SDL 3.0
SDL_keyboard.h File Reference
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Typedefs

typedef Uint32 SDL_KeyboardID
 

Functions

SDL_bool SDL_HasKeyboard (void)
 
SDL_KeyboardIDSDL_GetKeyboards (int *count)
 
const char * SDL_GetKeyboardNameForID (SDL_KeyboardID instance_id)
 
SDL_WindowSDL_GetKeyboardFocus (void)
 
const Uint8SDL_GetKeyboardState (int *numkeys)
 
void SDL_ResetKeyboard (void)
 
SDL_Keymod SDL_GetModState (void)
 
void SDL_SetModState (SDL_Keymod modstate)
 
SDL_Keycode SDL_GetDefaultKeyFromScancode (SDL_Scancode scancode, SDL_Keymod modstate)
 
SDL_Keycode SDL_GetKeyFromScancode (SDL_Scancode scancode, SDL_Keymod modstate)
 
SDL_Scancode SDL_GetDefaultScancodeFromKey (SDL_Keycode key, SDL_Keymod *modstate)
 
SDL_Scancode SDL_GetScancodeFromKey (SDL_Keycode key, SDL_Keymod *modstate)
 
int SDL_SetScancodeName (SDL_Scancode scancode, const char *name)
 
const char * SDL_GetScancodeName (SDL_Scancode scancode)
 
SDL_Scancode SDL_GetScancodeFromName (const char *name)
 
const char * SDL_GetKeyName (SDL_Keycode key)
 
SDL_Keycode SDL_GetKeyFromName (const char *name)
 
int SDL_StartTextInput (SDL_Window *window)
 
SDL_bool SDL_TextInputActive (SDL_Window *window)
 
int SDL_StopTextInput (SDL_Window *window)
 
int SDL_ClearComposition (SDL_Window *window)
 
int SDL_SetTextInputArea (SDL_Window *window, const SDL_Rect *rect, int cursor)
 
int SDL_GetTextInputArea (SDL_Window *window, SDL_Rect *rect, int *cursor)
 
SDL_bool SDL_HasScreenKeyboardSupport (void)
 
SDL_bool SDL_ScreenKeyboardShown (SDL_Window *window)
 

Typedef Documentation

◆ SDL_KeyboardID

CategoryKeyboard

SDL keyboard management. This is a unique ID for a keyboard for the time it is connected to the system, and is never reused for the lifetime of the application.

If the keyboard is disconnected and reconnected, it will get a new ID.

The ID value starts at 1 and increments from there. The value 0 is an invalid ID.

Since
This datatype is available since SDL 3.0.0.

Definition at line 53 of file SDL_keyboard.h.

Function Documentation

◆ SDL_ClearComposition()

int SDL_ClearComposition ( SDL_Window window)
extern

Dismiss the composition window/IME without disabling the subsystem.

Parameters
windowthe window to affect.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_StartTextInput
SDL_StopTextInput

◆ SDL_GetDefaultKeyFromScancode()

SDL_Keycode SDL_GetDefaultKeyFromScancode ( SDL_Scancode  scancode,
SDL_Keymod  modstate 
)
extern

Get the key code corresponding to the given scancode according to a default en_US keyboard layout.

See SDL_Keycode for details.

Parameters
scancodethe desired SDL_Scancode to query.
modstatethe modifier state to use when translating the scancode to a keycode.
Returns
the SDL_Keycode that corresponds to the given SDL_Scancode.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyName
SDL_GetScancodeFromKey

◆ SDL_GetDefaultScancodeFromKey()

SDL_Scancode SDL_GetDefaultScancodeFromKey ( SDL_Keycode  key,
SDL_Keymod modstate 
)
extern

Get the scancode corresponding to the given key code according to a default en_US keyboard layout.

Note that there may be multiple scancode+modifier states that can generate this keycode, this will just return the first one found.

Parameters
keythe desired SDL_Keycode to query.
modstatea pointer to the modifier state that would be used when the scancode generates this key, may be NULL.
Returns
the SDL_Scancode that corresponds to the given SDL_Keycode.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetScancodeFromKey
SDL_GetScancodeName

◆ SDL_GetKeyboardFocus()

SDL_Window * SDL_GetKeyboardFocus ( void  )
extern

Query the window which currently has keyboard focus.

Returns
the window with keyboard focus.
Since
This function is available since SDL 3.0.0.

◆ SDL_GetKeyboardNameForID()

const char * SDL_GetKeyboardNameForID ( SDL_KeyboardID  instance_id)
extern

Get the name of a keyboard.

This function returns "" if the keyboard doesn't have a name.

Parameters
instance_idthe keyboard instance ID.
Returns
the name of the selected keyboard or NULL on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyboards

◆ SDL_GetKeyboards()

SDL_KeyboardID * SDL_GetKeyboards ( int *  count)
extern

Get a list of currently connected keyboards.

