Limit to single open branch in ForceDirectedSeries

This demo shows how we can use setting-bound event to limit open branches in ForceDirectedSeries to one.

The following code ensures that all open branches are collapsed, when another branch is expanded.

series.nodes.template.on("disabled", function(disabled, targetNode) {
  let targetLevel = targetNode.dataItem.get("depth");
  if (!disabled) {
    series.nodes.each(function(node) {
      if (node.dataItem.get("depth") == targetLevel && node !== targetNode) {
        node.set("disabled", true);
      }
    })
  }
})

series.nodes.template.on("disabled", function(disabled, targetNode) {
  var targetLevel = targetNode.dataItem.get("depth");
  if (!disabled) {
    series.nodes.each(function(node) {
      if (node.dataItem.get("depth") == targetLevel && node !== targetNode) {
        node.set("disabled", true);
      }
    })
  }
})

See the Pen amCharts 5: Limit to single open branch in ForceDirectedSeries by amCharts team (@amcharts) on CodePen.