Detect mouse clicks with multiple widgets on screen

So, first of all, sorry for my english. My problem is I can’t listen to the mouse click on multiple widgets. For now, i have this:

I create a widget every time I need a new character sheet for my project. Those sheets are movable when I click on them (except when I click on a button on them) and stay pressed; I can drag them where I want on my screen. The problem is when I create a new one, I can’t interact anymore with the previous ones. (for exemple, if the A00339 is the last one that i created i cant move the A00025 anymore). I find the node “Event On Mouse Enter” that allows me to know if the mouse enters on a widget (and it works well), but I’m stuck there. Now, here I want to say that if I enter in a widget (with this node), then this widget must listen the mouse clicks and not the others widgets. Currently, I have tried a lot of things like this, for example:

That put the widget in the foreground, but I still can’t interact with it. So it’s where I am. If you need more information, tell me.

did you update the focus to focus on the clicked widget?