modern UI - change widget value only if condition met

Node Development
1

Hi,

I try to implement a widget_1 which will change its value only if another widget_2 is set to a specific value. otherwise I would like to let the value of widget_1 untouched. I tried to use a @ValueProvider (computeFromValueSupplier(...)) for widget_1 using a @ValueReference of widget_2 but I don’t know how to avoid a value change if my condition is not met. I don’t know how to retrieve the current value of widget_1.
I assume it’s possible to get such a behavior and I would be happy if anybody could help me.

Antje

2

Hi @niederle,

if you did not already get it working, I think what you need is to simply throw a StateComputationFailureException in the computeState method if you don’t want to update the value. I don’t know which version you are developing against, since the API is still evolving… That’s it’s name at least in the current nightly.