1XkbKeyNumGroups(3) XKB FUNCTIONS XkbKeyNumGroups(3)
2
6 XkbKeyNumGroups - Returns the number of groups of symbols bound to the
7 key corresponding to keycode
8
10 int XkbKeyNumGroups (XkbDescPtr xkb, KeyCode keycode);
11
13 - xkb Xkb description of interest
14 - keycode
16 keycode of interest
17
19 The group_info field of an XkbSymMapRec is an encoded value containing
20 the number of groups of symbols bound to the key as well as the speci‐
21 fication of the treatment of out-of-range groups. It is legal for a key
22 to have zero groups, in which case it also has zero symbols and all
23 events from that key yield NoSymbol. To obtain the number of groups of
24 symbols bound to the key, use XkbKeyNumGroups. To change the number of
25 groups bound to a key, use XkbChangeTypesOfKey. To obtain a mask that
26 determines the treatment of out-of-range groups, use XkbKeyGroupInfo
27 and XkbOutOfRangeGroupInfo.
28 The keyboard controls contain a groups_wrap field specifying the han‐
30 dling of illegal groups on a global basis. That is, when the user per‐
31 forms an action causing the effective group to go out of the legal
32 range, the groups_wrap field specifies how to normalize the effective
33 keyboard group to a group that is legal for the keyboard as a whole,
34 but there is no guarantee that the normalized group will be within the
35 range of legal groups for any individual key. The per-key group_info
36 field specifies how a key treats a legal effective group if the key
37 does not have a type specified for the group of concern. For example,
38 the Enter key usually has just one group defined. If the user performs
39 an action causing the global keyboard group to change to Group2, the
40 group_info field for the Enter key describes how to handle this situa‐
41 tion.
42 Out-of-range groups for individual keys are mapped to a legal group
44 using the same options as are used for the overall keyboard group. The
45 particular type of mapping used is controlled by the bits set in the
46 group_info flag, as shown in Table 1.
47 Table 1 group_info Range Normalization
49 ──────────────────────────────────────────────
50 Bits set in group_info Normalization method
51 ──────────────────────────────────────────────
52 XkbRedirectIntoRange XkbRedirectIntoRange
53 XkbClampIntoRange XkbClampIntoRange
54 none of the above XkbWrapIntoRange
55 The Xkb extension is composed of two parts: a server extension, and a
57 client-side X library extension. This chapter discusses functions used
58 to modify controls effecting the behavior of the server portion of the
59 Xkb extension. X Library Controls discusses functions used to modify
60 controls that affect only the behavior of the client portion of the
61 extension; those controls are known as Library Controls.
62 Xkb contains control features that affect the entire keyboard, known as
64 global keyboard controls. Some of the controls may be selectively
65 enabled and disabled; these controls are known as the Boolean Controls.
66 Boolean Controls can be turned on or off under program control and can
67 also be automatically set to an on or off condition when a client pro‐
68 gram exits. The remaining controls, known as the Non-Boolean Controls,
69 are always active. The XkbControlsRec structure describes the current
70 state of most of the global controls and the attributes effecting the
71 behavior of each of these Xkb features. This chapter describes the Xkb
72 controls and how to manipulate them.
73 There are two possible components for each of the Boolean Controls:
75 attributes describing how the control should work, and a state describ‐
76 ing whether the behavior as a whole is enabled or disabled. The
77 attributes and state for most of these controls are held in the XkbCon‐
78 trolsRec structure.
79 You can manipulate the Xkb controls individually, via convenience func‐
81 tions, or as a whole. To treat them as a group, modify an XkbControl‐
82 sRec structure to describe all of the changes to be made, and then pass
83 that structure and appropriate flags to an Xkb library function, or use
84 a XkbControlsChangesRec to reduce network traffic. When using a conve‐
85 nience function to manipulate one control individually, you do not use
86 an XkbControlsRec structure directly.
87 The Xkb controls are grouped as shown in Table 2.
89 Table 2 Xkb Keyboard Controls
91 ───────────────────────────────────────────────────────────────
92 Type of Control Control Name Boolean Control?
94 ───────────────────────────────────────────────────────────────
95 Controls for EnabledControls No
96 enabling and AutoReset No
97 disabling other con‐
98 trols
99 ───────────────────────────────────────────────────────────────
100 Control for bell AudibleBell Boolean
101 behavior
102 ───────────────────────────────────────────────────────────────
103 Controls for repeat PerKeyRepeat No
104 key behavior RepeatKeys Boolean
105 DetectableAutorepeat Boolean
106 ───────────────────────────────────────────────────────────────
107 Controls for Overlay1 Boolean
108 keyboard overlays Overlay2 Boolean
109 ───────────────────────────────────────────────────────────────
110 Controls for using MouseKeys Boolean
111 the mouse from the MouseKeysAccel Boolean
112 keyboard
113 ───────────────────────────────────────────────────────────────
114 AccessXFeedback Boolean
115 Controls for better AccessXKeys Boolean
116 keyboard access by AccessXTimeout Boolean
117 physically impaired BounceKeys Boolean
118 persons SlowKeys Boolean
119 StickyKeys Boolean
120 ───────────────────────────────────────────────────────────────
121 GroupsWrap No
122 Controls for general IgnoreGroupLock Boolean
123 keyboard mapping IgnoreLockMods No
124 InternalMods No
125 ───────────────────────────────────────────────────────────────
126 The individual categories and controls are described first, together
129 with functions for manipulating them.
