Zooming with ctrl + MouseWheel does not work as expected on a Mac

[quadruple-output]

Describe the bug

Holding CTRL while turning the mouse wheel is translated to a Zoom event. This is correct on Windows, but on a Mac the correct modifier key would be Command rather than CTRL.

(On a Mac, the combination CTRL+Wheel is captured by the OS and triggers a full-screen zoom.)

To Reproduce
Steps to reproduce the behavior:

1. On a Mac: cargo run -p egui_demo_app
2. Open the "Plot" demo
3. try zooming with Command+MouseWheel (only moves but does not zoom) or CTRL+MouseWheel (triggers hardware full-screen zoom which is not desired)

[emilk]

Ctrl+wheel is not captured by MacOS for me. I'm on macOS Mojave 10.14.6. Maybe it's something I disabled way back, I can't remember.

I picked ctrl-scroll because that's how I zoom in Firefox, but I notice cmd-scroll also works. Perhaps egui_glium should treat both as a zoom event?

[quadruple-output]

Oh, ok… I am glad you tested this on your machine.

Keybindings on the Mac often surprise me. I think I found the setting that makes the difference for me: System Preferences → Accessibility → Zoom → [/] Use scroll gesture with modifier keys to zoom (can be configured as "Control", "Option", or "Command")