Home » Eclipse Projects » Eclipse Platform » [Databinding] Converted values not seen in Text
| [Databinding] Converted values not seen in Text [message #329295] |
Wed, 18 June 2008 10:32  |
Eclipse User |
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Hi,
I am using Eclipse 3.4RC3.
I have a Text field, which is connected to a String property via data
binding like this:
--
IObservable observable = ... ; // bound to my String property
Text name=new Text(parent, SWT.NONE);
UpdateValueStrategy targetToModelStrategy=new UpdateValueStrategy();
targetToModelStrategy.setConverter(new TrimWhiteSpaceConverter());
IObservableValue textObserveWidget=SWTObservables.observeText(name,
SWT.FocusOut);
dataBindingContext.bindValue(textObserveWidget, observable,
targetToModelStrategy, null);
--
This should trim whitespace (leading and trailing) from the value
entered into the Text field.
Now, this works fine for updating the model, when I enter " Test " into
the Text field, the model gets updated with "Test" (note: whitespace
removed).
What does not work: the value in the Text field stays " Test ".
There must be a simple way to make the Text field also be updated with
the value after conversion. Can anyone point me in the right direction?
Thanks,
Christoph Jäger
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| Re: [Databinding] Converted values not seen in Text [message #329298 is a reply to message #329295] |
Wed, 18 June 2008 10:59  |
| Eclipse User |
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You'll need to call do this manually after your model is updated by calling:
Binding#updateModelToTarget()
Tom
Christoph Jaeger schrieb:
> Hi,
>
> I am using Eclipse 3.4RC3.
>
> I have a Text field, which is connected to a String property via data
> binding like this:
>
> --
> IObservable observable = ... ; // bound to my String property
> Text name=new Text(parent, SWT.NONE);
>
> UpdateValueStrategy targetToModelStrategy=new UpdateValueStrategy();
> targetToModelStrategy.setConverter(new TrimWhiteSpaceConverter());
>
> IObservableValue textObserveWidget=SWTObservables.observeText(name,
> SWT.FocusOut);
>
> dataBindingContext.bindValue(textObserveWidget, observable,
> targetToModelStrategy, null);
> --
>
> This should trim whitespace (leading and trailing) from the value
> entered into the Text field.
>
> Now, this works fine for updating the model, when I enter " Test " into
> the Text field, the model gets updated with "Test" (note: whitespace
> removed).
>
> What does not work: the value in the Text field stays " Test ".
>
> There must be a simple way to make the Text field also be updated with
> the value after conversion. Can anyone point me in the right direction?
>
> Thanks,
>
> Christoph Jäger
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
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| Re: [Databinding] Converted values not seen in Text [message #329438 is a reply to message #329406] |
Tue, 24 June 2008 06:03 |
| Eclipse User |
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Filed an enhancement request 238222
https://bugs.eclipse.org/bugs/show_bug.cgi?id=238222
Christoph
Eric Rizzo wrote:
> Boris Bokowski wrote:
>> Could you please file an enhancement request in Bugzilla? This seems
>> to be a common feature request that we should support. We could also
>> use the Bugzilla to discuss possible workarounds.
>
> Please post the Bugzilla number or link here so other interested readers
> can follow the progress.
>
> Eric
>
>
>> "Christoph Jaeger" <christoph.jaeger@cargodata.at> wrote in message
>> news:g3b9dr$pm7$1@build.eclipse.org...
>>> Tom Schindl wrote:
>>>> You'll need to call do this manually after your model is updated by
>>>> calling:
>>>>
>>>> Binding#updateModelToTarget()
>>>>
>>> Thanks for your hint. So I extended UpdateValueStrategy to override
>>>
>>> @Override
>>> protected IStatus doSet(IObservableValue observableValue, Object value)
>>> {
>>> IStatus status=super.doSet(observableValue, value);
>>> if (binding!=null) binding.updateModelToTarget();
>>> return status;
>>> }
>>>
>>> and make sure I set the binding (see last line):
>>>
>>> --
>>> UpdateValueStrategyWithFeedback targetToModelStrategy=new
>>> UpdateValueStrategyWithFeedback();
>>> targetToModelStrategy.setConverter(new TrimWhiteSpaceConverter());
>>>
>>> Binding binding=dataBindingContext.bindValue(textObserveWidget,
>>> observable, targetToModelStrategy, null);
>>>
>>> targetToModelStrategy.setBinding(binding);
>>> --
>>>
>>> Looks a bit strange (first I use the targetModelStrategy to create a
>>> binding, and then I feed the resulting binding to the
>>> targetModelStrategy), but seems to work. Do I need to worry about
>>> disposing the binding instance I pass into targetModelStrategy?
>>>
>>> Or is there an easier way to achieve the same?
>>>
>>> Thanks,
>>>
>>> Christoph
>>
>>
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