@ajuhos/react-flow-chart

A flexible, stateless flow chart library for react.

Usage no npm install needed!

<script type="module">
  import ajuhosReactFlowChart from 'https://cdn.skypack.dev/@ajuhos/react-flow-chart';
</script>

README

React Flow Chart

CircleCI

  • Dragabble Nodes and Canvas
  • Create curved links between ports
  • Custom components for Canvas, Links, Ports, Nodes
  • React state container
  • Update state on Select/Hover nodes, ports and links
  • Base functionality complete
  • Stable NPM version
  • Scroll/Pinch canvas to zoom
  • Ctrl+z/Ctrl+y history
  • Read-only mode
  • Redux state container
  • Arrow heads on links
  • Docs

Storybook Demo

CodeSandbox Demo

This project aims to build a highly customisable, declarative flow chart library. Critically, you control the state. Pick from Redux, MobX, React or any other state managment library - simply pass in the current state and hook up the callbacks.

For example:

demo

Data Stucture

The flow chart is designed as a collection of Nodes, Ports and Links. You can specify your own custom properties, making this format quite flexible. See types/chart.ts. Note, nodes, ports and links should have a unique id.

Example


export const chart: IChart = {
  offset: {
    x: 0,
    y: 0,
  },
  scale: 1,
  nodes: {
    node1: {
      id: 'node1',
      type: 'output-only',
      position: {
        x: 300,
        y: 100,
      },
      ports: {
        port1: {
          id: 'port1',
          type: 'output',
          properties: {
            value: 'yes',
          },
        },
        port2: {
          id: 'port2',
          type: 'output',
          properties: {
            value: 'no',
          },
        },
      },
    },
    node2: {
      id: 'node2',
      type: 'input-output',
      position: {
        x: 300,
        y: 300,
      },
      ports: {
        port1: {
          id: 'port1',
          type: 'input',
        },
        port2: {
          id: 'port2',
          type: 'output',
        },
      },
    },
  },
  links: {
    link1: {
      id: 'link1',
      from: {
        nodeId: 'node1',
        portId: 'port2',
      },
      to: {
        nodeId: 'node2',
        portId: 'port1',
      },
    },
  },
  selected: {},
  hovered: {},
}

This will produce a simple 2 noded chart which looks like:

Demo

Basic Usage

npm i @mrblenny/react-flow-chart

Most components/types are available as a root level export. Check the storybook demo for more examples.

import { FlowChartWithState } from "@mrblenny/react-flow-chart";

const chartSimple = {
  offset: {
    x: 0,
    y: 0
  },
  nodes: {
    node1: {
      id: "node1",
      type: "output-only",
      position: {
        x: 300,
        y: 100
      },
      ports: {
        port1: {
          id: "port1",
          type: "output",
          properties: {
            value: "yes"
          }
        },
        port2: {
          id: "port2",
          type: "output",
          properties: {
            value: "no"
          }
        }
      }
    },
    node2: {
      id: "node2",
      type: "input-output",
      position: {
        x: 300,
        y: 300
      },
      ports: {
        port1: {
          id: "port1",
          type: "input"
        },
        port2: {
          id: "port2",
          type: "output"
        }
      }
    },
  },
  links: {
    link1: {
      id: "link1",
      from: {
        nodeId: "node1",
        portId: "port2"
      },
      to: {
        nodeId: "node2",
        portId: "port1"
      },
    },
  },
  selected: {},
  hovered: {}
};

const Example = (
  <FlowChartWithState initialValue={chartSimple} />
);

With Internal State

stories/InternalReactState.tsx

With External State

stories/ExternalReactState.tsx

Readonly Mode

stories/ReadonlyMode.tsx

Other Demos

stories/ExternalReactState.tsx

Contributing

If you're interested in helping out, let me know.

In particular, would be great to get a hand with docs and redux / mobx integrations.

Development

npm install
npm run start:storybook