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[Databinding] Example for binding enabled state of control to validationStatus of DataBindingContext [message #312994]

Tue, 27 February 2007 10:18

Eclipse User

Hi,

is there any example, how to bind the enabled state of a Control to the
validation state of a Databinding(Context). AFAIR I have seen such a example
somewhere but I can't find it anymore.

Typical usecase:
Save button should only be enabled, if no validation errors have occoured!

Re: [Databinding] Example for binding enabled state of control to validationStatus of DataBindingCon [message #313005 is a reply to message #312994]

Tue, 27 February 2007 11:30

Eclipse User

How to bind to the validation status is answered in the FAQ[1]. It isn't
your exact use case but it's close.

-brad

[1]
http://wiki.eclipse.org/index.php/JFace_Data_Binding_FAQ#How _do_I_bind_to_the_ValidationError_of_a_Binding_or_DataBindin gContext.3F

Re: [Databinding] Example for binding enabled state of control to validationStatus of DataBindingCon [message #313140 is a reply to message #312994]

Sat, 03 March 2007 00:17

Eclipse User

https://bugs.eclipse.org/bugs/show_bug.cgi?id=175901
contains code that does something very similar for a wizard page.

Another way of doing it, if you don't mind using non-API (ControlUpdater),
you can write:
IObservableValue mergedStatus =
new AggregateValidationStatus(dbc.getBindings,
AggregateValidationStatus.MAX_SEVERITY);
new ControlUpdater(button) {
public void updateControl() {
button.setEnabled(((IStatus)mergedStatus.getValue()).isOk()) ;
}
}

That should do the trick.

"Wolfgang Herr" <herr@tambas.at> schrieb im Newsbeitrag
news:es1i3c$tns$1@utils.eclipse.org...
> Hi,
>
> is there any example, how to bind the enabled state of a Control to the
> validation state of a Databinding(Context). AFAIR I have seen such a
> example somewhere but I can't find it anymore.
>
> Typical usecase:
> Save button should only be enabled, if no validation errors have occoured!
>

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