Could anyone teach me how to use QWT to have a specific draw?

[Kuo P. <pi...@gm...>]

Hi, All:
   I would like to have a line-chart with special requirement like what
listed below.

   1. for some data, I would like to show different color for them
   2. for some data, I would like to brush the area between its y-value and
baseline
   3. for a line-chart, I would like to have bar below the line

   Are these requirement possible to achieve by QWT?

   Thanks for your help.

   BR,
   Pico

-- 
Pico Kuo,
Engineer
Taiwan