Joystick trackball motion event structure (event.jball.*)
Defined in [SDL_events.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_events.h), but apps should _only_ `#include "SDL.h"`!
typedef struct SDL_JoyBallEvent
{/**< ::SDL_JOYBALLMOTION */
Uint32 type; /**< In milliseconds, populated using SDL_GetTicks() */
Uint32 timestamp; /**< The joystick instance id */
SDL_JoystickID which; /**< The joystick trackball index */
Uint8 ball;
Uint8 padding1;
Uint8 padding2;
Uint8 padding3;/**< The relative motion in the X direction */
Sint16 xrel; /**< The relative motion in the Y direction */
Sint16 yrel; } SDL_JoyBallEvent;
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 |
CategoryAPI, CategoryAPIStruct, CategoryStruct, CategoryEvents