I am using Highcharts to draw a line graph.
When the page loads, the line graph is drawn. Please note, that i got an y-Value for every x-Value starting from 0 till 700 ( 0,1,2,3,…,700). This is how i create the graph:
chart = new Highcharts.Chart({
chart: {
renderTo: 'container',
animation: false,
type: 'line',
marginTop: null,
marginRight: 55,
marginBottom: 50,
marginLeft: 80,
backgroundColor: backgroundColor,
spacingTop: 10,
spacingRight: 10,
spacingBottom: 15,
spacingLeft: 10,
},
title: {
text: ' Graph',
style: {color: graphLabelColor},
x: -20 //center
},
xAxis: {
title: {
text: 'xAXIS',
style: {
color: axisLabelColor
},
},
min:0,
max: 600,
gridLineColor: gridLineColor,
minorTickInterval: 50,
minorTickLength: 1,
tickInterval: 100,
minorGridLineWidth: 0,
gridLineWidth: 1,
lineColor: axisColor,
labels: {
style : {
color: axisColor
}
},
plotLines: [{
value: 0,
width: 0,
color: axisColor
}]
},
yAxis: {
title: {
text: 'yAxis',
style: {color:
axisLabelColor
},
},
min:0,
max: 700,
gridLineColor: gridLineColor,
lineColor: axisColor,
minorTickInterval: 50,
minorTickLength: 1,
minorGridLineWidth: 0,
tickInterval: 100,
labels: {
style: {
color: axisColor
}
},
plotLines: [{
value: 0,
width: 0,
color: axisColor
}]
},
exporting: {
enabled: false
},
tooltip: {
enabled: true,
borderColor: crosshairColor,
crosshairs: [{
width: 1,
color: crosshairColor,
},
{
width: 1,
color: crosshairColor,
}],
formatter: function() {
return '<b>'+ this.series.name +'</b><br/>'+this.y +' & '+ this.x.toFixed(0);
}
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'top',
x: -10,
y: 100,
borderWidth: 1,
borderColor: plotlineColor,
enabled: false,
floating: true,
shadow: true
},
plotOptions: {
series: {
enableMouseTracking: true
},
line: {
color:plotlineColor,
},
},
series: [{
lineWidth: 2,
name: carname,
data: dataArray,
marker: {
color:crosshairColor,
radius: 1
}
}]
});
In my HTML-Page I got two buttons to increase/decrease (+1/-1) a number in a textfield, starting at 200. The number represents a x-Coordinate in the graph.
I would like to highlight the shown number of my textfield in the graph with another color and a bigger point when the graph is loaded the first time and also when the user changes the number using one of these buttons. How can I do this?
I tried
chart.series[0].options.data[valueOfTextfield].color = 'yellow';
chart.redraw(true);
in the onclick method of the buttons but it doesnt work.
Thanks for your answers!
use the select method of the point object
https://api.highcharts.com/highcharts/series.line.point.events.select