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XkbKeyNumGroups(3) XKB FUNCTIONS XkbKeyNumGroups(3)
NAME
XkbKeyNumGroups - Returns the number of groups of symbols bound to the
key corresponding to keycode
SYNOPSIS
int XkbKeyNumGroups (XkbDescPtr xkb, KeyCode keycode);
ARGUMENTS
xkb Xkb description of interest
keycode
keycode of interest
DESCRIPTION
The group_info field of an XkbSymMapRec is an encoded value containing
the number of groups of symbols bound to the key as well as the
specification of the treatment of out-of-range groups. It is legal for
a key to have zero groups, in which case it also has zero symbols and
all events from that key yield NoSymbol. To obtain the number of
groups of symbols bound to the key, use XkbKeyNumGroups. To change the
number of groups bound to a key, use XkbChangeTypesOfKey. To obtain a
mask that determines the treatment of out-of-range groups, use
XkbKeyGroupInfo and XkbOutOfRangeGroupInfo.
The keyboard controls contain a groups_wrap field specifying the
handling of illegal groups on a global basis. That is, when the user
performs an action causing the effective group to go out of the legal
range, the groups_wrap field specifies how to normalize the effective
keyboard group to a group that is legal for the keyboard as a whole,
but there is no guarantee that the normalized group will be within the
range of legal groups for any individual key. The per-key group_info
field specifies how a key treats a legal effective group if the key
does not have a type specified for the group of concern. For example,
the Enter key usually has just one group defined. If the user performs
an action causing the global keyboard group to change to Group2, the
group_info field for the Enter key describes how to handle this
situation.
Out-of-range groups for individual keys are mapped to a legal group
using the same options as are used for the overall keyboard group. The
particular type of mapping used is controlled by the bits set in the
group_info flag, as shown in Table 1.
Table 1 group_info Range Normalization
----------------------------------------------
Bits set in group_info Normalization method
----------------------------------------------
XkbRedirectIntoRange XkbRedirectIntoRange
XkbClampIntoRange XkbClampIntoRange
none of the above XkbWrapIntoRange
The Xkb extension is composed of two parts: a server extension, and a
client-side X library extension. This chapter discusses functions used
to modify controls effecting the behavior of the server portion of the
Xkb extension. X Library Controls discusses functions used to modify
controls that affect only the behavior of the client portion of the
extension; those controls are known as Library Controls.
Xkb contains control features that affect the entire keyboard, known as
global keyboard controls. Some of the controls may be selectively
enabled and disabled; these controls are known as the Boolean Controls.
Boolean Controls can be turned on or off under program control and can
also be automatically set to an on or off condition when a client
program exits. The remaining controls, known as the Non-Boolean
Controls, are always active. The XkbControlsRec structure describes the
current state of most of the global controls and the attributes
effecting the behavior of each of these Xkb features. This chapter
describes the Xkb controls and how to manipulate them.
There are two possible components for each of the Boolean Controls:
attributes describing how the control should work, and a state
describing whether the behavior as a whole is enabled or disabled. The
attributes and state for most of these controls are held in the
XkbControlsRec structure.
You can manipulate the Xkb controls individually, via convenience
functions, or as a whole. To treat them as a group, modify an
XkbControlsRec structure to describe all of the changes to be made, and
then pass that structure and appropriate flags to an Xkb library
function, or use a XkbControlsChangesRec to reduce network traffic.
When using a convenience function to manipulate one control
individually, you do not use an XkbControlsRec structure directly.
The Xkb controls are grouped as shown in Table 2.
Table 2 Xkb Keyboard Controls
---------------------------------------------------------------
Type of Control Control Name Boolean Control?
---------------------------------------------------------------
Controls for EnabledControls No
enabling and
disabling other
controls
AutoReset No
---------------------------------------------------------------
Control for bell AudibleBell Boolean
behavior
---------------------------------------------------------------
Controls for repeat PerKeyRepeat No
key behavior
RepeatKeys Boolean
DetectableAutorepeat Boolean
---------------------------------------------------------------
Controls for Overlay1 Boolean
keyboard overlays
Overlay2 Boolean
---------------------------------------------------------------
Controls for using MouseKeys Boolean
the mouse from the
keyboard
MouseKeysAccel Boolean
---------------------------------------------------------------
Controls for better AccessXFeedback Boolean
keyboard access by
physically impaired
persons
AccessXKeys Boolean
AccessXTimeout Boolean
BounceKeys Boolean
SlowKeys Boolean
StickyKeys Boolean
---------------------------------------------------------------
Controls for general GroupsWrap No
keyboard mapping
IgnoreGroupLock Boolean
IgnoreLockMods No
InternalMods No
---------------------------------------------------------------
The individual categories and controls are described first, together
with functions for manipulating them.
