joystick_update(3) [linux man page]

joystick_update(3)						Svgalib User Manual						joystick_update(3)

NAME

       joystick_update - query joysticks for status changes

SYNOPSIS

       #include <vgajoystick.h>

       int joystick_update(void);

DESCRIPTION

       queries all currently opened joysticks for position changes and calls the appropriate event handlers.

       A non-zero value is returned if and only if any joystick reported a position change. In more detail the logical and of the return value and
       (1 << joydev) is non-zero if this joystick status changed.

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_sethandler(3), joystick_set-
       defaulthandler(3), joystick_getnumaxes(3), joystick_getnumbuttons(3), joystick_getaxis(3), joystick_getbutton(3), joystick_button1(3), joy-
       stick_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.

Svgalib 1.3.0							   14 April 1998						joystick_update(3)

joystick_sethandler(3)						Svgalib User Manual					    joystick_sethandler(3)

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_getnu-
       maxes(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.

Svgalib 1.3.0							   14 April 1998					    joystick_sethandler(3)