Detect if mouse if hovering over UI element to change behavior of mouse wheel input

Questions & Answers
1

Consider the following code existing in the update function of a script attached to camera:

float zoom = Input.GetAxis("Mouse ScrollWheel");
            if (zoom != 0) {
                translation.y -= zoom * zoomSpeed;
            }

Just your basic run of the mill input handling for mouse wheel input; which I use for zooming.

This breaks down though when I start adding UI menus. I have a menu (Panel) with some scrollable content. When I hover over the UI, I want to disable the mouse wheel zoom on the camera.

I tried doing this:

 if (!EventSystem.current.IsPointerOverGameObject()) {
            float zoom = Input.GetAxis("Mouse ScrollWheel");
            if (zoom != 0) {
                translation.y -= zoom * zoomSpeed;
            }
        }

But this disables the mousewheel if I am hovering over ANY gameobject. How can I test to see if I am hovering over a UI related gameobject?

2

I ended up resorting to adding two event triggers (PointerEnter and PointerExit) for each menu I have where I want to disable mouse zoom for the camera. I then added two methods to my camera look script to set a flag which define if we should respect mouse wheel input. The even triggers call these as needed.

It works, but was hoping for something a bit cleaner and centralized to the camera script.