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Combo-Binding for User-Entries [message #816906]

Fri, 09 March 2012 12:10

Markus Jo

Messages: 83
Registered: January 2012

Member

Hi,
I have an editable ComboBox on my screen. Input is a String array und its bound to a String Property in my data model.

The bindings looks like this:

        IViewerObservableValue orderNumberViewerObsevable = ViewersObservables.observeSingleSelection(this.orderNumberComboViewer);
        IObservableValue orderNumberModelObsevable = EMFEditProperties.value(editingDomain, TimetablePackage.Literals.PROTOCOL_SHEET_ENTRY__ORDER_NUMBER).observeDetail(masterTreeViewerObservable);
        bindingContext.bindValue(orderNumberViewerObsevable, orderNumberModelObsevable);

The binding works if I select a choice from the input list. BUT if I enter a custom String into the combos textfield nothing is written to the model.
And in turn, if I enter something to the model property that is not in the combos input list it wont be displayed in the UI.

Anyone knows how to do this ?

Regards

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Re: Combo-Binding for User-Entries [message #816910 is a reply to message #816906]

Fri, 09 March 2012 12:16

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Well if you enter a choice that is not part of the drop down the
selection is NULL.

I think that you should not bind to the selection but the text-value of
tje Combo (conversion from/to a number will happen by default).

So you code changes to:

IObservableValue orderNumberViewerObsevable =
WidgetProperties.text(this.orderNumberComboViewer.getControl())

Tom

Am 09.03.12 13:10, schrieb Markus Jo:
> Hi,
> I have an editable ComboBox on my screen. Input is a String array und
> its bound to a String Property in my data model.
>
> The bindings looks like this:
>
>
>
> IViewerObservableValue orderNumberViewerObsevable =
> ViewersObservables.observeSingleSelection(this.orderNumberComboViewer);
> IObservableValue orderNumberModelObsevable =
> EMFEditProperties.value(editingDomain,
> TimetablePackage.Literals.PROTOCOL_SHEET_ENTRY__ORDER_NUMBER).observeDetail(masterTreeViewerObservable);
>
> bindingContext.bindValue(orderNumberViewerObsevable,
> orderNumberModelObsevable);
>
>
> The binding works if I select a choice from the input list. BUT if I
> enter a custom String into the combos textfield nothing is written to
> the model.
> And in turn, if I enter something to the model property that is not in
> the combos input list it wont be displayed in the UI.
>
> Anyone knows how to do this ?
>
> Regards

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Re: Combo-Binding for User-Entries [message #816926 is a reply to message #816910]

Fri, 09 March 2012 12:32

Markus Jo

Messages: 83
Registered: January 2012

Member

Hi Tom,
I already tried this....then I get a

java.lang.IllegalArgumentException: Widget [org.eclipse.swt.widgets.Combo] is not supported.
	at org.eclipse.jface.internal.databinding.swt.WidgetDelegatingValueProperty.notSupported(WidgetDelegatingValueProperty.java:23)
	at org.eclipse.jface.internal.databinding.swt.WidgetTextWithEventsProperty.doGetDelegate(WidgetTextWithEventsProperty.java:61)
	at org.eclipse.core.databinding.property.value.DelegatingValueProperty.getDelegate(DelegatingValueProperty.java:54)

....because the Control is a Combo and not the TextField of the combo. Any other ideas ?

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Re: Combo-Binding for User-Entries [message #816953 is a reply to message #816926]

Fri, 09 March 2012 13:05

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Are you really sure you use the correct WidgetProperties-method you
should use the one WITHOUT any parameters.

IObservableValue orderNumberViewerObsevable =
WidgetProperties.text().observe(this.orderNumberComboViewer.getControl());

Tom

Am 09.03.12 13:32, schrieb Markus Jo:
> Hi Tom,
> I already tried this....then I get a
>
>
> java.lang.IllegalArgumentException: Widget
> [org.eclipse.swt.widgets.Combo] is not supported.
> at
> org.eclipse.jface.internal.databinding.swt.WidgetDelegatingValueProperty.notSupported(WidgetDelegatingValueProperty.java:23)
>
> at
> org.eclipse.jface.internal.databinding.swt.WidgetTextWithEventsProperty.doGetDelegate(WidgetTextWithEventsProperty.java:61)
>
> at
> org.eclipse.core.databinding.property.value.DelegatingValueProperty.getDelegate(DelegatingValueProperty.java:54)
>
>
>
>
> ...because the Control is a Combo and not the TextField of the combo.
> Any other ideas ?

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