Drawflow

Simple flow library.

Drawflow allows you to create data flows easily and quickly.

Installing only a javascript library and with four lines of code.

⭐ LIVE DEMO

🎨 THEME EDIT GENERATOR

Table of contents

• Features
• Installation
  • Running
• Mouse and Keys
• Editor
  • Options
• Modules
• Nodes
  • Node example
  • Register Node
• Methods
  • Methods example
• Events
  • Events example
• Export / Import
  • Export example
• Example
• License

Features

• Drag Nodes
• Multiple Inputs / Outputs
• Multiple connections
• Delete Nodes and Connections
• Add/Delete inputs/outputs
• Reroute connections
• Data sync on Nodes
• Zoom in / out
• Clear data module
• Support modules
• Editor mode edit, fixed or view
• Import / Export data
• Events
• Mobile support
• Vanilla javascript (No dependencies)
• NPM
• Vue Support component nodes && Nuxt

Installation

Download or clone repository and copy the dist folder, CDN option Or npm.

Clone

git clone https://github.com/jerosoler/Drawflow.git

CDN

# Last
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/jerosoler/Drawflow/dist/drawflow.min.css">
<script src="https://cdn.jsdelivr.net/gh/jerosoler/Drawflow/dist/drawflow.min.js"></script>
# or version view releases https://github.com/jerosoler/Drawflow/releases
<link rel="stylesheet" href="https://unpkg.com/drawflow@x.x.xx/dist/drawflow.min.css" />
<script src="https://unpkg.com/drawflow@x.x.xx/dist/drawflow.min.js"></script>

NPM

npm i drawflow

Typescript

External package. More info #119

npm install -D @types/drawflow

Import

import Drawflow from 'drawflow'
import styleDrawflow from 'drawflow/dist/drawflow.min.css'

Require

var Drawflow = require('drawflow')
var styleDrawflow = require('drawflow/dist/drawflow.min.css')

Create the parent element of drawflow.

<div id="drawflow"></div>

Running

Start drawflow.

var id = document.getElementById("drawflow");
const editor = new Drawflow(id);
editor.start();

Parameter	Type	Description
id	Object	Name of module
render	Object	It's for Vue.
parent	Object	It's for Vue. The parent Instance

For vue 2 example.

import Vue from 'vue'

// Pass render Vue
this.editor = new Drawflow(id, Vue, this);

For vue 3 example.

import { h, getCurrentInstance, render } from 'vue'
const Vue = { version: 3, h, render };

this.editor = new Drawflow(id, Vue);
// Pass render Vue 3 Instance
const internalInstance = getCurrentInstance()
editor.value = new Drawflow(id, Vue, internalInstance.appContext.app._context);

Nuxt

Add to nuxt.config.js file

build: {
    transpile: ['drawflow'],
    ...
  }

Mouse and Keys

• del key to remove element.
• Right click to show remove options (Mobile long press).
• Left click press to move editor or node selected.
• Ctrl + Mouse Wheel Zoom in/out (Mobile pinch).

Editor

You can change the editor to fixed type to block. Only editor can be moved. You can put it before start.

editor.editor_mode = 'edit'; // Default
editor.editor_mode = 'fixed'; // Only scroll

You can also adjust the zoom values.

editor.zoom_max = 1.6;
editor.zoom_min = 0.5;
editor.zoom_value = 0.1;

Editor options

Parameter	Type	Default	Description
reroute	Boolean	false	Active reroute
reroute_fix_curvature	Boolean	false	Fix adding points
curvature	Number	0.5	Curvature
reroute_curvature_start_end	Number	0.5	Curvature reroute first point and las point
reroute_curvature	Number	0.5	Curvature reroute
reroute_width	Number	6	Width of reroute
line_path	Number	5	Width of line
force_first_input	Boolean	false	Force the first input to drop the connection on top of the node
editor_mode	Text	edit	edit for edit, fixed for nodes fixed but their input fields available, view for view only
zoom	Number	1	Default zoom
zoom_max	Number	1.6	Default zoom max
zoom_min	Number	0.5	Default zoom min
zoom_value	Number	0.1	Default zoom value update
zoom_last_value	Number	1	Default zoom last value
draggable_inputs	Boolean	true	Drag nodes on click inputs
useuuid	Boolean	false	Use UUID as node ID instead of integer index. Only affect newly created nodes, do not affect imported nodes

Reroute

Active reroute connections. Use before start or import.

editor.reroute = true;

Create point with double click on line connection. Double click on point for remove.

Modules

Separate your flows in different editors.

editor.addModule('nameNewModule');
editor.changeModule('nameNewModule');
editor.removeModule('nameModule');
// Default Module is Home
editor.changeModule('Home');

RemovedModule if it is in the same module redirects to the Home module

Nodes

Adding a node is simple.

editor.addNode(name, inputs, outputs, posx, posy, class, data, html);

Parameter	Type	Description
name	text	Name of module
inputs	number	Number of de inputs
outputs	number	Number of de outputs
pos_x	number	Position on start node left
pos_y	number	Position on start node top
class	text	Added classname to de node. Multiple classnames separated by space
data	json	Data passed to node
html	text	HTML drawn on node or name of register node.
typenode	boolean & text	Default false, true for Object HTML, vue for vue

You can use the attribute df-* in inputs, textarea or select to synchronize with the node data and contenteditable.

