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       joystick_sethandler,  joystick_setdefaulthandler  -  set  the  joystick
       event handler.


       #include <vgajoystick.h>
       typedef void (*__joystick_handler) (int event, int number, char  value,
       int joydev);

       void joystick_sethandler(int joydev, __joystick_handler jh);
       void joystick_setdefaulthandler(int joydev);


       By  default,  each call to joystick_init(3) enables the default handler
       for the opened joystick. This handler maintains a state table which can
       be    read    by    the   joystick_getaxis(3),   joystick_getbutton(3),
       joystick_button1|2|3|4(3),  joystick_getb1|2|3|4(3),  joystick_x|y|z(3)
       and joystick_getx|y|z(3) functions.

       If you define an own handler, the following parameters are passed:

              event one of the following values:

                     JOY_EVENTBUTTONDOWN a button was pressed.

                     JOY_EVENTBUTTONUP a button was released.

                     JOY_EVENTAXIS the joystick position was changed.

                     All other values are reserved for future use.

              number  identifies  the  button  or  axis  to  which  this event

              value for axis events the new position in range -128 ..  127.See
                     joystick_getaxis(3) for further comments on the range.

              joydev  identifies the joystick affected (this allows to use one
                     handler for many joysticks).

       joydev = -1 modifies the event handler of all currently  open  joystick


       This  function  is  only  available  in ELF versions of svgalib. Due to
       backwards compatibility issues it cannot  be  used  with  shared  a.out


       svgalib(7),   vgagl(7),   libvga.config(5),   joytest(6),  mjoytest(6),
       joystick_init(3),        joystick_close(3),         joystick_update(3),
       joystick_getnumaxes(3), joystick_getnumbuttons(3), joystick_getaxis(3),
       joystick_getbutton(3),     joystick_button1(3),      joystick_getb1(3),
       joystick_x(3), joystick_getx(3).


       The  svgalib  joystick  handler  was  mostly  done by Daniel Engstr\"om
       <>.  Multiple joystick, VC switching support
       and  code  to  glue  it  into  svgalib  by  Michael Weller <eowmob@exp->. Part of the code is based on code from C. Smith and
       Vojtech Pavlik.