/*
SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
+ 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
slouken@libsdl.org
*/
-/* Include file for SDL joystick event handling */
+/** @file SDL_joystick.h
+ * Include file for SDL joystick event handling
+ */
#ifndef _SDL_joystick_h
#define _SDL_joystick_h
extern "C" {
#endif
-/* 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.
-*/
+/** @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 */
+/** 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 - the index passed as an argument refers to
+/**
+ * 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.
*
- * This function returns a joystick identifier, or NULL if an error occurred.
+ * @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.
- * The state can be one of SDL_QUERY, SDL_ENABLE or SDL_IGNORE.
+ *
+ * @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
- * The state is a value ranging from -32768 to 32767.
- * The axis indices start at index 0.
+ *
+ * @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);
-/*
- * Get the current state of a POV hat on a joystick
- * The return value is one of the following positions:
+/**
+ * @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_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)
-/*
- * The hat indices start at index 0.
+/*@}*/
+
+/**
+ * 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
- * This returns 0, or -1 if you passed it invalid parameters.
- * The ball indices start at index 0.
+ *
+ * @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
- * The button indices start at index 0.
+ *
+ * @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);
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