SDL  2.0
SDL_keyboard.h File Reference
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_keycode.h"
#include "SDL_video.h"
#include "begin_code.h"
#include "close_code.h"
+ Include dependency graph for SDL_keyboard.h:
+ This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures

struct  SDL_Keysym
 The SDL keysym structure, used in key events. More...
 

Functions

SDL_WindowSDL_GetKeyboardFocus (void)
 Get the window which currently has keyboard focus. More...
 
const Uint8SDL_GetKeyboardState (int *numkeys)
 Get a snapshot of the current state of the keyboard. More...
 
SDL_Keymod SDL_GetModState (void)
 Get the current key modifier state for the keyboard. More...
 
void SDL_SetModState (SDL_Keymod modstate)
 Set the current key modifier state for the keyboard. More...
 
SDL_Keycode SDL_GetKeyFromScancode (SDL_Scancode scancode)
 Get the key code corresponding to the given scancode according to the current keyboard layout. More...
 
SDL_Scancode SDL_GetScancodeFromKey (SDL_Keycode key)
 Get the scancode corresponding to the given key code according to the current keyboard layout. More...
 
const char * SDL_GetScancodeName (SDL_Scancode scancode)
 Get a human-readable name for a scancode. More...
 
SDL_Scancode SDL_GetScancodeFromName (const char *name)
 Get a scancode from a human-readable name. More...
 
const char * SDL_GetKeyName (SDL_Keycode key)
 Get a human-readable name for a key. More...
 
SDL_Keycode SDL_GetKeyFromName (const char *name)
 Get a key code from a human-readable name. More...
 
void SDL_StartTextInput (void)
 Start accepting Unicode text input events. This function will show the on-screen keyboard if supported. More...
 
SDL_bool SDL_IsTextInputActive (void)
 Return whether or not Unicode text input events are enabled. More...
 
void SDL_StopTextInput (void)
 Stop receiving any text input events. This function will hide the on-screen keyboard if supported. More...
 
void SDL_SetTextInputRect (SDL_Rect *rect)
 Set the rectangle used to type Unicode text inputs. This is used as a hint for IME and on-screen keyboard placement. More...
 
SDL_bool SDL_HasScreenKeyboardSupport (void)
 Returns whether the platform has some screen keyboard support. More...
 
SDL_bool SDL_IsScreenKeyboardShown (SDL_Window *window)
 Returns whether the screen keyboard is shown for given window. More...
 

Detailed Description

Include file for SDL keyboard event handling

Definition in file SDL_keyboard.h.

Function Documentation

◆ SDL_GetKeyboardFocus()

SDL_Window* SDL_GetKeyboardFocus ( void  )

Get the window which currently has keyboard focus.

Definition at line 247 of file SDL_dynapi_procs.h.

References SDL_Keyboard::focus, and SDL_keyboard.

◆ SDL_GetKeyboardState()

const Uint8* SDL_GetKeyboardState ( int *  numkeys)

Get a snapshot of the current state of the keyboard.

Parameters
numkeysif non-NULL, receives the length of the returned array.
Returns
An array of key states. Indexes into this array are obtained by using SDL_Scancode values.

Example:

printf("<RETURN> is pressed.\n");
}

Definition at line 837 of file SDL_keyboard.c.

838 {
839  SDL_Keyboard *keyboard = &SDL_keyboard;
840 
841  if (numkeys != (int *) 0) {
842  *numkeys = SDL_NUM_SCANCODES;
843  }
844  return keyboard->keystate;
845 }

References SDL_Keyboard::keystate, SDL_keyboard, and SDL_NUM_SCANCODES.

◆ SDL_GetKeyFromName()

SDL_Keycode SDL_GetKeyFromName ( const char *  name)

Get a key code from a human-readable name.

Returns
key code, or SDLK_UNKNOWN if the name wasn't recognized
See also
SDL_Keycode

Definition at line 982 of file SDL_keyboard.c.

