@projectstorm/react-diagrams-core/dist/states/DragDiagramItemsState.js

This workspace houses the default models

import { Action, InputType, MoveItemsState } from '@projectstorm/react-canvas-core';
import _forEach from 'lodash/forEach';
import { PointModel } from '../entities/link/PointModel';
import { PortModel } from '../entities/port/PortModel';
export class DragDiagramItemsState extends MoveItemsState {
    constructor() {
        super();
        this.registerAction(new Action({
            type: InputType.MOUSE_UP,
            fire: (event) => {
                const item = this.engine.getMouseElement(event.event);
                if (item instanceof PortModel) {
                    _forEach(this.initialPositions, (position) => {
                        if (position.item instanceof PointModel) {
                            const link = position.item.getParent();
                            // only care about the last links
                            if (link.getLastPoint() !== position.item) {
                                return;
                            }
                            if (link.getSourcePort().canLinkToPort(item)) {
                                link.setTargetPort(item);
                                item.reportPosition();
                                this.engine.repaintCanvas();
                            }
                        }
                    });
                }
            }
        }));
    }
}
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