Huge News!Announcing our $40M Series B led by Abstract Ventures.Learn More
Socket
Sign inDemoInstall
Socket

cytoscape-canvas

Package Overview
Dependencies
Maintainers
6
Versions
7
Alerts
File Explorer

Advanced tools

Socket logo

Install Socket

Detect and block malicious and high-risk dependencies

Install

cytoscape-canvas

A Cytoscape extension to enable drawing over and under a graph

  • 3.0.1
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
8.6K
decreased by-9.57%
Maintainers
6
Weekly downloads
 
Created
Source

cytoscape-canvas

Preview

Description

An extension to create a canvas over or under a Cytoscape graph. Useful for customizing nodes/edges, drawing backgrounds, etc.

Demo

Demo

Dependencies

  • Cytoscape.js >=3.0.0

Example

var cytoscape = require('cytoscape');
var cyCanvas = require('cytoscape-canvas');

cyCanvas(cytoscape); // Register extension

var cy = cytoscape({/* ... */});

var layer = cy.cyCanvas();
var canvas = layer.getCanvas();
var ctx = canvas.getContext('2d');

cy.on("render cyCanvas.resize", function(evt) {
	layer.resetTransform(ctx);
	layer.clear(ctx);

	// Draw fixed elements
	ctx.fillRect(0, 0, 100, 100); // Top left corner

	layer.setTransform(ctx);

	// Draw model elements
	cy.nodes().forEach(function(node) {
		var pos = node.position();
		ctx.fillRect(pos.x, pos.y, 100, 100); // At node position
	});
});

Usage instructions

Download the library:

  • via npm: npm install cytoscape-canvas,
  • via bower: bower install cytoscape-canvas , or
  • via direct download in the repository (probably from a tag).

require() the library as appropriate for your project:

CommonJS:

var cytoscape = require('cytoscape');
var cyCanvas = require('cytoscape-canvas');

cyCanvas(cytoscape); // Register extension

AMD:

require(['cytoscape', 'cytoscape-canvas'], function(cytoscape, cyCanvas) {
  cyCanvas(cytoscape); // Register extension
});

Plain HTML/JS has the extension registered for you automatically, because no require() is needed.

Initialisation

var cy = cytoscape({/* ... */});

var layer = cy.cyCanvas({
  zIndex: 1,
  pixelRatio: "auto",
});

API

layer.getCanvas()

  • return: Canvas The generated canvas

layer.setTransform(ctx)

Set the context transform to match Cystoscape's zoom & pan. Further drawing will be on model position.

  • param: CanvasRenderingContext2D ctx
layer.resetTransform(ctx)

Reset the context transform. Further drawing will be on rendered position.

  • param: CanvasRenderingContext2D ctx
layer.clear(ctx)

Clear the entire canvas.

  • param: CanvasRenderingContext2D ctx

Events

cyCanvas.resize: When the extension's canvas is resized

Keywords

FAQs

Package last updated on 18 Aug 2017

Did you know?

Socket

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Install

Related posts

SocketSocket SOC 2 Logo

Product

  • Package Alerts
  • Integrations
  • Docs
  • Pricing
  • FAQ
  • Roadmap
  • Changelog

Packages

npm

Stay in touch

Get open source security insights delivered straight into your inbox.


  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc