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       XtPopdown, XtCallbackPopdown - unmap a pop-up


       void XtPopdown(Widget popup_shell);

       void XtCallbackPopdown(Widget w, XtPointer client_data, XtPointer

       void MenuPopdown(String shell_name);


       call_data Specifies the callback data, which is not used by this

                 Specifies a pointer to the XtPopdownID structure.

                 Specifies the widget shell to pop down.

                 Specifies the name of the widget shell to pop down.

       w         Specifies the widget.


       The XtPopdown function performs the following:

       ·    Calls XtCheckSubclass to ensure popup_shell is a subclass of

       ·    Checks that popup_shell is currently popped_up; otherwise, it
            generates an error.

       ·    Unmaps popup_shell’s window.

       ·    If popup_shell’s grab_kind is either XtGrabNonexclusive or
            XtGrabExclusive, it calls XtRemoveGrab.

       ·    Sets pop-up shell’s popped_up field to False.

       ·    Calls the callback procedures on the shell’s popdown_callback

       The XtCallbackPopdown function casts the client data parameter to an
       XtPopdownID pointer:

       typedef struct {
            Widget shell_widget;
            Widget enable_widget;
       } XtPopdownIDRec, *XtPopdownID;
       XtCallbackPopdown calls XtPopdown with the specified shell_widget and
       then calls XtSetSensitive to resensitize the enable_widget.

       If a shell name is not given, MenuPopdown calls XtPopdown with the
       widget for which the translation is specified.  If a shell_name is
       specified in the translation table, MenuPopdown tries to find the shell
       by looking up the widget tree starting at the parent of the widget in
       which it is invoked.  If it finds a shell with the specified name in
       the pop-up children of that parent, it pops down the shell; otherwise,
       it moves up the parent chain as needed.  If MenuPopdown gets to the
       application top-level shell widget and cannot find a matching shell, it
       generates an error.


       XtCreatePopupShell(3Xt), XtPopup(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface