XkbNoteControlsChanges(3) XKB FUNCTIONS XkbNoteControlsChanges(3)
NAME
XkbNoteControlsChanges - Notes the changes in a changes structure when a
client receives an XkbControlsNotify event
SYNOPSIS
void XkbNoteControlsChanges (XkbControlsChangesPtr changes, XkbControl-
sNotifyEvent *new, unsigned int wanted);
ARGUMENTS
changes
records changes indicated by new
new tells which things have changed
wanted tells which parts of new to record in changes
DESCRIPTION
Whenever a field in the controls structure changes in the server's key-
board description, the server sends an XkbControlsNotify event to all
interested clients.To receive XkbControlsNotify events under all possi-
ble conditions, use XkbSelectEvents and pass XkbControlsNotifyMask in
both bits_to_change and values_for_bits.
To receive XkbControlsNotify events only under certain conditions, use
XkbSelectEventDetails using XkbControlsNotify as the event_type and
specifying the desired state changes in bits_to_change and val-
ues_for_bits using mask bits from Table 1.
Table 1 shows the actual values for the individual mask bits used to se-
lect 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 en-
abled or disabled.
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)
The changed_ctrls field specifies the controls components that have
changed and consists of bits taken from the masks defined in Table 1
with "ok" in the changed_ctrls column.
The controls currently enabled in the server are reported in the en-
abled_ctrls field. If any controls were just enabled or disabled (that
is, the contents of the enabled_ctrls field changed), they are flagged
in the enabled_ctrl_changes field. The valid bits for these fields are
the masks listed in Table 1 with "ok" in the enabled_ctrls column. The
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 key-
board mapping changes.
If the change was caused by a request from a client, the keycode and
event_type fields are set to zero and the req_major and req_minor fields
identify the request. The req_major value is the same as the major ex-
tension opcode. Otherwise, event_type is set to the type of event that
caused the change (one of KeyPress, KeyRelease, DeviceKeyPress, De-
viceKeyRelease, ButtonPress or ButtonRelease), and req_major and req_mi-
nor are undefined. If event_type is KeyPress, KeyRelease, DeviceKey-
Press, or DeviceKeyRelease, the keycode field is set to the key that
caused the change. If event_type is ButtonPress or ButtonRelease, key-
code contains the button number.
When a client receives an XkbControlsNotify event, it can note the
changes in a changes structure using XkbNoteControlsChanges.
The wanted parameter is a bitwise inclusive OR of bits taken from the
set of masks specified in Table 1 with "ok" in the changed_ctrls column.
XkbNoteControlsChanges copies any changes reported in new and specified
in wanted into the changes record specified by old.
STRUCTURES
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;
SEE ALSO
XkbSelectEventDetails(3), XkbSelectEvents(3)
X Version 11 libX11 1.8.12 XkbNoteControlsChanges(3)
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