###### (This is the legacy documentation for SDL2, the previous stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current stable 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)

## Syntax

```c
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;
```

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[CategoryAPI](CategoryAPI), [CategoryAPIStruct](CategoryAPIStruct), [CategoryEvents](CategoryEvents)