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X11R7.4 - man page for xkbchangemap (x11r4 section 3)

XkbChangeMap(3) 			  XKB FUNCTIONS 			  XkbChangeMap(3)

NAME
       XkbChangeMap - Update only partial components of a keyboard description, modify the appro-
       priate fields in the server and map components of a local copy of the keyboard description

SYNOPSIS
       Bool XkbChangeMap ( dpy, xkb, changes )
	     Display * dpy;
	     XkbDescPtr xkb;
	     XkbMapChangesPtr changes;

ARGUMENTS
       - dpy  connection to X server

       - xkb  description from which new values are taken

       - changes
	      identifies component parts to update

DESCRIPTION
       To update only partial components of a keyboard description, modify the appropriate fields
       in  the	server	and map components of a local copy of the keyboard description, then call
       XkbChangeMap with an XkbMapChangesRec structure indicating which components have changed.

       XkbChangeMap copies any components specified by the changes structure  from  the  keyboard
       description, xkb, to the X server specified by dpy.

       If  any components specified by changes are not present in the xkb parameter, XkbChangeMap
       returns False. Otherwise, it sends a request to the server and returns True.

       XkbChangeMap can generate BadAlloc, BadLength, and BadValue protocol errors.

RETURN VALUES
       True	      The XkbChangeMap function returns  True  if  the	components  specified  by
		      changes are present in the xkb parameter.

       False	      The  XkbChangeMap  function  returns  False  if the components specified by
		      changes are not present in the xkb parameter.

STRUCTURES
       Use the XkbMapChangesRec structure to identify and track partial modifications to the map-
       ping components and to reduce the amount of traffic between the server and clients.

       typedef struct _XkbMapChanges {
	   unsigned short   changed;		/* identifies valid components in
       structure */
	   KeyCode	    min_key_code;	/* lowest numbered keycode for device
       */
	   KeyCode	    max_key_code;	/* highest numbered keycode for device
       */
	   unsigned char    first_type; 	/* index of first key type modified */
	   unsigned char    num_types;		/* # types modified */
	   KeyCode	    first_key_sym;	/* first key whose key_sym_map changed
       */
	   unsigned char    num_key_syms;	/* # key_sym_map entries changed */
	   KeyCode	    first_key_act;	/* first key whose key_acts entry
       changed */
	   unsigned char    num_key_acts;	/* # key_acts entries changed */
	   KeyCode	    first_key_behavior; /* first key whose behaviors changed */
	   unsigned char    num_key_behaviors;	/* # behaviors entries changed */
	   KeyCode	    first_key_explicit; /* first key whose explicit entry
       changed */
	   unsigned char    num_key_explicit;	/* # explicit entries changed */
	   KeyCode	    first_modmap_key;	/* first key whose modmap entry changed
       */
	   unsigned char    num_modmap_keys;	/* # modmap entries changed */
	   KeyCode	    first_vmodmap_key;	/* first key whose vmodmap changed */
	   unsigned char    num_vmodmap_keys;	/* # vmodmap entries changed */
	   unsigned char    pad1;		/* reserved */
	   unsigned short   vmods;		/* mask indicating which vmods changed
       */
       } XkbMapChangesRec,*XkbMapChangesPtr;

DIAGNOSTICS
       BadAlloc       Unable to allocate storage

       BadLength      The  length  of  a request is shorter or longer than that required to mini-
		      mally contain the arguments

       BadValue       An argument is out of range

X Version 11				   libX11 1.2.1 			  XkbChangeMap(3)


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