javascript - Tooltips for multiple lines Google Line Chart -

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i wondering if knows how go adding tooltips multiple lines of data google line charts using datatable, addcolumn , addrow?

i've seen done using other methods, quite hard in project , feel dumbass not figuring out. anyways, i've dumbed down code present essentials of problem.

as see, tooltip shows line 2, not line 1. question this: how add tooltip line 1 using method? code: http://jsfiddle.net/qquse/550/

<html> <head> <script type="text/javascript" src="https://www.google.com/jsapi"></script> <script type="text/javascript">     function drawchart() {         var data = new google.visualization.datatable();         data.addcolumn('number', 'y');         data.addcolumn('number', 'line 1');         data.addcolumn('number', 'line 2');         data.addcolumn({type: 'string', role: 'tooltip'});         data.addrow([1, 1, 2, "some fancy tooltip"]);         data.addrow([2, 2, 4, "some fancy tooltip"]);         data.addrow([3, 3, 6, "some fancy tooltip"]);         data.addrow([4, 4, 8, "some fancy tooltip"]);         data.addrow([5, 5, 10, "some fancy tooltip"]);         var options = {             title: 'graph'         };         var chart = new google.visualization.linechart(document.getelementbyid('chart'));        chart.draw(data, options);     }     google.load("visualization", "1", {packages: ["corechart"]});     google.setonloadcallback(drawchart); </script> </head> <body> <div id="chart"></div> </body> </html>

i tried adding both datacolumns first, tooltips. turns out had in order:

data.addcolumn('number', 'y'); data.addcolumn('number', 'line 1'); data.addcolumn({type: 'string', role: 'tooltip'}); data.addcolumn('number', 'line 2'); data.addcolumn({type: 'string', role: 'tooltip'});

instead of

data.addcolumn('number', 'y'); data.addcolumn('number', 'line 1'); data.addcolumn('number', 'line 2'); data.addcolumn({type: 'string', role: 'tooltip'}); data.addcolumn({type: 'string', role: 'tooltip'});

updated working fiddle: http://jsfiddle.net/qquse/1207/


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