Re: [Haskell-cafe] Exiting GLUT application

Unfortunately whilst the new code is returning me to a 'Main >' prompt as required another problem has come up. The issue here is found when the code is executed in both GHCi (6.6) and hugs (20050308). Once the code below is loaded evaluating main opens an unfilled window as required. However if this window is closed and main is evaluated again both GHCi and hugs die thus: GHCi: Illegal instruction (core dumped) hugs: Unexpected signal Any thoughts? On 31/07/07, Dave Tapley wrote:

Excellent, thank you Marc your advice worked perfectly.

For reference the corrected code reads:

...

import Graphics.UI.GLUT main = do getArgsAndInitialize createWindow "" actionOnWindowClose $= ContinueExectuion mainLoop

Dave,

On 31/07/07, Marc A. Ziegert wrote:

...

in old glut, the main loop was the core of the single threaded program. exiting it did mean to exit the program completely. in freeglut, you have alternatives. but for compatibility, it defaults to the old behaviour.

http://haskell.org/ghc/docs/latest/html/libraries/GLUT/Graphics-UI-GLUT-Begi...

- marc

Am Dienstag, 31. Juli 2007 19:16 schrieb Dave Tapley:

...

Hi everyone, I have the following skeleton GLUT code:

...

import Graphics.UI.GLUT main = do getArgsAndInitialize createWindow "" mainLoop

It loads into both hugs and ghci fine and when 'main' is evaluated an empty window opens as expected. However when closing the window (clicking the window manager's x button) both hugs and ghci exit with the window, as opposed to returning to the the 'Main>' prompt.

I suspect I need some callback to exit the GUI cleanly?

Cheers, Dave _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe