simulate keystroke

J. Landman Gay jacque at hyperactivesw.com
Sun Oct 26 21:11:27 CDT 2008


J. Landman Gay wrote:
> Larry Watts wrote:
>> hi Mark,
>> What I'm really wondering how to do is this:
>> I have a button script running with a lot of repeat statements in it. 
>> Depending upon the input, the script will run for 5 minutes to an 
>> hour.  I want the user to be able to interrupt the script by clicking 
>> on another button on the card.  But as I understand it, Rev cannot do 
>> that because the first button has the focus until the entire script is 
>> finished running. Is there a way to work around this limitation of Rev?
> 
> Yes, and the workaround is the preferred method. Running a repeat loop 
> that long doesn't just lock up Rev, it locks up the whole CPU. Here's 
> the preferred solution: <http://www.hyperactivesw.com/polling.html>.

It just occured to me that your repeat loop probably doesn't track the 
mouse, so the link I gave isn't a good reference. What I'd use instead 
is a "send in <time>" statement that calls a handler repeatedly until 
the work is done. This will avoid taking all the CPU cycles too, because 
a time slice is given to other processes in between the "send"s.

A simple example:

on mouseUp -- the button that starts the processing
  set the cProcessFlag of me to true
  send "doProcess" to me in 1 millisecond -- can be adjusted
end mouseUp

on doProcess
  if <some quit condition; maybe the data is empty, etc> or \
   the cProcessFlag of me = false then
    set the cProcessFlag of me to false -- in case the quit condition 
got us here
   else
    doSomeProcessing
    send "doProcess" to me in 1 millisecond
  end if
end doProcess

And in the button that interrupts the processing:

on mouseUp
   set the cProcessFlag of btn "start button" to false
end mouseUp

-- 
Jacqueline Landman Gay         |     jacque at hyperactivesw.com
HyperActive Software           |     http://www.hyperactivesw.com



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