XkbGetControlsChanges.man [plain text]
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.TH XkbGetControlsChanges __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
.SH NAME
XkbGetControlsChanges \- Updates a local copy of a keyboard description with the
changes previously noted by one or more calls to XkbNoteControlsChanges
.SH SYNOPSIS
XkbGetControlsChanges
(
.I dpy,
.I xkb,
.I changes
)
.br
Display * \fIdpy\fP\^;
.br
XkbDescPtr \fIxkb\fP\^;
.br
XkbNameChangesPtr \fIchanges\fP\^;
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I \- dpy
connection to X server
.TP
.I \- xkb
xkb->ctrls will be updated
.TP
.I \- changes
indicates which parts of xkb->ctrls to update
.SH DESCRIPTION
.LP
Whenever a field in the controls structure changes in the server's keyboard
description, the server sends an XkbControlsNotify event to all interested
clients.To receive XkbControlsNotify events under all possible conditions, use
.I XkbSelectEvents
and pass XkbControlsNotifyMask in both
.I bits_to_change
and
.I values_for_bits.
To receive XkbControlsNotify events only under certain conditions, use
.I XkbSelectEventDetails
using XkbControlsNotify as the
.I event_type
and specifying the desired state changes in
.I bits_to_change
and
.I values_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.
.TS
c s s s
l l l l
l l l l
l l l l.
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)
.TE
The
.I 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
.I changed_ctrls
column.
The controls currently enabled in the server are reported in the
.I enabled_ctrls
field. If any controls were just enabled or disabled (that is, the contents of
the
.I enabled_ctrls
field changed), they are flagged in the
.I enabled_ctrl_changes
field. The valid bits for these fields are the masks listed in Table 10.7 with
"ok" in the
.I enabled_ctrls
column. The
.I num_groups
field reports the number of groups bound to the key belonging 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
.I keycode
and
.I event_type
fields are set to zero and the
.I req_major
and
.I req_minor
fields identify the request. The
.I req_major value is the same as the major extension opcode. Otherwise,
.I event_type
is set to the type of event that caused the change (one of KeyPress, KeyRelease,
DeviceKeyPress, DeviceKeyRelease, ButtonPress or ButtonRelease), and
.I req_major
and
.I req_minor
are undefined. If
.I event_type
is KeyPress, KeyRelease, DeviceKeyPress, or DeviceKeyRelease, the
.I keycode
field is set to the key that caused the change. If
.I event_type
is ButtonPress or ButtonRelease,
.I keycode
contains the button number.
When a client receives an XkbControlsNotify event, it can note the changes in a
changes structure using
.I XkbNoteControlsChanges.
.I XkbGetControlsChanges
examines the
.I changes
parameter, queries the server for the necessary information, and copies the
results into the
.I xkb->ctrls
keyboard description. If the
.I ctrls
field of
.I xkb
is NULL,
.I XkbGetControlsChanges
allocates and initializes it. To free the
.I ctrls
field, use
XkbFreeControls.
.I XkbGetControlsChanges
returns Success if successful and can generate BadAlloc, BadImplementation, and
BadMatch errors.
.SH "RETURN VALUES"
.TP 15
Success
The
.I XkbGetControlsChanges
function returns Success if the query of the server was successful.
.SH STRUCTURES
.LP
.nf
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;
.fi
.SH DIAGNOSTICS
.TP 15
.B BadAlloc
Unable to allocate storage
.TP 15
.B BadImplementation
Invalid reply from server
.TP 15
.B BadMatch
A compatible version of Xkb was not available in the server or an argument has
correct type and range, but is otherwise invalid
.SH "SEE ALSO"
.BR XkbFreeControls (__libmansuffix__),
.BR XkbNoteControlsChanges (__libmansuffix__),
.BR XkbSelectEventDetails (__libmansuffix__),
.BR XkbSelectEvents (__libmansuffix__)