STRUCTURES
The KeySymMapRec structure is defined as follows:
#define XkbNumKbdGroups 4
#define XkbMaxKbdGroup (XkbNumKbdGroups-1)
typedef struct { /* map to keysyms for a single keycode */
unsigned char kt_index[XkbNumKbdGroups]; /* key type index for each group */
unsigned char group_info; /* # of groups and out of range group handling */
unsigned char width; /* max # of shift levels for key */
unsigned short offset; /* index to keysym table in syms array */
} XkbSymMapRec, *XkbSymMapPtr;
The XkbControlsRec structure is defined as follows:
#define XkbMaxLegalKeyCode 255
#define XkbPerKeyBitArraySize ((XkbMaxLegalKeyCode+1)/8)
typedef struct {
unsigned char mk_dflt_btn; /* default button for keyboard driven mouse */
unsigned char num_groups; /* number of keyboard groups */
unsigned char groups_wrap; /* how to wrap out-of-bounds groups */
XkbModsRec internal; /* defines server internal modifiers */
XkbModsRec ignore_lock; /* modifiers to ignore when checking for grab */
unsigned int enabled_ctrls; /* 1 bit => corresponding boolean control enabled */
unsigned short repeat_delay; /* ms delay until first repeat */
unsigned short repeat_interval; /* ms delay between repeats */
unsigned short slow_keys_delay; /* ms minimum time key must be down to be ok */
unsigned short debounce_delay; /* ms delay before key reactivated */
unsigned short mk_delay; /* ms delay to second mouse motion event */
unsigned short mk_interval; /* ms delay between repeat mouse events */
unsigned short mk_time_to_max; /* # intervals until constant mouse move */
unsigned short mk_max_speed; /* multiplier for maximum mouse speed */
short mk_curve; /* determines mouse move curve type */
unsigned short ax_options; /* 1 bit => Access X option enabled */
unsigned short ax_timeout; /* seconds until Access X disabled */
unsigned short axt_opts_mask; /* 1 bit => options to reset on Access X timeout */
unsigned short axt_opts_values; /* 1 bit => turn option on, 0=> off */
unsigned int axt_ctrls_mask; /* which bits in enabled_ctrls to modify */
unsigned int axt_ctrls_values; /* values for new bits in enabled_ctrls */
unsigned char per_key_repeat[XkbPerKeyBitArraySize]; /* per key auto repeat */
} XkbControlsRec, *XkbControlsPtr;
The XkbControlsRec structure is defined as follows:
#define XkbMaxLegalKeyCode 255
#define XkbPerKeyBitArraySize ((XkbMaxLegalKeyCode+1)/8)
typedef struct {
unsigned char mk_dflt_btn; /* default button for keyboard driven mouse */
unsigned char num_groups; /* number of keyboard groups */
unsigned char groups_wrap; /* how to wrap out-of-bounds groups */
XkbModsRec internal; /* defines server internal modifiers */
XkbModsRec ignore_lock; /* modifiers to ignore when checking for grab */
unsigned int enabled_ctrls; /* 1 bit => corresponding booleancontrol enabled */
unsigned short repeat_delay; /* ms delay until first repeat */
unsigned short repeat_interval; /* ms delay between repeats */
unsigned short slow_keys_delay; /* ms minimum time key must be down to be ok */
unsigned short debounce_delay; /* ms delay before key reactivated */
unsigned short mk_delay; /* ms delay to second mouse motion event */
unsigned short mk_interval; /* ms delay between repeat mouse events */
unsigned short mk_time_to_max; /* # intervals until constant mouse move */
unsigned short mk_max_speed; /* multiplier for maximum mouse speed */
short mk_curve; /* determines mouse move curve type */
unsigned short ax_options; /* 1 bit => Access X option enabled */
unsigned short ax_timeout; /* seconds until Access X disabled */
unsigned short axt_opts_mask; /* 1 bit => options to reset on Access X timeout */
unsigned short axt_opts_values; /* 1 bit => turn option on, 0=> off */
unsigned int axt_ctrls_mask; /* which bits in enabled_ctrls to modify */
unsigned int axt_ctrls_values; /* values for new bits in enabled_ctrls */
unsigned char per_key_repeat[XkbPerKeyBitArraySize]; /* per key auto repeat */
} XkbControlsRec, *XkbControlsPtr;
SEE ALSO
XkbChangeTypesOfKey(3), XkbKeyGroupInfo(3), XkbOutOfRangeGroupInfo.(3)
X Version 11 libX11 1.8.6 XkbKeyNumGroups(3)