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Zooming with ctrl + MouseWheel does not work as expected on a Mac #401

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quadruple-output opened this issue May 16, 2021 · 2 comments · Fixed by #402
Closed

Zooming with ctrl + MouseWheel does not work as expected on a Mac #401

quadruple-output opened this issue May 16, 2021 · 2 comments · Fixed by #402
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bug Something is broken native-glium Relates to running egui_glium on native

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@quadruple-output
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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)
@quadruple-output quadruple-output added the bug Something is broken label May 16, 2021
@quadruple-output quadruple-output mentioned this issue May 16, 2021
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May 17, 2021 •
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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?

native-glium Relates to running egui_glium on native label May 17, 2021
@quadruple-output
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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")

@follower follower mentioned this issue Feb 13, 2022
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bug Something is broken native-glium Relates to running egui_glium on native
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Fix mac scroll modifier
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@quadruple-output