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You mean a chart like this: https://www.cisl.ucar.edu/news/02/fotoweek/0628.chart.gif Then just plot the values of an exponential function. Slope and intercept are mathematical properties of (linear) functions, check here https://www.google.com/search?q=slope+intercept&gws_rd=ssl I do not think that...

I know that Gantt chart tooltips with subtask info has been asked for multiple times, I've looked through most of the questions and replies, but I still cannot get it working. I tried the solution given by Craig here http://www.jfree.org/phpBB2/viewtopic.php?f=3&t=13017&hilit=index+of+subtask but I ...