Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
branch: emulate
Fetching contributors…

Cannot retrieve contributors at this time

188 lines (157 sloc) 5.532 kB
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/** @file SDL_joystick.h
* Include file for SDL joystick event handling
*/
#ifndef _SDL_joystick_h
#define _SDL_joystick_h
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
/** @file SDL_joystick.h
* @note In order to use these functions, SDL_Init() must have been called
* with the SDL_INIT_JOYSTICK flag. This causes SDL to scan the system
* for joysticks, and load appropriate drivers.
*/
/** The joystick structure used to identify an SDL joystick */
struct _SDL_Joystick;
typedef struct _SDL_Joystick SDL_Joystick;
/* Function prototypes */
/**
* Count the number of joysticks attached to the system
*/
extern DECLSPEC int SDLCALL SDL_NumJoysticks(void);
/**
* Get the implementation dependent name of a joystick.
*
* This can be called before any joysticks are opened.
* If no name can be found, this function returns NULL.
*/
extern DECLSPEC const char * SDLCALL SDL_JoystickName(int device_index);
/**
* Open a joystick for use.
*
* @param[in] device_index
* The index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* @return This function returns a joystick identifier, or NULL if an error occurred.
*/
extern DECLSPEC SDL_Joystick * SDLCALL SDL_JoystickOpen(int device_index);
/**
* Returns 1 if the joystick has been opened, or 0 if it has not.
*/
extern DECLSPEC int SDLCALL SDL_JoystickOpened(int device_index);
/**
* Get the device index of an opened joystick.
*/
extern DECLSPEC int SDLCALL SDL_JoystickIndex(SDL_Joystick *joystick);
/**
* Get the number of general axis controls on a joystick
*/
extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick *joystick);
/**
* Get the number of trackballs on a joystick
*
* Joystick trackballs have only relative motion events associated
* with them and their state cannot be polled.
*/
extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick *joystick);
/**
* Get the number of POV hats on a joystick
*/
extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick *joystick);
/**
* Get the number of buttons on a joystick
*/
extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick *joystick);
/**
* Update the current state of the open joysticks.
*
* This is called automatically by the event loop if any joystick
* events are enabled.
*/
extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void);
/**
* Enable/disable joystick event polling.
*
* If joystick events are disabled, you must call SDL_JoystickUpdate()
* yourself and check the state of the joystick when you want joystick
* information.
*
* @param[in] state The state can be one of SDL_QUERY, SDL_ENABLE or SDL_IGNORE.
*/
extern DECLSPEC int SDLCALL SDL_JoystickEventState(int state);
/**
* Get the current state of an axis control on a joystick
*
* @param[in] axis The axis indices start at index 0.
*
* @return The state is a value ranging from -32768 to 32767.
*/
extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis);
/**
* @name Hat Positions
* The return value of SDL_JoystickGetHat() is one of the following positions:
*/
/*@{*/
#define SDL_HAT_CENTERED 0x00
#define SDL_HAT_UP 0x01
#define SDL_HAT_RIGHT 0x02
#define SDL_HAT_DOWN 0x04
#define SDL_HAT_LEFT 0x08
#define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP)
#define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN)
#define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP)
#define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN)
/*@}*/
/**
* Get the current state of a POV hat on a joystick
*
* @param[in] hat The hat indices start at index 0.
*/
extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick *joystick, int hat);
/**
* Get the ball axis change since the last poll
*
* @param[in] ball The ball indices start at index 0.
*
* @return This returns 0, or -1 if you passed it invalid parameters.
*/
extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy);
/**
* Get the current state of a button on a joystick
*
* @param[in] button The button indices start at index 0.
*/
extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick *joystick, int button);
/**
* Close a joystick previously opened with SDL_JoystickOpen()
*/
extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick *joystick);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"
#endif /* _SDL_joystick_h */
Jump to Line
Something went wrong with that request. Please try again.