Line trace to drag objects + to display widgets of interactive objects

Hello everyone, I’ve created a dragging BP whitch allows me to drag different physical bodies in the scene.
I want to display widgets (for example “press E to interact”) when my character looking on specific object (for example a small key, so box collision trigger is not a good idea).
I don’t really know how should I do it.
My line trace shots when RMB is pressed, so it works fine with object dragging but if I want to call out a widget when I’m looking on the key (for example), the line trace should be produced each tick and this way it’s not going to work with dragging.
Does anyone have any idea how to do this properly? It would be really helpfull, thank you guys in advance