always visible tooltip on google chart on page load?

问题

Is there any way to make google charts tooltip always visible, no matter where the mouse pointer is? it should be constantly on after page load

回答1:

The best I could come up with is:

http://jsfiddle.net/xDfLd/

But if you interact with the chart (ie, click on different pie segments, or different line segments), the tooltip will disappear. Setting enableInteractivity:false I'll file a bug that tooltips and selections should still display when interactivity is off anyway.

回答2:

I combined what Jeremy posted with Yasen's comment and came to this solution:

var options = {
  enableInteractivity: false,
  selectionMode: 'multiple',
  tooltip: {
    trigger: 'selection'
  }
};

google.visualization.events.addListener(chart, 'ready', function(e) {
  var selected_rows = [];
  for (var i = 0; i < your_total_number_of_rows - 1; i++) {
    selected_rows.push({row: i, column: null});
  }
  chart.setSelection(selected_rows);
});

chart.draw(data, options);

This shows all the tooltips on load and prevents the user from messing around with them. Works great with the Pie Chart.

回答3:

Use tooltip: { trigger: 'selection' } when defining options for the chart.

来源：https://stackoverflow.com/questions/22635602/always-visible-tooltip-on-google-chart-on-page-load