Eclipse Community Forums: JFace » Validate text in TextCellEditor after input

Home » Eclipse Projects » JFace » Validate text in TextCellEditor after input

Validate text in TextCellEditor after input [message #22419]

Tue, 21 July 2009 12:20

Eclipse User

Hello all,

Here is my problem: I have a table with a celleditor (textcelleditor)
attached to one of its columns. To this textcelleditor I have also attached
an ICellEditorValidator just to validate the user input.
The problem is that the validator is called when the editor is activated
(when the user first clicks the cell) and not after it presses enter to
finish editing. In other words, the data validated is that which already
existed at the start of the editing process and not the new data just
entered.

Any clues to where I am failing?

Thank you!
Andrei.

Re: Validate text in TextCellEditor after input [message #22509 is a reply to message #22419]

Wed, 22 July 2009 08:34

Eclipse User

Originally posted by: bjoern.bjoernfischer.de

Hello Andrei,
maybe you could attach a FocusListener to the TextCellEditor (more
specific: to the Text control you can obtain via
TextCellEditor#getControl()). Then your validation could be executed
when the editor looses its focus.

Regards,
Björn

Andrei Serea schrieb:
> Hello all,
>
> Here is my problem: I have a table with a celleditor (textcelleditor)
> attached to one of its columns. To this textcelleditor I have also attached
> an ICellEditorValidator just to validate the user input.
> The problem is that the validator is called when the editor is activated
> (when the user first clicks the cell) and not after it presses enter to
> finish editing. In other words, the data validated is that which already
> existed at the start of the editing process and not the new data just
> entered.
>
> Any clues to where I am failing?
>
> Thank you!
> Andrei.
>
>

Re: Validate text in TextCellEditor after input [message #22638 is a reply to message #22509]

Wed, 22 July 2009 09:09

Eclipse User

Yes, I thought of this and I will probably use this solution.

My question still remains: Why would anyone want the validator to be
called at the activation (begin of edit) of the cell editor and not at the
deactivation (end of edit)? I just cannot understand the use of this...
Maybe someone could help me understand. Or should I look at this as a bug?

Re: Validate text in TextCellEditor after input [message #22681 is a reply to message #22638]

Wed, 22 July 2009 09:22

Eclipse User

Originally posted by: bjoern.bjoernfischer.de

As far as I can see the cell validator is called on every change in the
cell (and this includes activation). This behaviour might be good if you
want to for example filter for forbidden characters or something like that.

I can not say if this is a bug or not, for me it is just a useless
feature. But since you have full control of the underlying Text widget
it is not difficult to work around (you can e.g. also put the
VerifyListener on the Text widget). Maybe that is also a reason why
nobody puts effort on that topic. An easy workaround makes the "bug"
unimportant.

Regards,
Björn

Andrei Serea schrieb:
> Yes, I thought of this and I will probably use this solution.
>
> My question still remains: Why would anyone want the validator to be
> called at the activation (begin of edit) of the cell editor and not at
> the deactivation (end of edit)? I just cannot understand the use of
> this... Maybe someone could help me understand. Or should I look at this
> as a bug?
>

Previous Topic:	Bind TableViewer to Multiple Objects?
Next Topic:	[CellEditor] Find the currently active CellEditor in a TableViewer (3.3 API)

Goto Forum:

-=] Back to Top [=-

Current Time: Sun Jul 13 11:51:56 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter