Grab keyboard when the game is not launched with -nomousegrab

[Lgt2x]

Pull Request Type

• GitHub Workflow changes
• Documentation or Wiki changes
• Build and Dependency changes
• Runtime changes
  • Render changes
  • Audio changes
  • Input changes
  • Network changes
  • Other changes

Description

Avoid system shortcuts getting in the way of the game by grabbing the keyboard. Per the doc, only alt+tab is allowed when the game is in full-screen (https://wiki.libsdl.org/SDL3/SDL_SetWindowKeyboardGrab)

Related Issues

#664

Will change signature when ported to SDL3 (cf #663 )

[pzychotic]

This also works on Windows to prevent tabbing out of the game when accidentally hitting the windows key.

I'm just reluctant to merge since the referenced issue to be closed derailed into another topic.

[Lgt2x]

I edited the description so it will not close the issue automatically. In the meantime, I think we can merge this. I wanted to add the release of the mouse grab when the game is paused in this PR, but unfortunately we'll need to fix the mouse input code first ( see #634)