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XkbGetControlsChanges(3)	 XKB FUNCTIONS	      XkbGetControlsChanges(3)

NAME
       XkbGetControlsChanges  -	Updates	a local	copy of	a keyboard description
       with the	changes	previously noted by one	or more	calls  to  XkbNoteCon-
       trolsChanges

SYNOPSIS
       XkbGetControlsChanges  (Display *dpy, XkbDescPtr	xkb, XkbNameChangesPtr
	      changes);

ARGUMENTS
       - dpy  connection to X server

       - xkb  xkb->ctrls will be updated

       - changes
	      indicates	which parts of xkb->ctrls to update

DESCRIPTION
       Whenever	a field	in the controls	structure changes in the server's key-
       board  description,  the	server sends an	XkbControlsNotify event	to all
       interested clients.To receive XkbControlsNotify events under all	possi-
       ble  conditions,	 use XkbSelectEvents and pass XkbControlsNotifyMask in
       both bits_to_change and values_for_bits.

       To receive XkbControlsNotify events only	under certain conditions,  use
       XkbSelectEventDetails  using  XkbControlsNotify	as  the	event_type and
       specifying  the	desired	 state	changes	 in  bits_to_change  and  val-
       ues_for_bits using mask bits from Table 1.

       Table  1	 shows	the actual values for the individual mask bits used to
       select controls for modification	and to enable and disable the control.
       Note that the same mask bit is used to specify general modifications to
       the parameters used to configure	the control (which), and to enable and
       disable	the  control  (enabled_ctrls).	The anomalies in the table (no
       "ok" in column) are for controls	that have no configurable  attributes;
       and  for	controls that are not boolean controls and therefore cannot be
       enabled or disabled.

			      Table 1 Controls Mask Bits
       --------------------------------------------------------------------------
       Mask Bit			 which or	 enabled   Value
				 changed_ctrls	 _ctrls
       --------------------------------------------------------------------------
       XkbRepeatKeysMask	 ok		 ok	   (1L<<0)
       XkbSlowKeysMask		 ok		 ok	   (1L<<1)
       XkbBounceKeysMask	 ok		 ok	   (1L<<2)
       XkbStickyKeysMask	 ok		 ok	   (1L<<3)
       XkbMouseKeysMask		 ok		 ok	   (1L<<4)
       XkbMouseKeysAccelMask	 ok		 ok	   (1L<<5)
       XkbAccessXKeysMask	 ok		 ok	   (1L<<6)
       XkbAccessXTimeoutMask	 ok		 ok	   (1L<<7)
       XkbAccessXFeedbackMask	 ok		 ok	   (1L<<8)
       XkbAudibleBellMask			 ok	   (1L<<9)
       XkbOverlay1Mask				 ok	   (1L<<10)
       XkbOverlay2Mask				 ok	   (1L<<11)
       XkbIgnoreGroupLockMask			 ok	   (1L<<12)
       XkbGroupsWrapMask	 ok			   (1L<<27)
       XkbInternalModsMask	 ok			   (1L<<28)
       XkbIgnoreLockModsMask	 ok			   (1L<<29)
       XkbPerKeyRepeatMask	 ok			   (1L<<30)

       XkbControlsEnabledMask	 ok			   (1L<<31)
       XkbAccessXOptionsMask	 ok		 ok	   (XkbStickyKeysMask |
       XkbAccessXFeedbackMask)
       XkbAllBooleanCtrlsMask			 ok	   (0x00001FFF)
       XkbAllControlsMask	 ok			   (0xF8001FFF)

       The changed_ctrls field specifies the  controls	components  that  have
       changed and consists of bits taken from the masks defined in Table 10.7
       with "ok" in the	changed_ctrls column.

       The controls currently enabled in the server are	reported  in  the  en-
       abled_ctrls  field. If any controls were	just enabled or	disabled (that
       is, the contents	of the enabled_ctrls field changed), they are  flagged
       in  the enabled_ctrl_changes field. The valid bits for these fields are
       the masks listed	in Table 10.7 with "ok"	in the	enabled_ctrls  column.
       The  num_groups field reports the number	of groups bound	to the key be-
       longing to the most number of groups and	is automatically updated  when
       the keyboard mapping changes.

       If  the	change	was caused by a	request	from a client, the keycode and
       event_type fields are set to  zero  and	the  req_major	and  req_minor
       fields identify the request. The	req_major value	is the same as the ma-
       jor extension opcode. Otherwise,	event_type is set to the type of event
       that  caused  the  change (one of KeyPress, KeyRelease, DeviceKeyPress,
       DeviceKeyRelease, ButtonPress  or  ButtonRelease),  and	req_major  and
       req_minor  are  undefined.  If  event_type is KeyPress, KeyRelease, De-
       viceKeyPress, or	DeviceKeyRelease, the keycode field is set to the  key
       that  caused the	change.	If event_type is ButtonPress or	ButtonRelease,
       keycode contains	the button number.

       When a client receives an XkbControlsNotify  event,  it	can  note  the
       changes in a changes structure using XkbNoteControlsChanges.

       XkbGetControlsChanges  examines	the  changes  parameter,  queries  the
       server for the necessary	information, and copies	the results  into  the
       xkb-_ctrls keyboard description.	If the ctrls field of xkb is NULL, Xk-
       bGetControlsChanges allocates and initializes it.  To  free  the	 ctrls
       field, use XkbFreeControls.

       XkbGetControlsChanges  returns  Success	if successful and can generate
       BadAlloc, BadImplementation, and	BadMatch errors.

RETURN VALUES
       Success	      The XkbGetControlsChanges	function  returns  Success  if
		      the query	of the server was successful.

STRUCTURES
       The structure for the XkbControlsNotify event is	defined	as follows:

       typedef struct {
	   int		 type;		/* Xkb extension base event code */
	   unsigned long serial;	/* X server serial number for event */
	   Bool		 send_event;	/* True	=> synthetically generated */
	   Display *	 display;	/* server connection where event generated */
	   Time		 time;		/* server time when event generated */
	   int		 xkb_type;	/* XkbCompatMapNotify */
	   int		 device;	/* Xkb device ID, will not be XkbUseCoreKbd */
	   unsigned int	 changed_ctrls;	/* bits	indicating which controls data have
       changed*/
	   unsigned int	 enabled_ctrls;	/* controls currently enabled in server	*/
	   unsigned int	 enabled_ctrl_changes; /* bits indicating enabled/disabled
       controls	*/
	   int		 num_groups;	/* current number of keyboard groups */
	   KeyCode	 keycode;	/* != 0	=> keycode of key causing change */
	   char		 event_type;	/* Type	of event causing change	*/
	   char		 req_major;	/* major event code of event causing change */
	   char		 req_minor;	/* minor event code of event causing change */
       } XkbControlsNotifyEvent;

DIAGNOSTICS
       BadAlloc	      Unable to	allocate storage

       BadImplementation
		      Invalid reply from server

       BadMatch	      A	 compatible  version  of  Xkb was not available	in the
		      server or	an argument has	correct	type and range,	but is
		      otherwise	invalid

SEE ALSO
       XkbFreeControls(3),     XkbNoteControlsChanges(3),    XkbSelectEventDe-
       tails(3), XkbSelectEvents(3)

X Version 11			 libX11	1.6.12	      XkbGetControlsChanges(3)

NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURN VALUES | STRUCTURES | DIAGNOSTICS | SEE ALSO

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