Ссылки на график сети Highcharts

Question

Я пытаюсь создать сетевой график с помощью Highcharts следующим образом:

However, I did not see any options to add arrows instead of line segments connecting the nodes in the Highcharts network graph module. Is this possible to do this using Highcharts? If not, are there any better alternatives for this use case? Here is the code I currently have to render a network graph.

    eventWorkflowGraph = Highcharts.chart('graph-canvas', {
    chart: {
        type: 'networkgraph',
        spacingBottom: 15,
        spacingTop: 15,
        spacingLeft: 15,
        spacingRight: 15,
    },
    title: {
        text: 'Workflow'
    },
    subtitle: {
        text: 'Network Graph'
    },
    plotOptions: {
        networkgraph: {
            keys: ['from', 'to'],
            layoutAlgorithm: {
                friction: -0.9,
                linkLength: 100,
                enableSimulation: true
            },
            link: {
                width: 4
            }
        }
    },
    series: [{
        dataLabels: {
            enabled: true,
            linkFormat: '',
        },
        marker: {
            radius: 45
        },
        data: edges
    }]
});

This renders a network graph as follows: введите описание изображения здесь

Answer 1

Согласно комментариям - вот ответ, как отрендерить стрелки в конце ссылок в серии networkgraph.

Демо: https://jsfiddle.net/BlackLabel/cnjw7v2s/

(function(H) {
  H.wrap(H.seriesTypes.networkgraph.prototype.pointClass.prototype, 'getLinkPath', function(p) {
    var left = this.toNode,
      right = this.fromNode;

    var angle = Math.atan((left.plotX - right.plotX) /
      (left.plotY - right.plotY));


    if (angle) {
      let path = ['M', left.plotX, left.plotY, right.plotX, right.plotY],
        lastPoint = left,
        nextLastPoint = right,
        pointRadius = 45,
        arrowLength = 20,
        arrowWidth = 10;

      if (left.plotY < right.plotY) {
        path.push(
          nextLastPoint.plotX - pointRadius * Math.sin(angle),
          nextLastPoint.plotY - pointRadius * Math.cos(angle),
        );
        path.push(
          nextLastPoint.plotX - pointRadius * Math.sin(angle) - arrowLength * Math.sin(angle) - arrowWidth * Math.cos(angle),
          nextLastPoint.plotY - pointRadius * Math.cos(angle) - arrowLength * Math.cos(angle) + arrowWidth * Math.sin(angle),
        );

        path.push(
          nextLastPoint.plotX - pointRadius * Math.sin(angle),
          nextLastPoint.plotY - pointRadius * Math.cos(angle),
        );
        path.push(
          nextLastPoint.plotX - pointRadius * Math.sin(angle) - arrowLength * Math.sin(angle) + arrowWidth * Math.cos(angle),
          nextLastPoint.plotY - pointRadius * Math.cos(angle) - arrowLength * Math.cos(angle) - arrowWidth * Math.sin(angle),
        );


      } else {
        path.push(
          nextLastPoint.plotX + pointRadius * Math.sin(angle),
          nextLastPoint.plotY + pointRadius * Math.cos(angle),
        );
        path.push(
          nextLastPoint.plotX + pointRadius * Math.sin(angle) + arrowLength * Math.sin(angle) - arrowWidth * Math.cos(angle),
          nextLastPoint.plotY + pointRadius * Math.cos(angle) + arrowLength * Math.cos(angle) + arrowWidth * Math.sin(angle),
        );
        path.push(
          nextLastPoint.plotX + pointRadius * Math.sin(angle),
          nextLastPoint.plotY + pointRadius * Math.cos(angle),
        );
        path.push(
          nextLastPoint.plotX + pointRadius * Math.sin(angle) + arrowLength * Math.sin(angle) + arrowWidth * Math.cos(angle),
          nextLastPoint.plotY + pointRadius * Math.cos(angle) + arrowLength * Math.cos(angle) - arrowWidth * Math.sin(angle),
        );

      }

      return path
    }
    return [
      ['M', left.plotX || 0, left.plotY || 0],
      ['L', right.plotX || 0, right.plotY || 0],
    ];
  });
}(Highcharts));