Note that this will include any device or virtual driver that includes keyboard functionality, including some mice, KVM switches, motherboard power buttons, etc. You should wait for input from a device before you consider it actively in use.

Parameters
counta pointer filled in with the number of keyboards returned, may be NULL.
Returns
a 0 terminated array of keyboards instance IDs or NULL on failure; call SDL_GetError() for more information. This should be freed with SDL_free() when it is no longer needed.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyboardNameForID
SDL_HasKeyboard

◆ SDL_GetKeyboardState()

const Uint8 * SDL_GetKeyboardState ( int *  numkeys)
extern

Get a snapshot of the current state of the keyboard.

The pointer returned is a pointer to an internal SDL array. It will be valid for the whole lifetime of the application and should not be freed by the caller.

A array element with a value of 1 means that the key is pressed and a value of 0 means that it is not. Indexes into this array are obtained by using SDL_Scancode values.

Use SDL_PumpEvents() to update the state array.

This function gives you the current state after all events have been processed, so if a key or button has been pressed and released before you process events, then the pressed state will never show up in the SDL_GetKeyboardState() calls.

Note: This function doesn't take into account whether shift has been pressed or not.

Parameters
numkeysif non-NULL, receives the length of the returned array.
Returns
a pointer to an array of key states.
Since
This function is available since SDL 3.0.0.
See also
SDL_PumpEvents
SDL_ResetKeyboard

◆ SDL_GetKeyFromName()

SDL_Keycode SDL_GetKeyFromName ( const char *  name)
extern

Get a key code from a human-readable name.

Parameters
namethe human-readable key name.
Returns
key code, or SDLK_UNKNOWN if the name wasn't recognized; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyFromScancode
SDL_GetKeyName
SDL_GetScancodeFromName

◆ SDL_GetKeyFromScancode()

SDL_Keycode SDL_GetKeyFromScancode ( SDL_Scancode  scancode,
SDL_Keymod  modstate 
)
extern

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

See SDL_Keycode for details.

Parameters
scancodethe desired SDL_Scancode to query.
modstatethe modifier state to use when translating the scancode to a keycode.
Returns
the SDL_Keycode that corresponds to the given SDL_Scancode.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetDefaultKeyFromScancode
SDL_GetKeyName
SDL_GetScancodeFromKey

◆ SDL_GetKeyName()

const char * SDL_GetKeyName ( SDL_Keycode  key)
extern

Get a human-readable name for a key.

Both lowercase and uppercase alphabetic keycodes have uppercase names, e.g. SDL_Keycode 'a' and 'A' both have the name "A".

If the key doesn't have a name, this function returns an empty string ("").

Parameters
keythe desired SDL_Keycode to query.
Returns
a UTF-8 encoded string of the key name.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyFromName
SDL_GetKeyFromScancode
SDL_GetScancodeFromKey

◆ SDL_GetModState()

SDL_Keymod SDL_GetModState ( void  )
extern

Get the current key modifier state for the keyboard.

Returns
an OR'd combination of the modifier keys for the keyboard. See SDL_Keymod for details.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyboardState
SDL_SetModState

◆ SDL_GetScancodeFromKey()

SDL_Scancode SDL_GetScancodeFromKey ( SDL_Keycode  key,
SDL_Keymod modstate 
)
extern

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

Note that there may be multiple scancode+modifier states that can generate this keycode, this will just return the first one found.

Parameters
keythe desired SDL_Keycode to query.
modstatea pointer to the modifier state that would be used when the scancode generates this key, may be NULL.
Returns
the SDL_Scancode that corresponds to the given SDL_Keycode.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetDefaultScancodeFromKey
SDL_GetKeyFromScancode
SDL_GetScancodeName

◆ SDL_GetScancodeFromName()

SDL_Scancode SDL_GetScancodeFromName ( const char *  name)
extern

Get a scancode from a human-readable name.

Parameters
namethe human-readable scancode name.
Returns
the SDL_Scancode, or SDL_SCANCODE_UNKNOWN if the name wasn't recognized; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyFromName
SDL_GetScancodeFromKey
SDL_GetScancodeName

◆ SDL_GetScancodeName()

const char * SDL_GetScancodeName ( SDL_Scancode  scancode)
extern

Get a human-readable name for a scancode.

Warning: The returned name is by design not stable across platforms, e.g. the name for SDL_SCANCODE_LGUI is "Left GUI" under Linux but "Left Windows" under Microsoft Windows, and some scancodes like SDL_SCANCODE_NONUSBACKSLASH don't have any name at all. There are even scancodes that share names, e.g. SDL_SCANCODE_RETURN and SDL_SCANCODE_RETURN2 (both called "Return"). This function is therefore unsuitable for creating a stable cross-platform two-way mapping between strings and scancodes.

