Check ui.text on stop editing

I need to enable/disable some buttons depend on ui.text elements validation. If element is changed and valid then button should be enabled and disabled if result of validation is negative. But if I change only one text field it need to lost focus to be validated.

Is there any possibility to check changes like this: http://webix.com/snippet/371f07b1 but additionally check changes of ui.text elements on stop editing?

You can use the onTimedKeyPress event to validate the form and disable/enable buttons as well:

http://webix.com/snippet/2116c039

Thanks a lot!