Highcharts dynamic diagram
May 09, 2021 Highcharts
Table of contents
Highcharts dynamic diagram
In this section, we'll introduce you to the dynamic diagram of Highcharts.
We've already learned about the Highcharts configuration syntax in the previous sections. Let's look at the other configurations of Highcharts.
Update the graph every second
chart.events
Add the load method (chart load event) to the chart.event property. Randomly generate data points and charts in 1000 milliseconds.
chart: {
events: {
load: function () {
// 图表每秒更新一次
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // 当期时间
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
}
}
}
Instance
File name: highcharts_dynamic_spline.htm
<html>
<head>
<title>Highcharts 教程 | W3Cschool教程(w3cschool.cn)</title>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js" rel="external nofollow" rel="external nofollow" ></script>
<script src="/try/demo_source/highcharts.js"></script>
</head>
<body>
<div id="container" style="width: 550px; height: 400px; margin: 0 auto"></div>
<script language="JavaScript">
$(document).ready(function() {
var chart = {
type: 'spline',
animation: Highcharts.svg, // don't animate in IE < IE 10. marginRight: 10, events: { load: function () { // set up the updating of the chart each second var series = this.series[0]; setInterval(function () { var x = (new Date()).getTime(), // current time y = Math.random(); series.addPoint([x, y], true, true); }, 1000); } } }; var title = { text: 'Live random data' }; var xAxis = { type: 'datetime', tickPixelInterval: 150 }; var yAxis = { title: { text: 'Value' }, plotLines: [{ value: 0, width: 1, color: '#808080' }] }; var tooltip = { formatter: function () { return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
};
var plotOptions = {
area: {
pointStart: 1940,
marker: {
enabled: false,
symbol: 'circle',
radius: 2,
states: {
hover: {
enabled: true
}
}
}
}
};
var legend = {
enabled: false
};
var exporting = {
enabled: false
};
var series= [{
name: 'Random data',
data: (function () {
// generate an array of random data
var data = [],time = (new Date()).getTime(),i;
for (i = -19; i <= 0; i += 1) { data.push({ x: time + i * 1000, y: Math.random() }); } return data; }()) }]; var json = {}; json.chart = chart; json.title = title; json.tooltip = tooltip; json.xAxis = xAxis; json.yAxis = yAxis; json.legend = legend; json.exporting = exporting; json.series = series; json.plotOptions = plotOptions; Highcharts.setOptions({ global: { useUTC: false } }); $('#container').highcharts(json); }); </script>
</body>
</html>
The output of the above examples is:
Highcharts pie chart
Add data by clicking
chart.events
Add the click method (click events that occur on the plot area of the entire chart) to the chart.event property. T his method adds new data points when a click occurs on the chart plot area.
chart: {
events: {
click: function (e) {
// 获取点击坐标和数据项
var x = e.xAxis[0].value,
y = e.yAxis[0].value,
series = this.series[0];
// 添加点击的坐标
series.addPoint([x, y]);
}
}
}
Instance
File name: highcharts_dynamic_click.htm
<html>
<head>
<title>Highcharts 教程 | W3Cschool教程(w3cschool.cn)</title>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js" rel="external nofollow" rel="external nofollow" ></script>
<script src="/try/demo_source/highcharts.js"></script>
</head>
<body>
<div id="container" style="width: 550px; height: 400px; margin: 0 auto"></div>
<script language="JavaScript">
$(document).ready(function() {
var chart = {
type: 'scatter',
margin: [70, 50, 60, 80],
events: {
click: function (e) {
// find the clicked values and the series
var x = e.xAxis[0].value,
y = e.yAxis[0].value,
series = this.series[0];
// Add it
series.addPoint([x, y]);
}
}
};
var title = {
text: 'User supplied data'
};
var subtitle = {
text: 'Click the plot area to add a point. Click a point to remove it.'
};
var xAxis = {
gridLineWidth: 1,
minPadding: 0.2,
maxPadding: 0.2,
maxZoom: 60
};
var yAxis = {
title: {
text: 'Value'
},
minPadding: 0.2,
maxPadding: 0.2,
maxZoom: 60,
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
};
var legend = {
enabled: false
};
var exporting = {
enabled: false
};
var plotOptions = {
series: {
lineWidth: 1,
point: {
events: {
'click': function () {
if (this.series.data.length > 1) {
this.remove();
}
}
}
}
}
};
var series= [{
data: [[20, 20], [80, 80]]
}];
var json = {};
json.chart = chart;
json.title = title;
json.subtitle = subtitle;
json.xAxis = xAxis;
json.yAxis = yAxis;
json.legend = legend;
json.exporting = exporting;
json.series = series;
json.plotOptions = plotOptions;
$('#container').highcharts(json);
});
</script>
</body>
</html>
The output of the above examples is: