annotate include/SDL_keyboard.h @ 4013:5804139bdf0b SDL-1.2

Use GL direct updates when possible
author Sam Lantinga <slouken@libsdl.org>
date Sat, 07 Jul 2007 19:22:27 +0000
parents 1ff64ad478b2
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* Include file for SDL keyboard event handling */
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24
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25 #ifndef _SDL_keyboard_h
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26 #define _SDL_keyboard_h
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27
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28 #include "SDL_stdinc.h"
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29 #include "SDL_error.h"
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30 #include "SDL_keysym.h"
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31
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32 #include "begin_code.h"
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33 /* Set up for C function definitions, even when using C++ */
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34 #ifdef __cplusplus
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35 extern "C" {
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36 #endif
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37
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38 /* Keysym structure
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39 - The scancode is hardware dependent, and should not be used by general
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40 applications. If no hardware scancode is available, it will be 0.
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41
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42 - The 'unicode' translated character is only available when character
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43 translation is enabled by the SDL_EnableUNICODE() API. If non-zero,
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44 this is a UNICODE character corresponding to the keypress. If the
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45 high 9 bits of the character are 0, then this maps to the equivalent
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46 ASCII character:
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47 char ch;
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48 if ( (keysym.unicode & 0xFF80) == 0 ) {
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49 ch = keysym.unicode & 0x7F;
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50 } else {
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51 An international character..
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52 }
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53 */
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54 typedef struct SDL_keysym {
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55 Uint8 scancode; /* hardware specific scancode */
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56 SDLKey sym; /* SDL virtual keysym */
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57 SDLMod mod; /* current key modifiers */
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58 Uint16 unicode; /* translated character */
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59 } SDL_keysym;
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60
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61 /* This is the mask which refers to all hotkey bindings */
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62 #define SDL_ALL_HOTKEYS 0xFFFFFFFF
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63
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64 /* Function prototypes */
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65 /*
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66 * Enable/Disable UNICODE translation of keyboard input.
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67 * This translation has some overhead, so translation defaults off.
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68 * If 'enable' is 1, translation is enabled.
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69 * If 'enable' is 0, translation is disabled.
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70 * If 'enable' is -1, the translation state is not changed.
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71 * It returns the previous state of keyboard translation.
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72 */
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73 extern DECLSPEC int SDLCALL SDL_EnableUNICODE(int enable);
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74
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75 /*
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76 * Enable/Disable keyboard repeat. Keyboard repeat defaults to off.
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77 * 'delay' is the initial delay in ms between the time when a key is
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78 * pressed, and keyboard repeat begins.
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79 * 'interval' is the time in ms between keyboard repeat events.
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80 */
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81 #define SDL_DEFAULT_REPEAT_DELAY 500
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82 #define SDL_DEFAULT_REPEAT_INTERVAL 30
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83 /*
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84 * If 'delay' is set to 0, keyboard repeat is disabled.
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85 */
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86 extern DECLSPEC int SDLCALL SDL_EnableKeyRepeat(int delay, int interval);
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87 extern DECLSPEC void SDLCALL SDL_GetKeyRepeat(int *delay, int *interval);
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88
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89 /*
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90 * Get a snapshot of the current state of the keyboard.
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91 * Returns an array of keystates, indexed by the SDLK_* syms.
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92 * Used:
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93 * Uint8 *keystate = SDL_GetKeyState(NULL);
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94 * if ( keystate[SDLK_RETURN] ) ... <RETURN> is pressed.
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95 */
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96 extern DECLSPEC Uint8 * SDLCALL SDL_GetKeyState(int *numkeys);
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97
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98 /*
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99 * Get the current key modifier state
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100 */
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101 extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void);
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102
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103 /*
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104 * Set the current key modifier state
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105 * This does not change the keyboard state, only the key modifier flags.
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106 */
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107 extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);
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108
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109 /*
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110 * Get the name of an SDL virtual keysym
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111 */
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112 extern DECLSPEC char * SDLCALL SDL_GetKeyName(SDLKey key);
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113
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114
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115 /* Ends C function definitions when using C++ */
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116 #ifdef __cplusplus
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117 }
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118 #endif
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119 #include "close_code.h"
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120
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121 #endif /* _SDL_keyboard_h */