git.r.bdr.sh - rbdr/super-polarity/blob - vendor/frameworks/SDL2.framework/Versions/A/Headers/SDL_keyboard.h

   1 /*
   2   Simple DirectMedia Layer
   3   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
   4
   5   This software is provided 'as-is', without any express or implied
   6   warranty.  In no event will the authors be held liable for any damages
   7   arising from the use of this software.
   8
   9   Permission is granted to anyone to use this software for any purpose,
  10   including commercial applications, and to alter it and redistribute it
  11   freely, subject to the following restrictions:
  12
  13   1. The origin of this software must not be misrepresented; you must not
  14      claim that you wrote the original software. If you use this software
  15      in a product, an acknowledgment in the product documentation would be
  16      appreciated but is not required.
  17   2. Altered source versions must be plainly marked as such, and must not be
  18      misrepresented as being the original software.
  19   3. This notice may not be removed or altered from any source distribution.
  20 */
  21
  22 /**
  23  *  \file SDL_keyboard.h
  24  *
  25  *  Include file for SDL keyboard event handling
  26  */
  27
  28 #ifndef _SDL_keyboard_h
  29 #define _SDL_keyboard_h
  30
  31 #include "SDL_stdinc.h"
  32 #include "SDL_error.h"
  33 #include "SDL_keycode.h"
  34 #include "SDL_video.h"
  35
  36 #include "begin_code.h"
  37 /* Set up for C function definitions, even when using C++ */
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 /**
  43  *  \brief The SDL keysym structure, used in key events.
  44  *
  45  *  \note  If you are looking for translated character input, see the ::SDL_TEXTINPUT event.
  46  */
  47 typedef struct SDL_Keysym
  48 {
  49     SDL_Scancode scancode;      /**< SDL physical key code - see ::SDL_Scancode for details */
  50     SDL_Keycode sym;            /**< SDL virtual key code - see ::SDL_Keycode for details */
  51     Uint16 mod;                 /**< current key modifiers */
  52     Uint32 unused;
  53 } SDL_Keysym;
  54
  55 /* Function prototypes */
  56
  57 /**
  58  *  \brief Get the window which currently has keyboard focus.
  59  */
  60 extern DECLSPEC SDL_Window * SDLCALL SDL_GetKeyboardFocus(void);
  61
  62 /**
  63  *  \brief Get a snapshot of the current state of the keyboard.
  64  *
  65  *  \param numkeys if non-NULL, receives the length of the returned array.
  66  *
  67  *  \return An array of key states. Indexes into this array are obtained by using ::SDL_Scancode values.
  68  *
  69  *  \b Example:
  70  *  \code
  71  *  const Uint8 *state = SDL_GetKeyboardState(NULL);
  72  *  if ( state[SDL_SCANCODE_RETURN] )   {
  73  *      printf("<RETURN> is pressed.\n");
  74  *  }
  75  *  \endcode
  76  */
  77 extern DECLSPEC const Uint8 *SDLCALL SDL_GetKeyboardState(int *numkeys);
  78
  79 /**
  80  *  \brief Get the current key modifier state for the keyboard.
  81  */
  82 extern DECLSPEC SDL_Keymod SDLCALL SDL_GetModState(void);
  83
  84 /**
  85  *  \brief Set the current key modifier state for the keyboard.
  86  *
  87  *  \note This does not change the keyboard state, only the key modifier flags.
  88  */
  89 extern DECLSPEC void SDLCALL SDL_SetModState(SDL_Keymod modstate);
  90
  91 /**
  92  *  \brief Get the key code corresponding to the given scancode according
  93  *         to the current keyboard layout.
  94  *
  95  *  See ::SDL_Keycode for details.
  96  *
  97  *  \sa SDL_GetKeyName()
  98  */
  99 extern DECLSPEC SDL_Keycode SDLCALL SDL_GetKeyFromScancode(SDL_Scancode scancode);
 100
 101 /**
 102  *  \brief Get the scancode corresponding to the given key code according to the
 103  *         current keyboard layout.
 104  *
 105  *  See ::SDL_Scancode for details.
 106  *
 107  *  \sa SDL_GetScancodeName()
 108  */
 109 extern DECLSPEC SDL_Scancode SDLCALL SDL_GetScancodeFromKey(SDL_Keycode key);
 110
 111 /**
 112  *  \brief Get a human-readable name for a scancode.
