如何在将鼠标悬停在highchart上时获得线条的值

Question

我有一个有三条线的图。我想在图形下面显示鼠标悬停的线的值。

http://jsfiddle.net/pntuz40L/

$(function () {
$('#container').highcharts({
title: {
text: 'Monthly Average Temperature',
x: -20 //center
},
subtitle: {
text: 'Source: WorldClimate.com',
x: -20
},
xAxis: {
categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
},
yAxis: {
title: {
text: 'Temperature (°C)'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
series: [{
data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6]
}, {
data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8, 24.1, 20.1, 14.1, 8.6, 2.5]
}, {

data: [-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6, 17.9, 14.3, 9.0, 3.9, 1.0]
}, {

lineColor: 'red',
data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 16.6, 14.2, 10.3, 6.6, 4.8]
}]
});
});

Answer 1

根据您的需求，您可以通过使用point.mouseOver()或series.mouseOver()事件来实现：

下面是一个获取点的序列和值信息的示例，并将它们显示在图表下方的div中：

plotOptions: {
series: {
point: {
events: {
mouseOver() {
var div = document.getElementById('info');
div.innerHTML = "Series: " + this.series.name + "</br>" + "x: " + this.x + "</br>" + "y: " + this.y;
return div.innerHTML
}
}
}
}
},

演示：https://jsfiddle.net/BlackLabel/xvymqb3n/

API参考：https://api.highcharts.com/highcharts/plotOptions.series.point.events.mouseOverhttps://api.highcharts.com/highcharts/plotOptions.series.events.mouseOver