include/SDL_keyboard.h
author Holmes Futrell <hfutrell@umail.ucsb.edu>
Fri, 18 Jul 2008 19:10:50 +0000
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/**
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 * \file SDL_keyboard.h
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 *
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 * Include file for SDL keyboard event handling
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 */
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#ifndef _SDL_keyboard_h
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#define _SDL_keyboard_h
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#include "SDL_stdinc.h"
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#include "SDL_error.h"
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#include "SDL_keysym.h"
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
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/**
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 * \struct SDL_keysym
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 *
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 * \brief The SDL keysym structure, used in key events.
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 */
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typedef struct SDL_keysym
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{
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    SDL_scancode scancode;      /**< SDL physical key code - see ::SDL_scancode for details */
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    SDLKey sym;                 /**< SDL virtual key code - see ::SDLKey for details */
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    Uint16 mod;                 /**< current key modifiers */
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    Uint32 unicode;             /**< OBSOLETE, use SDL_TextInputEvent instead */
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} SDL_keysym;
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/* Function prototypes */
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/**
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 * \fn int SDL_GetNumKeyboards(void)
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 *
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 * \brief Get the number of keyboard input devices available.
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 *
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 * \sa SDL_SelectKeyboard()
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 */
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extern DECLSPEC int SDLCALL SDL_GetNumKeyboards(void);
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/**
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 * \fn int SDL_SelectKeyboard(int index)
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 *
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 * \brief Set the index of the currently selected keyboard.
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 *
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 * \return The index of the previously selected keyboard.
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 *
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 * \note You can query the currently selected keyboard by passing an index of -1.
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 *
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 * \sa SDL_GetNumKeyboards()
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 */
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extern DECLSPEC int SDLCALL SDL_SelectKeyboard(int index);
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/**
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 * \fn Uint8 *SDL_GetKeyboardState(int *numkeys)
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 *
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 * \brief Get a snapshot of the current state of the selected keyboard.
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 *
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 * \param numkeys if non-NULL, receives the length of the returned array.
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 *
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 * \return An array of key states. Indexes into this array are obtained by using ::SDL_scancode values.
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 *
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 * Example:
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 * 	Uint8 *state = SDL_GetKeyboardState(NULL);
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 *	if ( state[SDL_SCANCODE_RETURN)] ) ... <RETURN> is pressed.
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 */
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extern DECLSPEC Uint8 *SDLCALL SDL_GetKeyboardState(int *numkeys);
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/**
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 * \fn SDLMod SDL_GetModState(void)
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 *
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 * \brief Get the current key modifier state for the selected keyboard.
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 */
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extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void);
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/**
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 * \fn void SDL_SetModState(SDLMod modstate)
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 *
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 * \brief Set the current key modifier state for the selected keyboard.
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 *
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 * \note This does not change the keyboard state, only the key modifier flags.
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 */
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extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);
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/**
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 * \fn SDLKey SDL_GetKeyFromScancode(SDL_scancode scancode)
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 * 
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 * \brief Get the key code corresponding to the given scancode according to the current keyboard layout.
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 *
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 * See ::SDLKey for details.
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 *
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 * \sa SDL_GetKeyName()
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 */
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extern DECLSPEC SDLKey SDLCALL SDL_GetKeyFromScancode(SDL_scancode scancode);
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/**
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 * \fn SDL_scancode SDL_GetScancodeFromKey(SDLKey key)
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 * 
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 * \brief Get the scancode corresponding to the given key code according to the current keyboard layout.
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 *
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 * See ::SDL_scancode for details.
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 *
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 * \sa SDL_GetScancodeName()
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 */
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extern DECLSPEC SDL_scancode SDLCALL SDL_GetScancodeFromKey(SDLKey key);
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/**
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 * \fn const char *SDL_GetScancodeName(SDL_scancode scancode)
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 * 
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 * \brief Get a human-readable name for a scancode.
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 *
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 * \return A pointer to a UTF-8 string that stays valid at least until the next call to this function. If you need it around any longer, you must copy it.  If the scancode doesn't have a name, this function returns "".
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 *
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 * \sa SDL_scancode
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 */
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extern DECLSPEC const char *SDLCALL SDL_GetScancodeName(SDL_scancode
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                                                        scancode);
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/**
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 * \fn const char *SDL_GetKeyName(SDLKey key)
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 * 
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 * \brief Get a human-readable name for a key.
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 *
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 * \return A pointer to a UTF-8 string that stays valid at least until the next call to this function. If you need it around any longer, you must copy it.  If the key doesn't have a name, this function returns "".
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 *
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 * \sa SDLKey
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 */
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extern DECLSPEC const char *SDLCALL SDL_GetKeyName(SDLKey key);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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}
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/* *INDENT-ON* */
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#endif
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#include "close_code.h"
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#endif /* _SDL_keyboard_h */
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/* vi: set ts=4 sw=4 expandtab: */