(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)

SDL_JoyBallEvent

Joystick trackball motion event structure (event.jball.*)

Header File

Defined in [SDL_events.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_events.h), but apps should _only_ `#include "SDL.h"`!

Syntax

typedef struct SDL_JoyBallEvent
{
    Uint32 type;        /**< ::SDL_JOYBALLMOTION */
    Uint32 timestamp;   /**< In milliseconds, populated using SDL_GetTicks() */
    SDL_JoystickID which; /**< The joystick instance id */
    Uint8 ball;         /**< The joystick trackball index */
    Uint8 padding1;
    Uint8 padding2;
    Uint8 padding3;
    Sint16 xrel;        /**< The relative motion in the X direction */
    Sint16 yrel;        /**< The relative motion in the Y direction */
} SDL_JoyBallEvent;

Data Fields

Uint32	type	SDL_JOYBALLMOTION
Uint32	timestamp	timestamp of the event
SDL_JoystickID	which	the instance id of the joystick that reported the event
Uint8	ball	the index of the trackball that changed
Sint16	xrel	the relative motion in the X direction
Sint16	yrel	the relative motion in the Y direction

Related Enumerations

SDL_EventType

Related Structures

SDL_Event

SDL_JoyAxisEvent

SDL_JoyButtonEvent

SDL_JoyHatEvent

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CategoryAPI, CategoryAPIStruct, CategoryStruct, CategoryEvents

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