Description

This is the reference documentation for input related functions and types. For more task-oriented information, see the Input guide.

Modules
	Joysticks

	Keyboard keys

	Modifier key flags

	Mouse buttons

	Standard cursor shapes

Typedefs
typedef void(*	GLFWmousebuttonfun) (GLFWwindow *, int, int, int)
	The function signature for mouse button callbacks. More...

typedef void(*	GLFWcursorposfun) (GLFWwindow *, double, double)
	The function signature for cursor position callbacks. More...

typedef void(*	GLFWcursorenterfun) (GLFWwindow *, int)
	The function signature for cursor enter/leave callbacks. More...

typedef void(*	GLFWscrollfun) (GLFWwindow *, double, double)
	The function signature for scroll callbacks. More...

typedef void(*	GLFWkeyfun) (GLFWwindow *, int, int, int, int)
	The function signature for keyboard key callbacks. More...

typedef void(*	GLFWcharfun) (GLFWwindow *, unsigned int)
	The function signature for Unicode character callbacks. More...

typedef void(*	GLFWcharmodsfun) (GLFWwindow *, unsigned int, int)
	The function signature for Unicode character with modifiers callbacks. More...

typedef void(*	GLFWdropfun) (GLFWwindow , int, const char *)
	The function signature for file drop callbacks. More...

typedef void(*	GLFWjoystickfun) (int, int)
	The function signature for joystick configuration callbacks. More...

Functions
int	glfwGetInputMode (GLFWwindow *window, int mode)
	Returns the value of an input option for the specified window. More...

void	glfwSetInputMode (GLFWwindow *window, int mode, int value)
	Sets an input option for the specified window. More...

const char *	glfwGetKeyName (int key, int scancode)
	Returns the localized name of the specified printable key. More...

int	glfwGetKey (GLFWwindow *window, int key)
	Returns the last reported state of a keyboard key for the specified window. More...

int	glfwGetMouseButton (GLFWwindow *window, int button)
	Returns the last reported state of a mouse button for the specified window. More...

void	glfwGetCursorPos (GLFWwindow window, double xpos, double *ypos)
	Retrieves the position of the cursor relative to the client area of the window. More...

void	glfwSetCursorPos (GLFWwindow *window, double xpos, double ypos)
	Sets the position of the cursor, relative to the client area of the window. More...

GLFWcursor *	glfwCreateCursor (const GLFWimage *image, int xhot, int yhot)
	Creates a custom cursor. More...

GLFWcursor *	glfwCreateStandardCursor (int shape)
	Creates a cursor with a standard shape. More...

void	glfwDestroyCursor (GLFWcursor *cursor)
	Destroys a cursor. More...

void	glfwSetCursor (GLFWwindow window, GLFWcursor cursor)
	Sets the cursor for the window. More...

GLFWkeyfun	glfwSetKeyCallback (GLFWwindow *window, GLFWkeyfun cbfun)
	Sets the key callback. More...

GLFWcharfun	glfwSetCharCallback (GLFWwindow *window, GLFWcharfun cbfun)
	Sets the Unicode character callback. More...

GLFWcharmodsfun	glfwSetCharModsCallback (GLFWwindow *window, GLFWcharmodsfun cbfun)
	Sets the Unicode character with modifiers callback. More...

GLFWmousebuttonfun	glfwSetMouseButtonCallback (GLFWwindow *window, GLFWmousebuttonfun cbfun)
	Sets the mouse button callback. More...

GLFWcursorposfun	glfwSetCursorPosCallback (GLFWwindow *window, GLFWcursorposfun cbfun)
	Sets the cursor position callback. More...

GLFWcursorenterfun	glfwSetCursorEnterCallback (GLFWwindow *window, GLFWcursorenterfun cbfun)
	Sets the cursor enter/exit callback. More...

GLFWscrollfun	glfwSetScrollCallback (GLFWwindow *window, GLFWscrollfun cbfun)
	Sets the scroll callback. More...

GLFWdropfun	glfwSetDropCallback (GLFWwindow *window, GLFWdropfun cbfun)
	Sets the file drop callback. More...

int	glfwJoystickPresent (int joy)
	Returns whether the specified joystick is present. More...

const float *	glfwGetJoystickAxes (int joy, int *count)
	Returns the values of all axes of the specified joystick. More...

const unsigned char *	glfwGetJoystickButtons (int joy, int *count)
	Returns the state of all buttons of the specified joystick. More...

const char *	glfwGetJoystickName (int joy)
	Returns the name of the specified joystick. More...

