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annotate include/SDL_keyboard.h @ 2445:d65e44861a15 gsoc2008_iphone

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added comment
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Sat, 16 Aug 2008 00:09:10 +0000
parents d87417504c75
children 99210400e8b9
rev   line source
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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 /**
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24 * \file SDL_keyboard.h
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25 *
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26 * Include file for SDL keyboard event handling
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27 */
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28
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29 #ifndef _SDL_keyboard_h
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30 #define _SDL_keyboard_h
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31
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32 #include "SDL_stdinc.h"
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33 #include "SDL_error.h"
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34 #include "SDL_keysym.h"
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35
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36 #include "begin_code.h"
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37 /* Set up for C function definitions, even when using C++ */
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38 #ifdef __cplusplus
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39 /* *INDENT-OFF* */
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40 extern "C" {
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41 /* *INDENT-ON* */
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42 #endif
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43
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44 /**
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45 * \struct SDL_keysym
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46 *
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47 * \brief The SDL keysym structure, used in key events.
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48 */
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49 typedef struct SDL_keysym
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50 {
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51 SDL_scancode scancode; /**< SDL physical key code - see ::SDL_scancode for details */
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52 SDLKey sym; /**< SDL virtual key code - see ::SDLKey for details */
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53 Uint16 mod; /**< current key modifiers */
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54 Uint32 unicode; /**< OBSOLETE, use SDL_TextInputEvent instead */
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55 } SDL_keysym;
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56
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57 /* Function prototypes */
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58
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59 /**
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60 * \fn int SDL_GetNumKeyboards(void)
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61 *
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62 * \brief Get the number of keyboard input devices available.
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63 *
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64 * \sa SDL_SelectKeyboard()
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65 */
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66 extern DECLSPEC int SDLCALL SDL_GetNumKeyboards(void);
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67
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68 /**
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69 * \fn int SDL_SelectKeyboard(int index)
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70 *
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71 * \brief Set the index of the currently selected keyboard.
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72 *
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73 * \return The index of the previously selected keyboard.
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74 *
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75 * \note You can query the currently selected keyboard by passing an index of -1.
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76 *
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77 * \sa SDL_GetNumKeyboards()
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78 */
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79 extern DECLSPEC int SDLCALL SDL_SelectKeyboard(int index);
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80
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81 /**
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82 * \fn Uint8 *SDL_GetKeyboardState(int *numkeys)
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83 *
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84 * \brief Get a snapshot of the current state of the selected keyboard.
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85 *
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86 * \param numkeys if non-NULL, receives the length of the returned array.
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87 *
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88 * \return An array of key states. Indexes into this array are obtained by using ::SDL_scancode values.
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89 *
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90 * Example:
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91 * Uint8 *state = SDL_GetKeyboardState(NULL);
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92 * if ( state[SDL_SCANCODE_RETURN)] ) ... <RETURN> is pressed.
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93 */
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94 extern DECLSPEC Uint8 *SDLCALL SDL_GetKeyboardState(int *numkeys);
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95
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96 /**
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97 * \fn SDLMod SDL_GetModState(void)
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98 *
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99 * \brief Get the current key modifier state for the selected keyboard.
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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 * \fn void SDL_SetModState(SDLMod modstate)
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105 *
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106 * \brief Set the current key modifier state for the selected keyboard.
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107 *
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108 * \note This does not change the keyboard state, only the key modifier flags.
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109 */
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110 extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);
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111
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112 /**
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113 * \fn SDLKey SDL_GetKeyFromScancode(SDL_scancode scancode)
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114 *
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115 * \brief Get the key code corresponding to the given scancode according to the current keyboard layout.
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116 *
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117 * See ::SDLKey for details.
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118 *
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119 * \sa SDL_GetKeyName()
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120 */
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121 extern DECLSPEC SDLKey SDLCALL SDL_GetKeyFromScancode(SDL_scancode scancode);
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122
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123 /**
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124 * \fn SDL_scancode SDL_GetScancodeFromKey(SDLKey key)
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125 *
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126 * \brief Get the scancode corresponding to the given key code according to the current keyboard layout.
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127 *
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128 * See ::SDL_scancode for details.
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129 *
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130 * \sa SDL_GetScancodeName()
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131 */
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132 extern DECLSPEC SDL_scancode SDLCALL SDL_GetScancodeFromKey(SDLKey key);
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134 /**
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135 * \fn const char *SDL_GetScancodeName(SDL_scancode scancode)
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136 *
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137 * \brief Get a human-readable name for a scancode.
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138 *
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139 * \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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140 *
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141 * \sa SDL_scancode
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142 */
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143 extern DECLSPEC const char *SDLCALL SDL_GetScancodeName(SDL_scancode
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144 scancode);
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145
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146 /**
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147 * \fn const char *SDL_GetKeyName(SDLKey key)
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148 *
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149 * \brief Get a human-readable name for a key.
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150 *
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151 * \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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152 *
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153 * \sa SDLKey
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154 */
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155 extern DECLSPEC const char *SDLCALL SDL_GetKeyName(SDLKey key);
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156
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157
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158 /* Ends C function definitions when using C++ */
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159 #ifdef __cplusplus
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160 /* *INDENT-OFF* */
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161 }
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162 /* *INDENT-ON* */
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163 #endif
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164 #include "close_code.h"
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165
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166 #endif /* _SDL_keyboard_h */
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167
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168 /* vi: set ts=4 sw=4 expandtab: */