React drag-and-drop for directed graphs

Features

• Represent any directed graph
  • Multiple root nodes possible
  • Nodes can have multiple parents
• Drag and drop node movement
• Edges between nodes can be drawn intuitively
• Edges can be deleted by selecting them and clicking the Delete key
• Graph can be panned and zoomed

Install

• npm i --save react-dnd-tree

Usage

import DnDTree from 'react-dnd-tree'

Using SSR (Server-Side Rendering)

function Component(props) {

  const DnDTree = require('react-dnd-tree').default
  return (
    <DnDTree
      nodes={model.nodes}
      edges={model.edges}
      height={400}
      edgeDraw
      errorHandler={errorHandler}
      updateHandler={updateHandler}
      edgeType='curve'
      onNodeSelected={nodeSelected}
    />
  )
}

Options

• nodes: list of node objects of format { label }
• edges: list of edge objects of format { from: int, to: int } where from, to are indices into the nodes list
• edgeDraw: default=True, whether you can draw edges between nodes
• errorHandler: callback function taking an error message
• onNodeSelected: callback function taking the selected node object
• updateHandler: callback taking (nodes, edges) every time the user updates the graph
• edgeType: (curve | line) the line interpolation style between nodes