path: root/man/XSelectInput.man

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.ds xT X Toolkit Intrinsics \- C Language Interface
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.TH XSelectInput __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
.SH NAME
XSelectInput \- select input events
.SH SYNTAX
.HP
int XSelectInput\^(\^Display *\fIdisplay\fP\^, Window \fIw\fP\^, long
\fIevent_mask\fP\^); 
.SH ARGUMENTS
.IP \fIdisplay\fP 1i
Specifies the connection to the X server.
.IP \fIevent_mask\fP 1i
Specifies the event mask.
.ds Wi whose events you are interested in
.IP \fIw\fP 1i
Specifies the window \*(Wi.
.SH DESCRIPTION
The
.ZN XSelectInput
function requests that the X server report the events associated with the 
specified event mask.
Initially, X will not report any of these events.
Events are reported relative to a window.
If a window is not interested in a device event, it usually propagates to
the closest ancestor that is interested,
unless the do_not_propagate mask prohibits it.
.IN "Event" "propagation"
.LP
Setting the event-mask attribute of a window overrides any previous call
for the same window but not for other clients.
Multiple clients can select for the same events on the same window
with the following restrictions:
.IP \(bu 5
Multiple clients can select events on the same window because their event masks
are disjoint.
When the X server generates an event, it reports it
to all interested clients.
.IP \(bu 5
Only one client at a time can select
.ZN CirculateRequest ,
.ZN ConfigureRequest ,
or
.ZN MapRequest
events, which are associated with
the event mask
.ZN SubstructureRedirectMask . 
.IP \(bu 5
Only one client at a time can select
a
.ZN ResizeRequest
event, which is associated with
the event mask
.ZN ResizeRedirectMask . 
.IP \(bu 5
Only one client at a time can select a 
.ZN ButtonPress 
event, which is associated with
the event mask
.ZN ButtonPressMask .
.LP
The server reports the event to all interested clients.
.LP
.ZN XSelectInput
can generate a
.ZN BadWindow 
error.
.SH DIAGNOSTICS
.TP 1i
.ZN BadWindow
A value for a Window argument does not name a defined Window.
.SH "SEE ALSO"
\fI\*(xL\fP