bionic (3) SDL_JoyBallEvent.3.gz

Provided by: libsdl1.2-dev_1.2.15+dfsg2-0.1ubuntu0.2_amd64 bug

NAME
       SDL_JoyBallEvent - Joystick trackball motion event structure


STRUCTURE DEFINITION
       typedef struct{
         Uint8 type;
         Uint8 which;
         Uint8 ball;
         Sint16 xrel, yrel;
       } SDL_JoyBallEvent;


STRUCTURE DATA
       type                SDL_JOYBALLMOTION

       which               Joystick device index

       ball                Joystick trackball index

       xrel, yrel          The relative motion in the X/Y direction


DESCRIPTION
       SDL_JoyBallEvent  is  a member of the SDL_Event union and is used when an event of type SDL_JOYBALLMOTION
       is reported.

       A SDL_JOYBALLMOTION event occurs when a user moves a trackball on the joystick. The field  which  is  the
       index of the joystick that reported the event and ball is the index of the trackball (for a more detailed
       explaination see the Joystick section). Trackballs only return relative motion, this  is  the  change  in
       position on the ball since it was last polled (last cycle of the event loop) and it is stored in xrel and
       yrel.


SEE ALSO
       SDL_Event, Joystick Functions, SDL_JoystickEventState, SDL_JoystickGetBall