@dorgaren/react-vs-tree

A simple tree view control to be used with React

This has been forked from Jake Zatecky's React Checkbox Tree. I also bumped the version quite somewhat. The reason for this primarily is that I need this to undergo serious changes in a very short time frame. This is the reason for the renaming as well - the idea is to make the checkboxes completely optional.

Should you have any problems about the above, please let me know. Should one need any new feature (provided that they will manifest) in the original package, feel free to re-integrate / merge / pull / whatnot.

This component has been tested to work with ES5, plain JS (that is, no JSX) and Preact. These possibilities are considered to be important and maintained.

Usage

Installation

Install the library using yarn:

yarn add @dorgaren/react-vs-tree

Using npm:

npm install --save @dorgaren/react-vs-tree

Note – This library makes use of Font Awesome styles and expects them to be loaded in the browser. If you don't have it, nor plan to use it, please be sure to provide your own icons elements.

Include CSS

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

• node_modules/@dorgaren/react-vs-tree/lib/react-vs-tree.css
• node_modules/@dorgaren/react-vs-tree/src/less/react-vs-tree.less
• node_modules/@dorgaren/react-vs-tree/src/scss/react-vs-tree.scss

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

import '@dorgaren/react-vs-tree/lib/react-vs-tree.css';

Render Component

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

NOTE: from version 2.1.0 onwards, providing nodes as an object with e.g. ids as keys instead of a flat array is supported.

import React from "react";
import Tree from "react-vs-tree";

const nodes = [{
    value: 1,
    label: "Mars",
    children: [
        { value: 12, label: "Phobos" },
        { value: 13, label: "Deimos" },
    ]
}];

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

    render()
    {
        return (
            <Tree
                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 the Default Icons

By default, react-vs-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:

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

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

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

...

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

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.	[]
labelProp	string	The name for the "label" property for nodes, now configurable	"label"
valueProp	string	The name for the "value" property for nodes, now configurable	"value"
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
showCheckboxes	bool	If true, checkboxes are displayed by default to be able to select any node, leaf or not	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

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
title	string	A custom title attribute for the node	null