connecttool.js

import Tool from "./tool";
import { graph, state } from "../editor";
import * as Graph from "../graph";

const KEEP_SOURCE_KEY_ID = 17;

export default class ConnectTool extends Tool {
    constructor(key) {
        super("Connect two nodes", "connect", key);
        this.keepSource = false;
    }

    onNodeClick(node) {
        // Is a first node selected?
        if (
            state.selectedItem === undefined ||
            state.selectedItem.node === false
        ) {
            state.setSelectedItem(node);
            return;
        }

        // Add new link
        var details = {};

        var link = graph.addLink(
            state.selectedItem[Graph.NODE_ID],
            node[Graph.NODE_ID],
            details
        );

        if (link === undefined) {
            console.error("Could not create new link");
            return;
        }

        if (this.keepSource === false) {
            // Deselect the current first node
            // TODO: Returned object not yet converted to normal one
            state.setSelectedItem(link);
        }
    }

    onBackgroundClick(event, positions) {
        state.setSelectedItem(undefined);
    }

    onKeyDown(key) {
        if (key.keyCode === KEEP_SOURCE_KEY_ID) {
            this.keepSource = true;
        }
    }

    onKeyUp(key) {
        if (key.keyCode === KEEP_SOURCE_KEY_ID) {
            this.keepSource = false;
        }
    }
}