Parameters
scancodethe desired SDL_Scancode to query.
Returns
a pointer to the name for the scancode. If the scancode doesn't have a name this function returns an empty string ("").
Since
This function is available since SDL 3.0.0.
See also
SDL_GetScancodeFromKey
SDL_GetScancodeFromName
SDL_SetScancodeName

◆ SDL_GetTextInputArea()

int SDL_GetTextInputArea ( SDL_Window window,
SDL_Rect rect,
int *  cursor 
)
extern

Get the area used to type Unicode text input.

This returns the values previously set by SDL_SetTextInputArea().

Parameters
windowthe window for which to query the text input area.
recta pointer to an SDL_Rect filled in with the text input area, may be NULL.
cursora pointer to the offset of the current cursor location relative to rect->x, may be NULL.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_SetTextInputArea

◆ SDL_HasKeyboard()

SDL_bool SDL_HasKeyboard ( void  )
extern

Return whether a keyboard is currently connected.

Returns
SDL_TRUE if a keyboard is connected, SDL_FALSE otherwise.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyboards

◆ SDL_HasScreenKeyboardSupport()

SDL_bool SDL_HasScreenKeyboardSupport ( void  )
extern

Check whether the platform has screen keyboard support.

Returns
SDL_TRUE if the platform has some screen keyboard support or SDL_FALSE if not.
Since
This function is available since SDL 3.0.0.
See also
SDL_StartTextInput
SDL_ScreenKeyboardShown

◆ SDL_ResetKeyboard()

void SDL_ResetKeyboard ( void  )
extern

Clear the state of the keyboard.

This function will generate key up events for all pressed keys.

Since
This function is available since SDL 3.0.0.
See also
SDL_GetKeyboardState

◆ SDL_ScreenKeyboardShown()

SDL_bool SDL_ScreenKeyboardShown ( SDL_Window window)
extern

Check 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 or SDL_FALSE if not.
Since
This function is available since SDL 3.0.0.
See also
SDL_HasScreenKeyboardSupport

◆ SDL_SetModState()

void SDL_SetModState ( SDL_Keymod  modstate)
extern

Set the current key modifier state for the keyboard.

The inverse of SDL_GetModState(), SDL_SetModState() allows you to impose modifier key states on your application. Simply pass your desired modifier states into modstate. This value may be a bitwise, OR'd combination of SDL_Keymod values.

This does not change the keyboard state, only the key modifier flags that SDL reports.

Parameters
modstatethe desired SDL_Keymod for the keyboard.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetModState

◆ SDL_SetScancodeName()

int SDL_SetScancodeName ( SDL_Scancode  scancode,
const char *  name 
)
extern

Set a human-readable name for a scancode.

Parameters
scancodethe desired SDL_Scancode.
namethe name to use for the scancode, encoded as UTF-8. The string is not copied, so the pointer given to this function must stay valid while SDL is being used.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetScancodeName

◆ SDL_SetTextInputArea()

int SDL_SetTextInputArea ( SDL_Window window,
const SDL_Rect rect,
int  cursor 
)
extern

Set the area used to type Unicode text input.

Native input methods may place a window with word suggestions near the cursor, without covering the text being entered.

Parameters
windowthe window for which to set the text input area.
rectthe SDL_Rect representing the text input area, in window coordinates, or NULL to clear it.
cursorthe offset of the current cursor location relative to rect->x, in window coordinates.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_GetTextInputArea
SDL_StartTextInput

◆ SDL_StartTextInput()

int SDL_StartTextInput ( SDL_Window window)
extern

Start accepting Unicode text input events in a window.

This function will enable text input (SDL_EVENT_TEXT_INPUT and SDL_EVENT_TEXT_EDITING events) in the specified window. Please use this function paired with SDL_StopTextInput().

Text input events are not received by default.

On some platforms using this function shows the screen keyboard.

Parameters
windowthe window to enable text input.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_SetTextInputArea
SDL_StopTextInput
SDL_TextInputActive

◆ SDL_StopTextInput()

int SDL_StopTextInput ( SDL_Window window)
extern

Stop receiving any text input events in a window.

If SDL_StartTextInput() showed the screen keyboard, this function will hide it.

Parameters
windowthe window to disable text input.
Returns
0 on success or a negative error code on failure; call SDL_GetError() for more information.
Since
This function is available since SDL 3.0.0.
See also
SDL_StartTextInput

◆ SDL_TextInputActive()

SDL_bool SDL_TextInputActive ( SDL_Window window)
extern

Check whether or not Unicode text input events are enabled for a window.

Parameters
windowthe window to check.
Returns
SDL_TRUE if text input events are enabled else SDL_FALSE.
Since
This function is available since SDL 3.0.0.
See also
SDL_StartTextInput