XkbSetAccessXTimeout(3) XKB FUNCTIONS XkbSetAccessXTimeout(3)
NAME
XkbSetAccessXTimeout - Configures the AccessXTimeout options for a key-
board device
SYNOPSIS
Bool XkbSetAccessXTimeout (Display *display, unsigned int device_spec,
unsigned short timeout, unsigned int ctrls_mask, unsigned int
ctrls_values, unsigned short opts_mask, unsigned short opts_val-
ues);
ARGUMENTS
display
connection to X server
device_spec
device to configure, or XkbUseCoreKbd
timeout
seconds idle until AccessXTimeout occurs
ctrls_mask
boolean controls to modify
ctrls_values
new bits for controls selected by ctrls_mask
opts_mask
ax_options to change
opts_values
new bits for ax_options selected by opts_mask
DESCRIPTION
In environments where computers are shared, features such as SlowKeys
present a problem: if SlowKeys is on, the keyboard can appear to be un-
responsive because keys are not accepted until they are held for a cer-
tain period of time. To help solve this problem, Xkb provides an Ac-
cessXTimeout control to automatically change the enabled/disabled state
of any boolean controls and to change the value of the AccessXKeys and
AccessXFeedback control attributes if the keyboard is idle for a speci-
fied period of time.
When a timeout as specified by AccessXTimeout occurs and a control is
consequently modified, Xkb generates an XkbControlsNotify event. For
more information on XkbControlsNotify events.
timeout specifies the number of seconds the keyboard must be idle be-
fore the controls are modified. ctrls_mask specifies what controls are
to be enabled or disabled, and ctrls_values specifies whether those
controls are to be enabled or disabled. The bit values correspond to
those for enabling and disabling boolean controls using XkbChangeEn-
abledControls.
The opts_mask field specifies which attributes of the AccessXKeys and
AccessXFeedback controls are to be changed, and opts_values specifies
the new values for those options. The bit values correspond to those
for the ax_options field of an XkbDescRec.
XkbSetAccessXTimeout sends a request to configure the AccessXTimeout
control to the server. It does not wait for a reply, and normally re-
turns True. If a compatible version of the Xkb extension is not avail-
able in the server, XkbSetAccessXTimeout returns False.
RETURN VALUES
True The XkbSetAccessXTimeout function returns True when a
compatible version of the Xkb extension is available in
the server.
False The XkbSetAccessXTimeout function returns False when a
compatible version of the Xkb extension is not available
in the server.
STRUCTURES
The complete description of an Xkb keyboard is given by an XkbDescRec.
The component structures in the XkbDescRec represent the major Xkb com-
ponents.
typedef struct {
struct _XDisplay * display; /* connection to X server */
unsigned short flags; /* private to Xkb, do not modify */
unsigned short device_spec; /* device of interest */
KeyCode min_key_code; /* minimum keycode for device */
KeyCode max_key_code; /* maximum keycode for device */
XkbControlsPtr ctrls; /* controls */
XkbServerMapPtr server; /* server keymap */
XkbClientMapPtr map; /* client keymap */
XkbIndicatorPtr indicators; /* indicator map */
XkbNamesPtr names; /* names for all components */
XkbCompatMapPtr compat; /* compatibility map */
XkbGeometryPtr geom; /* physical geometry of keyboard */
} XkbDescRec, *XkbDescPtr;
The display field points to an X display structure. The flags field is
private to the library: modifying flags may yield unpredictable re-
sults. The device_spec field specifies the device identifier of the
keyboard input device, or XkbUseCoreKeyboard, which specifies the core
keyboard device. The min_key_code and max_key_code fields specify the
least and greatest keycode that can be returned by the keyboard.
Each structure component has a corresponding mask bit that is used in
function calls to indicate that the structure should be manipulated in
some manner, such as allocating it or freeing it. These masks and their
relationships to the fields in the XkbDescRec are shown in Table 1.
Table 1 Mask Bits for XkbDescRec
──────────────────────────────────────────────────
Mask Bit XkbDescRec Field Value
──────────────────────────────────────────────────
XkbControlsMask ctrls (1L<<0)
XkbServerMapMask server (1L<<1)
XkbIClientMapMask map (1L<<2)
XkbIndicatorMapMask indicators (1L<<3)
XkbNamesMask names (1L<<4)
XkbCompatMapMask compat (1L<<5)
XkbGeometryMask geom (1L<<6)
XkbAllComponentsMask All Fields (0x7f)
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
XkbChangeEnabledControls(3)
X Version 11 libX11 1.8.4 XkbSetAccessXTimeout(3)
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