我创建了一个图表,其中包含多个系列的highcharts x范围图。工具提示显示在类别中间的上方。我希望它显示在每个x范围点上方。我该怎么办?
我尝试覆盖工具提示定位器。但是参数点包含值plotX和plotY,就像放在y值的中间一样,我无法计算其实际位置。
this.tooltipPositioner = function(labelWidth, labelHeight, point){
return {
x: point.plotX,
y: point.plotY
};
};
答案 0 :(得分:1)
您可以使用tooltip.positioner
,但可以使用悬停的点对象代替实参点,在这里您将找到正确的点图值。要获取悬停的点对象,请使用plotOptions.series.point.events.mouseOver
回调。查看下面发布的代码和演示:
HTML:
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/xrange.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<div id="container"></div>
JS:
var hoveredPoint;
var chart = Highcharts.chart('container', {
chart: {
type: 'xrange'
},
title: {
text: 'Highcharts X-range'
},
xAxis: {
type: 'datetime'
},
yAxis: {
title: {
text: ''
},
categories: ['Prototyping', 'Development', 'Testing'],
reversed: true
},
tooltip: {
positioner: function(labelWidth, labelHeight) {
var x = hoveredPoint.shapeArgs.x,
y = hoveredPoint.shapeArgs.y,
width = hoveredPoint.shapeArgs.width,
tooltipOffsetTop = -10;
return {
x: x + chart.plotLeft + width / 2 - labelWidth / 2,
y: y + chart.plotTop - labelHeight + tooltipOffsetTop
}
}
},
plotOptions: {
xrange: {
point: {
events: {
mouseOver: function() {
hoveredPoint = this;
},
mouseOut: function() {
hoveredPoint = null;
}
}
}
}
},
series: [{
name: 'Project 1',
// pointPadding: 0,
groupPadding: 0,
borderColor: 'gray',
pointWidth: 20,
data: [{
x: Date.UTC(2014, 10, 21),
x2: Date.UTC(2014, 11, 2),
y: 0,
partialFill: 0.25
}, {
x: Date.UTC(2014, 11, 2),
x2: Date.UTC(2014, 11, 5),
y: 1
}, {
x: Date.UTC(2014, 11, 8),
x2: Date.UTC(2014, 11, 9),
y: 2
}, {
x: Date.UTC(2014, 11, 9),
x2: Date.UTC(2014, 11, 19),
y: 1
}, {
x: Date.UTC(2014, 11, 10),
x2: Date.UTC(2014, 11, 23),
y: 2
}],
dataLabels: {
enabled: true
}
},
{
name: 'Project 2',
// pointPadding: 0,
// groupPadding: 0,
borderColor: 'gray',
pointWidth: 20,
data: [{
x: Date.UTC(2014, 10, 23),
x2: Date.UTC(2014, 11, 2),
y: 0,
partialFill: 0.25
}],
dataLabels: {
enabled: true
}
}
]
});