1XkbSelectEventDetails(3)         XKB FUNCTIONS        XkbSelectEventDetails(3)
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NAME

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

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

16       display
17              connection to the X server
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19       device_spec
20              device ID, or XkbUseCoreKbd
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22       event_type
23              Xkb event type of interest
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25       bits_to_change
26              determines events to be selected / deselected
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28       values_for_bits
29              1=>select, 0->deselect; for events in bits_to_change
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DESCRIPTION

32       Xkb  events  are  selected using an event mask, much the same as normal
33       core X events are selected. However, unlike selecting  core  X  events,
34       where  you must specify the selection status (on or off) for all possi‐
35       ble event types whenever you wish to change the selection criteria  for
36       any one event, Xkb allows you to restrict the specification to only the
37       event types you wish to change. This means that  you  do  not  need  to
38       remember  the  event  selection values for all possible types each time
39       you want to change one of them.
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41       Many Xkb event types are  generated  under  several  different  circum‐
42       stances. When selecting to receive an Xkb event, you may specify either
43       that you want it delivered under all circumstances, or that you want it
44       delivered only for a subset of the possible circumstances.
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46       You  can  also deselect an event type that was previously selected for,
47       using the same granularity.
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49       Xkb provides two functions to  select  and  deselect  delivery  of  Xkb
50       events.   XkbSelectEvents  allows you to select or deselect delivery of
51       more than one Xkb event type at  once.  Events  selected  using  XkbSe‐
52       lectEvents  are  delivered to your program under all circumstances that
53       generate the events.  To restrict delivery of an event to a  subset  of
54       the conditions under which it occurs, use XkbSelectEventDetails. XkbSe‐
55       lectEventDetails only allows you to change the selection conditions for
56       a  single  event  at a time, but it provides a means of fine-tuning the
57       conditions under which the event is delivered.
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59       To select or deselect for a specific Xkb  event  and  optionally  place
60       conditions on when events of that type are reported to your client, use
61       XkbSelectEventDetails.  This allows you to exercise a finer granularity
62       of control over delivery of Xkb events with XkbSelectEvents.
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64       While  XkbSelectEvents  allows  multiple  events to be selected, XkbSe‐
65       lectEventDetails changes the selection criteria for a  single  type  of
66       Xkb event. The interpretation of the bits_to_change and values_for_bits
67       masks depends on the event type in question.
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69       XkbSelectEventDetails changes the Xkb event selection mask for the key‐
70       board   specified  by  device_spec  and  the  Xkb  event  specified  by
71       event_type.  To turn on event selection for an event  detail,  set  the
72       bit  for  the detail in the bits_to_change parameter and set the corre‐
73       sponding bit in the values_for_bits parameter. To turn off event detail
74       selection   for   a   detail,  set  the  bit  for  the  detail  in  the
75       bits_to_change parameter and do not set the corresponding  bit  in  the
76       values_for_bits parameter.
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78       If  an  invalid  event  type  is  specified,  a BadValue protocol error
79       results. If a bit is not set in the bits_to_change parameter,  but  the
80       corresponding  bit  is set in the values_for_bits parameter, a BadMatch
81       protocol error results. If an  undefined  bit  is  set  in  either  the
82       bits_to_change  or  the  values_for_bits parameter, a BadValue protocol
83       error results.
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85       For each type of Xkb event, the legal event details that you can  spec‐
86       ify  in  the  XkbSelectEventDetails  request are listed in the chapters
87       that describe each event in detail.
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DIAGNOSTICS

90       BadMatch       A compatible version of Xkb was  not  available  in  the
91                      server or an argument has correct type and range, but is
92                      otherwise invalid
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94       BadValue       An argument is out of range
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SEE ALSO

97       XkbSelectEvents(3), XkbUseCoreKbd(3)
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101X Version 11                     libX11 1.3.4         XkbSelectEventDetails(3)
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