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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 cir-
cumstances, 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 gran-
ularity.
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 XkbSe-
lectEvents.
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 cor-
responding 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 cor-
responding 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 val-
ues_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 XkbSe-
lectEventDetails 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 1.6.7 XkbSelectEventDetails(3)
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On Apache
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