about limit the input characters in string with xcontrol

[dragondriver]

Hi there,

  I follow one example online to deveope a xcontrol for string input but limiting the input characters only to uppercase A to Z. I have the main code shown as follow

In the Key down event, I discard all input character with ascii code beyond [65, 90]. This seems to works but if I keep pressing down a forbidden key (e.g. %), it will show that key in the control. So how can I ban the input by long press on one key? Thanks.

[Prickly_Pear · Accepted solution]

Maybe you should try including a "key repeat?" event. This will handle the cases when a character is added when the user holds down the key. I believe that you will just need to copy all the code from the "key down?" event.

Jeremy P. 

[Prickly_Pear]

Or perhaps I should have suggested that you just add the "Key Repeat?" event to be handled by that case. You can have more than more event handled per case.

Jeremy P.

[dragondriver]

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@Prickly_Pear wrote:

Or perhaps I should have suggested that you just add the "Key Repeat?" event to be handled by that case. You can have more than more event handled per case.

Jeremy P.

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Thanks. I didn't see there is Key Repeat before. I think that's what I am looking for. I will try that later.

[GerdW]

Hi dragondriver,

and while you're editing your VI you should use an InRangeAndCoerce function to replace two comparisons and a boolean function!

You might even think about using "LexicalClass", but that requires additional comparisons too...

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