed by calling exposed functions for each item in the renderItem prop.
  • Changing mode prop to "manual" will stop all Auto mode controls.

API

Props

| Name | Description | Default | Type | |--|--|--|--| | data | Exaxtly like react-native FlatList data prop. An array of data to pass your rendered components. | None (Required) | Array | | renderItem | renderItem={({ item: object, index: number, selected: bool }) => <YourComponent selected={selected} />}. Similar to react-native FlatList renderItem, it provides both the item and index varables along with a new varable called selected, which allows you to provide conditional rendering as you see fit. | None (Required) | Func | | keyExtractor | Exaxtly like react-native FlatList keyExtractor prop. Used to extract a unique key for a given item at the specified index. Also import to give unique key for selection to differentiate each item.| None (Required) | Func | | initialSelectedItems | An array of items that will be selected when component mounts. | None | Array | | onItemTap | ({ item: object, index: number }) => void Called when the touch is released. | None | Func | | onItemSelected | ({ selectedItems: array, item: object, index: number }) => void Called when items are selected. | None | Func | | onItemDeselected | ({ selectedItems: array, item: object, index: number }) => void Called when items are deselected. | None | Func | | onSort | (data => void) Called when list is resorted with same data in new array data. | None | Func | | comparingFactor | If data prop is an array of JSON Objects, you can pass a JSON key that would use the value for uniquely differentiating each item instead of using the item index number. | None | String | | selectable | Enable or Disable all list items from being selected. | true | Bool | | sortable | Enable or Disable list sorting ability. | true | Bool | | scrollPercent | Sets where scrolling begins. A value of 5 will scroll up if the finger is in the top 5% of the FlatList container and scroll down in the bottom 5%. | 5 | Number | | mode | Setting the mode to "manual" gives you full control on both sortability and selectability by exposing methods per item though the renderItem prop. When set to manual, the renderItem prop will look like this: renderItem={({ item: object, index: number, selected: bool, drag: function, dragEnd: function, reverseSelection: function }). Manual mode will ignore selectable, sortable and onItemTap props. | "auto" | String |

All FlatList props are available too as the underlying component is a FlatList

renderItem Prop Variables

| Name | Description | Type | |--|--|--| | item | The item from data being rendered. | Object | | index | The index corresponding to this item in the data array. | Number | | selected | If selection is active on the item. | Bool | | drag | Call this to start dragging the process on the current item. The item will follow the finger till dragEnd is called. | Func | | dragEnd | Call this to end dragging and sort the list. | Func | | reverseSelection | Call this to reverse the current selection of the item. If selected, item will become unselected and if unselected, item will become selected. | Func |

Functions

Use refs to call the functions on an instance of the component.

| Name | Params |Description | Returns | |--|--|--|--| | SelectAll() | None |Selects all of the items in the list and returns an array. | Array | | DeselectAll() | None |Deselects all of the items in the list and returns an array. | Array | | SelectionOverwrite() | SelectedItems: array |Manually overwrite the current selection array with your own selection array with items passed to data. | Null |

Running the example expo app

1. git clone https://github.com/yoeven/react-native-multiselect-sortable-flatlist.git
2. cd react-native-multiselect-sortable-flatlist/examples
3. npm install or yarn
4. npm start or yarn start

How to contribute

Check out this simple tutorial

• Use prettier to format all code by running yarn run format.
• Test code locally by using examples project with expo or your project before requesting for a pull request.

How to test locally

1. After making changes to the project code, cd into the root of the project
2. Run npm pack which will build a package file with an extension .tgz
3. Now cd into your react-native project folder or the examples expo project folder and run yarn add <filename>.tgz or npm install <filename>.tgz
4. Run your project and test it works
5. If you are installing the package with the same version number, yarn and npm install the cached version instead, use yarn cache clean before adding the package into your project

TODO

• [x] Expose functions for manual select and sort
• [ ] Create version 2.0.0 with react-native-draggable-flatlist ^2.0.0 as sorting base for better perfomance.