DatePicker - access to text field content

[nittka]

I was not able to find java-api to access the content of the text field for the date picker.
We are migrating from Vaadin 7/8 to Vaadin 14 and have existing code that depends on having access to the actual text field, not only the date value (raising additional errors, automatically correcting format errors...).
The simplest example illustrating the problem is entering dates without the century: 1.3.20 instead of 1.3.2020
The current implementation does not even mark this as an error and I did not find a way to get notified that some text was entered. Due to the illegal format, the value remains null and no value change event is fired. Becaue there is no error, the user expects e.g. a date filter to be applied, but to the server it looks like there is no date defined!

[vlukashov]

Thanks for providing extra context!

I'll close this issue as a duplicate of #1158 so that we'll have only one open GitHub issue for this idea.

[rolfsmeds]

As it might be of interest, we are currently planning support for customizable multiple parsing formats: #911