GLFWjoystickfun	glfwSetJoystickCallback (GLFWjoystickfun cbfun)
	Sets the joystick configuration callback. More...

void	glfwSetClipboardString (GLFWwindow window, const char string)
	Sets the clipboard to the specified string. More...

const char *	glfwGetClipboardString (GLFWwindow *window)
	Returns the contents of the clipboard as a string. More...

double	glfwGetTime (void)
	Returns the value of the GLFW timer. More...

void	glfwSetTime (double time)
	Sets the GLFW timer. More...

uint64_t	glfwGetTimerValue (void)
	Returns the current value of the raw timer. More...

uint64_t	glfwGetTimerFrequency (void)
	Returns the frequency, in Hz, of the raw timer. More...

Macro Definition Documentation

◆ GLFW_PRESS

#define GLFW_PRESS 1

The key or mouse button was pressed.

◆ GLFW_RELEASE

#define GLFW_RELEASE 0

The key or mouse button was released.

◆ GLFW_REPEAT

#define GLFW_REPEAT 2

The key was held down until it repeated.

Typedef Documentation

◆ GLFWcharfun

typedef void(* GLFWcharfun) (GLFWwindow *, unsigned int)

This is the function signature for Unicode character callback functions.

Parameters

[in]	window	The window that received the event.
[in]	codepoint	The Unicode code point of the character.

See also: Text input; glfwSetCharCallback

Since: Added in version 2.4. GLFW 3: Added window handle parameter.

◆ GLFWcharmodsfun

typedef void(* GLFWcharmodsfun) (GLFWwindow *, unsigned int, int)

This is the function signature for Unicode character with modifiers callback functions. It is called for each input character, regardless of what modifier keys are held down.

Parameters

[in]	window	The window that received the event.
[in]	codepoint	The Unicode code point of the character.
[in]	mods	Bit field describing which modifier keys were held down.

See also: Text input; glfwSetCharModsCallback

Since: Added in version 3.1.

◆ GLFWcursorenterfun

typedef void(* GLFWcursorenterfun) (GLFWwindow *, int)

This is the function signature for cursor enter/leave callback functions.

Parameters

[in]	window	The window that received the event.
[in]	entered	`GLFW_TRUE` if the cursor entered the window's client area, or `GLFW_FALSE` if it left it.

See also: Cursor enter/leave events; glfwSetCursorEnterCallback

Since: Added in version 3.0.

◆ GLFWcursorposfun

typedef void(* GLFWcursorposfun) (GLFWwindow *, double, double)

This is the function signature for cursor position callback functions.

Parameters

[in]	window	The window that received the event.
[in]	xpos	The new cursor x-coordinate, relative to the left edge of the client area.
[in]	ypos	The new cursor y-coordinate, relative to the top edge of the client area.

See also: Cursor position; glfwSetCursorPosCallback

Since: Added in version 3.0. Replaces GLFWmouseposfun.

◆ GLFWdropfun

typedef void(* GLFWdropfun) (GLFWwindow *, int, const char **)

This is the function signature for file drop callbacks.

Parameters

[in]	window	The window that received the event.
[in]	count	The number of dropped files.
[in]	paths	The UTF-8 encoded file and/or directory path names.

See also: Path drop input; glfwSetDropCallback

Since: Added in version 3.1.

◆ GLFWjoystickfun

typedef void(* GLFWjoystickfun) (int, int)

This is the function signature for joystick configuration callback functions.

Parameters

[in]	joy	The joystick that was connected or disconnected.
[in]	event	One of `GLFW_CONNECTED` or `GLFW_DISCONNECTED`.

See also: Joystick configuration changes; glfwSetJoystickCallback

Since: Added in version 3.2.

◆ GLFWkeyfun

typedef void(* GLFWkeyfun) (GLFWwindow *, int, int, int, int)

This is the function signature for keyboard key callback functions.

Parameters

[in]	window	The window that received the event.
[in]	key	The keyboard key that was pressed or released.
[in]	scancode	The system-specific scancode of the key.
[in]	action	`GLFW_PRESS`, `GLFW_RELEASE` or `GLFW_REPEAT`.
[in]	mods	Bit field describing which modifier keys were held down.

See also: Key input; glfwSetKeyCallback

Since: Added in version 1.0. GLFW 3: Added window handle, scancode and modifier mask parameters.