983 {
985 
986  /* Check input */
987  if (name == NULL) {
988  return SDLK_UNKNOWN;
989  }
990 
991  /* If it's a single UTF-8 character, then that's the keycode itself */
992  key = *(const unsigned char *)name;
993  if (key >= 0xF0) {
994  if (SDL_strlen(name) == 4) {
995  int i = 0;
996  key = (Uint16)(name[i]&0x07) << 18;
997  key |= (Uint16)(name[++i]&0x3F) << 12;
998  key |= (Uint16)(name[++i]&0x3F) << 6;
999  key |= (Uint16)(name[++i]&0x3F);
1000  return key;
1001  }
1002  return SDLK_UNKNOWN;
1003  } else if (key >= 0xE0) {
1004  if (SDL_strlen(name) == 3) {
1005  int i = 0;
1006  key = (Uint16)(name[i]&0x0F) << 12;
1007  key |= (Uint16)(name[++i]&0x3F) << 6;
1008  key |= (Uint16)(name[++i]&0x3F);
1009  return key;
1010  }
1011  return SDLK_UNKNOWN;
1012  } else if (key >= 0xC0) {
1013  if (SDL_strlen(name) == 2) {
1014  int i = 0;
1015  key = (Uint16)(name[i]&0x1F) << 6;
1016  key |= (Uint16)(name[++i]&0x3F);
1017  return key;
1018  }
1019  return SDLK_UNKNOWN;
1020  } else {
1021  if (SDL_strlen(name) == 1) {
1022  if (key >= 'A' && key <= 'Z') {
1023  key += 32;
1024  }
1025  return key;
1026  }
1027 
1028  /* Get the scancode for this name, and the associated keycode */
1030  }
1031 }

References i, NULL, SDL_default_keymap, SDL_GetScancodeFromName(), SDL_strlen, and SDLK_UNKNOWN.

◆ SDL_GetKeyFromScancode()

SDL_Keycode SDL_GetKeyFromScancode ( SDL_Scancode  scancode)

Get the key code corresponding to the given scancode according to the current keyboard layout.

See SDL_Keycode for details.

See also
SDL_GetKeyName()

Definition at line 877 of file SDL_keyboard.c.

878 {
879  SDL_Keyboard *keyboard = &SDL_keyboard;
880 
881  if (((int)scancode) < ((int)SDL_SCANCODE_UNKNOWN) || scancode >= SDL_NUM_SCANCODES) {
882  SDL_InvalidParamError("scancode");
883  return 0;
884  }
885 
886  return keyboard->keymap[scancode];
887 }

References SDL_Keyboard::keymap, SDL_InvalidParamError, SDL_keyboard, SDL_NUM_SCANCODES, and SDL_SCANCODE_UNKNOWN.

◆ SDL_GetKeyName()

const char* SDL_GetKeyName ( SDL_Keycode  key)

Get a human-readable name for a key.

Returns
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 an empty string ("").
See also
SDL_Keycode

Definition at line 943 of file SDL_keyboard.c.

944 {
945  static char name[8];
946  char *end;
947 
948  if (key & SDLK_SCANCODE_MASK) {
949  return
951  }
952 
953  switch (key) {
954  case SDLK_RETURN:
956  case SDLK_ESCAPE:
958  case SDLK_BACKSPACE:
960  case SDLK_TAB:
962  case SDLK_SPACE:
964  case SDLK_DELETE:
966  default:
967  /* Unaccented letter keys on latin keyboards are normally
968  labeled in upper case (and probably on others like Greek or
969  Cyrillic too, so if you happen to know for sure, please
970  adapt this). */
971  if (key >= 'a' && key <= 'z') {
972  key -= 32;
973  }
974 
976  *end = '\0';
977  return name;
978  }
979 }

References SDL_GetScancodeName(), SDL_SCANCODE_BACKSPACE, SDL_SCANCODE_DELETE, SDL_SCANCODE_ESCAPE, SDL_SCANCODE_RETURN, SDL_SCANCODE_SPACE, SDL_SCANCODE_TAB, SDL_UCS4ToUTF8(), SDLK_BACKSPACE, SDLK_DELETE, SDLK_ESCAPE, SDLK_RETURN, SDLK_SCANCODE_MASK, SDLK_SPACE, and SDLK_TAB.

