单击按钮即可显示Google图表工具提示

时间:2019-06-24 16:27:19

标签: charts google-visualization

我正在使用Google可视化图表(甜甜圈图表)

图表具有工具提示

单击按钮,我们可以动态显示工具提示吗?

google.load("visualization", "1", {
    packages: ["corechart"]
});
google.setOnLoadCallback(drawChart);

function drawChart() {
    var data = new google.visualization.DataTable();
    data.addColumn('string', 'Task');
    data.addColumn('number', 'Hours per Day');
    data.addRows([
        ['A', roundNumber(11 * Math.random(), 2)],
        ['B', roundNumber(2 * Math.random(), 2)],
        ['C', roundNumber(2 * Math.random(), 2)],
        ['D', roundNumber(2 * Math.random(), 2)],
        ['E', roundNumber(7 * Math.random(), 2)]
        ]);
    var options = {
        width: 450,
        height: 300,
        colors: ['#ECD078','#ccc','#C02942','#542437','#53777A'],
        legend: {position:'none'},
        pieHole: 0.4,
        animation: {duration:800,easing:'in'}
    };
    var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
    chart.draw(data, options);
}

function roundNumber(num, dec) {
    var result = Math.round(num * Math.pow(10, dec)) / Math.pow(10, dec);
    return result;
}

$(document).ready(function(){
  $("#button").click(function(){
   alert('show tool tips')
  });
});

http://jsfiddle.net/kcjr90sx/1/

1 个答案:

答案 0 :(得分:1)

首先,需要使用最新版本的Google图表,
jsapi加载程序已过时,不应再使用。

改为使用-> <script src='https://www.gstatic.com/charts/loader.js'></script>

这只会更改load语句。
有关更多信息,请参见以下片段和update library loader code


接下来,我们可以使用以下选项允许在选择切片时显示工具提示...

tooltip: {
  trigger: 'both'
}

我们可以使用以下选项选择多个切片...

selectionMode: 'multiple',

然后,当我们单击按钮时,我们选择切片,其中显示了工具提示。

google.charts.load('current', {
  packages:['corechart']
}).then(function () {
  var data = new google.visualization.DataTable();
  data.addColumn('string', 'Task');
  data.addColumn('number', 'Hours per Day');
  data.addRows([
    ['A', roundNumber(11 * Math.random(), 2)],
    ['B', roundNumber(2 * Math.random(), 2)],
    ['C', roundNumber(2 * Math.random(), 2)],
    ['D', roundNumber(2 * Math.random(), 2)],
    ['E', roundNumber(7 * Math.random(), 2)]
  ]);
  var options = {
    width: 450,
    height: 300,
    colors: ['#ECD078','#ccc','#C02942','#542437','#53777A'],
    legend: {position:'none'},
    pieHole: 0.4,
    animation: {duration:800,easing:'in'},
    selectionMode: 'multiple',
    tooltip: {
      trigger: 'both'
    }
  };
  var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
  google.visualization.events.addListener(chart, 'ready', function () {
    $("#button").click(function(){
      var selection = [];
      $.each(new Array(data.getNumberOfRows()), function (rowIndex) {
        if (data.getValue(rowIndex, 1) > 0) {
          selection.push({row: rowIndex});
        }
      });
      chart.setSelection(selection);
    });
  });
  chart.draw(data, options);
});

function roundNumber(num, dec) {
  var result = Math.round(num * Math.pow(10, dec)) / Math.pow(10, dec);
  return result;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src='https://www.gstatic.com/charts/loader.js'></script>
<div id="button" data-role="button">Show Tool Tips</div>
<div id='chart_div'></div>

注意:您还应该等待图表的'ready'事件,
在分配按钮单击事件之前。
否则,将引发错误。