XkbKeyNumGroups
Section: XKB FUNCTIONS (3)
Updated: libX11 1.6.4
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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 enabling and disabling other controls
| EnabledControls | No
|
| AutoReset | No
|
|
Control for bell behavior
| AudibleBell | Boolean
|
|
Controls for repeat key behavior
| PerKeyRepeat | No
|
| RepeatKeys | Boolean
|
| DetectableAutorepeat | Boolean
|
|
Controls for keyboard overlays
| Overlay1 | Boolean
|
| Overlay2 | Boolean
|
|
Controls for using the mouse from the keyboard
| MouseKeys | Boolean
|
| MouseKeysAccel | Boolean
|
|
Controls for better keyboard access by
| AccessXFeedback | Boolean
|
|
physically impaired persons
| AccessXKeys | Boolean
|
| AccessXTimeout | Boolean
|
| BounceKeys | Boolean
|
| SlowKeys | Boolean
|
| StickyKeys | Boolean
|
|
Controls for general keyboard mapping
| GroupsWrap | No
|
| 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 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;
SEE ALSO
XkbChangeTypesOfKey(3),
XkbKeyGroupInfo(3),
XkbOutOfRangeGroupInfo.(3)
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
-
- DESCRIPTION
-
- STRUCTURES
-
- SEE ALSO
-
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