/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2012 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_keyboard.h

 *  Include file for SDL keyboard event handling

 */

#ifndef _SDL_keyboard_h

#define _SDL_keyboard_h

#include "SDL_stdinc.h"

#include "SDL_error.h"

#include "SDL_keysym.h"

#include "begin_code.h"

/* Set up for C function definitions, even when using C++ */

#ifdef __cplusplus

extern "C" {

#endif

/** Keysym structure

 *

 *  - The scancode is hardware dependent, and should not be used by general

 *    applications.  If no hardware scancode is available, it will be 0.

 *

 *  - The 'unicode' translated character is only available when character

 *    translation is enabled by the SDL_EnableUNICODE() API.  If non-zero,

 *    this is a UNICODE character corresponding to the keypress.  If the

 *    high 9 bits of the character are 0, then this maps to the equivalent

 *    ASCII character:

 *      @code

 *	char ch;

 *	if ( (keysym.unicode & 0xFF80) == 0 ) {

 *		ch = keysym.unicode & 0x7F;

 *	} else {

 *		An international character..

 *	}

 *      @endcode

 */

typedef struct SDL_keysym {

	Uint8 scancode;			/**< hardware specific scancode */

	SDLKey sym;			/**< SDL virtual keysym */

	SDLMod mod;			/**< current key modifiers */

	Uint16 unicode;			/**< translated character */

} SDL_keysym;

/** This is the mask which refers to all hotkey bindings */

#define SDL_ALL_HOTKEYS		0xFFFFFFFF

/* Function prototypes */

/**

 * Enable/Disable UNICODE translation of keyboard input.

 *

 * This translation has some overhead, so translation defaults off.

 *

 * @param[in] enable

 * If 'enable' is 1, translation is enabled.

 * If 'enable' is 0, translation is disabled.

 * If 'enable' is -1, the translation state is not changed.

 *

 * @return It returns the previous state of keyboard translation.

 */

extern DECLSPEC int SDLCALL SDL_EnableUNICODE(int enable);

#define SDL_DEFAULT_REPEAT_DELAY	500

#define SDL_DEFAULT_REPEAT_INTERVAL	30

/**

 * Enable/Disable keyboard repeat.  Keyboard repeat defaults to off.

 *

 *  @param[in] delay

 *  'delay' is the initial delay in ms between the time when a key is

 *  pressed, and keyboard repeat begins.

 *

 *  @param[in] interval

 *  'interval' is the time in ms between keyboard repeat events.

 *

 *  If 'delay' is set to 0, keyboard repeat is disabled.

 */

extern DECLSPEC int SDLCALL SDL_EnableKeyRepeat(int delay, int interval);

extern DECLSPEC void SDLCALL SDL_GetKeyRepeat(int *delay, int *interval);

/**

 * Get a snapshot of the current state of the keyboard.

 * Returns an array of keystates, indexed by the SDLK_* syms.

 * Usage:

 *	@code

 * 	Uint8 *keystate = SDL_GetKeyState(NULL);

 *	if ( keystate[SDLK_RETURN] ) //... \<RETURN> is pressed.

 *	@endcode

 */

extern DECLSPEC Uint8 * SDLCALL SDL_GetKeyState(int *numkeys);

/**

 * Get the current key modifier state

 */

extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void);

/**

 * Set the current key modifier state.

 * This does not change the keyboard state, only the key modifier flags.

 */

extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);

/**

 * Get the name of an SDL virtual keysym

 */

extern DECLSPEC char * SDLCALL SDL_GetKeyName(SDLKey key);

/* Ends C function definitions when using C++ */

#ifdef __cplusplus

}

#endif

#include "close_code.h"

#endif /* _SDL_keyboard_h */