SDL3: SDL_MouseMotionEvent and SDL_MouseButtonEvent not reporting a valid SDL_MouseId.

[Oliver-makes-code]

I'm setting up an input handler for my game engine, and I'm setting it up to support different devices (for local multiplayer), and the events SDL_MouseButtonEvent and SDL_MouseMotionEvent are returning 0 for .which. SDL_MouseWheelEvent is unaffected.

Here's the debug log output from my engine:

main: [DEBUG] SDL event: 1024
main: [WARN] Failed to find Rendering::Input::Mouse device with index 0
main: [DEBUG] SDL event: 1025
main: [WARN] Failed to find Rendering::Input::Mouse device with index 0
main: [DEBUG] SDL event: 1026
main: [WARN] Failed to find Rendering::Input::Mouse device with index 0

I made sure I was on the latest commit from the main branch before reporting.

[AntTheAlchemist]

I'm getting the same. It's been this way for as long as I remember. I just assumed the ID wasn't available. I'd be interested in this working.

[AntTheAlchemist]

Oddly, I get a correct ID when in relative mode.

[slouken]

I'm not sure where best to document it, but the mouse ID is only available in relative mode on desktop platforms.

[Oliver-makes-code]

I'm not sure where best to document it, but the mouse ID is only available in relative mode on desktop platforms.

Could there be a hint to treat it as an arbitrary ID?
SDL_SetHint(SDL_HINT_GLOBAL_MOUSE_ID, "1");

[slouken]

Or you can just treat mouse ID 0 as your default mouse?