BarChart and ColumnChart objects from Google's visualization API doesn't support allowHtml option, which is required to be able to properly insert links into the chart. See http://code.google.com/apis/visualization/documentation/gallery/barchart.html#Configuration_Options for the options.
See diff on https://pastebin.canonical.com/28332/ for what the code would look like if the BarChart accepted the allowHtml option.
BarChart and ColumnChart objects from Google's visualization API doesn't support allowHtml option, which is required to be able to properly insert links into the chart. See http:// code.google. com/apis/ visualization/ documentation/ gallery/ barchart. html#Configurat ion_Options for the options.
See diff on https:/ /pastebin. canonical. com/28332/ for what the code would look like if the BarChart accepted the allowHtml option.