javascript-独立Divs中Google可视化图表的多个实例

我试图在同一屏幕上的不同div中显示多个Google Gauge charts.我还需要处理这些div上的click事件(因此是图表).我尝试动态地执行此操作,但是遇到了一些问题.但是无论如何,即使我尝试静态地执行此操作(有效),我仍然无法使图表区域可单击.发生的事情是整个div除了图表区域之外都是可单击的.

无论如何,这是我的(messy-test)代码：

<div id="gaugePlaceHolder" class="gaugeWrapper"></div>
<div id="gaugePlaceHolder2" class="gaugeWrapper"></div>

document.getElementsByClassName = function (cl) {
    var retnode = [];
    var myclass = new RegExp('\\b' + cl + '\\b');
    var elem = this.getElementsByTagName('*');
    for (var i = 0; i < elem.length; i++) {
        var classes = elem[i].className;
        if (myclass.test(classes)) retnode.push(elem[i]);
    }
    return retnode;
};


  google.load('visualization', '1', {packages:['gauge']});
  google.setonLoadCallback(function () {
      drawChart1();
      drawChart2();
  });
  function drawChart1() {
    var data = google.visualization.arrayToDataTable([
      ['Label', 'Value'],
      ['Memory', 80]
    ]);

    var options = {
      width: 400, height: 120,
      redFrom: 90, redTo: 100,
      yellowFrom:75, yellowTo: 90,
      minorTicks: 5
    };

  var chart = new google.visualization.Gauge(document.getElementById('gaugePlaceHolder'));
    chart.draw(data, options);
}

function drawChart2() {
    var data = google.visualization.arrayToDataTable([
      ['Label', 'Value'],
      ['Another', 30]
    ]);

    var options = {
        width: 400, height: 120,
        redFrom: 90, redTo: 100,
        yellowFrom: 75, yellowTo: 90,
        minorTicks: 5
    };

    var chart = new google.visualization.Gauge(document.getElementById('gaugePlaceHolder2'));
    chart.draw(data, options);
}

window.onload = function () {
    var elements = $('.gaugeWrapper');
    console.log(elements);
    elements.click(function () {
        alert("clicked");
    });
}

有任何解释/建议吗？

解决方法:

将监听器添加到仪表的正确方法是使用google.visualization.events.addListener方法,如this example所示.

您也可以在Google Playground上尝试您的代码.