◆ SDL_GetModState()

SDL_Keymod SDL_GetModState ( void  )

Get the current key modifier state for the keyboard.

Definition at line 249 of file SDL_dynapi_procs.h.

References SDL_Keyboard::modstate, and SDL_keyboard.

◆ SDL_GetScancodeFromKey()

SDL_Scancode SDL_GetScancodeFromKey ( SDL_Keycode  key)

Get the scancode corresponding to the given key code according to the current keyboard layout.

See SDL_Scancode for details.

See also
SDL_GetScancodeName()

Definition at line 890 of file SDL_keyboard.c.

891 {
892  SDL_Keyboard *keyboard = &SDL_keyboard;
893  SDL_Scancode scancode;
894 
895  for (scancode = SDL_SCANCODE_UNKNOWN; scancode < SDL_NUM_SCANCODES;
896  ++scancode) {
897  if (keyboard->keymap[scancode] == key) {
898  return scancode;
899  }
900  }
901  return SDL_SCANCODE_UNKNOWN;
902 }

References SDL_Keyboard::keymap, SDL_keyboard, SDL_NUM_SCANCODES, and SDL_SCANCODE_UNKNOWN.

◆ SDL_GetScancodeFromName()

SDL_Scancode SDL_GetScancodeFromName ( const char *  name)

Get a scancode from a human-readable name.

Returns
scancode, or SDL_SCANCODE_UNKNOWN if the name wasn't recognized
See also
SDL_Scancode

Definition at line 920 of file SDL_keyboard.c.

921 {
922  int i;
923 
924  if (!name || !*name) {
925  SDL_InvalidParamError("name");
926  return SDL_SCANCODE_UNKNOWN;
927  }
928 
929  for (i = 0; i < SDL_arraysize(SDL_scancode_names); ++i) {
930  if (!SDL_scancode_names[i]) {
931  continue;
932  }
933  if (SDL_strcasecmp(name, SDL_scancode_names[i]) == 0) {
934  return (SDL_Scancode)i;
935  }
936  }
937 
938  SDL_InvalidParamError("name");
939  return SDL_SCANCODE_UNKNOWN;
940 }

References i, SDL_arraysize, SDL_InvalidParamError, SDL_scancode_names, SDL_SCANCODE_UNKNOWN, and SDL_strcasecmp.

Referenced by SDL_GetKeyFromName().

◆ SDL_GetScancodeName()

const char* SDL_GetScancodeName ( SDL_Scancode  scancode)

Get a human-readable name for a scancode.

Returns
A pointer to the name for the scancode. If the scancode doesn't have a name, this function returns an empty string ("").
See also
SDL_Scancode

Definition at line 905 of file SDL_keyboard.c.

906 {
907  const char *name;
908  if (((int)scancode) < ((int)SDL_SCANCODE_UNKNOWN) || scancode >= SDL_NUM_SCANCODES) {
909  SDL_InvalidParamError("scancode");
910  return "";
911  }
912 
913  name = SDL_scancode_names[scancode];
914  if (name)
915  return name;
916  else
917  return "";
918 }

References SDL_InvalidParamError, SDL_NUM_SCANCODES, SDL_scancode_names, and SDL_SCANCODE_UNKNOWN.

Referenced by SDL_GetKeyName(), and SDL_SendKeyboardKey().

◆ SDL_HasScreenKeyboardSupport()

SDL_bool SDL_HasScreenKeyboardSupport ( void  )

Returns whether the platform has some screen keyboard support.

Returns
SDL_TRUE if some keyboard support is available else SDL_FALSE.
Note
Not all screen keyboard functions are supported on all platforms.
See also
SDL_IsScreenKeyboardShown()

Definition at line 261 of file SDL_dynapi_procs.h.

References _this, SDL_VideoDevice::HasScreenKeyboardSupport, and SDL_FALSE.

Referenced by SDL_VideoInit().

◆ SDL_IsScreenKeyboardShown()

SDL_bool SDL_IsScreenKeyboardShown ( SDL_Window window)

Returns whether the screen keyboard is shown for given window.

