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.
Table of contents
- Features
- Installation
- Mouse and Keys
- Editor
- Modules
- Nodes
- Methods
- Events
- Export / Import
- 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,fixedorview - 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 drawflowTypescript
External package. More info #119
npm install -D @types/drawflowImport
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 keyto remove element.Right clickto show remove options (Mobile long press).Left click pressto move editor or node selected.Ctrl + Mouse WheelZoom 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 scrollYou 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