XtAddCallback(3) XT FUNCTIONS XtAddCallback(3)

NAME

XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemoveCallbacks,
XtRemoveAllCallbacks - add and remove callback procedures

SYNTAX

void XtAddCallback(Widget w, String callback_name, XtCallbackProc
callback, XtPointer client_data);

void XtAddCallbacks(Widget w, String callback_name, XtCallbackList
callbacks);

void XtRemoveCallback(Widget w, String callback_name, XtCallbackProc
callback, XtPointer client_data);

void XtRemoveCallbacks(Widget w, String callback_name, XtCallbackList
callbacks);

void XtRemoveAllCallbacks(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 procedure 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 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 callback
procedures from the specified widget's callback list.

The XtRemoveAllCallbacks function removes all the callback procedures
from the specified widget's callback list.

SEE ALSO

XtCallCallbacks(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface

X Version 11 libXt 1.1.5 XtAddCallback(3)