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Re: timers without widgets [message #43731 is a reply to message #43555]

Fri, 22 April 2005 16:08

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

Benjamin Hornberger wrote:
> Rick Towler wrote:
>
>>
>> I understand that 95% of events are generated by a GUI but it would be
>> nice to have some sort of mechanism to handle the other 5%. Timers
>> and socket I/O come to mind.
>
>
> Socket I/O is exactly our problem. We use a timer to continuously
> (actually frequently rather than continuously) read from a socket to
> implement a listening socket. But there are many problems with that,
> like IDL not reacting while it tries to read (looks like crashed).

Does SOCKET not provide for non-blocking reads? I haven't really used
it... That's too bad. I should add that to my list of feature requests
for SOCKET.

> I guess IDL is just made for data analysis and not instrument control
> which involves interaction with device drivers and the OS on a deeper
> level :-(.

Yeah, I guess so. But that is too bad.

I had a similar project and had to use MATLAB. IDL's SOCKET doesn't
support UDP and even if it did the blocking would have killed me. I
used a free TCP/UDP library for MATLAB which doesn't provide for
callbacks so you have to poll, but it doesn't block and MATLAB's timer
is better.

-Rick

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[Message index]

		timers without widgets By: Benjamin Hornberger on Fri, 22 April 2005 09:11
		Re: timers without widgets By: Benjamin Hornberger on Sat, 23 April 2005 09:49
		Re: timers without widgets By: Benjamin Hornberger on Sat, 23 April 2005 09:39
		Re: timers without widgets By: Craig Markwardt on Sat, 23 April 2005 08:03
		Re: timers without widgets By: Y.T. on Fri, 22 April 2005 19:25
		Re: timers without widgets By: Rick Towler on Fri, 22 April 2005 16:08

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