newton-checkbox-tree

Overview

Newton Checkbox Tree component renders a tree of items that contain configurable checkboxes, icons, labels and events. The component is extensible and customizable at the global and individual node level. The style used within the component is implemented with IBM Carbon Design System framework.

The build, test, serve, package and deploy tasks use modern tooling and practices with Parcel, Jest, Enzyme, Storybook and Babel. All of the tasks are extrememly simple to execute which allows for excellent development environment.

This component is part of the Newton Component family. Eventually it will be moved into the Newton Common Component library.

DEVELOPMENT

SETUP DEVELOPMENT ENVIRONMENT

Quick overview for getting your local development environment setup for development, browsing and publishing. Below are all of the commands needed to build, test, run and publish the component.

CLONE REPOSITORY

git clone https://github.com/ryan-rocketsoftware/newton-checkbox-tree.git

COMMANDS

• clean - Deletes dist, demo, build, cache and storybook folders
• clean:dist - Deletes dist folder
• clean:demo - Deletes demo folder
• clean:build - Deletes build folder
• clean:cache - Deletes cache folder
• clean:storybook - Deletes storybook folder
• start:demo - Run demo in the browser
• build:demo - Bundle demo application
• publish:demo - Deploy demo to gh-pages branch
• build - Transpile scss and javascript for production
• build:css - Transpile scss to css for production
• build:commonjs - Transpile javascript to commonjs for production
• build:esmodules - Transpile javascript to esmodule for production
• start:dev - Run demo in the browser with original source
• start:prod - Run demo in the browser with production bundle
• start:examples:* - Run specified demo in the browser. Replace the * with the name of the demo.
• test - Run tests
• test:details - Run tests with details
• test:coverage - Run tests with code coverage
• test:snapshot:cleanup - Remove old outdated snapshots prior to running tests
• storybook - Run storybook stories in browser
• build-storybook - Build storybook stories
• build-source-map - Bundle source map for analyzer
• view-source-map - View application depenendency tree and bundle size

HOW TO USE

INSTALL

Add the component to your React application with npm or yarn.

Using yarn:

yarn add newton-checkbox-tree

Using npm:

npm install newton-checkbox-tree --save

Note – This library makes use of Font Awesome styles and expects them to be loaded in the browser.

INCLUDE CSS

For your convenience, the library's styles can be consumed utilizing one of the following files:

• newton-checkbox-tree/dist/css/newton-checkbox-tree.css
• newton-checkbox-tree/src/scss/newton-checkbox-tree.scss

Either include one of these files in your stylesheets or utilize a CSS loader:

import 'newton-checkbox-tree/dist/css/newton-checkbox-tree.css';
import 'newton-checkbox-tree/src/scss/newton-checkbox-tree.scss';

RENDER COMPONENT

A quick usage example is included below. Note that the newton-checkbox-tree component is controlled. In other words, it is stateless. You must update its checked and expanded properties whenever a change occurs.

import React from 'react';
import CheckboxTree from 'newton-checkbox-tree';

const nodes = [{
    value: 'user',
    label: 'user',
    category: 'table',
    children: [
        { value: 'name', label: 'name', category: 'field' },
        { value: 'address', label: 'address', category: 'field' },
    ],
}];

class Widget extends React.Component {
    state = {
        checked: [],
        expanded: [],
    };

    render() {
        return (
            <CheckboxTree
                nodes={nodes}
                checked={this.state.checked}
                expanded={this.state.expanded}
                onCheck={checked => this.setState({ checked })}
                onExpand={expanded => this.setState({ expanded })}
            />
        );
    }
}

All node objects must have a unique value. This value is serialized into the checked and expanded arrays and is also used for performance optimizations.

CHANGING DEFAULT ICONS

By default, newton-checkbox-tree uses Font Awesome for the various icons that appear in the tree. To change the defaults, simply pass in the icons property and override the defaults. Note that you can override as many or as little icons as you like:

<CheckboxTree
    ...
    icons={{
        check: <span className="rct-icon rct-icon-check" />,
        uncheck: <span className="rct-icon rct-icon-uncheck" />,
        halfCheck: <span className="rct-icon rct-icon-half-check" />,
        expandClose: <span className="rct-icon rct-icon-expand-close" />,
        expandOpen: <span className="rct-icon rct-icon-expand-open" />,
        expandAll: <span className="rct-icon rct-icon-expand-all" />,
        collapseAll: <span className="rct-icon rct-icon-collapse-all" />,
        parentClose: <span className="rct-icon rct-icon-parent-close" />,
        parentOpen: <span className="rct-icon rct-icon-parent-open" />,
        leaf: <span className="rct-icon rct-icon-leaf" />,
    }}
/>

If you are using the react-fontawesome library, you can also directly substitute those icons:

import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
...

