LabVIEW
Clear a string control when Enter is pressed
Solved!
@Brandon.Baxter wrote:
Hello Bill, I like the "Key Down?" event because you can discard the character an append whatever you want as an end, like a sync word for example
That's a nice way to handle it, given the "revised" requirements. 😉
I think we are dealing with a race condition and I would call it a bug. Note that things work fine if we are in execution highlighting mode or if we slightly delay the write to the local variable e.g. as follows:
(input is set to update while typing)
It also seems to work properly if we use a value property node instead of the local variable to clear the string.
I didn't understand the problem either until I started messing with it.
Using a reference updates the control. I do have Update Value While Typing turned on.
Here is a comparison of two seemingly functionally identical code version (one with a local, one with a value property).
Clearly some gears don't mesh correctly when using a local variable. This should work!
Yes, I know this isn't exactly what the Original Poster asked, but (a) this is much simpler, (b) this is trivial to understand, (c) this functionally does the same thing (though you could probably define an "edge" case where this wouldn't work), and (d) this also works if, instead of typing <CR>, you click outside the box to indicate you are done. This (therefore) makes it much more intuitive for the User. You do need to make the String Control a "Limit to Single Line" control, of course ...
Bob Schor
This is what I settled with. I would have liked to be able to do it without setting "Update Value While Typing". But other than that I'm very happy with the way the UI flows and the way this fits into my code.