130
132 The KeySymMapRec structure is defined as follows:
133 #define XkbNumKbdGroups 4
135 #define XkbMaxKbdGroup (XkbNumKbdGroups-1)
136 typedef struct { /∗ map to keysyms for a single keycode
138 */
139 unsigned char kt_index[XkbNumKbdGroups]; /∗ key type index for
140 each group */
141 unsigned char group_info; /∗ # of groups and out of range group
142 handling */
143 unsigned char width; /∗ max # of shift levels for key */
144 unsigned short offset; /∗ index to keysym table in syms array
145 */
146 } XkbSymMapRec, *XkbSymMapPtr;
147 The XkbControlsRec structure is defined as follows:
150 #define XkbMaxLegalKeyCode 255
152 #define XkbPerKeyBitArraySize ((XkbMaxLegalKeyCode+1)/8)
153 typedef struct {
156 unsigned char mk_dflt_btn; /∗ default button for keyboard driven
157 mouse */
158 unsigned char num_groups; /∗ number of keyboard groups */
159 unsigned char groups_wrap; /∗ how to wrap out-of-bounds groups */
160 XkbModsRec internal; /∗ defines server internal modifiers
161 */
162 XkbModsRec ignore_lock; /∗ modifiers to ignore when checking
163 for grab */
164 unsigned int enabled_ctrls; /∗ 1 bit => corresponding boolean
165 control enabled */
166 unsigned short repeat_delay; /∗ ms delay until first repeat */
167 unsigned short repeat_interval; /∗ ms delay between repeats */
168 unsigned short slow_keys_delay; /∗ ms minimum time key must be down to
169 be ok */
170 unsigned short debounce_delay; /∗ ms delay before key reactivated */
171 unsigned short mk_delay; /∗ ms delay to second mouse motion
172 event */
173 unsigned short mk_interval; /∗ ms delay between repeat mouse
174 events */
175 unsigned short mk_time_to_max; /∗ # intervals until constant mouse
176 move */
177 unsigned short mk_max_speed; /∗ multiplier for maximum mouse speed
178 */
179 short mk_curve; /∗ determines mouse move curve type */
180 unsigned short ax_options; /∗ 1 bit => Access X option enabled */
181 unsigned short ax_timeout; /∗ seconds until Access X disabled */
182 unsigned short axt_opts_mask; /∗ 1 bit => options to reset on Access
183 X timeout */
184 unsigned short axt_opts_values; /∗ 1 bit => turn option on, 0=> off */
185 unsigned int axt_ctrls_mask; /∗ which bits in enabled_ctrls to
186 modify */
187 unsigned int axt_ctrls_values; /∗ values for new bits in
188 enabled_ctrls */
189 unsigned char per_key_repeat[XkbPerKeyBitArraySize]; /∗ per key auto
190 repeat */
191 } XkbControlsRec, *XkbControlsPtr;
192 The XkbControlsRec structure is defined as follows:
194 #define XkbMaxLegalKeyCode 255
196 #define XkbPerKeyBitArraySize ((XkbMaxLegalKeyCode+1)/8)
197 typedef struct {
200 unsigned char mk_dflt_btn; /∗ default button for keyboard driven
201 mouse */
202 unsigned char num_groups; /∗ number of keyboard groups */
203 unsigned char groups_wrap; /∗ how to wrap out-of-bounds groups */
204 XkbModsRec internal; /∗ defines server internal modifiers
205 */
206 XkbModsRec ignore_lock; /∗ modifiers to ignore when checking
207 for grab */
208 unsigned int enabled_ctrls; /∗ 1 bit => corresponding boolean
209 control enabled */
210 unsigned short repeat_delay; /∗ ms delay until first repeat */
211 unsigned short repeat_interval; /∗ ms delay between repeats */
212 unsigned short slow_keys_delay; /∗ ms minimum time key must be down to
213 be ok */
214 unsigned short debounce_delay; /∗ ms delay before key reactivated */
215 unsigned short mk_delay; /∗ ms delay to second mouse motion
216 event */
217 unsigned short mk_interval; /∗ ms delay between repeat mouse
218 events */
219 unsigned short mk_time_to_max; /∗ # intervals until constant mouse
220 move */
221 unsigned short mk_max_speed; /∗ multiplier for maximum mouse speed
222 */
223 short mk_curve; /∗ determines mouse move curve type */
224 unsigned short ax_options; /∗ 1 bit => Access X option enabled */
225 unsigned short ax_timeout; /∗ seconds until Access X disabled */
226 unsigned short axt_opts_mask; /∗ 1 bit => options to reset on Access
227 X timeout */
228 unsigned short axt_opts_values; /∗ 1 bit => turn option on, 0=> off */
229 unsigned int axt_ctrls_mask; /∗ which bits in enabled_ctrls to
230 modify */
231 unsigned int axt_ctrls_values; /∗ values for new bits in
232 enabled_ctrls */
233 unsigned char per_key_repeat[XkbPerKeyBitArraySize]; /∗ per key auto
234 repeat */
235 } XkbControlsRec, *XkbControlsPtr;
236
238 XkbChangeTypesOfKey(3), XkbKeyGroupInfo(3), XkbOutOfRangeGroupInfo.(3)
239X Version 11 libX11 1.6.12 XkbKeyNumGroups(3)