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.ds tk X Toolkit
.ds xT X Toolkit Intrinsics \- C Language Interface
.ds xI Intrinsics
.ds xW X Toolkit Athena Widgets \- C Language Interface
.ds xL Xlib \- C Language X Interface
.ds xC Inter-Client Communication Conventions Manual
.ds Rn 3
.ds Vn 2.2
.hw XtAdd-Callback XtAdd-Callbacks XtRemove-Callback
.hw XtRemove-Callbacks XtRemove-All-Callbacks wid-get
.na
.TH XtAddCallback 3 "libXt 1.2.0" "X Version 11" "XT FUNCTIONS"
.SH NAME
XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemoveCallbacks, XtRemoveAllCallbacks \- add and remove callback procedures
.SH SYNTAX
#include <X11/Intrinsic.h>
.HP
void XtAddCallback(Widget \fIw\fP, const char *\fIcallback_name\fP, XtCallbackProc
\fIcallback\fP, XtPointer \fIclient_data\fP);
.HP
void XtAddCallbacks(Widget \fIw\fP, const char *\fIcallback_name\fP, XtCallbackList
\fIcallbacks\fP);
.HP
void XtRemoveCallback(Widget \fIw\fP, const char *\fIcallback_name\fP,
XtCallbackProc \fIcallback\fP, XtPointer \fIclient_data\fP);
.HP
void XtRemoveCallbacks(Widget \fIw\fP, const char *\fIcallback_name\fP,
XtCallbackList \fIcallbacks\fP);
.HP
void XtRemoveAllCallbacks(Widget \fIw\fP, const char *\fIcallback_name\fP);
.SH ARGUMENTS
.IP \fIcallback\fP 1i
Specifies the callback procedure.
.IP \fIcallbacks\fP 1i
Specifies the null-terminated list of callback procedures and corresponding
client data.
.IP \fIcallback_name\fP 1i
Specifies the callback list to which the procedure is to be appended or
deleted.
.IP \fIclient_data\fP 1i
Specifies the argument that is to be passed to the specified procedure
when it is invoked by XtCallbacks or NULL,
or the client data to match on the registered callback procedures.
.IP \fIw\fP 1i
Specifies the widget.
.SH DESCRIPTION
The
.B XtAddCallback
function adds the specified callback procedure to the specified widget's
callback list.
.LP
The
.B XtAddCallbacks
add the specified list of callbacks to the specified widget's callback list.
.LP
The
.B XtRemoveCallback
function removes a callback only if both the procedure and the client
data match.
.LP
The
.B XtRemoveCallbacks
function removes the specified callback procedures from the specified
widget's callback list.
.LP
The
.B XtRemoveAllCallbacks
function removes all the callback procedures from the specified
widget's callback list.
.SH "SEE ALSO"
XtCallCallbacks(3)
.br
\fI\*(xT\fP
.br
\fI\*(xL\fP