◆ GLFWmousebuttonfun

typedef void(* GLFWmousebuttonfun) (GLFWwindow *, int, int, int)

This is the function signature for mouse button callback functions.

Parameters

[in]	window	The window that received the event.
[in]	button	The mouse button that was pressed or released.
[in]	action	One of `GLFW_PRESS` or `GLFW_RELEASE`.
[in]	mods	Bit field describing which modifier keys were held down.

See also: Mouse button input; glfwSetMouseButtonCallback

Since: Added in version 1.0. GLFW 3: Added window handle and modifier mask parameters.

◆ GLFWscrollfun

typedef void(* GLFWscrollfun) (GLFWwindow *, double, double)

This is the function signature for scroll callback functions.

Parameters

[in]	window	The window that received the event.
[in]	xoffset	The scroll offset along the x-axis.
[in]	yoffset	The scroll offset along the y-axis.

See also: Scroll input; glfwSetScrollCallback

Since: Added in version 3.0. Replaces GLFWmousewheelfun.

Function Documentation

◆ glfwCreateCursor()

GLFWcursor* glfwCreateCursor	(	const GLFWimage *	image,
		int	xhot,
		int	yhot
	)

Creates a new custom cursor image that can be set for a window with glfwSetCursor. The cursor can be destroyed with glfwDestroyCursor. Any remaining cursors are destroyed by glfwTerminate.

The pixels are 32-bit, little-endian, non-premultiplied RGBA, i.e. eight bits per channel. They are arranged canonically as packed sequential rows, starting from the top-left corner.

The cursor hotspot is specified in pixels, relative to the upper-left corner of the cursor image. Like all other coordinate systems in GLFW, the X-axis points to the right and the Y-axis points down.

Parameters

[in]	image	The desired cursor image.
[in]	xhot	The desired x-coordinate, in pixels, of the cursor hotspot.
[in]	yhot	The desired y-coordinate, in pixels, of the cursor hotspot.

Returns: The handle of the created cursor, or NULL if an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Pointer lifetime: The specified image data is copied before this function returns.

Reentrancy: This function must not be called from a callback.

Thread safety: This function must only be called from the main thread.

See also: Cursor objects; glfwDestroyCursor; glfwCreateStandardCursor

Since: Added in version 3.1.

◆ glfwCreateStandardCursor()

GLFWcursor* glfwCreateStandardCursor ( int shape )

Returns a cursor with a standard shape, that can be set for a window with glfwSetCursor.

Parameters

[in] shape One of the standard shapes.

Returns: A new cursor ready to use or NULL if an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED, GLFW_INVALID_ENUM and GLFW_PLATFORM_ERROR.

Reentrancy: This function must not be called from a callback.

Thread safety: This function must only be called from the main thread.

See also: Cursor objects; glfwCreateCursor

Since: Added in version 3.1.

◆ glfwDestroyCursor()

void glfwDestroyCursor ( GLFWcursor * cursor )

This function destroys a cursor previously created with glfwCreateCursor. Any remaining cursors will be destroyed by glfwTerminate.

Parameters

[in] cursor The cursor object to destroy.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Reentrancy: This function must not be called from a callback.

Thread safety: This function must only be called from the main thread.

See also: Cursor objects; glfwCreateCursor

Since: Added in version 3.1.

◆ glfwGetClipboardString()

const char* glfwGetClipboardString ( GLFWwindow * window )

This function returns the contents of the system clipboard, if it contains or is convertible to a UTF-8 encoded string. If the clipboard is empty or if its contents cannot be converted, NULL is returned and a GLFW_FORMAT_UNAVAILABLE error is generated.

Parameters

[in] window The window that will request the clipboard contents.

Returns: The contents of the clipboard as a UTF-8 encoded string, or NULL if an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Pointer lifetime: The returned string is allocated and freed by GLFW. You should not free it yourself. It is valid until the next call to glfwGetClipboardString or glfwSetClipboardString, or until the library is terminated.

Thread safety: This function must only be called from the main thread.

See also: Clipboard input and output; glfwSetClipboardString

Since: Added in version 3.0.

◆ glfwGetCursorPos()

void glfwGetCursorPos	(	GLFWwindow *	window,
		double *	xpos,
		double *	ypos
	)

This function returns the position of the cursor, in screen coordinates, relative to the upper-left corner of the client area of the specified window.

If the cursor is disabled (with GLFW_CURSOR_DISABLED) then the cursor position is unbounded and limited only by the minimum and maximum values of a double.

