On KEY down the key navigation toggles a control continuously. I need a way around this.

[wilvil2000]

I need to be able to press down on the F1 function key and have it "switch when released" only. I have to provide two capabilities; use the function keys or the mouse to toggle a boolean. I used key navigation but using key navigation toggles a boolean on a continuous  basis if the user keeps the key depressed. This is not the behaviour I am looking for and it seems I can't control this functionality in the key navigation setup screen. Therefore, I need your help.  Any ideas?
Check the attached vi. It's shows an example of the key navigation behaviour. Run it and press down and hold the F1 key.

Thanks,

Wil

[wilvil2000]

I forgot to mention that I am using LV 8.0
For those of you with other versions here is a picture of the diagram.

[Bob_Y.]

What you are getting with the keyboard is a series of new key-presses.  If you press and hold a letter key like "a", you get lots of letter "a"s.  The same thing is happening here.  So, it is not read as a holding the key down. 

Maybe you will have to use something from the Connectivity -> Input Device Control palette.  I have not use them, however so I won't be much help.

Hope that this helps,
Bob Young

[Dennis_Knutson]

Assuming that you have more than the base version of LabVIEW, you can use the event structure. Use the This VI>Key Up and read the scan code. F1 is also the Help key so you might want to try it with another F key. The event structure should also be used with a Value Change event on the Boolean control.

[wilvil2000]

Bob

The Connectivity -->  Input Device Control Pallete has tools that might help me with my problem. I tested it and I find only one problem so far and that is that pressing F1 calls and opens the LabVIEW Help program. This is normally disable with key navigation because I have selected to "override system default function key settings" in the Tools-->Options-->Front Panel.

Does anybody know how to disable this short cut for LabVIEW Help?

Thanks,

Wil

[wilvil2000]

I am going to post this F1 issue separate under the title "How to disable Function Key".

If I can disable the function keys then I will have a workaround for my initial problem with the key navigation.

Thank you for your help, all that replied.


Wil