On Sun, 24 May 2009 10:33:13 +0200, Rolf Haynberg <rolf.haynb...@student.kit.edu> wrote:
> Hello wxhaskell users, > > I'm new to wxhaskell and I can't solve the following problem on my own > (tried to find a solution online for hours). > > What I'm trying to do is simple: I want to display the time from now > until a time in the future. For which I read the current time with > getClockTime, do some calculations and then paint the time. The > following compiles but quits immediately when I run the app (no error). > > ... > demo :: IO () > demo = do f <- frameFixed [text := "Countdown"] > currenttime <- getClockTime > p <- panel f [on paint := (writeTimeDiff > currenttime) ] > set f [layout := fill $ container p $ margin 10 $ column 5 > []] > > writeTimeDiff :: ClockTime -> DC a -> Rect -> IO () > writeTimeDiff currenttime dc _ = drawText dc (getTimeDiff currenttime) > (Point 2 2) [] > > getTimeDiff :: ClockTime -> String > getTimeDiff = calendarTimeToString . toUTCTime . timeDiffToClockTime . > (diffClockTimes eta) > where eta = toClockTime (CalendarTime 2010 January 1 16 > 45 0 0 > Thursday 0 "CEST" 0 False) > ... > > Don't worry about how I calculate the time difference. Imho the > problem has something to do with > currenttime <- getClockTime > > I hope anyone sees a problem in the code. I have the feeling that I'm > missing something fundamental here. > > Thanks in advance, > Rolf > Use the GHCi debugger [1] to see where the crash occurs. [1] http://www.haskell.org/ghc/docs/latest/html/users_guide/ghci-debugger.html -- Regards, Henk-Jan van Tuyl -- http://functor.bamikanarie.com http://Van.Tuyl.eu/ -- ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com _______________________________________________ wxhaskell-users mailing list wxhaskell-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wxhaskell-users
