Highcharts 网络图箭头链接 [英] Highcharts Network Graph Arrow Links

问题描述

我正在尝试使用 Highcharts 创建一个网络图，如下所示:

I am trying to create a network graph using Highcharts as follows:

但是，我在 Highcharts 网络图模块中没有看到任何添加箭头而不是连接节点的线段的选项.使用 Highcharts 可以做到这一点吗?如果没有，此用例是否有更好的替代方案?这是我目前必须渲染网络图的代码.

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
    }]
});

这将呈现如下网络图:

推荐答案

根据评论 - 这里是关于如何在网络图系列中的链接末尾呈现箭头的答案.

According to the comments - here is an answer on how to render the arrows at the end of the links in the networkgraph series.

演示: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));

这篇关于Highcharts 网络图箭头链接的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！