A multi select component with support for sub categories

react-native-sectioned-multi-select

A multi (or single) select component with support for sub categories, search, chips. It's intended for long-ish lists, as it opens in a Modal (I might make this optional in the future).

This is based on https://github.com/toystars/react-native-multiple-select. The problems I had were that I needed it to be in a modal, because of nested ScrollViews not working on Android, and I needed to display categories with sub-categories.

Usage

npm i -S react-native-sectioned-multi-select

react-native-vector-icons package is required, set it up if you haven't already.

Required props:
items | array
uniqueKey | string
onSelectedItemsChange | function

import React, { Component } from 'react';
import {
  View
} from 'react-native';
import SectionedMultiSelect from 'react-native-sectioned-multi-select';

const items = [
  {  
    name: "Fruits",
    id: 0,
    children: [{
        name: "Apple",
        id: 10,
      },{
        name: "Strawberry",
        id: 17,
      },{
        name: "Pineapple",
        id: 13,
      },{
        name: "Banana",
        id: 14,
      },{
        name: "Watermelon",
        id: 15,
      },{
        name: "Kiwi fruit",
        id: 16,
      }]
  },
  {
    name: "Gems",
    id: 1,
    children: [{
        name: "Quartz",
        id: 20,
      },{
        name: "Zircon",
        id: 21,
      },{
        name: "Sapphire",
        id: 22,
      },{
        name: "Topaz",
        id: 23,
      }]
  },
  {
    name: "Plants",
    id: 2,
    children: [{
        name: "Mother In Law\'s Tongue",
        id: 30,
      },{
        name: "Yucca",
        id: 31,
      },{
        name: "Monsteria",
        id: 32,
      },{
        name: "Palm",
        id: 33,
      }]
  },
]

export default class App extends Component {
  constructor(){
    super()
    this.state = {
      selectedItems: [],
    }
  }
  onSelectedItemsChange = (selectedItems) => {
    this.setState({ selectedItems });
  }

  render() {
    return (
      <View>
      
        <SectionedMultiSelect
          items={items} 
          uniqueKey='id'
          subKey='children'
          selectText='Choose some things...'
          showDropDowns={true}
          readOnlyHeadings={true}
          onSelectedItemsChange={this.onSelectedItemsChange}
          selectedItems={this.state.selectedItems}
        />

      </View>
    );
  }
}

You can programatically remove all items by setting up a ref to the component:

<SectionedMultiSelect
    ...
    ref={SectionedMultiSelect => this.SectionedMultiSelect = SectionedMultiSelect}
/>

and then use the _removeAllItems function:

onPress={() => this.SectionedMultiSelect._removeAllItems()}

You can open the modal programatically with the _toggleSelector() method:

onPress={() => this.SectionedMultiSelect._toggleSelector()}

Items

Your items should have a uniqueKey(default: 'id') and a displayKey (default: 'name').
Any child items of that item should be in subKey, and they will have uniqueKey and displayKey properties. As you can see from the example above, my items all have a unique id property and the child items is an array within the subKey property.

Sub categories are optional, there's no need to have subKey items if you don't want to.

Props

Props, there are lots.

Main

Prop	Default	type	Desc
uniqueKey	'id'	string	the unique key for your items
subKey	'sub'	string	the array of sub items within items
displayKey	'name'	string	the key for the display name / title of the item
selectedItems	[]	array	the selected items
onSelectedItemsChange		function	function that runs when an item is toggled
onSelectedItemObjectsChange		function	function that returns the selected items as their original objects instead of an array of ids
onCancel		function	function that runs when the confirm button is pressed
onConfirm		function	function that runs when the cancel button is pressed

Options

Prop	Default	type	Desc
single	false	bool	allow only one selection
showDropDowns	true	bool	whether to allow dropdown toggles to show/hide the sub items (if false, sub items are always shown)
showChips	true	bool	whether to show the chips of the selected items
hideSelect	false	bool	hide the select component
showCancelButton	false	bool	Show a cancel button next to the confirm button. Dismisses modal and removes all selected items.
readOnlyHeadings	false	bool	whether the parent items can be pressed or not. If true and showDropdowns is true, pressing the parent item will toggle the dropdown
hideSearch	false	bool	hide the search bar entirely
selectChildren	false	bool	if true, selecting a parent item will automatically select its children
highlightChildren	false	bool	if true, selecting a parent item will automatically highlight its children (but the child ids won't be broadcast to the selectedItems state)
showRemoveAll	false	bool	Whether to show a Remove all chip at the beginning of the selected items chips
modalSupportedOrientations	['landscape', 'portrait']	array	The supportedOrientations of the Modal
modalAnimationType	'fade'	string	The animation type of the Modal (fade or slide)

Customization

Prop	Default	type	Desc
selectText	'Select'	string	the text for the select component
confirmText	'Confirm'	string	the text for the confirm button
selectedText	'selected'	string OR function	the text that follows the number of items selected
searchPlaceholderText	'Search categories...'	string	the placeholder text for the search input
removeAllText	'Remove all'	string	Text for optional remove all button
noResultsComponent	<Text>Sorry, no results</Text>	object	the component to display when the search results are empty
loadingComponent	<View style={{marginTop:20, alignItems:'center', justifyContent:'center'}}> <ActivityIndicator/> </View>	object	the component to display when the items are empty
selectToggleIconComponent	Material keyboard-arrow-down	object	The icon to the right of the dropdown in its initial state )
searchIconComponent	Material search	object	The search input icon (default Magnifying glass)
selectedIconComponent	Material check	object	The icon to the left of the selected item (default Checkmark)
dropDownToggleIconUpComponent	Material keyboard-arrow-up	object	The parent dropdown icon in closed state
dropDownToggleIconDownComponent	Material keyboard-arrow-down	object	The parent dropdown icon in opened state
cancelIconComponent	Material cancel	object	The cancel button's inner component
styles	{}	object	Styles object - see styles section
colors	{...}	object	colors object - see colors section
itemFontFamily	Avenir / normal - bold	object	font family for the parent items. Can be a regular style object
subItemFontFamily	Avenir / normal - 200	object	font family for the sub items. Can be a regular style object
searchTextFontFamily	Avenir / normal - 200	object	font family for the search input. Can be a regular style object
confirmFontFamily	Avenir / normal - bold	object	font family for the confirm button.
numberOfLines	null	number	numberOfLines for label text

Colors

You can pass a colors object to theme it how you like.

These are the available colors and their defaults:

Name	Default	Description
primary	#3f51b5	used for the dropdown toggle icon, the no results text and the background of the confirm button.
success	#4caf50	used for the selected checkmark icon.
cancel	#1A1A1A	used for the cancel button background
text	#2e2e2e	Parent item text color
subText	#848787	Sub item text color
selectToggleTextColor	#333	Select button text color
searchPlaceholderTextColor	#999	Search input placeholder text color
searchSelectionColor	rgba(0,0,0,0.2)	Search input text selection color
itemBackground	#fff	parent item background color
subItemBackground	#ffffff	sub item background color
chipColor	#848787	chip color
disabled	#d7d7d7	Selected icon color for sub items when highlight children is used

Styles

You can pass a styles object to style it how you like.

These are the styles you can change:
container
listContainer
selectToggle
selectToggleText
item
subItem
itemText
subItemText
searchBar
center
separator
subSeparator
chipContainer
chipText
chipIcon
searchTextInput
scrollView
button
confirmText
selectedItem
cancelButton

GitHub