I have a Google LineChart with multiple lines. These points do not share the same X value's so i have to format my data in a certain way to make it work:
var data = google.visualization.arrayToDataTable([
["Y", "Your X & Y", "Product 1", "Product 2", "Product 3"],
[419, 589, null, null, null],
[386, null, 504, null, null],
[386, null, 526, null, null],
[387, null, 543, null, null],
[395, null, 564, null, null],
[402, null, 591, null, null],
[408, null, 612, null, null],
[378, null, null, 501, null],
[398, null, null, null, 600],
[460, null, null, null, 500]
]);
Now i want to add custom tooltips to these lines, i've tried adding an extra column and setting the role to tooltip.. but this only affects the first line.
see both charts (with and without tooltip): http://jsfiddle.net/TD92C/8/
How do i add custom tooltips for all lines? Thanks