Highcharts - 突出显示范围内的鼠标位置 [英] Highcharts - highlight mouse position within a range

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问题描述

当鼠标位于HIighCharts折线图的xAxis范围内时,我需要突出显示鼠标位置。
我想显示一个圆圈来突出显示鼠标的位置。但我只希望这个功能只适用于过去25个xAxis值。



在Highcharts中可以这样做吗?



一种方法是通过下面的代码,但它有其局限性:

  var circle = chart.renderer.circle(0,0,5).attr({
fill:'blue',
stroke:'black',
'stroke-width': 1
})。add()
.toFront()
.hide();

$(chart.container).mousemove(function(event){
circle.attr({
x:event.offsetX,
y:event.offsetY $ b $(b)if(event.offsetX> SOME_VALUE)circle.show();
});

缺点是我比较event.offsetX而不是event.xAxis [0] .value ie我在比较页面中鼠标的xValue,而不是图表中的xAxis值。

预先致谢

解决方案您可以使用 point.plotX chart.plotLeft 图表,请参阅: http://jsfiddle.net/PNMAG/35/



片段:

  function addCircle(){
var chart = this;
var circle = chart.renderer.circle(0,0,5).attr({
fill:'blue',
stroke:'black',
'stroke-宽度':1
})。add()
.toFront()
.hide();

$(chart.container).mousemove(function(event){
var normalizedEvent = chart.pointer.normalize(event);

if(normalizedEvent。 chartX> chart.series [0] .data [5] .plotX + chart.plotLeft){
circle.attr({
x:normalizedEvent.chartX,
y:normalizedEvent.chartY
$}}。show();
} else {
circle.hide();
}
});

var chart = new Highcharts.Chart({
图表:{
renderTo:'container',
type:'area',
events :{
load:addCircle
}
},
series:[{
data:[29.9,71.5,106.4,129.2,144.0,176.0,135.6,148.5 ,216.4,194.1,95.6,54.4]
},{
数据:[71.5,106.4,129.2,144.0,176.0,135.6,148.5,216.4,194.1,95.6,54.4,20]
}]
});


I need to highlight mouse position when mouse is within a xAxis range of a line chart in HIighCharts. I want to display a circle to highlight the mouse position. But I want this functionality only for the last 25 xAxis values.

Is it possible to do this in Highcharts?

One way is by following code but it has its limitations:

var circle = chart.renderer.circle(0, 0, 5).attr({
    fill: 'blue',
    stroke: 'black',
        'stroke-width': 1
}).add()
    .toFront()
    .hide();

$(chart.container).mousemove(function (event) {
        circle.attr({
            x: event.offsetX,
            y: event.offsetY
        });
        if (event.offsetX > SOME_VALUE) circle.show();
    });

The shortcomings are that I am comparing event.offsetX instead of event.xAxis[0].value i.e. I am comparing the xValue of mouse in page rather than xAxis value in chart.

Thanks in advance

解决方案

You can use point.plotX and chart.plotLeft to get position on a chart, see: http://jsfiddle.net/PNMAG/35/

Snippet:

function addCircle() {
  var chart = this;
  var circle = chart.renderer.circle(0, 0, 5).attr({
      fill: 'blue',
      stroke: 'black',
      'stroke-width': 1
    }).add()
    .toFront()
    .hide();

  $(chart.container).mousemove(function(event) {
    var normalizedEvent = chart.pointer.normalize(event);

    if (normalizedEvent.chartX > chart.series[0].data[5].plotX + chart.plotLeft) {
      circle.attr({
        x: normalizedEvent.chartX,
        y: normalizedEvent.chartY
      }).show();
    } else {
      circle.hide();
    }
  });
}
var chart = new Highcharts.Chart({
  chart: {
    renderTo: 'container',
    type: 'area',
    events: {
      load: addCircle
    }
  },
  series: [{
    data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
  }, {
    data: [71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4, 20]
  }]
});

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