Frequently when using traitsui, i have a
depends_on relationships that are somewhat costly, and i would to Not update the trait with every character entry of a text-box.
For example, if i have a Int which is used in a calculation, through depends_on linkage, the linkage is actuated every time i add a digit to Int.
currently i circumvent this by using buttons, but am curious if there is there a way to defer updating everything until the user hits
enter or changes focus of the UI.