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XtAddCallback(3) XT FUNCTIONS XtAddCallback(3)
NAME
XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemoveCallbacks,
XtRemoveAllCallbacks - add and remove callback procedures
SYNTAX
#include <X11/Intrinsic.h>
void XtAddCallback(Widget w, const char *callback_name, XtCallbackProc
callback, XtPointer client_data);
void XtAddCallbacks(Widget w, const char *callback_name, XtCallbackList
callbacks);
void XtRemoveCallback(Widget w, const char *callback_name,
XtCallbackProc callback, XtPointer client_data);
void XtRemoveCallbacks(Widget w, const char *callback_name,
XtCallbackList callbacks);
void XtRemoveAllCallbacks(Widget w, const char *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