The coordinate can be converted to their integer equivalents with the floor function. Casting directly to an integer type works for positive coordinates, but fails for negative ones.

Any or all of the position arguments may be NULL. If an error occurs, all non-NULL position arguments will be set to zero.

Parameters

[in]	window	The desired window.
[out]	xpos	Where to store the cursor x-coordinate, relative to the left edge of the client area, or `NULL`.
[out]	ypos	Where to store the cursor y-coordinate, relative to the to top edge of the client area, or `NULL`.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Thread safety: This function must only be called from the main thread.

See also: Cursor position; glfwSetCursorPos

Since: Added in version 3.0. Replaces glfwGetMousePos.

◆ glfwGetInputMode()

int glfwGetInputMode	(	GLFWwindow *	window,
		int	mode
	)

This function returns the value of an input option for the specified window. The mode must be one of GLFW_CURSOR, GLFW_STICKY_KEYS or GLFW_STICKY_MOUSE_BUTTONS.

Parameters

[in]	window	The window to query.
[in]	mode	One of `GLFW_CURSOR`, `GLFW_STICKY_KEYS` or `GLFW_STICKY_MOUSE_BUTTONS`.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_INVALID_ENUM.

Thread safety: This function must only be called from the main thread.

See also: glfwSetInputMode

Since: Added in version 3.0.

◆ glfwGetJoystickAxes()

const float* glfwGetJoystickAxes	(	int	joy,
		int *	count
	)

This function returns the values of all axes of the specified joystick. Each element in the array is a value between -1.0 and 1.0.

Querying a joystick slot with no device present is not an error, but will cause this function to return NULL. Call glfwJoystickPresent to check device presence.

Parameters

[in]	joy	The joystick to query.
[out]	count	Where to store the number of axis values in the returned array. This is set to zero if the joystick is not present or an error occurred.

Returns: An array of axis values, or NULL if the joystick is not present or an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED, GLFW_INVALID_ENUM and GLFW_PLATFORM_ERROR.

Pointer lifetime: The returned array is allocated and freed by GLFW. You should not free it yourself. It is valid until the specified joystick is disconnected, this function is called again for that joystick or the library is terminated.

Thread safety: This function must only be called from the main thread.

See also: Joystick axis states

Since: Added in version 3.0. Replaces glfwGetJoystickPos.

◆ glfwGetJoystickButtons()

const unsigned char* glfwGetJoystickButtons	(	int	joy,
		int *	count
	)

This function returns the state of all buttons of the specified joystick. Each element in the array is either GLFW_PRESS or GLFW_RELEASE.

Querying a joystick slot with no device present is not an error, but will cause this function to return NULL. Call glfwJoystickPresent to check device presence.

Parameters

[in]	joy	The joystick to query.
[out]	count	Where to store the number of button states in the returned array. This is set to zero if the joystick is not present or an error occurred.

Returns: An array of button states, or NULL if the joystick is not present or an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED, GLFW_INVALID_ENUM and GLFW_PLATFORM_ERROR.

Pointer lifetime: The returned array is allocated and freed by GLFW. You should not free it yourself. It is valid until the specified joystick is disconnected, this function is called again for that joystick or the library is terminated.

Thread safety: This function must only be called from the main thread.

See also: Joystick button states

Since: Added in version 2.2. GLFW 3: Changed to return a dynamic array.

◆ glfwGetJoystickName()

const char* glfwGetJoystickName ( int joy )

This function returns the name, encoded as UTF-8, of the specified joystick. The returned string is allocated and freed by GLFW. You should not free it yourself.

Querying a joystick slot with no device present is not an error, but will cause this function to return NULL. Call glfwJoystickPresent to check device presence.

Parameters

[in] joy The joystick to query.

Returns: The UTF-8 encoded name of the joystick, or NULL if the joystick is not present or an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED, GLFW_INVALID_ENUM and GLFW_PLATFORM_ERROR.

Pointer lifetime: The returned string is allocated and freed by GLFW. You should not free it yourself. It is valid until the specified joystick is disconnected, this function is called again for that joystick or the library is terminated.

Thread safety: This function must only be called from the main thread.

See also: Joystick name

Since: Added in version 3.0.

◆ glfwGetKey()

int glfwGetKey	(	GLFWwindow *	window,
		int	key
	)

This function returns the last state reported for the specified key to the specified window. The returned state is one of GLFW_PRESS or GLFW_RELEASE. The higher-level action GLFW_REPEAT is only reported to the key callback.

