How to detect user holding enter key down

[Klaus]

Klaus.

The OP wrote:

Code: Select all

Is there a SIMPLE way that key holding could be detected in a way that a script could be activated to abandon the current task?

Didn't the OP want to be able to stop (or divert?) execution of a running handler by hitting the enter key?

Your gadget initializes the local variable, but that only stops execution of the handler after the "clean-up" lines are processed, not the handler itself the moment the enter key is pressed.

CAsba, please be precise. What do you want to do?

Craig

Oops, looks like I completely misunderstood the problem, sorry...

[richmond62]

-
Script of button RUN:

Code: Select all

 
on mouseUp
   put empty into fld "VALZ"
   put 1 into KOUNT
   put 0 into A
   put 1 into B
   repeat until KOUNT > 1000
      put A + B into C
      put B into A
      put C into B
      put KOUNT & " : " & A into line KOUNT of fld "VALZ"
      wait for 25 ticks with messages
      add 1 to KOUNT
   end repeat
end mouseUp

on enterKey
   exit to top
end enterKey

[dunbarx]

Richmond.

I thought this was really a good one. The key of course is the "with messages", allowing LC to peek at the world it lives in and see if any enter keys are down. The only drawback, and it is a tiny one, is that the enter key has to be pressed during the wait time. Hardly an issue.

But there is something I do not understand, assuming anything I said above is valid. This handler does not respond to an enter key at all:

Code: Select all

on mouseUp
   repeat 1000
      repeat with y = 1 to 10
         put y into fld 1
         wait 5 -- cycle quickly through some integers
      end repeat
      wait 60 with messages --wait for the "10", ostensibly plenty of time to hit the enter key
   end repeat
end mouseUp 

on enterKey 
   exit to top
end enterKey

Craig

[Cairoo]

Guys.

I think we've misunderstood what the OP wants. He seems to want to know how to handle the enter key only once while the enter key is down, i.e. do something when the enter key is pressed, but only once, until the enter key is released.

Gerrie

[FourthWorld]

I think we've misunderstood what the OP wants.

Quite possibly. I've requested clarification on the use case, and look forward to the OP's return so we're no longer guessing.

[dunbarx]

CAsba, please be precise. What do you want to do?

Me too.

Craig

[CAsba]

Hi guys,
Yes, I should have been more precise. I was concerned that user may hold enter key down, in reply to an ask dialog without entering a reply. I found that the following code ensures that it won'tb happen. Sorry to have used up your valuable time (I know - AGAIN).

Code: Select all

   put empty into cost
   repeat until cost is a number      
      ask "Enter the minimum purchaseable quantity of packs (numerals only)" titled field "fieldboxtitle"  of cd "template1"
      put it into cost       
      put cost into fld "fmin.purchqty"  
     if cost is not a number or cost <0 or cost is empty then
         put empty into cost
         answer "Try again. You must enter a numeral above zero."titled field "fieldboxtitle"  of cd "template1"  
      end if      
   end repeat 

[FourthWorld]

Hi guys,
Yes, I should have been more precise. I was concerned that user may hold enter key down, in reply to an ask dialog without entering a reply. I found that the following code ensures that it won'tb happen. Sorry to have used up your valuable time (I know - AGAIN).

No worries, I'm just glad you have a good solution. Bother us anytime.

[dunbarx]

Casba

So the whole thing was about data entry and validation, and nothing to do with holding down the enter key.

OK. Hard to communicate clearly.

At least we had a lively discussion about pressing control-type keys.

Craig