几周前我和Highcharts和Highstock合作。一步一步,按照文档和在线帮助,我已经建立了一些有趣的选项图表。但现在我有一个问题,我的mysql和php技能有限。
我每分钟从数据库中获取温度值。我使用php文件连接数据库,然后构建图表。现在,我想像in this example更新图表。但我找不到正确的方法。我正在读Highcharts文档,而Stackoverflow有一些答案,但我无法实现我的代码。
我正在以两种方式实现动态更新。第一个是:
<?php
function conectarBD(){
$server = "localhost";
$usuario = "user";
$pass = "password";
$BD = "databasename";
$conexion = mysqli_connect($server, $usuario, $pass, $BD);
if(!$conexion){
echo 'Ha sucedido un error inexperado en la conexion de la base de datos<br>';
}
return $conexion;
}
function desconectarBD($conexion){
$close = mysqli_close($conexion);
if(!$close){
echo 'Ha sucedido un error inexperado en la desconexion de la base de datos<br>';
}
return $close;
}
function getArraySQL($sql){
$conexion = conectarBD();
if(!$result = mysqli_query($conexion, $sql)) die();
$rawdata = array();
$i=0;
while($row = mysqli_fetch_array($result))
{
$rawdata[$i] = $row;
$i++;
}
desconectarBD($conexion);
return $rawdata;
}
$sql = "SELECT Probe1,Time from table2;";
$rawdata = getArraySQL($sql);
for($i=0;$i<count($rawdata);$i++){
$time = $rawdata[$i]["Time"];
$date = new DateTime($time);
$rawdata[$i]["Time"]=$date->getTimestamp()*1000;
}
?>
<HTML>
<BODY>
<meta charset="utf-8">
<script src="https://code.jquery.com/jquery.js"></script>
<script src="http://code.highcharts.com/stock/highstock.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<div id="container">
</div>
<script type='text/javascript'>
$(function () {
$(document).ready(function() {
Highcharts.setOptions({
global: {
useUTC: false
}
});
var chart;
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function () {
var series = this.series[0];
setInterval(function () {
<?php
for($i = 0 ;$i<count($rawdata);$i++){
?>
series.addPoint([<?php echo $rawdata[$i]["Time"];?>,<?php echo $rawdata[$i]["Probe1"];?>], true, true);
<?php } ?>
}, 90000);
}
}
},
title: {
text: 'Tunnel temperature'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'ºC'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function() {
return '<b>'+ this.series.name +'</b><br/>'+
Highcharts.dateFormat('%d-%b %H:%M', this.x) +'<br/>'+
'<b>'+ Highcharts.numberFormat(this.y, 1) +'</b>';
}
},
legend: {
enabled: true
},
exporting: {
enabled: true
},
series: [{
name: 'Probe-1',
data: (function() {
var data = [];
<?php
for($i = 0 ;$i<count($rawdata);$i++){
?>
data.push([<?php echo $rawdata[$i]["Time"];?>,<?php echo $rawdata[$i]["Probe1"];?>]);
<?php } ?>
return data;
})()
}]
});
});
});
</script>
</html>
另一种方式:
与datatest2.php的连接:
<?php
//convert the date values to Unix Timestamp
//Convert from 2017-02-28 19:30:01 to Tuesday, February 28 2017 19:30:01
$con = mysql_connect("localhost","username","password");
if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("databasename", $con);
$result = mysql_query("SELECT * FROM table2");
while ($row = mysql_fetch_array($result)) {
$uts=strtotime($row['Time']); //convertir a Unix Timestamp
$date=date("l, F j Y H:i:s",$uts);
//echo $valor3 . “\t” . $row[$valor2]. “\n”;
echo $date . "\t" . $row['Probe1'] . "\n";
}
mysql_close($con); ?>
图表的php文件:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Highstock & multiple</title>
<script src="https://code.jquery.com/jquery.js"></script>
<script src="http://code.highcharts.com/stock/highstock.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<script type="text/javascript">
var chart;
$(document).ready(function() {
var options = {
chart: {
renderTo: 'container',
defaultSeriesType: 'line',
marginRight: 130,
marginBottom: 25
},
title: {
text: 'Temperature Tunnel',
x: -20 //center
},
subtitle: {
text: '',
x: -20
},
rangeSelector: {
buttons: [
{
type: 'all',
text: 'all'
}, {
type: 'week',
count: 1,
text: '1w'
}, {
type: 'day',
count: 1,
text: '1d'
}, {
type: 'hour',
count: 18,
text: '18h'
}, {
type: 'hour',
count: 12,
text: '12h'
}, {
type: 'hour',
count: 6,
text: '6h'
}]
},
xAxis: {
type: 'datetime',
tickWidth: 0,
gridLineWidth: 1,
labels: {
align: 'center',
x: -3,
y: 20,
formatter: function() {
return Highcharts.dateFormat('%d-%b %H:%M', this.value);
}
}
},
yAxis: {
title: {
text: 'Celsius degrees'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function() {
return Highcharts.dateFormat('%d-%b %H:%M', this.x) +': <b>'+ this.y + '</b>';
}
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'top',
x: -10,
y: 100,
borderWidth: 0
},
series: [{
name: 'Probe1'
}]
}
jQuery.get('datatest2.php', null, function(tsv) {
var lines = [];
traffic = [];
try {
// split the data return into lines and parse them
tsv = tsv.split(/\n/g);
jQuery.each(tsv, function(i, line) {
line = line.split(/\t/);
date = Date.parse(line[0] +' UTC');
traffic.push([
date,
parseInt(line[1].replace(',', ''), 10)
]);
});
} catch (e) { }
options.series[0].data = traffic;
chart = Highcharts.stockChart (options);
setInterval(function() { tsv; }, 30000);
pollChart.series[0].setData(data);
});
});
</script>
</head>
<body>
<div id="container" style="width: 100%; height: 400px; margin: 0 auto"></div>
</body>
</html>
你能帮我找到并修复错误吗? 谢谢! 亚历克斯。
答案 0 :(得分:0)
使用您发布的第一个示例和JSFiddle的组合,我会尝试这样的事情:
chart: {
events: {
load: function () {
var series = this.series[0];
setInterval(function () {
<?php
for($i = 0 ;$i<count($rawdata);$i++){
?>
series.addPoint([<?php echo $rawdata[$i]["Time"];?>,<?php echo $rawdata[$i]["Probe1"];?>], true, true);
<?php } ?>
}, 1000);
}
}
}
请注意,我不知道您的PHP代码是否实际上正在检索您想要的数据,我只是从您的示例中复制它并假设该部分代码没问题。
这里的关键是chart.events.load
属性,这需要一个在图表加载完毕后触发的函数。通过在此处调用setInterval
,您的函数将在图表首次加载后连续触发。
通过调用series.addPoint
,每次添加新点时,您的图表都会重绘,我相信这就是您想要的。
有关load
属性的更多信息here。