view include/SDL_keyboard.h @ 4170:092c0bc69155 SDL-1.2

Fixed bug #618 Description From Tim Angus 2008-08-30 12:23:56 (-) [reply] As we all know SDL 1.2 doesn't handle dead keys well since one key press potentially equals two (or more) characters. For example, on many layouts, keying <backquote>,<space> results in <no character>,<backquote><space>. Since the unicode member of the SDL_keysym struct only has room for one character, only one can be returned. On Linux, the first character is returned. On Windows however, unless the exact number of characters generated by the keypress is 1, nothing is returned. The following patch addresses this inconsistency. Updated patch which includes a further fix to the handling of the numpad when numlock is on. This further fix is courtesy Amanieu d'Antras.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 08:42:09 +0000
parents a1b03ba2fcd0
children 4c4113c2162c
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/*
    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
*/

/* 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:
	char ch;
	if ( (keysym.unicode & 0xFF80) == 0 ) {
		ch = keysym.unicode & 0x7F;
	} else {
		An international character..
	}
 */
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.
 * If 'enable' is 1, translation is enabled.
 * If 'enable' is 0, translation is disabled.
 * If 'enable' is -1, the translation state is not changed.
 * It returns the previous state of keyboard translation.
 */
extern DECLSPEC int SDLCALL SDL_EnableUNICODE(int enable);

/*
 * Enable/Disable keyboard repeat.  Keyboard repeat defaults to off.
 * 'delay' is the initial delay in ms between the time when a key is
 * pressed, and keyboard repeat begins.
 * 'interval' is the time in ms between keyboard repeat events.
 */
#define SDL_DEFAULT_REPEAT_DELAY	500
#define SDL_DEFAULT_REPEAT_INTERVAL	30
/*
 * 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.
 * Used:
 * 	Uint8 *keystate = SDL_GetKeyState(NULL);
 *	if ( keystate[SDLK_RETURN] ) ... <RETURN> is pressed.
 */
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 */