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XkbChangeMap(3)                  XKB FUNCTIONS                 XkbChangeMap(3)

       XkbChangeMap  -  Update  only partial components of a keyboard descrip-
       tion, modify the appropriate fields in the server and map components of
       a local copy of the keyboard description

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

       - dpy  connection to X server

       - xkb  description from which new values are taken

       - changes
              identifies component parts to update

       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 XkbMapChanges-
       Rec 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

       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 compo-
                      nents specified by changes are not present  in  the  xkb

       Use  the XkbMapChangesRec structure to identify and track partial modi-
       fications to the mapping 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;

       BadAlloc       Unable to allocate storage

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

       BadValue       An argument is out of range

X Version 11                     libX11 1.1.5                  XkbChangeMap(3)