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Text Widget: How to check (verify) user input? [message #462477]

Wed, 12 October 2005 16:16

Eclipse User

Hi,

i know this is kinda of a basic question. But i wonder how i can best
verify the user input of a text widget, where the user can type in free
text.

In my specific case i only want to allow Integer from 0 on....

How can i do this best?

thanks for any help
Andreas

Re: Text Widget: How to check (verify) user input? [message #462481 is a reply to message #462477]

Wed, 12 October 2005 17:03

Eclipse User

Andreas,

You can use a VerifyListener to listen to changes on the text widget.
From the VerifyEvent you can get the new text that's being entered so
you can figure out if it'd result in an invalid value. If you have an
invalid state, you set the doit field on the VerifyEvent to false, and
the new text won't show up in the text field.

See the SWT Snippets related to the Text widget for examples:
http://www.eclipse.org/swt/snippets/

Hope this helps,
- Jeff

Andreas wrote:
> Hi,
>
> i know this is kinda of a basic question. But i wonder how i can best
> verify the user input of a text widget, where the user can type in free
> text.
>
> In my specific case i only want to allow Integer from 0 on....
>
>
> How can i do this best?
>
> thanks for any help
> Andreas
>

Re: Text Widget: How to check (verify) user input? [message #462507 is a reply to message #462481]

Thu, 13 October 2005 05:18

Eclipse User

Jeff,

thanks a lot for your answer and pointing me towards the snippets.

I used code provided there and it works like a champ now.

Have a nice day
Andreas

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