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annotate include/SDL_keyboard.h @ 4446:8b03a20b320f

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Much improved multi-display support for iPad. Fixes most issues and limitations, I think.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 02 May 2010 05:08:12 -0400
parents f7b03b6838cb
children 3e69e077cb95
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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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18
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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 * \brief The SDL keysym structure, used in key events.
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46 */
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47 typedef struct SDL_keysym
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48 {
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49 SDL_scancode scancode; /**< SDL physical key code - see ::SDL_scancode for details */
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50 SDLKey sym; /**< SDL virtual key code - see ::SDLKey for details */
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51 Uint16 mod; /**< current key modifiers */
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52 Uint32 unicode; /**< \deprecated use SDL_TextInputEvent instead */
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53 } SDL_keysym;
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54
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55 /* Function prototypes */
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56
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57 /**
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58 * \brief Get the number of keyboard input devices available.
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59 *
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60 * \sa SDL_SelectKeyboard()
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61 */
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62 extern DECLSPEC int SDLCALL SDL_GetNumKeyboards(void);
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63
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64 /**
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65 * \brief Set the index of the currently selected keyboard.
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66 *
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67 * \return The index of the previously selected keyboard.
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68 *
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69 * \note You can query the currently selected keyboard by passing an index of -1.
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70 *
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71 * \sa SDL_GetNumKeyboards()
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72 */
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73 extern DECLSPEC int SDLCALL SDL_SelectKeyboard(int index);
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74
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75 /**
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76 * \brief Get a snapshot of the current state of the selected keyboard.
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77 *
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78 * \param numkeys if non-NULL, receives the length of the returned array.
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79 *
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80 * \return An array of key states. Indexes into this array are obtained by using ::SDL_scancode values.
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81 *
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82 * \b Example:
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83 * \code
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84 * Uint8 *state = SDL_GetKeyboardState(NULL);
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85 * if ( state[SDL_SCANCODE_RETURN] ) {
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86 * printf("<RETURN> is pressed.\n");
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87 * }
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88 * \endcode
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89 */
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90 extern DECLSPEC Uint8 *SDLCALL SDL_GetKeyboardState(int *numkeys);
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91
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92 /**
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93 * \brief Get the current key modifier state for the selected keyboard.
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94 */
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95 extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void);
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96
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97 /**
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98 * \brief Set the current key modifier state for the selected keyboard.
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99 *
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100 * \note This does not change the keyboard state, only the key modifier flags.
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101 */
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102 extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);
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103
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104 /**
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105 * \brief Get the key code corresponding to the given scancode according to the
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106 * current keyboard layout.
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107 *
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108 * See ::SDLKey for details.
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109 *
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110 * \sa SDL_GetKeyName()
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111 */
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112 extern DECLSPEC SDLKey SDLCALL SDL_GetKeyFromScancode(SDL_scancode scancode);
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113
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114 /**
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115 * \brief Get the scancode corresponding to the given key code according to the
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116 * current keyboard layout.
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117 *
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118 * See ::SDL_scancode for details.
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119 *
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120 * \sa SDL_GetScancodeName()
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121 */
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122 extern DECLSPEC SDL_scancode SDLCALL SDL_GetScancodeFromKey(SDLKey key);
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123
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124 /**
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125 * \brief Get a human-readable name for a scancode.
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126 *
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127 * \return A pointer to a UTF-8 string that stays valid at least until the next
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128 * call to this function. If you need it around any longer, you must
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129 * copy it. If the scancode doesn't have a name, this function returns
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130 * an empty string ("").
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131 *
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132 * \sa SDL_scancode
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133 */
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134 extern DECLSPEC const char *SDLCALL SDL_GetScancodeName(SDL_scancode
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135 scancode);
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136
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137 /**
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138 * \brief Get a human-readable name for a key.
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139 *
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140 * \return A pointer to a UTF-8 string that stays valid at least until the next
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141 * call to this function. If you need it around any longer, you must
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142 * copy it. If the key doesn't have a name, this function returns an
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143 * empty string ("").
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144 *
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145 * \sa SDLKey
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146 */
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147 extern DECLSPEC const char *SDLCALL SDL_GetKeyName(SDLKey key);
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148
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149 /**
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150 * \brief Start accepting Unicode text input events.
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151 *
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152 * \sa SDL_StopTextInput()
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153 * \sa SDL_SetTextInputRect()
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154 */
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155 extern DECLSPEC void SDLCALL SDL_StartTextInput(void);
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156
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157 /**
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158 * \brief Stop receiving any text input events.
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159 *
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160 * \sa SDL_StartTextInput()
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161 */
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162 extern DECLSPEC void SDLCALL SDL_StopTextInput(void);
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163
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164 /**
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165 * \brief Set the rectangle used to type Unicode text inputs.
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166 *
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167 * \sa SDL_StartTextInput()
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168 */
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169 extern DECLSPEC void SDLCALL SDL_SetTextInputRect(SDL_Rect *rect);
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170
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171
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172 /* Ends C function definitions when using C++ */
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173 #ifdef __cplusplus
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174 /* *INDENT-OFF* */
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175 }
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176 /* *INDENT-ON* */
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177 #endif
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178 #include "close_code.h"
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179
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180 #endif /* _SDL_keyboard_h */
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181
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182 /* vi: set ts=4 sw=4 expandtab: */