Can't hide label with dynamic data

I have a widget with inside two differents labels I want to show only if I click on a button.
One button show widget and hide label 1 and show label 2
Other button show widget and show label 1 and hide label 2

I use it for 2 things, one is only static image on background label and it is ok. The other show delta behind or in front and in this case, the label is hide until the value inside change, and then it is showing automaticly. (with the hide click on button).

Sorry, what is the question?

If a Widget is Show, and I hide one of his label with a clic button action, the label is hide only the time the data inside cahnge, then it appears again !
SO my question is, how could I hide this label ?