I have created a line chart with tooltips which works fine using the
DataTable.AddColumn method with role specified as follows:
data.addColumn({type:
'string', role: 'tooltip'});
However, when I change from the standard line chart to the Material line
chart, the tooltips aren't recognised, even though I specified chart.draw(data,
google.charts.Line.convertOptions(options)); as recommended in the
documentation. Am I missing something? I like the look of Material charts,
but not having tooltips is a big drawback.
Similarly, I would like to find a way of including tooltips in annotation
charts, while turning off the annotation text. At present, when I try that
API with the same table that has tooltip roles specified in its 'string'
columns, the annotation chart seems to force it to become annotation text
which I don't want.
All help appreciated.
Nick
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