XkbSelectEventDetails(3) XKB FUNCTIONS XkbSelectEventDetails(3)

NAME

XkbSelectEventDetails - Selects or deselects for a specific Xkb
event and optionally places conditions on when events of that type
are reported to your client

SYNOPSIS

Bool XkbSelectEventDetails (Display *display, unsigned int
device_spec, unsigned int event_type, unsigned long int
bits_to_change, unsigned long int values_for_bits);

ARGUMENTS

display
connection to the X server

device_spec
device ID, or XkbUseCoreKbd

event_type
Xkb event type of interest

bits_to_change
determines events to be selected / deselected

values_for_bits
1=>select, 0->deselect; for events in bits_to_change

DESCRIPTION

Xkb events are selected using an event mask, much the same as normal
core X events are selected. However, unlike selecting core X events,
where you must specify the selection status (on or off) for all
possible event types whenever you wish to change the selection
criteria for any one event, Xkb allows you to restrict the
specification to only the event types you wish to change. This means
that you do not need to remember the event selection values for all
possible types each time you want to change one of them.

Many Xkb event types are generated under several different
circumstances. When selecting to receive an Xkb event, you may
specify either that you want it delivered under all circumstances, or
that you want it delivered only for a subset of the possible
circumstances.

You can also deselect an event type that was previously selected for,
using the same granularity.

Xkb provides two functions to select and deselect delivery of Xkb
events. XkbSelectEvents allows you to select or deselect delivery of
more than one Xkb event type at once. Events selected using
XkbSelectEvents are delivered to your program under all circumstances
that generate the events. To restrict delivery of an event to a
subset of the conditions under which it occurs, use
XkbSelectEventDetails. XkbSelectEventDetails only allows you to
change the selection conditions for a single event at a time, but it
provides a means of fine-tuning the conditions under which the event
is delivered.

To select or deselect for a specific Xkb event and optionally place
conditions on when events of that type are reported to your client,
use XkbSelectEventDetails. This allows you to exercise a finer
granularity of control over delivery of Xkb events with
XkbSelectEvents.

While XkbSelectEvents allows multiple events to be selected,
XkbSelectEventDetails changes the selection criteria for a single
type of Xkb event. The interpretation of the bits_to_change and
values_for_bits masks depends on the event type in question.

XkbSelectEventDetails changes the Xkb event selection mask for the
keyboard specified by device_spec and the Xkb event specified by
event_type. To turn on event selection for an event detail, set the
bit for the detail in the bits_to_change parameter and set the
corresponding bit in the values_for_bits parameter. To turn off event
detail selection for a detail, set the bit for the detail in the
bits_to_change parameter and do not set the corresponding bit in the
values_for_bits parameter.

If an invalid event type is specified, a BadValue protocol error
results. If a bit is not set in the bits_to_change parameter, but the
corresponding bit is set in the values_for_bits parameter, a BadMatch
protocol error results. If an undefined bit is set in either the
bits_to_change or the values_for_bits parameter, a BadValue protocol
error results.

For each type of Xkb event, the legal event details that you can
specify in the XkbSelectEventDetails request are listed in the
chapters that describe each event in detail.

DIAGNOSTICS

BadMatch A compatible version of Xkb was not available in the
server or an argument has correct type and range, but
is otherwise invalid

BadValue An argument is out of range

SEE ALSO

XkbSelectEvents(3), XkbUseCoreKbd(3)

X Version 11 libX11 1.8.10 XkbSelectEventDetails(3)