[Haskell-beginners] Sub-second precision

[Alex Rozenshteyn]

I'm using gtk2hs (although I might try and see how wxHaskell compares when
I've got more working).

As for the repainting, I don't think I was clear enough in my initial post:
 my problem isn't how to change the value every 1/100 of a second but how to
ensure that the value I write doesn't get hugely inaccurate.  I was thinking
that I'd use the system time as the data and just draw when appropriate, but
I hadn't found something that was precise enough.

I ended up finding System.Posix.Clock, which does what I need, but I don't
know if there's something more standard.

On Sun, Jul 25, 2010 at 7:30 PM, Henk-Jan van Tuyl <hjgtuyl at chello.nl>wrote:

> On Sat, 24 Jul 2010 22:09:15 +0200, Alex Rozenshteyn <rpglover64 at gmail.com>
> wrote:
>
>  I'm trying to write a simple timer application (mostly to learn gui
>> programming), and I'd like it to display 1/100ths of a second.  I know I
>> can
>> fake this with threadDelay, but I was wondering if there's a way to get
>> current time to more precision than one second.
>>
>>
> That depends on the type of GUI you are using, of course. If you use
> wxHaskell, you can do it like this:
>
>   t <- timer f [ interval   := 10
>>               , on command := repaint
>>               ]
>>
>
> where f is the frame handle; you don't need to use t anywhere. The interval
> is defined in milliseconds.
>
> Regards,
> Henk-Jan van Tuyl
>
>
> --
> http://Van.Tuyl.eu/
> http://members.chello.nl/hjgtuyl/tourdemonad.html
> --
>



-- 
          Alex R
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