Locking cursor on macOS stops dx dy

[dapetcu21]

After calling defos.set_cursor_locked(true) on macOS, Defold doesn’t receive dx/dy events anymore. I suspect it’s because Defold’s input code diffs mouse positions instead of using NSEvent.deltaX and NSEvent.deltaY.

I tried locking the cursor both by calling CGAssociateMouseAndMouseCursorPosition(false) and by repeatedly setting the mouse position to the same point each frame with CGWarpMouseCursorPosition() and I got the same results.