如何在Highcharts树形图中获得当前的钻取事件级别？ [英] How to get current level on drilldown event in Highcharts treemap?

问题描述

似乎钻取事件没有在Highcharts Treemap中触发。我需要执行一些任务，例如在钻取和drillup事件中显示当前级别的警报。如何在Treemaps中完成这项工作？

Seems like drilldown event is not triggered in Highcharts Treemap. I need to perform some task like showing alert with current level number on drilldown and drillup events. How can this be done in Treemaps?

推荐答案

在我看到此时您可以捕获重绘事件并准备一个简单的解析器检查ID。默认结构是第一级id_1，第二级id_1_1。最简单的是使用分割，并检查数组的长度。显然，这是非常糟糕的解决方案。

At I see at this moment you can catch redraw event and prepare a simple "parser" which check id. Default structure of that is id_1 for first level, id_1_1 for second level. The simplest is use a split, and check length of array. Obviosuly this is very poor solution.

events: {
            redraw: function () {

                var rootNode = this.series[0].rootNode;

                if (rootNode === '') {
                    alert(' NO DRILLED - LEVEL 0 ')
                } else {
                    if (rootNode.split('_').length == 2) {
                        alert(' DRILLED - LEVEL 1');
                    } else if (rootNode.split('_').length >= 2) {
                        alert(' DRILLED - LEVEL 2');
                    }
                }

            }
        }

例如： http://jsfiddle.net/ghh1x7vt/1/

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