XtCallCallbacks(3) XT FUNCTIONS XtCallCallbacks(3)

NAME

XtCallCallbacks, XtCallCallbackList, XtHasCallbacks - process
callbacks

SYNTAX

void XtCallCallbacks(Widget w, String callback_name, XtPointer
call_data);

void XtCallCallbackList(Widget w, XtCallbackList callbacks, XtPointer
call_data);

typedef enum {XtCallbackNoList, XtCallbackHasNone, XtCallbackHasSome}
XtCallbackStatus;

XtCallbackStatus XtHasCallbacks(Widget w, String callback_name);

ARGUMENTS

callback_name
Specifies the callback list to be executed or checked.

call_data Specifies a callback-list specific data value to pass to
each of the callback procedure in the list.

callbacks Specifies the callback list to be executed.

w Specifies the widget.

DESCRIPTION

The XtCallCallbacks function calls each procedure that is registered
in the specified widget's callback list.

If callbacks is not NULL, XtCallCallbackList calls each of the
callback procedures in the list, passing client data and call_data.
The callbacks parameter must specify the contents of a widget or
object resource declared with representation type XtRCallback.

The XtHasCallbacks function first checks to see if the widget has a
callback list identified by callback_name. If the callback list does
not exist, XtHasCallbacks returns XtCallbackNoList. If the callback
list exists but is empty, it returns XtCallbackHasNone. If the
callback list exists and has at least one callback registered, it
returns XtCallbackHasSome.

SEE ALSO

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

X Version 11 libXt 1.1.5 XtCallCallbacks(3)