1XtAddCallback(3)                 XT FUNCTIONS                 XtAddCallback(3)
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NAME

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

10       #include <X11/Intrinsic.h>
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12       void XtAddCallback(Widget w, const char *callback_name, XtCallbackProc
13              callback, XtPointer client_data);
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15       void XtAddCallbacks(Widget w, const char *callback_name, XtCallbackList
16              callbacks);
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18       void XtRemoveCallback(Widget w, const char *callback_name, XtCallback‐
19              Proc callback, XtPointer client_data);
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21       void XtRemoveCallbacks(Widget w, const char *callback_name, XtCallback‐
22              List callbacks);
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24       void XtRemoveAllCallbacks(Widget w, const char *callback_name);
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ARGUMENTS

27       callback  Specifies the callback procedure.
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29       callbacks Specifies the null-terminated list of callback procedures and
30                 corresponding client data.
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32       callback_name
33                 Specifies the callback list to which the procedure is to be
34                 appended or deleted.
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36       client_data
37                 Specifies the argument that is to be passed to the specified
38                 procedure when it is invoked by XtCallbacks or NULL, or the
39                 client data to match on the registered callback procedures.
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41       w         Specifies the widget.
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DESCRIPTION

44       The XtAddCallback function adds the specified callback procedure to the
45       specified widget's callback list.
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47       The XtAddCallbacks add the specified list of callbacks to the specified
48       widget's callback list.
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50       The XtRemoveCallback function removes a callback only if both the pro‐
51       cedure and the client data match.
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53       The XtRemoveCallbacks function removes the specified callback proce‐
54       dures from the specified widget's callback list.
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56       The XtRemoveAllCallbacks function removes all the callback procedures
57       from the specified widget's callback list.
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SEE ALSO

60       XtCallCallbacks(3)
61       X Toolkit Intrinsics - C Language Interface
62       Xlib - C Language X Interface
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66X Version 11                      libXt 1.2.1                 XtAddCallback(3)
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