wbph
asked on
"program not responding" while using FOR...NEXT
Hey everybody!
I´m writing a program that controls a machine using serial communication. I have to send coördinates taken from a excel document true the serial port. This all works fine but i have to insert a STOP button. My problem is powerbuilder can´t detect wether i´m pressing the button or not.
i think this is because i am using an FOR..NEXT statement.
let me explain:
the program can be busy in the FOR..NEXT statement for about an hour...while the machine isn´t ready it keeps sending coördinates. during that time the program is only looping in ONE statement. in my statement i have used the script
if cb_stop.enabled = false
goto stop
end if
but i can´t press the stop button because powerbuilder is too busy looping the FOR..NEXT statement..
is there any solution for this problem??
Thanks in advance
willem hagen
ps. I hope i´ve made my problem clear but it´s very hard to describe for me in english...
I´m writing a program that controls a machine using serial communication. I have to send coördinates taken from a excel document true the serial port. This all works fine but i have to insert a STOP button. My problem is powerbuilder can´t detect wether i´m pressing the button or not.
i think this is because i am using an FOR..NEXT statement.
let me explain:
the program can be busy in the FOR..NEXT statement for about an hour...while the machine isn´t ready it keeps sending coördinates. during that time the program is only looping in ONE statement. in my statement i have used the script
if cb_stop.enabled = false
goto stop
end if
but i can´t press the stop button because powerbuilder is too busy looping the FOR..NEXT statement..
is there any solution for this problem??
Thanks in advance
willem hagen
ps. I hope i´ve made my problem clear but it´s very hard to describe for me in english...
Did you try using the yield() function in your loop?
ASKER
i have read about the yield function in the powerbuilder help...
but how do i have to use it...
I have the start and stop button in de same window(the start button is the one with the for..next statement)
thanks,
wbph
but how do i have to use it...
I have the start and stop button in de same window(the start button is the one with the for..next statement)
thanks,
wbph
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ASKER
thanks for your answer!
i didnt know the yield function but it works great!
thanks!
willem
i didnt know the yield function but it works great!
thanks!
willem
i am working also on a solution where one application uses thread and where when is needed, any object has his only process time.
So imagine that you have an thread (process) for sending cordinates and one thread where you can all times stop the script.
Refer you on this question for maybe mor explanation
https://www.experts-exchange.com/questions/20544808/Shared-Object-and-Threads.html
I see for the moment only this way to use threads for you.