不能强制HighCharts速度计为零

Can't force HighCharts Speedometer to Zero

本文关键字：速度计 HighCharts 不能      更新时间：2023-09-26

我正在使用highcharts速度计。我基本上是在装一个连接表。如果有一个良好的连接，那么仪表将在30和100之间跳动。如果连接返回任何(Ajax调用)而不是4 &200，应该会降到0。我的电话正在接通…当服务器启动时，一切正常。当我关闭Apache时，它不会归零。我在函数(图表)上测试了几个场景，看看它是否很简单(我确信它仍然是，我只是没有看到它)。什么都没起作用。我把图表的点设为0。但它仍然不会趋近于0。有什么建议吗?上帝啊，我希望如此。我希望明天能把它完成，然后我就可以在工作中使用它了。

<!DOCTYPE HTML>
<html>
        <head>
                <meta http-equiv="content-type" content="text/html; charset=UTF-8" >
                <title>Sales Meter</title>
                <script type="text/javascript" src="jquery-1.8.2.min.js"></script>
                <script type="text/javascript">
var flag;
var xmlhttp;
var url="http://192.168.0.5/ajax_info.txt"+'?_dc='+(new Date()).getTime();
//ajax call
function loadXMLDoc(url, cfunc){
   if(window.XMLHttpRequest){
      xmlhttp=new XMLHttpRequest();
   }
   else {
      xmlhttp=new ActiveObject("Microsoft.XMLHTTP");
   }
   xmlhttp.onreadystatechange=cfunc;
   xmlhttp.open("GET",url, true);
   xmlhttp.send();
}
function myFunction(){
   loadXMLDoc(url, function(){
      if(xmlhttp.readyState==4 && xmlhttp.status==200){
         flag = 1;
      }
   });
}
$(function () {
    var chart = new Highcharts.Chart({
            chart: {
                renderTo: 'container',
                type: 'gauge',
                plotBackgroundColor: null,
                plotBackgroundImage: null,
                plotBorderWidth: 0,
                plotShadow: false
            },
            title: {
                text: 'Sales-O-Meter'
            },
            pane: {
                startAngle: -150,
                endAngle: 150,
                background: [{
                    backgroundColor: {
                        linearGradient: { x1: 0, y1: 0, x2: 0, y2: 1 },
                        stops: [
                            [0, '#FFF'],
                            [1, '#333']
                        ]
                    },
                    borderWidth: 0,
                    outerRadius: '109%'
                }, {
                    backgroundColor: {
                        linearGradient: { x1: 0, y1: 0, x2: 0, y2: 1 },
                        stops: [
                            [0, '#333'],
                            [1, '#FFF']
                        ]
                    },
                    borderWidth: 1,
                    outerRadius: '107%'
                }, {
                    // default background
                }, {
                    backgroundColor: '#DDD',
                    borderWidth: 0,
                    outerRadius: '105%',
                    innerRadius: '103%'
                }]
            },
            // the value axis
            yAxis: {
                min: 0,
                max: 100,
                minorTickInterval: 'auto',
                minorTickWidth: 1,
                minorTickLength: 2.5,
                minorTickPosition: 'inside',
                minorTickColor: '#666',
                tickPixelInterval: 15,
                tickWidth: 1,
                tickPosition: 'inside',
                tickLength: 5,
                tickColor: '#666',
                labels: {
                    step: 5,
                    rotation: 'auto'
                },
                title: {
                    text: 'sales/min'
                },
                plotBands: [{
                    from: 0,
                    to: 10,
                    color: '#DF5353' // green
                }, {
                    from: 10,
                    to: 20,
                    color: '#DDDF0D' // yellow
                }, {
                    from:20,
                    to: 100,
                    color: '#55BF3B' // red
                }]
            },
            series: [{
                name: 'Speed',
                data: [80],
                tooltip: {
                    valueSuffix: ' sales/sec'
                }
            }]
        },
        // Add some life
        function (chart) {
            flag = 0;
            myFunction();
            setInterval(function () {
                if(flag==1){
                var point = chart.series[0].points[0],
                    newVal,
                    inc = Math.round((Math.random() - .5) * 20);
                newVal = point.y + inc;
                if (newVal < 0 || newVal > 100) {
                    newVal = point.y - inc;
                }
                point.update(newVal);
                }
                else{
                   var point = chart.series[0].points[0],
                      newVal = 0,
                      inc = 0;
                   point.update(newVal);
                }
            }, 1000);
        });
});
                </script>
        </head>
        <body>
<script src="highcharts.js"></script>
<script src="highcharts-more.js"></script>
<!--<script src="exporting.js"></script>-->
<div id="container" style="width: 500px; height: 400px; margin: 0 auto"></div>
        </body>
</html>

看起来你需要在SETI热函数中调用我的函数，因为它需要被调用来设置标志。

    function (chart) {
        flag = 0;    
        setInterval(function () {
            myFunction();
            if(flag==1){
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