React-diagrams invisible

Question

Following the installation guide in projectstorm/react-diagrams docs, I have trouble with the diagram not rendering properly. Inspecting the page reveals the positions of the nodes - but they are invisible. Using sass, I have imported into app.scss @import "~storm-react-diagrams/src/sass/main"; I have also tried using the raw minified css with no improvement.

I still assume this is an error on my end, possibly I create the engine in the wrong place? I have a engineReducer to provide the default engine.

import * as SRD from "storm-react-diagrams";

//1) setup the diagram engine
var engine = new SRD.DiagramEngine();
engine.installDefaultFactories();

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

//3-A) create a default node
var node1 = new SRD.DefaultNodeModel("Node 1", "rgb(0,192,255)");
let port1 = node1.addOutPort("Out");
node1.setPosition(100, 100);

//3-B) create another default node
var node2 = new SRD.DefaultNodeModel("Node 2", "rgb(192,255,0)");
let port2 = node2.addInPort("In");
node2.setPosition(400, 100);

// link the ports
let link1 = port1.link(port2);
link1.addLabel("Hello World!");

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

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

const initialEngine = engine;

export default function (state = engine, action) {        
    return state;
}

Then, my main component looks like this:

import React, { Component } from 'react';
import ReactDOM from 'react-dom';
import * as SRD from "storm-react-diagrams"
import {connect} from 'react-redux';

class Main extends Component {

    render() {
        console.log(this.props.engine); // Looks good!        
        return (
            <div className="app">               
                <SRD.DiagramWidget className="srd-demo-canvas" diagramEngine={this.props.engine} />
            </div>
        );
    }
}

function mapStateToProps(state) {
    return { engine: state.engine };
  }

export default connect(mapStateToProps)(Main)

Quite honestly I dont understand the docs reference to

In your library code

that is, where should I initialize the engine? What else am I missing?

Answer 1

You need to set a explicit height for the widget. Something like:

.srd-demo-canvas {
    height: 100vh;
}