react-diagrams/demos/demo-grid/index.tsx

import {
	DiagramEngine,
	DefaultNodeFactory,
	DefaultLinkFactory,
	DiagramModel,
	DefaultNodeModel,
	LinkModel,
	DefaultPortModel,
	DiagramWidget
} from "../../src/main";
import * as React from "react";

/**
 * Tests the grid size
 */
export default () => {
	//1) setup the diagram engine
	var engine = new DiagramEngine();
	engine.installDefaultFactories();

	//2) setup the diagram model
	var model = new DiagramModel();
	model.setGridSize(50);

	//3-A) create a default node
	var node1 = new DefaultNodeModel("Node 1", "rgb(0,192,255)");
	var port1 = node1.addPort(new DefaultPortModel(false, "out-1", "Out"));
	node1.x = 100;
	node1.y = 100;

	//3-B) create another default node
	var node2 = new DefaultNodeModel("Node 2", "rgb(192,255,0)");
	var port2 = node2.addPort(new DefaultPortModel(true, "in-1", "IN"));
	node2.x = 400;
	node2.y = 100;

	//3-C) link the 2 nodes together
	var link1 = new LinkModel();
	link1.setSourcePort(port1);
	link1.setTargetPort(port2);

	//4) add the models to the root graph
	model.addNode(node1);
	model.addNode(node2);
	model.addLink(link1);

	//5) load model into engine
	engine.setDiagramModel(model);

	//6) render the diagram!
	return <DiagramWidget diagramEngine={engine} />;
};