You can use the HTML tooltips, but you have to assign them to the domain
column, not the data columns. See example here:
http://jsfiddle.net/asgallant/q85yL/. Note that in the example code, there
is very little reason to include a second domain column (I left it in for
consistency with the code you posted, but it can be removed without
affecting anything in the chart).
On Wednesday, March 27, 2013 6:15:41 PM UTC-4, Oliver Chang wrote:
>
> Hi,
>
> I have a question about how to customize a line chart with two series when
> the focusTarget: "category" option is set. Is there a way to customize the
> display of the tooltip like there is when focusTarget is set to datum?
> Using a column set to the tooltip role doesn't seem to work since that just
> returns the default tooltip with raw HTML, instead of the customized,
> rendered HTML tooltip.
>
> For example, taking an example from the Data Roles docs,
>
> google.load('visualization', '1.1', {'packages':['corechart']});
>
> google.setOnLoadCallback(drawChart_C6);
>
> function drawChart_C6() {
> var data = new google.visualization.DataTable();
> data.addColumn({type: 'string', role: 'domain'}, '2009 Quarter');
> data.addColumn('number', '2009 Sales');
> data.addColumn('number', '2009 Expenses');
> data.addColumn({type: 'string', role: 'domain'}, '2008 Quarter');
> data.addColumn('number', '2008 Sales');
> data.addColumn('number', '2008 Expenses');
>
> // tooltip column
> data.addColumn({ type: "string", role: "tooltip", p: { html: true }});
>
> data.addRows([
> ['Q1 \'09', 1000, 400, 'Q1 \'08', 800, 300, "<h1>tooltip</h1>"],
> ['Q2 \'09', 1170, 460, 'Q2 \'08', 750, 400, "<h1>tooltip</h1>"],
> ['Q3 \'09', 660, 1120, 'Q3 \'08', 700, 540, "<h1>tooltip</h1>"],
> ['Q4 \'09', 1030, 540, 'Q4 \'08', 820, 620, "<h1>tooltip</h1>"]
> ]);
>
> var chart = new google.visualization.LineChart(document.getElementById
> ('visualization'));
> chart.draw(data, {width: 400, height: 240, legend:'right', focusTarget
> : 'category', tooltip: {isHtml: true}});
> }
>
> Is what I'm asking possible using a category focusTarget? Thanks in
> advance.
>
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