ChartDirector Display Single Value

Question

I have a question
I use BarLayer Add three Dataset
I can use display all Data

setAggregateLabelStyle  
setAggregateLabelFormat 

but I want display single Data Value Like this

Any Idea?

Answer 1

You can draw the label in dynamic layer. Calculate the red bar position and draw the text on it

Answer 2

I find a way to Solve use addGroupLabel