If the GLFW_STICKY_KEYS input mode is enabled, this function returns GLFW_PRESS the first time you call it for a key that was pressed, even if that key has already been released.

The key functions deal with physical keys, with key tokens named after their use on the standard US keyboard layout. If you want to input text, use the Unicode character callback instead.

The modifier key bit masks are not key tokens and cannot be used with this function.

Do not use this function to implement text input.

Parameters

[in]	window	The desired window.
[in]	key	The desired keyboard key. `GLFW_KEY_UNKNOWN` is not a valid key for this function.

Returns: One of GLFW_PRESS or GLFW_RELEASE.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_INVALID_ENUM.

Thread safety: This function must only be called from the main thread.

See also: Key input

Since: Added in version 1.0. GLFW 3: Added window handle parameter.

◆ glfwGetKeyName()

const char* glfwGetKeyName	(	int	key,
		int	scancode
	)

This function returns the localized name of the specified printable key. This is intended for displaying key bindings to the user.

If the key is GLFW_KEY_UNKNOWN, the scancode is used instead, otherwise the scancode is ignored. If a non-printable key or (if the key is GLFW_KEY_UNKNOWN) a scancode that maps to a non-printable key is specified, this function returns NULL.
This behavior allows you to pass in the arguments passed to the key callback without modification.

The printable keys are:

GLFW_KEY_APOSTROPHE
GLFW_KEY_COMMA
GLFW_KEY_MINUS
GLFW_KEY_PERIOD
GLFW_KEY_SLASH
GLFW_KEY_SEMICOLON
GLFW_KEY_EQUAL
GLFW_KEY_LEFT_BRACKET
GLFW_KEY_RIGHT_BRACKET
GLFW_KEY_BACKSLASH
GLFW_KEY_WORLD_1
GLFW_KEY_WORLD_2
GLFW_KEY_0 to GLFW_KEY_9
GLFW_KEY_A to GLFW_KEY_Z
GLFW_KEY_KP_0 to GLFW_KEY_KP_9
GLFW_KEY_KP_DECIMAL
GLFW_KEY_KP_DIVIDE
GLFW_KEY_KP_MULTIPLY
GLFW_KEY_KP_SUBTRACT
GLFW_KEY_KP_ADD
GLFW_KEY_KP_EQUAL

Parameters

[in]	key	The key to query, or `GLFW_KEY_UNKNOWN`.
[in]	scancode	The scancode of the key to query.

Returns: The localized name of the key, or NULL.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Pointer lifetime: The returned string is allocated and freed by GLFW. You should not free it yourself. It is valid until the next call to glfwGetKeyName, or until the library is terminated.

Thread safety: This function must only be called from the main thread.

See also: Key names

Since: Added in version 3.2.

◆ glfwGetMouseButton()

int glfwGetMouseButton	(	GLFWwindow *	window,
		int	button
	)

This function returns the last state reported for the specified mouse button to the specified window. The returned state is one of GLFW_PRESS or GLFW_RELEASE.

If the GLFW_STICKY_MOUSE_BUTTONS input mode is enabled, this function GLFW_PRESS the first time you call it for a mouse button that was pressed, even if that mouse button has already been released.

Parameters

[in]	window	The desired window.
[in]	button	The desired mouse button.

Returns: One of GLFW_PRESS or GLFW_RELEASE.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_INVALID_ENUM.

Thread safety: This function must only be called from the main thread.

See also: Mouse button input

Since: Added in version 1.0. GLFW 3: Added window handle parameter.

◆ glfwGetTime()

double glfwGetTime ( void )

This function returns the value of the GLFW timer. Unless the timer has been set using glfwSetTime, the timer measures time elapsed since GLFW was initialized.

The resolution of the timer is system dependent, but is usually on the order of a few micro- or nanoseconds. It uses the highest-resolution monotonic time source on each supported platform.

Returns: The current value, in seconds, or zero if an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function may be called from any thread. Reading and writing of the internal timer offset is not atomic, so it needs to be externally synchronized with calls to glfwSetTime.

See also: Time input

Since: Added in version 1.0.

◆ glfwGetTimerFrequency()

uint64_t glfwGetTimerFrequency ( void )

This function returns the frequency, in Hz, of the raw timer.

Returns: The frequency of the timer, in Hz, or zero if an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function may be called from any thread.

