xtaddcallback(3x)
NAME
XtAddCallback, XtAddCallbacks, XtRemoveCallback, XtRemoveCallbacks,
XtRemoveAllCallbacks - add and remove callback procedures
SYNTAX
- void XtAddCallback(Widget w, String callback_name, XtCallbackProc call
- back, 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(3Xt)
X Toolkit Intrinsics - C Language Interface Xlib - C Language X Interface