1XtCallCallbacks(3)               XT FUNCTIONS               XtCallCallbacks(3)
2
3
4

NAME

6       XtCallCallbacks, XtCallCallbackList, XtHasCallbacks - process callbacks
7

SYNTAX

9       void XtCallCallbacks(Widget w, String callback_name, XtPointer
10              call_data);
11
12       void XtCallCallbackList(Widget w, XtCallbackList callbacks, XtPointer
13              call_data);
14
15       typedef enum {XtCallbackNoList, XtCallbackHasNone, XtCallbackHasSome}
16       XtCallbackStatus;
17
18       XtCallbackStatus XtHasCallbacks(Widget w, String callback_name);
19

ARGUMENTS

21       callback_name
22                 Specifies the callback list to be executed or checked.
23
24       call_data Specifies a callback-list specific data value to pass to each
25                 of the callback procedure in the list.
26
27       callbacks Specifies the callback list to be executed.
28
29       w         Specifies the widget.
30

DESCRIPTION

32       The XtCallCallbacks function calls each procedure that is registered in
33       the specified widget's callback list.
34
35       If callbacks is not NULL, XtCallCallbackList calls each of the callback
36       procedures in the list, passing client data and call_data. The call‐
37       backs parameter must specify the contents of a widget or object
38       resource declared with representation type XtRCallback.
39
40       The XtHasCallbacks function first checks to see if the widget has a
41       callback list identified by callback_name.  If the callback list does
42       not exist, XtHasCallbacks returns XtCallbackNoList.  If the callback
43       list exists but is empty, it returns XtCallbackHasNone.  If the call‐
44       back list exists and has at least one callback registered, it returns
45       XtCallbackHasSome.
46

SEE ALSO

48       XtAddCallback(3)
49       X Toolkit Intrinsics - C Language Interface
50       Xlib - C Language X Interface
51
52
53
54X Version 11                      libXt 1.1.5               XtCallCallbacks(3)
Impressum