See also: Time input; glfwGetTimerValue

Since: Added in version 3.2.

◆ glfwGetTimerValue()

uint64_t glfwGetTimerValue ( void )

This function returns the current value of the raw timer, measured in 1 / frequency seconds. To get the frequency, call glfwGetTimerFrequency.

Returns: The value of the timer, or zero if an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function may be called from any thread.

See also: Time input; glfwGetTimerFrequency

Since: Added in version 3.2.

◆ glfwJoystickPresent()

int glfwJoystickPresent ( int joy )

This function returns whether the specified joystick is present.

Parameters

[in] joy The joystick to query.

Returns: GLFW_TRUE if the joystick is present, or GLFW_FALSE otherwise.

Errors: Possible errors include GLFW_NOT_INITIALIZED, GLFW_INVALID_ENUM and GLFW_PLATFORM_ERROR.

Thread safety: This function must only be called from the main thread.

See also: Joystick input

Since: Added in version 3.0. Replaces glfwGetJoystickParam.

◆ glfwSetCharCallback()

GLFWcharfun glfwSetCharCallback	(	GLFWwindow *	window,
		GLFWcharfun	cbfun
	)

This function sets the character callback of the specified window, which is called when a Unicode character is input.

The character callback is intended for Unicode text input. As it deals with characters, it is keyboard layout dependent, whereas the key callback is not. Characters do not map 1:1 to physical keys, as a key may produce zero, one or more characters. If you want to know whether a specific physical key was pressed or released, see the key callback instead.

The character callback behaves as system text input normally does and will not be called if modifier keys are held down that would prevent normal text input on that platform, for example a Super (Command) key on OS X or Alt key on Windows. There is a character with modifiers callback that receives these events.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Text input

Since: Added in version 2.4. GLFW 3: Added window handle parameter and return value.

◆ glfwSetCharModsCallback()

GLFWcharmodsfun glfwSetCharModsCallback	(	GLFWwindow *	window,
		GLFWcharmodsfun	cbfun
	)

This function sets the character with modifiers callback of the specified window, which is called when a Unicode character is input regardless of what modifier keys are used.

The character with modifiers callback is intended for implementing custom Unicode character input. For regular Unicode text input, see the character callback. Like the character callback, the character with modifiers callback deals with characters and is keyboard layout dependent. Characters do not map 1:1 to physical keys, as a key may produce zero, one or more characters. If you want to know whether a specific physical key was pressed or released, see the key callback instead.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Text input

Since: Added in version 3.1.

◆ glfwSetClipboardString()

void glfwSetClipboardString	(	GLFWwindow *	window,
		const char *	string
	)

This function sets the system clipboard to the specified, UTF-8 encoded string.

Parameters

[in]	window	The window that will own the clipboard contents.
[in]	string	A UTF-8 encoded string.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Pointer lifetime: The specified string is copied before this function returns.

Thread safety: This function must only be called from the main thread.

See also: Clipboard input and output; glfwGetClipboardString

Since: Added in version 3.0.

◆ glfwSetCursor()

void glfwSetCursor	(	GLFWwindow *	window,
		GLFWcursor *	cursor
	)

This function sets the cursor image to be used when the cursor is over the client area of the specified window. The set cursor will only be visible when the cursor mode of the window is GLFW_CURSOR_NORMAL.

On some platforms, the set cursor may not be visible unless the window also has input focus.

Parameters

[in]	window	The window to set the cursor for.
[in]	cursor	The cursor to set, or `NULL` to switch back to the default arrow cursor.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Thread safety: This function must only be called from the main thread.

See also: Cursor objects

Since: Added in version 3.1.

◆ glfwSetCursorEnterCallback()

GLFWcursorenterfun glfwSetCursorEnterCallback	(	GLFWwindow *	window,
		GLFWcursorenterfun	cbfun
	)

This function sets the cursor boundary crossing callback of the specified window, which is called when the cursor enters or leaves the client area of the window.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Cursor enter/leave events

Since: Added in version 3.0.

◆ glfwSetCursorPos()

void glfwSetCursorPos	(	GLFWwindow *	window,
		double	xpos,
		double	ypos
	)

This function sets the position, in screen coordinates, of the cursor relative to the upper-left corner of the client area of the specified window. The window must have input focus. If the window does not have input focus when this function is called, it fails silently.

Do not use this function to implement things like camera controls. GLFW already provides the GLFW_CURSOR_DISABLED cursor mode that hides the cursor, transparently re-centers it and provides unconstrained cursor motion. See glfwSetInputMode for more information.

