Question mouse delta but activated with lmb hold?

Hi, as the title says. I want to model pan behavior, and I have setup with keyboard buttons (WSAD and arrow keys) and I want to add mouse pan to it. I can add another 2D composite with mouse delta on it but I don't know how to activate is only when LMB holds. Can I use the same Action for this or I need to make a different one just for a mouse?

 

There's currently no composite equivalent to "Button With One Modifier" that works for other kinds of control types. It's in the works.

ATM this requires adding a custom composite to get the "Button + Vector2" combination.