Javascript 谷歌图表行与缩放和选择事件

我构建了一个折线图，当点击这些点时会发出警报，效果很好

问题是当我添加“资源管理器”选项（下面的注释行）以启用图表上的滚动缩放时：

select

事件不会触发，单击也不再有效（）

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请勾选此项

在注册select事件后放置draw方法

//select event
google.visualization.events.addListener(chart, 'select', function(e) {
  var selection = chart.getSelection();     
  if (selection.length > 0) {
    var estrutura = data_estruturas.getValue(selection[0].row, 0)
    alert(estrutura);
  }
});

//After set all options and register events draw the chart
chart.draw(data_estruturas, options);

//select event
google.visualization.events.addListener(chart, 'select', function(e) {
  var selection = chart.getSelection();     
  if (selection.length > 0) {
    var estrutura = data_estruturas.getValue(selection[0].row, 0)
    alert(estrutura);
  }
});

//After set all options and register events draw the chart
chart.draw(data_estruturas, options);