XGrabKey(3)							  XLIB FUNCTIONS						       XGrabKey(3)

NAME

       XGrabKey, XUngrabKey - grab keyboard keys

SYNTAX

       int XGrabKey(Display *display, int keycode, unsigned int modifiers, Window grab_window, Bool owner_events, int pointer_mode, int key-
	      board_mode);

       int XUngrabKey(Display *display, int keycode, unsigned int modifiers, Window grab_window);

ARGUMENTS

       display	 Specifies the connection to the X server.

       grab_window
		 Specifies the grab window.

       keyboard_mode
		 Specifies further processing of keyboard events.  You can pass GrabModeSync or GrabModeAsync.

       keycode	 Specifies the KeyCode or AnyKey.

       modifiers Specifies the set of keymasks or AnyModifier.	The mask is the bitwise inclusive OR of the valid keymask bits.

       owner_events
		 Specifies a Boolean value that indicates whether the keyboard events are to be reported as usual.

       pointer_mode
		 Specifies further processing of pointer events.  You can pass GrabModeSync or GrabModeAsync.

DESCRIPTION

       The XGrabKey function establishes a passive grab on the keyboard.  In the future, the keyboard is actively grabbed (as for XGrabKeyboard),
       the last-keyboard-grab time is set to the time at which the key was pressed (as transmitted in the KeyPress event), and the KeyPress event
       is reported if all of the following conditions are true:

       o    The keyboard is not grabbed and the specified key (which can itself be a modifier key) is logically pressed when the specified modi-
	    fier keys are logically down, and no other modifier keys are logically down.

       o    Either the grab_window is an ancestor of (or is) the focus window, or the grab_window is a descendant of the focus window and contains
	    the pointer.

       o    A passive grab on the same key combination does not exist on any ancestor of grab_window.

       The interpretation of the remaining arguments is as for XGrabKeyboard.  The active grab is terminated automatically when the logical state
       of the keyboard has the specified key released (independent of the logical state of the modifier keys), at which point a KeyRelease event
       is reported to the grabbing window.

       Note that the logical state of a device (as seen by client applications) may lag the physical state if device event processing is frozen.

       A modifiers argument of AnyModifier is equivalent to issuing the request for all possible modifier combinations (including the combination
       of no modifiers).  It is not required that all modifiers specified have currently assigned KeyCodes.  A keycode argument of AnyKey is
       equivalent to issuing the request for all possible KeyCodes.  Otherwise, the specified keycode must be in the range specified by min_key-
       code and max_keycode in the connection setup, or a BadValue error results.

       If some other client has issued a XGrabKey with the same key combination on the same window, a BadAccess error results.	When using AnyMod-
       ifier or AnyKey, the request fails completely, and a BadAccess error results (no grabs are established) if there is a conflicting grab for
       any combination.

       XGrabKey can generate BadAccess, BadValue, and BadWindow errors.

       The XUngrabKey function releases the key combination on the specified window if it was grabbed by this client.  It has no effect on an
       active grab.  A modifiers of AnyModifier is equivalent to issuing the request for all possible modifier combinations (including the combi-
       nation of no modifiers).  A keycode argument of AnyKey is equivalent to issuing the request for all possible key codes.

       XUngrabKey can generate BadValue and BadWindow error.

DIAGNOSTICS

       BadAccess A client attempted to grab a key/button combination already grabbed by another client.

       BadValue  Some numeric value falls outside the range of values accepted by the request.	Unless a specific range is specified for an argu-
		 ment, the full range defined by the argument's type is accepted.  Any argument defined as a set of alternatives can generate this
		 error.

       BadWindow A value for a Window argument does not name a defined Window.

SEE ALSO

       XAllowEvents(3), XGrabButton(3), XGrabKeyboard(3), XGrabPointer(3)
       Xlib - C Language X Interface

X Version 11							   libX11 1.5.0 						       XGrabKey(3)