[jfreechart-dev] Date Format on a TimeSeries chart

[Justin J. <ju...@st...>]

Dave,

I've been scouring the newsgroups trying to figure this out, and I'm still
stumped.  I have a timeseries chart display data for every half hour.  The
dates display as hh:mm, but I want to display the date at automatically
determined periods.  I had a servlet that would display the date at the
beginning of the week if I was viewing a month of data, and every month if
viewing a year of data, etc... and it appeared to be computing it
automatically, not based on my code.

I see how to set the format using code like the following:

TickUnits tickUnits = new TickUnits();
      tickUnits.add(new DateTickUnit(DateTickUnit.SECOND,500,new
SimpleDateFormat("yyyy-MM-dd HH:mm:ss z")));
      ((DateAxis)domainAxis).setStandardTickUnits(tickUnits);

But I don't want to have to specify when to display the label, just how to
display them.

Is there a way to have jfreechart do the work for me?  Like, it knows what
format to use and when to use it.

Thanks.
Justin