Highcharts - 每秒更新曲线图
以下是每秒更新曲线图的示例。
我们在前面的章节已经了解了 Highcharts 基本配置语法。接下来让我们来看下 Highcharts 的其他配置。
配置
chart.events 配置
chart.event 属性中添加 load 方法（图表加载事件）。在 1000 毫秒内随机产生数据点并生成图表。
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);
}
}
}
示例
文件名:highcharts_dynamic_spline.htm
<html>
<head>
<title>Highcharts 教程</title>
<script src = "https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src = "https://code.highcharts.com/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>
以上图表实例的输出结果
❮ highcharts_dynamic_charts.html
