javascript - Show tooltip on load with google charts -

i'm trying use tooltip.trigger = 'selection' , setselection([{row:4,column:null}]), tooltip doesn't show automatically. when click on tooltip.

here's jsfiddle showing problem.

any ideas can try?

thanks!

i ended using annotations. though interested in tooltips if figures out way.

jsfiddle

var gmapdata = [[{"label":"date","type":"date"},"one",{"role":"annotation","type":"string"},"two",{"role":"annotation","type":"string"},"three",{"role":"annotation","type":"string"}],["date(2012, 3, 26)",412,null,278,null,149,null],["date(2012, 3, 27)",410,null,272,null,147,null],["date(2012, 3, 30)",414,null,280,null,146,null],["date(2012, 4, 1)",406,"$406",268,"$268",141,"$141"]];      drawchart();      function drawchart() {         var data = window.data = google.visualization.arraytodatatable(gmapdata);          // apply tooltip formatting         var formatter = new google.visualization.numberformat({pattern: '$#,###'});         var cols = (gmapdata[0].length-1) / 2;         x = cols;         // apply tooltip formatting         while ((--x) >= 0)             formatter.format(data, x*2+1);          var options = {             title: 'number watch',             legend: { position: 'bottom' },             interpolatenulls: true,             curvetype: 'function',             selectionmode: 'single',             tooltip: {trigger: 'focus'},             focustarget: 'category',             annotations: {                 textstyle: {                     fontsize: 18                 }             },             vaxis: {format: '$#,###'},             width: 400,             height: 300         };          var chart = window.chart = new google.visualization.linechart(document.getelementbyid('num_watch'));         chart.draw(data, options);     } 

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github issue reply:

hi,

this known bug focustarget: 'category'. particular option uses mouse position signal how position tooltip, , programmatic selection won't trigger tooltip display.

to circumvent issue, use multiple selection on first load. here's example of this, along reset changes focustarget 'category' @ first opportunity: http://jsfiddle.net/b1kt6mrl/

jsfiddle:

// ..... previous code, not annotations chart.draw(data, options); chart.setselection([{row:4, column:1}, {row:4, column:2}, {row:4, column:3}]);  google.visualization.events.addonetimelistener(chart, 'onmouseover', function() {     var selection = chart.getselection();     options.focustarget = 'category';     options.selectionmode = 'single';     google.visualization.events.addonetimelistener(chart, 'ready', function() {         chart.setselection(selection);     });     chart.draw(data, options); });