Catching window expose event

When I move another windowA over windowB, things I draw on
WindowB will get erased.  How can I catch the "expose" event
on Window B so that I can redraw WindowB ?  Does it tell me
which part of WindowB are being exposed so I only redraw
that part ?
horiAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

russgoldCommented:
Unfortunately not.  It simply calls your paint() method whenever it wants to refresh any part of the component - and doesn't pass the visible area.  If you have a lot of computations, move them out of your paint method.  If you are using a lot of graphics overlaying each other, use an offscreen bitmap to minimize the redraw overhead.  Currently, that is the best you can do in Java.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Java

From novice to tech pro — start learning today.