[question] How to deal with touscreen and USB mouse in the same application (Android)

[MVoloshin]

I tried to build Bochs (https://github.com/bochs-emu/Bochs) for Android with https://github.com/pelya/commandergenius and saw following results:

1. SDL-1.2 build: phone's touchscreen works fine, but unable to move cursor with external USB mouse (right and left button work fine in both cases).
2. SDL2 build: with touchscreen cursor misbehaves (chaotically moves), external USB mouse works fine (right and left button work fine in both cases).
   Note: without relative mode enabled neither touchscreen nor external mouse works.

Device: Redmi 10C, Android 13
Could you tell me what should I do to make both phone's touchscreen and external USB mouse work?

[icculus]

SDL2 will send one-finger touches as mouse events in case that gets phones to work with desktop apps without changes. If Bochs is looking for both touch events and mouse events (and not throwing away the mouse events that have a which field of SDL_TOUCH_MOUSEID), it might be getting confused between the two.

I'd check that first.