How can i add text in category plot?

Sarika · Post by **Sarika** » Tue May 31, 2005 12:32 pm

In chart if some values plotted are null then i want to print
some message or text before category axis label.

Like if in bar chart if value is null then i want to print "null"
Help me to solve this problem

David sir can u plz suggest some ideas

Thanx

Post by **david.gilbert** » Tue May 31, 2005 5:27 pm

You'll need to customise the renderer (in the drawItem() method). Most renderers just return when a null value is found, which results in nothing being drawn. If you modify the code, you can check for that case and draw whatever you want to represent null.

Sarika · Post by **Sarika** » Wed Jun 01, 2005 6:44 am

Thanx David that's nice idea.
But in my code there is separate class for error messages.
and i want to print those error messages.
It will be complicated in that case.
So i have found other solution.

I extended LabelGenerator class and shown null message where
null values found.

but labelposition class is not setting the given label positions
if i try to add label positions it is not working i.e null message is not shown.

what i have to do in that case