(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_GetNumJoystickBalls

Get the number of trackballs on a joystick.

Header File

Defined in <SDL3/SDL_joystick.h>

Syntax

int SDL_GetNumJoystickBalls(SDL_Joystick *joystick);

Function Parameters

SDL_Joystick *

joystick

an SDL_Joystick structure containing joystick information.

Return Value

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

Remarks

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

Most joysticks do not have trackballs.

Version

This function is available since SDL 3.1.3.

See Also

• SDL_GetJoystickBall
• SDL_GetNumJoystickAxes
• SDL_GetNumJoystickButtons
• SDL_GetNumJoystickHats

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CategoryAPI, CategoryAPIFunction, CategoryJoystick

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