Parameters
windowThe window for which screen keyboard should be queried.
Returns
SDL_TRUE if screen keyboard is shown else SDL_FALSE.
See also
SDL_HasScreenKeyboardSupport()

Definition at line 3823 of file SDL_video.c.

3824 {
3825  if (window && _this && _this->IsScreenKeyboardShown) {
3827  }
3828  return SDL_FALSE;
3829 }

References _this, SDL_VideoDevice::IsScreenKeyboardShown, and SDL_FALSE.

◆ SDL_IsTextInputActive()

SDL_bool SDL_IsTextInputActive ( void  )

Return whether or not Unicode text input events are enabled.

See also
SDL_StartTextInput()
SDL_StopTextInput()

Definition at line 3779 of file SDL_video.c.

3780 {
3782 }

References SDL_ENABLE, SDL_GetEventState, and SDL_TEXTINPUT.

◆ SDL_SetModState()

void SDL_SetModState ( SDL_Keymod  modstate)

Set the current key modifier state for the keyboard.

Note
This does not change the keyboard state, only the key modifier flags.

Definition at line 856 of file SDL_keyboard.c.

857 {
858  SDL_Keyboard *keyboard = &SDL_keyboard;
859 
860  keyboard->modstate = modstate;
861 }

References SDL_Keyboard::modstate, and SDL_keyboard.

◆ SDL_SetTextInputRect()

void SDL_SetTextInputRect ( SDL_Rect rect)

Set the rectangle used to type Unicode text inputs. This is used as a hint for IME and on-screen keyboard placement.

See also
SDL_StartTextInput()

Definition at line 3806 of file SDL_video.c.

3807 {
3808  if (_this && _this->SetTextInputRect) {
3810  }
3811 }

References _this, rect, and SDL_VideoDevice::SetTextInputRect.

◆ SDL_StartTextInput()

void SDL_StartTextInput ( void  )

Start accepting Unicode text input events. This function will show the on-screen keyboard if supported.

See also
SDL_StopTextInput()
SDL_SetTextInputRect()
SDL_HasScreenKeyboardSupport()

Definition at line 257 of file SDL_dynapi_procs.h.

References _this, SDL_ENABLE, SDL_EventState, SDL_GetFocusWindow(), SDL_TEXTEDITING, SDL_TEXTINPUT, SDL_VideoDevice::ShowScreenKeyboard, and SDL_VideoDevice::StartTextInput.

Referenced by SDL_VideoInit().

◆ SDL_StopTextInput()

void SDL_StopTextInput ( void  )

Stop receiving any text input events. This function will hide the on-screen keyboard if supported.

See also
SDL_StartTextInput()
SDL_HasScreenKeyboardSupport()

Definition at line 259 of file SDL_dynapi_procs.h.

References _this, SDL_VideoDevice::HideScreenKeyboard, SDL_DISABLE, SDL_EventState, SDL_GetFocusWindow(), SDL_TEXTEDITING, SDL_TEXTINPUT, and SDL_VideoDevice::StopTextInput.

Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDL_Keyboard::modstate
Uint16 modstate
Definition: SDL_keyboard.c:42
SDLK_UNKNOWN
@ SDLK_UNKNOWN
Definition: SDL_keycode.h:52
SDL_scancode_names
static const char * SDL_scancode_names[SDL_NUM_SCANCODES]
Definition: SDL_keyboard.c:282
end
GLuint GLuint end
Definition: SDL_opengl.h:1571
NULL
#define NULL
Definition: begin_code.h:167
SDL_Keyboard::keystate
Uint8 keystate[SDL_NUM_SCANCODES]
Definition: SDL_keyboard.c:43
SDL_VideoDevice::SetTextInputRect
void(* SetTextInputRect)(_THIS, SDL_Rect *rect)
Definition: SDL_sysvideo.h:289
SDL_UCS4ToUTF8
char * SDL_UCS4ToUTF8(Uint32 ch, char *dst)
Definition: SDL_keyboard.c:520
SDL_Scancode
SDL_Scancode
The SDL keyboard scancode representation.
Definition: SDL_scancode.h:43
SDL_InvalidParamError
#define SDL_InvalidParamError(param)
Definition: SDL_error.h:54
SDL_SCANCODE_TAB
@ SDL_SCANCODE_TAB
Definition: SDL_scancode.h:95
SDL_ENABLE
#define SDL_ENABLE
Definition: SDL_events.h:759
SDL_Keycode
Sint32 SDL_Keycode
The SDL virtual key representation.
Definition: SDL_keycode.h:45
SDL_strcasecmp
#define SDL_strcasecmp
Definition: SDL_dynapi_overrides.h:419
SDLK_ESCAPE
@ SDLK_ESCAPE
Definition: SDL_keycode.h:55
SDL_FALSE
@ SDL_FALSE
Definition: SDL_stdinc.h:163
SDL_Keyboard
Definition: SDL_keyboard.c:38
_this
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
SDL_SCANCODE_SPACE
@ SDL_SCANCODE_SPACE
Definition: SDL_scancode.h:96
SDL_GetEventState
#define SDL_GetEventState(type)
Definition: SDL_events.h:772
window
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
SDL_TEXTINPUT
@ SDL_TEXTINPUT
Definition: SDL_events.h:99
SDL_default_keymap
static const SDL_Keycode SDL_default_keymap[SDL_NUM_SCANCODES]
Definition: SDL_keyboard.c:49
SDL_Keyboard::keymap
SDL_Keycode keymap[SDL_NUM_SCANCODES]
Definition: SDL_keyboard.c:44
SDL_GetKeyboardState
#define SDL_GetKeyboardState
Definition: SDL_dynapi_overrides.h:217
name
GLuint const GLchar * name
Definition: SDL_opengl_glext.h:660
SDLK_SPACE
@ SDLK_SPACE
Definition: SDL_keycode.h:58
rect
SDL_Rect rect
Definition: testrelative.c:27
SDL_SCANCODE_ESCAPE
@ SDL_SCANCODE_ESCAPE
Definition: SDL_scancode.h:93
Uint16
uint16_t Uint16
Definition: SDL_stdinc.h:191
key
GLuint64 key
Definition: gl2ext.h:2192
SDL_SCANCODE_BACKSPACE
@ SDL_SCANCODE_BACKSPACE
Definition: SDL_scancode.h:94
SDL_GetScancodeName
const char * SDL_GetScancodeName(SDL_Scancode scancode)
Get a human-readable name for a scancode.
Definition: SDL_keyboard.c:905
SDLK_BACKSPACE
@ SDLK_BACKSPACE
Definition: SDL_keycode.h:56
SDL_VideoDevice::IsScreenKeyboardShown
SDL_bool(* IsScreenKeyboardShown)(_THIS, SDL_Window *window)
Definition: SDL_sysvideo.h:295
SDLK_SCANCODE_MASK
#define SDLK_SCANCODE_MASK
Definition: SDL_keycode.h:47
SDL_SCANCODE_UNKNOWN
@ SDL_SCANCODE_UNKNOWN
Definition: SDL_scancode.h:45
SDLK_DELETE
@ SDLK_DELETE
Definition: SDL_keycode.h:148
SDL_arraysize
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:115
SDL_SCANCODE_DELETE
@ SDL_SCANCODE_DELETE
Definition: SDL_scancode.h:173
SDLK_RETURN
@ SDLK_RETURN
Definition: SDL_keycode.h:54
SDLK_TAB
@ SDLK_TAB
Definition: SDL_keycode.h:57
SDL_strlen
#define SDL_strlen
Definition: SDL_dynapi_overrides.h:393
SDL_NUM_SCANCODES
@ SDL_NUM_SCANCODES
Definition: SDL_scancode.h:407
state
struct xkb_state * state
Definition: SDL_waylandsym.h:113
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
SDL_GetScancodeFromName
SDL_Scancode SDL_GetScancodeFromName(const char *name)
Get a scancode from a human-readable name.
Definition: SDL_keyboard.c:920
SDL_SCANCODE_RETURN
@ SDL_SCANCODE_RETURN
Definition: SDL_scancode.h:92
SDL_keyboard
static SDL_Keyboard SDL_keyboard
Definition: SDL_keyboard.c:47
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:179