XtAddCallback(3Xt) XT FUNCTIONS XtAddCallback(3Xt)NAME
XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemove-
Callbacks, XtRemoveAllCallbacks - add and remove callback
procedures
SYNTAX
void XtAddCallback(w, callback_name, callback,
client_data)
Widget w;
String callback_name;
XtCallbackProc callback;
XtPointer client_data;
void XtAddCallbacks(w, callback_name, callbacks)
Widget w;
String callback_name;
XtCallbackList callbacks;
void XtRemoveCallback(w, callback_name, callback,
client_data)
Widget w;
String callback_name;
XtCallbackProc callback;
XtPointer client_data;
void XtRemoveCallbacks(w, callback_name, callbacks)
Widget w;
String callback_name;
XtCallbackList callbacks;
void XtRemoveAllCallbacks(w, callback_name)
Widget w;
String callback_name;
ARGUMENTS
callback Specifies the callback procedure.
callbacks Specifies the null-terminated list of callback
procedures and corresponding client data.
callback_name
Specifies the callback list to which the proce-
dure is to be appended or deleted.
client_data
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.
w Specifies the widget.
DESCRIPTION
The XtAddCallback function adds the specified callback
X Version 11 Release 6.4 1
XtAddCallback(3Xt) XT FUNCTIONS XtAddCallback(3Xt)
procedure to the specified widget's callback list.
The XtAddCallbacks add the specified list of callbacks to
the specified widget's callback list.
The XtRemoveCallback function removes a callback only if
both the procedure and the client data match.
The XtRemoveCallbacks function removes the specified call-
back procedures from the specified widget's callback list.
The XtRemoveAllCallbacks function removes all the callback
procedures from the specified widget's callback list.
SEE ALSOXtCallCallbacks(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 Release 6.4 2
