devela::_dep::sdl3::sys::everything

Function SDL_GetNumJoystickBalls

pub unsafe extern "C" fn SDL_GetNumJoystickBalls(
    joystick: *mut SDL_Joystick,
) -> i32
Available on crate feature dep_sdl3 only.
Expand description

Get the number of trackballs on a joystick.

Joystick trackballs have only relative motion events associated with them and their state cannot be polled.

Most joysticks do not have trackballs.

§Parameters

  • joystick: an SDL_Joystick structure containing joystick information.

§Return value

Returns the number of trackballs on success or -1 on failure; call SDL_GetError() for more information.

§Availability

This function is available since SDL 3.2.0.

§See also