Mouse Grab not enabled for Android

Description

When Enabling the Hotkey for Mouse Grab on Android (tested on versions 6, 10, and 12), It does not activate and leaves the mouse pointer freely move in the background. This causes problems for most games when the system mouse pointer leaves the bounds of the game and, for example, activates the top Android tray. When this happens, any mouse click takes you out of the game and into the Android pull-down notifications menu.

Attempting to activate Grab Mouse does nothing. Attempting to activate Game Focus Mode (which is supposed to also grab the mouse) will activate the mode, but the mouse is not grabbed.

Expected behavior

Mouse Pointer locks to the game screen allowing for full use of mouse or trackball without activating the OS functions.

Actual behavior

System and game mouse pointers remain separate and the system mouse pointer can leave the game screen causing issues with the OS.

Steps to reproduce the bug

1. Bind Grab Mouse to physical key.
2. Start game
3. Press bound Grab Mouse key

Environment information

• OS: Android versions 6, 10 and 12 (likely all versions)

Note

Android has supported mouse grab since version 8 and other open source emulators (notably Magic DosBox) use it to good effect.

Start by reproducing the Grab Mouse and Game Focus Mode behavior on Android, then trace the Android input handling used by those actions. Done means the pointer remains confined to the game screen and mouse clicks cannot activate the Android notification tray.