Atrributs multiples parents support df-*-*...

Node example

var html = `
<div><input type="text" df-name></div>
`;
var data = { "name": '' };

editor.addNode('github', 0, 1, 150, 300, 'github', data, html);

Register Node

it's possible register nodes for reuse.

var html = document.createElement("div");
html.innerHTML =  "Hello Drawflow!!";
editor.registerNode('test', html);
// Use
editor.addNode('github', 0, 1, 150, 300, 'github', data, 'test', true);

// For vue
import component from '~/components/testcomponent.vue'
editor.registerNode('name', component, props, options);
// Use for vue
editor.addNode('github', 0, 1, 150, 300, 'github', data, 'name', 'vue');

Parameter	Type	Description
name	text	Name of module registered.
html	text	HTML to drawn or vue component.
props	json	Only for vue. Props of component. Not Required
options	json	Only for vue. Options of component. Not Required

Methods

Other available functions.

Mehtod	Description
zoom_in()	Increment zoom +0.1
zoom_out()	Decrement zoom -0.1
getNodeFromId(id)	Get Info of node. Ex: id: 5
getNodesFromName(name)	Return Array of nodes id. Ex: name: telegram
removeNodeId(id)	Remove node. Ex id: node-x
updateNodeDataFromId	Update data element. Ex: 5, { name: 'Drawflow' }
addNodeInput(id)	Add input to node. Ex id: 5
addNodeOutput(id)	Add output to node. Ex id: 5
removeNodeInput(id, input_class)	Remove input to node. Ex id: 5, input_2
removeNodeOutput(id, output_class)	Remove output to node. Ex id: 5, output_2
addConnection(id_output, id_input, output_class, input_class)	Add connection. Ex: 15,16,'output_1','input_1'
removeSingleConnection(id_output, id_input, output_class, input_class)	Remove connection. Ex: 15,16,'output_1','input_1'
updateConnectionNodes(id)	Update connections position from Node Ex id: node-x
removeConnectionNodeId(id)	Remove node connections. Ex id: node-x
getModuleFromNodeId(id)	Get name of module where is the id. Ex id: 5
clearModuleSelected()	Clear data of module selected
clear()	Clear all data of all modules and modules remove.

Methods example

editor.removeNodeId('node-4');

Events

You can detect events that are happening.

List of available events:

Event	Return	Description
nodeCreated	id	id of Node
nodeRemoved	id	id of Node
nodeDataChanged	id	id of Node df-* attributes changed.
nodeSelected	id	id of Node
nodeUnselected	true	Unselect node
nodeMoved	id	id of Node
connectionStart	{ output_id, output_class }	id of nodes and output selected
connectionCancel	true	Connection Cancel
connectionCreated	{ output_id, input_id, output_class, input_class }	id's of nodes and output/input selected
connectionRemoved	{ output_id, input_id, output_class, input_class }	id's of nodes and output/input selected
connectionSelected	{ output_id, input_id, output_class, input_class }	id's of nodes and output/input selected
connectionUnselected	true	Unselect connection
addReroute	id	id of Node output
removeReroute	id	id of Node output
rerouteMoved	id	id of Node output
moduleCreated	name	name of Module
moduleChanged	name	name of Module
moduleRemoved	name	name of Module
click	event	Click event
clickEnd	event	Once the click changes have been made
contextmenu	event	Click second button mouse event
mouseMove	{ x, y }	Position
mouseUp	event	MouseUp Event
keydown	event	Keydown event
zoom	zoom_level	Level of zoom
translate	{ x, y }	Position translate editor
import	import	Finish import
export	data	Data export

Events example

editor.on('nodeCreated', function(id) {
  console.log("Node created " + id);
})

Export / Import

You can export and import your data.

var exportdata = editor.export();
editor.import(exportdata);

Export example

Example of exported data:

{
    "drawflow": {
        "Home": {
            "data": {}
        },
        "Other": {
            "data": {
                "16": {
                    "id": 16,
                    "name": "facebook",
                    "data": {},
                    "class": "facebook",
                    "html": "\n        
\n          
 Facebook Message
\n        
\n        ",
                    "inputs": {},
                    "outputs": {
                        "output_1": {
                            "connections": [
                                {
                                    "node": "17",
                                    "output": "input_1"
                                }
                            ]
                        }
                    },
                    "pos_x": 226,
                    "pos_y": 138
                },
                "17": {
                    "id": 17,
                    "name": "log",
                    "data": {},
                    "class": "log",
                    "html": "\n            
\n              
 Save log file
\n            
\n            ",
                    "inputs": {
                        "input_1": {
                            "connections": [
                                {
                                    "node": "16",
                                    "input": "output_1"
                                }
                            ]
                        }
                    },
                    "outputs": {},
                    "pos_x": 690,
                    "pos_y": 129
                }
            }
        }
    }
}

Example

View the complete example in folder docs.
There is also an example how to use Drawflow in a custom element. (based on LitElement).

License

MIT License