<CheckboxTree
    ...
    icons={{
        check: <FontAwesomeIcon className="rct-icon rct-icon-check" icon="check-square" />,
        uncheck: <FontAwesomeIcon className="rct-icon rct-icon-uncheck" icon={['far', 'square']} />,
        halfCheck: <FontAwesomeIcon className="rct-icon rct-icon-half-check" icon="check-square" />,
        expandClose: <FontAwesomeIcon className="rct-icon rct-icon-expand-close" icon="chevron-right" />,
        expandOpen: <FontAwesomeIcon className="rct-icon rct-icon-expand-open" icon="chevron-down" />,
        expandAll: <FontAwesomeIcon className="rct-icon rct-icon-expand-all" icon="plus-square" />,
        collapseAll: <FontAwesomeIcon className="rct-icon rct-icon-collapse-all" icon="minus-square" />,
        parentClose: <FontAwesomeIcon className="rct-icon rct-icon-parent-close" icon="folder" />,
        parentOpen: <FontAwesomeIcon className="rct-icon rct-icon-parent-open" icon="folder-open" />,
        leaf: <FontAwesomeIcon className="rct-icon rct-icon-leaf-close" icon="file" />
    }}
/>

COMPONENT PROPERTIES

Property	Type	Description	Default
nodes	array	Required. Specifies the tree nodes and their children.
checked	array	An array of checked node values.	[]
disabled	bool	If true, the component will be disabled and nodes cannot be checked.	false
expandDisabled	bool	If true, the ability to expand nodes will be disabled.	false
expandOnClick	bool	If true, nodes will be expanded by clicking on labels. Requires a non-empty onClick function.	false
icons	object	An object containing the mappings for the various icons and their components. See Changing the Default Icons.	{ ... }
id	string	A string to be used for the HTML ID of the rendered tree and its nodes.	null
expanded	array	An array of expanded node values.	[]
lang	object	An object containing the language mappings for the various text elements.	{ ... }
name	string	Optional name for the hidden <input> element.	undefined
nameAsArray	bool	If true, the hidden <input> will encode its values as an array rather than a joined string.	false
nativeCheckboxes	bool	If true, native browser checkboxes will be used instead of pseudo-checkbox icons.	false
noCascade	bool	If true, toggling a parent node will not cascade its check state to its children.	false
onlyLeafCheckboxes	bool	If true, checkboxes will only be shown for leaf nodes.	false
optimisticToggle	bool	If true, toggling a partially-checked node will select all children. If false, it will deselect.	true
showExpandAll	bool	If true, buttons for expanding and collapsing all parent nodes will appear in the tree.	false
showNodeIcon	bool	If true, each node will show a parent or leaf icon.	true
showNodeTitle	bool	If true, the label of each node will become the title of the resulting DOM node. Overridden by node.title.	false
onCheck	function	onCheck handler: function(checked, targetNode) {}	() => {}
onClick	function	onClick handler: function(targetNode) {}. If set, onClick will be called when a node's label has been clicked.	() => {}
onExpand	function	onExpand handler: function(expanded, targetNode) {}	() => {}

onCheck and onExpand

onCheck and onExpand events must be implemented in your React component in order to update newton checkbox tree checked and expanded state. Clicking the checkbox or clicking the expand icon will not update the components state due to the fact that its a stateless component.

NODE PROPERTIES

Individual nodes within the nodes property can have the following structure:

Property	Type	Description	Default
label	mixed	Required. The node's label.
value	mixed	Required. The node's value.
children	array	An array of child nodes.	null
className	string	A className to add to the node.	null
disabled	bool	Whether the node should be disabled.	false
icon	mixed	A custom icon for the node.	null
showCheckbox	bool	Whether the node should show a checkbox.	true
showIcon	bool	Whether the node should show an icon.	true
title	string	A custom title attribute for the node.	null
category	string	The node's category.	null