Variable length Text Box Mask

[IbraheemOsama]

it was requested multiple times to have a variable length textbox mask to allow the following examples:

1. Minutes : 01, 0 ,1, 59 (the mask should allow a single character or two)
2. decimals : 1111.1111 or 1.1
   etc :)

the original request was #737 and #746

[ZingPow]

For me the problem the user will run into is when they click on the maskedTextBox the cursor shows up on the right side of the mask, so they will naturally go backspace to enter into the 'mask' and enter their single digit, which if they have a multiply digit mask will not be recorded. Also trying to explain that
_1 and 1_ are different and only one works, isn't really putting the user first and I'm going to hear it from users. I realize that code wise its a bit of a bugger, but user wise, it makes sense.

I have tried this before
https://www.codeproject.com/articles/1156810/numeric-textbox-for-universal-windows-app-uwp
and it seemed to work in case it gives you some ideas.

[IbraheemOsama]

@ZingPow it was designed for the user to click on any character on the textbox and the cursor will show at the selected character, the mask isn't by default setting the cursor to the right, you just clicking at the end of the box but I've a better solution if the textbox is empty and it got focus the cusror should start at the beginning else do same behavior. (Will create a bug for this)
Actually I'm in favor of a variable length masked textbox rather than a numeric textbox because it is more general :) but the community should decide with fits more

[IbraheemOsama]

@deltakosh @hermitdave @skendrot @ScottIsAFool
how do you imagine this control ? I mean should it be similar to textbox mask when setting the mask what should indicate for a max length variable etc

[skendrot]

This sounds like a problem for a RegEx attached property

[IbraheemOsama]

I guess we can add RegEx attached property with another property called isValid and we validate on focus this property and set the IsValid attached property of the textbox so the user can validate on submit !!
What do you think ? of course this is not a mask we can say it's a regex validation not a mask

[deltakosh]

I like the idea of having a second attached property that works with a regex instead of a mask.