Re: [Haskell-cafe] Exiting GLUT application
Are you trying it on Linux? I had exactly the same problem. I believe it's with with X11/OpenGL. I've written C programs using GLUT, freeGLUT and GLFW (another OpenGL Window Kit) to re-open window after first one is closed. Unfortunately all gave the same fault. So it leads me to believe the problem is not really GLUT specific. I've not tried other platforms. So I ended up using a trick that always keeps the first window and reuse it for GHCi session. Just hide it and show it would make no difference to the end user, at least true on both Windows and Linux. Mac now has a problem prevents getting GLUT event when loaded in GHCi. Regards, Paul Liu On 8/1/07, Dave Tapley [EMAIL PROTECTED] wrote: 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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-Begin.html#v%3AExit - 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 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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-Begin.html#v%3AExit - 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 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Exiting GLUT application
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-Begin.html#v%3AExit - 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 pgplzVStD22ul.pgp Description: PGP signature ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
