Custom Field value should be synchronised not only on change

[jcgueriaud1]

Describe your motivation

When you're using a custom field the value is automatically updated on change.

It might work for certain cases but sometimes it needs to be synchronized on click (on a button) or eagerly.

In that case, the value event might useless or might cause extra communication.

Describe the solution you'd like

First be able to disable this behaviour (then the developer can manage it entirely) or switch the event to a different one. (I don't know if that would work with the event propagation).

Describe alternatives you've considered

No response

Additional context

No response

[yuriy-fix]

Could you please provide use-cases on where you would like to have this behaviour, so we could consider required API?

[jcgueriaud1]

There are some examples here: https://vaadin.com/blog/creating-well-behaving-form-fields-using-customfield

For example:

• if you want to create a field with a Map to select a position on click. on change is not useful.
• a Grid Field with a filter (the filter will fire the change event).
• one textField with EAGER mode will also update the value on change, which seems wrong

If you're using a CustomField with an inner binder, the change event is very likely wrong (you want to update the value based on the Binder value change).