If the cursor mode is GLFW_CURSOR_DISABLED then the cursor position is unconstrained and limited only by the minimum and maximum values of a double.

Parameters

[in]	window	The desired window.
[in]	xpos	The desired x-coordinate, relative to the left edge of the client area.
[in]	ypos	The desired y-coordinate, relative to the top edge of the client area.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_PLATFORM_ERROR.

Thread safety: This function must only be called from the main thread.

See also: Cursor position; glfwGetCursorPos

Since: Added in version 3.0. Replaces glfwSetMousePos.

◆ glfwSetCursorPosCallback()

GLFWcursorposfun glfwSetCursorPosCallback	(	GLFWwindow *	window,
		GLFWcursorposfun	cbfun
	)

This function sets the cursor position callback of the specified window, which is called when the cursor is moved. The callback is provided with the position, in screen coordinates, relative to the upper-left corner of the client area of the window.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Cursor position

Since: Added in version 3.0. Replaces glfwSetMousePosCallback.

◆ glfwSetDropCallback()

GLFWdropfun glfwSetDropCallback	(	GLFWwindow *	window,
		GLFWdropfun	cbfun
	)

This function sets the file drop callback of the specified window, which is called when one or more dragged files are dropped on the window.

Because the path array and its strings may have been generated specifically for that event, they are not guaranteed to be valid after the callback has returned. If you wish to use them after the callback returns, you need to make a deep copy.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new file drop callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Path drop input

Since: Added in version 3.1.

◆ glfwSetInputMode()

void glfwSetInputMode	(	GLFWwindow *	window,
		int	mode,
		int	value
	)

This function sets an input mode option for the specified window. The mode must be one of GLFW_CURSOR, GLFW_STICKY_KEYS or GLFW_STICKY_MOUSE_BUTTONS.

If the mode is GLFW_CURSOR, the value must be one of the following cursor modes:

GLFW_CURSOR_NORMAL makes the cursor visible and behaving normally.
GLFW_CURSOR_HIDDEN makes the cursor invisible when it is over the client area of the window but does not restrict the cursor from leaving.
GLFW_CURSOR_DISABLED hides and grabs the cursor, providing virtual and unlimited cursor movement. This is useful for implementing for example 3D camera controls.

If the mode is GLFW_STICKY_KEYS, the value must be either GLFW_TRUE to enable sticky keys, or GLFW_FALSE to disable it. If sticky keys are enabled, a key press will ensure that glfwGetKey returns GLFW_PRESS the next time it is called even if the key had been released before the call. This is useful when you are only interested in whether keys have been pressed but not when or in which order.

If the mode is GLFW_STICKY_MOUSE_BUTTONS, the value must be either GLFW_TRUE to enable sticky mouse buttons, or GLFW_FALSE to disable it. If sticky mouse buttons are enabled, a mouse button press will ensure that glfwGetMouseButton returns GLFW_PRESS the next time it is called even if the mouse button had been released before the call. This is useful when you are only interested in whether mouse buttons have been pressed but not when or in which order.

Parameters

[in]	window	The window whose input mode to set.
[in]	mode	One of `GLFW_CURSOR`, `GLFW_STICKY_KEYS` or `GLFW_STICKY_MOUSE_BUTTONS`.
[in]	value	The new value of the specified input mode.

Errors: Possible errors include GLFW_NOT_INITIALIZED, GLFW_INVALID_ENUM and GLFW_PLATFORM_ERROR.

Thread safety: This function must only be called from the main thread.

See also: glfwGetInputMode

Since: Added in version 3.0. Replaces glfwEnable and glfwDisable.

◆ glfwSetJoystickCallback()

GLFWjoystickfun glfwSetJoystickCallback ( GLFWjoystickfun cbfun )

This function sets the joystick configuration callback, or removes the currently set callback. This is called when a joystick is connected to or disconnected from the system.

Parameters

[in] cbfun The new callback, or NULL to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Joystick configuration changes

Since: Added in version 3.2.

◆ glfwSetKeyCallback()

GLFWkeyfun glfwSetKeyCallback	(	GLFWwindow *	window,
		GLFWkeyfun	cbfun
	)

This function sets the key callback of the specified window, which is called when a key is pressed, repeated or released.

The key functions deal with physical keys, with layout independent key tokens named after their values in the standard US keyboard layout. If you want to input text, use the character callback instead.

