我正试图在森伯斯特图表上捕获追溯事件,但我无法实现。
我将事件对象添加到了图表对象,但仍然无法在函数内触发警报。
我基本上希望在向下钻取一个或多个级别之后单击右上角的按钮时,在我们向上钻取时触发alert / console.log。
codepen在这里供您参考。
Highcharts.chart('container', {
chart: {
height: '100%',
events: {
drillup: function() {
alert('Drilling up')
}
}
},
title: {
text: 'World population 2017'
},
subtitle: {
text: 'Source <href="https://en.wikipedia.org/wiki/List_of_countries_by_population_(United_Nations)">Wikipedia</a>'
},
series: [{
type: "sunburst",
data: data,
allowDrillToNode: true,
cursor: 'pointer',
dataLabels: {
format: '{point.name}',
filter: {
property: 'innerArcLength',
operator: '>',
value: 16
}
},
levels: [{
level: 1,
levelIsConstant: false,
dataLabels: {
filter: {
property: 'outerArcLength',
operator: '>',
value: 64
}
}
}, {
level: 2,
colorByPoint: true
},
{
level: 3,
colorVariation: {
key: 'brightness',
to: -0.5
}
}, {
level: 4,
colorVariation: {
key: 'brightness',
to: 0.5
}
}]
}],
tooltip: {
headerFormat: "",
pointFormat: 'The population of <b>{point.name}</b> is <b>{point.value}</b>'
}
});
请咨询。
答案 0 :(得分:2)
您可以对sunburst.prototype.drillUp方法进行包装,并在进行向上钻取之前或之后添加代码。
(function(H) {
H.wrap(H.seriesTypes.sunburst.prototype, 'drillUp', function (proceed) {
console.log("Before drillup.");
proceed.apply(this, Array.prototype.slice.call(arguments, 1));
console.log("After drillup.");
});
})(Highcharts);
包装原型函数文档:
https://www.highcharts.com/docs/extending-highcharts/extending-highcharts