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
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