When a window loses input focus, it will generate synthetic key release events for all pressed keys. You can tell these events from user-generated events by the fact that the synthetic ones are generated after the focus loss event has been processed, i.e. after the window focus callback has been called.

The scancode of a key is specific to that platform or sometimes even to that machine. Scancodes are intended to allow users to bind keys that don't have a GLFW key token. Such keys have key set to GLFW_KEY_UNKNOWN, their state is not saved and so it cannot be queried with glfwGetKey.

Sometimes GLFW needs to generate synthetic key events, in which case the scancode may be zero.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new key callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Key input

Since: Added in version 1.0. GLFW 3: Added window handle parameter and return value.

◆ glfwSetMouseButtonCallback()

GLFWmousebuttonfun glfwSetMouseButtonCallback	(	GLFWwindow *	window,
		GLFWmousebuttonfun	cbfun
	)

This function sets the mouse button callback of the specified window, which is called when a mouse button is pressed or released.

When a window loses input focus, it will generate synthetic mouse button release events for all pressed mouse buttons. You can tell these events from user-generated events by the fact that the synthetic ones are generated after the focus loss event has been processed, i.e. after the window focus callback has been called.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Mouse button input

Since: Added in version 1.0. GLFW 3: Added window handle parameter and return value.

◆ glfwSetScrollCallback()

GLFWscrollfun glfwSetScrollCallback	(	GLFWwindow *	window,
		GLFWscrollfun	cbfun
	)

This function sets the scroll callback of the specified window, which is called when a scrolling device is used, such as a mouse wheel or scrolling area of a touchpad.

The scroll callback receives all scrolling input, like that from a mouse wheel or a touchpad scrolling area.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new scroll callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or the library had not been initialized.

Errors: Possible errors include GLFW_NOT_INITIALIZED.

Thread safety: This function must only be called from the main thread.

See also: Scroll input

Since: Added in version 3.0. Replaces glfwSetMouseWheelCallback.

◆ glfwSetTime()

void glfwSetTime ( double time )

This function sets the value of the GLFW timer. It then continues to count up from that value. The value must be a positive finite number less than or equal to 18446744073.0, which is approximately 584.5 years.

Parameters

[in] time The new value, in seconds.

Errors: Possible errors include GLFW_NOT_INITIALIZED and GLFW_INVALID_VALUE.

Remarks: The upper limit of the timer is calculated as floor((2⁶⁴ - 1) / 10⁹) and is due to implementations storing nanoseconds in 64 bits. The limit may be increased in the future.

Thread safety: This function may be called from any thread. Reading and writing of the internal timer offset is not atomic, so it needs to be externally synchronized with calls to glfwGetTime.

See also: Time input

Since: Added in version 2.2.

Description

Modules

Typedefs

Functions

Macro Definition Documentation

◆ GLFW_PRESS

◆ GLFW_RELEASE

◆ GLFW_REPEAT

Typedef Documentation

◆ GLFWcharfun

◆ GLFWcharmodsfun

◆ GLFWcursorenterfun

◆ GLFWcursorposfun

◆ GLFWdropfun

◆ GLFWjoystickfun

◆ GLFWkeyfun

◆ GLFWmousebuttonfun

◆ GLFWscrollfun

Function Documentation

◆ glfwCreateCursor()

◆ glfwCreateStandardCursor()

◆ glfwDestroyCursor()

◆ glfwGetClipboardString()

◆ glfwGetCursorPos()

◆ glfwGetInputMode()

◆ glfwGetJoystickAxes()

◆ glfwGetJoystickButtons()

◆ glfwGetJoystickName()

◆ glfwGetKey()

◆ glfwGetKeyName()

◆ glfwGetMouseButton()

◆ glfwGetTime()

◆ glfwGetTimerFrequency()

◆ glfwGetTimerValue()

◆ glfwJoystickPresent()

◆ glfwSetCharCallback()

◆ glfwSetCharModsCallback()

◆ glfwSetClipboardString()

◆ glfwSetCursor()

◆ glfwSetCursorEnterCallback()

◆ glfwSetCursorPos()

◆ glfwSetCursorPosCallback()

◆ glfwSetDropCallback()

◆ glfwSetInputMode()

◆ glfwSetJoystickCallback()

◆ glfwSetKeyCallback()

◆ glfwSetMouseButtonCallback()

◆ glfwSetScrollCallback()

◆ glfwSetTime()