 113  *
 114  *  \return A pointer to the name for the scancode.
 115  *          If the scancode doesn't have a name, this function returns
 116  *          an empty string ("").
 117  *
 118  *  \sa SDL_Scancode
 119  */
 120 extern DECLSPEC const char *SDLCALL SDL_GetScancodeName(SDL_Scancode scancode);
 121
 122 /**
 123  *  \brief Get a scancode from a human-readable name
 124  *
 125  *  \return scancode, or SDL_SCANCODE_UNKNOWN if the name wasn't recognized
 126  *
 127  *  \sa SDL_Scancode
 128  */
 129 extern DECLSPEC SDL_Scancode SDLCALL SDL_GetScancodeFromName(const char *name);
 130
 131 /**
 132  *  \brief Get a human-readable name for a key.
 133  *
 134  *  \return A pointer to a UTF-8 string that stays valid at least until the next
 135  *          call to this function. If you need it around any longer, you must
 136  *          copy it.  If the key doesn't have a name, this function returns an
 137  *          empty string ("").
 138  *
 139  *  \sa SDL_Key
 140  */
 141 extern DECLSPEC const char *SDLCALL SDL_GetKeyName(SDL_Keycode key);
 142
 143 /**
 144  *  \brief Get a key code from a human-readable name
 145  *
 146  *  \return key code, or SDLK_UNKNOWN if the name wasn't recognized
 147  *
 148  *  \sa SDL_Keycode
 149  */
 150 extern DECLSPEC SDL_Keycode SDLCALL SDL_GetKeyFromName(const char *name);
 151
 152 /**
 153  *  \brief Start accepting Unicode text input events.
 154  *         This function will show the on-screen keyboard if supported.
 155  *
 156  *  \sa SDL_StopTextInput()
 157  *  \sa SDL_SetTextInputRect()
 158  *  \sa SDL_HasScreenKeyboardSupport()
 159  */
 160 extern DECLSPEC void SDLCALL SDL_StartTextInput(void);
 161
 162 /**
 163  *  \brief Return whether or not Unicode text input events are enabled.
 164  *
 165  *  \sa SDL_StartTextInput()
 166  *  \sa SDL_StopTextInput()
 167  */
 168 extern DECLSPEC SDL_bool SDLCALL SDL_IsTextInputActive(void);
 169
 170 /**
 171  *  \brief Stop receiving any text input events.
 172  *         This function will hide the on-screen keyboard if supported.
 173  *
 174  *  \sa SDL_StartTextInput()
 175  *  \sa SDL_HasScreenKeyboardSupport()
 176  */
 177 extern DECLSPEC void SDLCALL SDL_StopTextInput(void);
 178
 179 /**
 180  *  \brief Set the rectangle used to type Unicode text inputs.
 181  *         This is used as a hint for IME and on-screen keyboard placement.
 182  *
 183  *  \sa SDL_StartTextInput()
 184  */
 185 extern DECLSPEC void SDLCALL SDL_SetTextInputRect(SDL_Rect *rect);
 186
 187 /**
 188  *  \brief Returns whether the platform has some screen keyboard support.
 189  *
 190  *  \return SDL_TRUE if some keyboard support is available else SDL_FALSE.
 191  *
 192  *  \note Not all screen keyboard functions are supported on all platforms.
 193  *
 194  *  \sa SDL_IsScreenKeyboardShown()
 195  */
 196 extern DECLSPEC SDL_bool SDLCALL SDL_HasScreenKeyboardSupport(void);
 197
 198 /**
 199  *  \brief Returns whether the screen keyboard is shown for given window.
 200  *
 201  *  \param window The window for which screen keyboard should be queried.
 202  *
 203  *  \return SDL_TRUE if screen keyboard is shown else SDL_FALSE.
 204  *
 205  *  \sa SDL_HasScreenKeyboardSupport()
 206  */
 207 extern DECLSPEC SDL_bool SDLCALL SDL_IsScreenKeyboardShown(SDL_Window *window);
 208
 209 /* Ends C function definitions when using C++ */
 210 #ifdef __cplusplus
 211 }
 212 #endif
 213 #include "close_code.h"
 214
 215 #endif /* _SDL_keyboard_h */
 216
 217 /* vi: set ts=4 sw=4 expandtab: */