Hi!
I am new to haskell and I would like to do a seemingly very simple task in
it(using wxhaskell).
I would like to change properties based on data acquired from the outside
world(i.e real time, typed text etc.). Probably it sounds stupid but I simpy
cannot do this for days. I am very confused and it is annoying how a simple
task as this is so difficult.
Here are what I tried to do:
Given a text label and a button, Evry time I press the button I'd like to read
a system dependent time data(for example getCPUTtime) and write it back on the
label.
Given a text label and a timer. Evry time the timer condition fires i'd like to
read a system dependent time data...(like above) and write it back
I couldn't do any of these. Mostly because if acquire any data it comes in the
form of IO <sometype> and set doesn't accept IO type. So I cannot set the new
value.
I coouldn't find any function in the wxhaskell documentation or tutorials that
sets anything based on IO types.
I also found a function unsafePerformIO which could convert an IO to a non IO
type but I couldn't do it anyway. I almost did the second task but the label
didn't refresh by itself. It only refreshed itself when I moved the window
along or continually resized it.
Can anybody help me? Ther must be some way to do these things. They cannot be
impossible because they are very basic tasks.
------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now. http://p.sf.net/sfu/bobj-july
_______________________________________________
wxhaskell-users mailing list
wxhaskell-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wxhaskell-users
