react-tech-tree

Create highly customizable tech trees (or generic graphical trees)

Features

Light
- Zero dependencies (besides react)
- Tree-shaking ready
- < 2Kb gzipped
Responsive
- works on mobile, desktop, etc
Image Support
- sprite sheets (e.g: TexturePacker)
- individual images
Customizable
- style links and nodes
- ready to use with react-tooltip, etc
- good examples

Installation

npm: npm install --save react-tech-tree
yarn: yarn add react-tech-tree

Usage

import React from "react";

import { Tree } from "react-tech-tree";
import "react-tech-tree/dist/index.css";

const nodes = [
  [
    { id: "A0", name: "A" },
    { id: "B0", name: "B" }
  ]
];
const links = [{ from: "A0", to: "B0" }];

function ExampleComponent() {
  return <Tree nodes={nodes} links={links} />;
}

Options

Tree

import { Tree } from "react-tech-tree";

Prop	Type	Description
id	`string`	id property (should be unique). E.g: uuuid
nodes	`{id:string, name: string}[][]`	2d array with nodes information
links	`{from:string, to: string}[]`	array with links information
NodeElement	`ReactElement`	(optional) React Element to be used as Node. Defaults to `Node`.
nodeProps	`object`	(optional) Properties to pass down to Node elements. See `Node`.
linkProps	`object`	(optional) See below.

linkProps

Prop	Type	Description
pathMaker	`(r0: Rect,r1: Rect, props?: object) => string`	(optional) Function to generate string paths. Defaults to `simplePathMaker`

Node

import { Node } from "react-tech-tree";

Prop	Type	Description
onClick	`(e: MouseEvent) => void`	(optional) Event Handler fired when the Node is clicked. Defaults to `nodeClickHandler`

Sprite

import { Sprite } from "react-tech-tree";

Prop	Type	Description
name	`string`	name of spritesheet entry or image name for this Sprite
styleName	() => `object`	function to style the Sprite from its name. Example

Link

import { Link } from "react-tech-tree";

Prop	Type	Description
pathData	`string`	data to build links. E.g: `M 0 0 L 1 1`

helpers

nodeClickHandler

import { nodeClickHandler } from "react-tech-tree";

clickHandler function used by Node internally. Use it when you are trying to build a custom NodeElement that you pass to a Tree.

It will:

mark Node with class active
mark Node's children with class next-active

//...

function MyNodeElement({ name, id }) {
  return (
    <button id={id} onClick={nodeClickHandler}>
      {name}
    </button>
  );
}

function ExampleComponent() {
  return <Tree nodes={nodes} links={links} NodeElement={MyNodeElement} />;
}

prepareSpritesheetStyle

import { prepareSpritesheetStyle } from "react-tech-tree";

When using spritesheets, you may need to style each Sprite based on its name.

If you are using TexturePacker, you can use this function as follows:

//...
import spriteInformation from "./data/spritesheet.json";
import spriteImage from "./data/spritesheet.png";
//...

const nodeProps = {
  styleName: prepareSpritesheetStyle(spriteImage, spriteInformation)
};

function ExampleComponent() {
  return <Tree nodes={nodes} links={links} nodeProps={nodeProps} />;
}

simplePathMaker

import { simplePathMaker } from "react-tech-tree";

Pure function that return a string path between the center of two rectangles.

const rect0 = { x: 0, y: 24, width: 4, height: 4 };
const rect1 = { x: 8, y: 32, width: 2, height: 2 };
const path = simplePathMaker(rect0, rect1);
// "M 2 26 L 9 33"

It is used at the default value for building links between Nodes. It can be passed down in linkProps to a Tree. See example

//...

const linkProps = { pathMaker: simplePathMaker };

function ExampleComponent() {
  return <Tree nodes={nodes} links={links} linkProps={linkProps} />;
}

ldd/react-tech-tree