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Curved edges changes to line after dragging a node

See original GitHub issue

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[x] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request => Please do not submit support request here

Current behavior curve set to shape.curveLinear from d3-shape. For the first render the edges have curveLinear shape. After drag and move a node the connected edges will be simple lines and not curveLinears.

Expected behavior Edges should keep curveLinear shape when the nodes are dragged around.

Reproduction of the problem See the demo: https://swimlane.github.io/ngx-graph/

import {Component, OnInit} from ‘@angular/core’;

import * as shape from ‘d3-shape’;

@Component({ selector: ‘app-xxxx’, templateUrl: ‘./xxxx.component.html’, styleUrls: [‘./xxxx.component.scss’] }) export class XxxxComponent implements OnInit {

constructor() { }

curve = (points) => shape.curveLinear(points); // or some other function from d3-shape // curve : any = shape.curveLinear;

nodes = [ { id: ‘start’, label: ‘start’ }, { id: ‘1’, label: ‘Query ThreatConnect’, }, { id: ‘2’, label: ‘Query XForce’, }, { id: ‘3’, label: ‘Format Results’ }, { id: ‘4’, label: ‘Search Splunk’ }, { id: ‘5’, label: ‘Block LDAP’ }, { id: ‘6’, label: ‘Email Results’ } ]; links = [ { source: ‘start’, target: ‘1’, label: ‘links to’ }, { source: ‘start’, target: ‘2’ }, { source: ‘1’, target: ‘3’, label: ‘related to’ }, { source: ‘2’, target: ‘4’ }, { source: ‘2’, target: ‘6’ }, { source: ‘3’, target: ‘5’ } ];

ngOnInit() {

}

<ngx-graph #graph [view]=“view” [links]=“links” [nodes]=“nodes” [curve]=“curve” [scheme]=“{ name: ‘vivid’, selectable: true, group: ‘Ordinal’, domain: [ ‘#647c8a’, ‘#3f51b5’, ‘#2196f3’, ‘#00b862’, ‘#afdf0a’, ‘#a7b61a’, ‘#f3e562’, ‘#ff9800’, ‘#ff5722’, ‘#ff4514’ ] }” [orientation]=“LR”

<ng-template #defsTemplate> <svg:marker id=“arrow” viewBox=“0 -5 10 10” refX=“8” refY=“0” markerWidth=“4” markerHeight=“4” orient=“auto”> <svg:path d=“M0,-5L10,0L0,5” class=“arrow-head” /> </svg:marker> </ng-template>

<ng-template #nodeTemplate let-node> <svg:g class=“node” ngx-tooltip [tooltipPlacement]=“‘top’” [tooltipType]=“‘tooltip’” [tooltipTitle]=“node.label”> <svg:rect [attr.width]=“node.width” [attr.height]=“node.height” [attr.fill]=“node.options.color” /> <svg:text alignment-baseline=“central” [attr.x]=“10” [attr.y]=“node.height / 2”>{{node.label}}</svg:text> </svg:g> </ng-template>

<ng-template #linkTemplate let-link> <svg:g class=“edge”> <svg:path class=“line” stroke-width=“2” marker-end=“url(#arrow)” > </svg:path> <svg:text class=“edge-label” text-anchor=“middle”> <textPath class=“text-path” [attr.href]=“‘#’ + link.id” [style.dominant-baseline]=“link.dominantBaseline” startOffset=“50%”> {{link.label}} </textPath> </svg:text> </svg:g> </ng-template>

</ngx-graph>

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