How to trigger property invalidation? (original) (raw)

Werner Lehmann lehmann at media-interactive.de
Fri Nov 2 08:25:15 PDT 2012

Pavel,

unfortunately I cannot listen to changes on myProperty because it is not an observable property: MyBean is a domain bean provided by the server and those beans do not have observable properties. Thanks for the clarification though.

In my case this means that I have to clone the bean everytime when a slider position changes so that I can replace the property value I am actually observing (the MyBean property). Seems to be quick enough but is hardly elegant...

Werner

On 02.11.2012 15:50, Pavel Safrata wrote:

Hi Werner, I think that you cannot trigger invalidation manually by design. The property holds a reference and should not be concerned with changes of anything else than the reference. There would be various issues with it, for example there are change notifications bound to the invalidation, which would produce a weird notification of the property being changed to the same value. I think the right approach is to listen directly on the myProperty instead of tweaking the invalidation mechanism.

With Regards, Pavel On 2.11.2012 12:55, Werner Lehmann wrote: Hi,

for an ObjectProperty, is it possible to trigger invalidation manually when MyBean.myProperty changes? Basically I'd like to call markInvalid() but it is private. And set() compares old and new value by reference before invalidating, so won't see the change either. Workaround seems to be to copy the bean to another instance and assign the new instance to the object property. Rgds Werner

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