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Best way to make data-binding conditional [message #1802524]

Mon, 11 February 2019 12:15

Linuxhippy Mising name

Messages: 53
Registered: July 2009

Member

It it possible to make data-binding conditional, e.g. only synchronize between model and target in case an IObservableValue<Boolean> is true?

Some background: We are running an application which hides SWT widgets in case the user has no permissions to view the data contained in it. However we observed hiding is not enough - what might work for native platforms breaks for RAP.
At least when using RAP the data is still in the JSON sent from the server to the client, so in case the user has no permissions I would like data binding to assign "" instead of real values to the widgets.

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Re: Best way to make data-binding conditional [message #1802532 is a reply to message #1802524]

Mon, 11 February 2019 15:07

Brian de Alwis

Messages: 876
Registered: January 2012

Senior Member

You can use a ComputedValue as an intermediate value. Or the ISideEffects class might be even better. There are some examples at the snippets page:

https://wiki.eclipse.org/JFace_Data_Binding/Snippets

Eclipse Platform committer. Ask me about Eclipse support, training, and consulting.

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