how to ensure that edittext entries contain no letters but only numbers

[c.pfaffenbichler]

Im trying to set up a dialog that contains an edittext-field to enter an intended width and some radiobuttons that represent various saving-locations for a copy of an image.
But I foresee certain problems so my questions are:
Is there a way to ensure that no letters but only numbers are entered in an edittext-field?
And is there a way to remove Umlauts and other problematic characters from the filename prior to saving the copy?

I know that probably the info is out there somewhere, but Id certainly appreciate any help.

[try67]

Which scripting language are you using?

If it's JS, you can use this:
var patt1 = new RegExp(/\D/);
if (patt1.test(str)) {} // It's not a number
else {} //It is a number

But be advised that this will work with numbers ONLY, so periods, commas, spaces and the like will not be accepted.

[c.pfaffenbichler]

How embarrassing, I forgot to mention Im working with JavaScript.
First of thanks, but ... could one allow for commas after all?

[_xbytor_]

numberKeystrokeFilter = function() {
if (this.text.match(/[^\-\.\d]/)) {
this.text = this.text.replace(/[^\-\.\d]/g, '');
}
};
numericKeystrokeFilter = function() {
if (this.text.match(/[^\d]/)) {
this.text = this.text.replace(/[^\d]/g, '');
}
};


edittext.onChange = numberKeystrokeFilter;
edittext.onChange = numericKeystrokeFilter;


The first thing matches floats and negative floats. Kinda.
The second match simple integers.

Tweak 'em while ya got em.

-X
--
for photoshop scripting solutions of all sorts
contact: xbytor@gmail.com

[c.pfaffenbichler]

Thanks, xbytor!

[MarkWalsh]

Here are 2 of the Regular Expressions I use to validate numeric entry

Strict use of commas (commas are optional, but must be used consistently)
^\-?([0-9]{1,3}(\,[0-9]{3})*|[0-9]*)(\.[0-9]+)?$

Semi-strict use of commas (commas are optional, as long as they are in the correct place)
^\-?[0-9]*(\,?[0-9]{3})*(\.[0-9]+)?$

The first one will allow
10,000,000,000,000,000
10000000000000000

The second one will also allow
10,000000,000,000000

I believe I should have another regex that I use for validation during entry, but I can't seem to locate it right now.

[c.pfaffenbichler]

Thanks!
Thats a lot of ways You offered for doing that!