Provided by: libx11-doc_1.6.9-2ubuntu1.6_all 
NAME
XkbChangeControls - Provides a flexible method for updating the controls in a server to
match those in the changed keyboard description
SYNOPSIS
Bool XkbChangeControls (Display *dpy, XkbDescPtr xkb, XkbControlsChangesPtr changes);
ARGUMENTS
- dpy connection to X server
- xkb keyboard description with changed xkb->ctrls
- changes
which parts of xkb->ctrls have changed
DESCRIPTION
The XkbControlsChangesRec structure allows applications to track modifications to an
XkbControlsRec structure and thereby reduce the amount of traffic sent to the server. The
same XkbControlsChangesRec structure may be used in several successive modifications to
the same XkbControlsRec structure, then subsequently used to cause all of the changes, and
only the changes, to be propagated to the server.
The changed_ctrls field is a mask specifying which logical sets of data in the controls
structure have been modified. In this context, modified means set, that is, if a value is
set to the same value it previously contained, it has still been modified, and is noted as
changed. Valid values for changed_ctrls are any combination of the masks listed in Table 1
that have "ok" in the changed_ctrls column. Setting a bit implies the corresponding data
fields from the "Relevant XkbControlsRec Data Fields" column in Table 1 have been
modified. The enabled_ctrls_changes field specifies which bits in the enabled_ctrls field
have changed. If the number of keyboard groups has changed, the num_groups_changed field
is set to True.
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 Xkb Controls
───────────────────────────────────────────────────────────────────────────────────────────
Control Control
Selection Relevant
Mask (which XkbControlsRec Boolean Control
parameter) DataFields enabled_ctrls bit Section
───────────────────────────────────────────────────────────────────────────────────────────
AccessXFeedback XkbAccessX‐ ax_options: XkbAccessX‐ 10.6.3
FeedbackMask XkbAX_*FBMask FeedbackMask
AccessXKeys XkbAccessXKeys‐ 10.6.1
Mask
AccessXTimeout XkbAccessX‐ ax_timeout XkbAccessX‐ 10.6.2
TimeoutMask axt_opts_mask TimeoutMask
axt_opts_values
axt_ctrls_mask
axt_ctrls_values
AudibleBell XkbAudibleBell‐ 9.2
Mask
AutoReset 10.1.2
BounceKeys XkbBounce‐ debounce_delay XkbBounceKeysMask 10.6.7
KeysMask
Detectable- 10.3.3
Autorepeat
EnabledControls XkbControls‐ enabled_ctrls Non-Boolean 10.1.1
EnabledMask Control
GroupsWrap XkbGroupsWrap‐ groups_wrap Non-Boolean 10.7.1
Mask Control
IgnoreGroupLock XkbIgnore‐ 10.7.3
GroupLockMask
IgnoreLockMods XkbIgnore‐ ignore_lock Non-Boolean 5.1
LockModsMask Control
InternalMods XkbInternal‐ internal Non-Boolean 5.1
ModsMask Control
MouseKeys XkbMouseKeysMask mk_dflt_btn XkbMouseKeysMask 10.5.1
MouseKeysAccel XkbMouseKeys‐ mk_delay XkbMouseKeys‐ 10.5.2
AccelMask mk_interval AccelMask
mk_time_to_max
mk_max_speed
mk_curve
Overlay1 XkbOverlay1Mask 10.4
Overlay2 XkbOverlay2Mask 10.4
PerKeyRepeat XkbPerKeyRepeat‐ per_key_repeat Non-Boolean 10.3.1
Mask Control
RepeatKeys XkbRepeatKeys‐ repeat_delay XkbRepeatKeysMask 10.3
Mask
repeat_interval
SlowKeys XkbSlowKeysMask slow_keys_delay XkbSlowKeysMask 10.6.6
StickyKeys XkbStickyKeys‐ ax_options: XkbStickyKeysMask 10.6.8
Mask XkbAX_TwoKeysMask
XkbAX_LatchToLockMask
Table 2 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 2 Controls Mask Bits
──────────────────────────────────────────────────────────────────────
Mask Bit which or Value
changed enabled
_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)
If you have an Xkb description with controls that have been modified and an
XkbControlsChangesRec that describes the changes that have been made, the
XkbChangeControls function provides a flexible method for updating the controls in a
server to match those in the changed keyboard description.
XkbChangeControls copies any controls fields specified by changes from the keyboard
description controls structure, xkb->ctrls, to the server specified by dpy.
STRUCTURES
The XkbControlsChangesRec structure is defined as follows:
typedef struct _XkbControlsChanges {
unsigned int changed_ctrls; /∗ bits indicating changed control data
*/
unsigned int enabled_ctrls_changes; /∗ bits indicating enabled/disabled
controls */
Bool num_groups_changed; /∗ True if number of keyboard groups
changed */
} XkbControlsChangesRec,*XkbControlsChangesPtr;