[expo bug]: window loses focus in a certain condition

[vdegenne]

Describe the bug

The condition is very specific, when using <BTN_MIDDLE> (mouse) as the toggle event for zoom in/out of the expo and when one viewport that has no windows left had the focus. I made a video to demonstrate as it may be confusing:

https://github.com/user-attachments/assets/9a00b104-580c-4787-9123-417367aa66e9

• middle: create new window
• go top (window is focus green border)
• go middle, and destroy the only window
• go top (window is not focus anymore)
• click to regain focus...
• go middle do nothing
• go top (window lost focus again)

To Reproduce Steps to reproduce the behavior:

1. use middle mouse button for the expo toggle
2. create a window on a viewport A (focus automatically)
3. go in another viewport B and create another window
4. go to viewport A the window should still be focus
5. go to viewport B the window should still be focus
6. destroy viewport B's window
7. go back to viewport A, the window lost focus

Wayfire version 0.9.0-unknown (Oct 7 2024) branch unknown

[vdegenne]

Ok nevermind, in core options there is this setting:

I just needed to remove "BTN_MIDDLE" ther