NAME

       joystick_sethandler, joystick_setdefaulthandler - set the joystick event handler.

SYNOPSIS

       #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);

DESCRIPTION

       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 belongs.

              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 devices.

CAVEATS

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

SEE ALSO

       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).

AUTHOR

       The  svgalib  joystick  handler  was  mostly  done  by  Daniel  Engstr\"om <daniel.engstrom@riksnett.no>.
       Multiple joystick, VC switching support and code to glue it into svgalib by Michael  Weller  <eowmob@exp-
       math.uni-essen.de>. Part of the code is based on code from C. Smith and Vojtech Pavlik.