Forcing swing gui to be drawn

[moulio]

Hey, right now I have a program that analyzes an EKG when a button is
clicked. I want to pop up a progress bar in a new frame to show how far
it is, but I'm having problems. I can create the frame, and it will
appear, but it won't draw the progress bar until it is done executing
all of the other commands.

I ahve tried opening the frame with a separate thread, but it resulted
in the same problem. I guess there must be some draw queue that is on a
low priority, but I really have no idea why it isn't working.

Any help would be great... I show this at a science fair in 2 days.
Thanks!

-Thomas

 

[Ryan]

Hey, right now I have a program that analyzes an EKG when a button is
clicked. I want to pop up a progress bar in a new frame to show how far
it is, but I'm having problems. I can create the frame, and it will
appear, but it won't draw the progress bar until it is done executing
all of the other commands.

I ahve tried opening the frame with a separate thread, but it resulted
in the same problem. I guess there must be some draw queue that is on a
low priority, but I really have no idea why it isn't working.

Any help would be great... I show this at a science fair in 2 days.
Thanks!

-Thomas

Take a look at this site
(http://java.sun.com/docs/books/tutorial/uiswing/components/progress.html),
it is a progress bar tutorial with demos and source code.

 

[Larry Barowski]

Hey, right now I have a program that analyzes an EKG when a button is
clicked. I want to pop up a progress bar in a new frame to show how far
it is, but I'm having problems. I can create the frame, and it will
appear, but it won't draw the progress bar until it is done executing
all of the other commands.

I ahve tried opening the frame with a separate thread, but it resulted
in the same problem. I guess there must be some draw queue that is on a
low priority, but I really have no idea why it isn't working.

You must do your analysis in a separate thread. Be sure
not to do any gui operations outside the EDT - to update
the progress bar from the other thread, use
SwingUtilities.invokeLater().

 

[moulio]

Having a separate thread worked great. Thanks for the help!!!
-Thomas