XtPopup(3Xt)                  SDK X11 R4.11MU05                 XtPopup(3Xt)


NAME
       XtPopup, XtCallbackNone, XtCallbackNonexclusive, XtCallbackExclusive,
       MenuPopup - map a pop-up

SYNTAX
       void XtPopup(popupshell, grabkind)
             Widget popupshell;
             XtGrabKind grabkind;

       void XtCallbackNone(w, clientdata, calldata)
             Widget w;
             XtPointer clientdata;
             XtPointer calldata;

       void XtCallbackNonexclusive(w, clientdata, calldata)
             Widget w;
             XtPointer clientdata;
             XtPointer calldata;

       void XtCallbackExclusive(w, clientdata, calldata)
             Widget w;
             XtPointer clientdata;
             XtPointer calldata;

       void MenuPopup(shellname)
             String shellname;

ARGUMENTS
       calldata Specifies the callback data, which is not used by this
                 procedure.

       clientdata
                 Specifies the pop-up shell.

       grabkind Specifies the way in which user events should be
                 constrained.

       popupshell
                 Specifies the widget shell.

       w         Specifies the widget.

DESCRIPTION
       The XtPopup function performs the following:

       ·    Calls XtCheckSubclass to ensure popup_shell is a subclass of
            Shell.

       ·    Generates an error if the shell's popped_up field is already
            True.

       ·    Calls the callback procedures on the shell's popup_callback
            list.

       ·    Sets the shell popped_up field to True, the shell spring_loaded
            field to False, and the shell grab_kind field from grab_kind.

       ·    If the shell's create_popup_child field is non-NULL, XtPopup
            calls it with popup_shell as the parameter.

       ·    If grab_kind is either XtGrabNonexclusive or XtGrabExclusive, it
            calls:

       XtAddGrab(popup_shell, (grab_kind == XtGrabExclusive), False)

       ·    Calls XtRealizeWidget with popup_shell specified.

       ·    Calls XMapWindow with popup_shell specified.

       The XtCallbackNone, XtCallbackNonexclusive, and XtCallbackExclusive
       functions call XtPopup with the shell specified by the client data
       argument and grab_kind set as the name specifies.  XtCallbackNone,
       XtCallbackNonexclusive, and XtCallbackExclusive specify XtGrabNone,
       XtGrabNonexclusive, and XtGrabExclusive, respectively.  Each function
       then sets the widget that executed the callback list to be
       insensitive by using XtSetSensitive.  Using these functions in
       callbacks is not required.  In particular, an application must
       provide customized code for callbacks that create pop-up shells
       dynamically or that must do more than desensitizing the button.

       MenuPopup is known to the translation manager, which must perform
       special actions for spring-loaded pop-ups.  Calls to MenuPopup in a
       translation specification are mapped into calls to a nonexported
       action procedure, and the translation manager fills in parameters
       based on the event specified on the left-hand side of a translation.

       If MenuPopup is invoked on ButtonPress (possibly with modifiers), the
       translation manager pops up the shell with grab_kind set to
       XtGrabExclusive and spring_loaded set to True.  If MenuPopup is
       invoked on EnterWindow (possibly with modifiers), the translation
       manager pops up the shell with grab_kind set to XtGrabNonexclusive
       and spring_loaded set to False.  Otherwise, the translation manager
       generates an error.  When the widget is popped up, the following
       actions occur:

       ·    Calls XtCheckSubclass to ensure popup_shell is a subclass of
            Shell.

       ·    Generates an error if the shell's popped_up field is already
            True.

       ·    Calls the callback procedures on the shell's popup_callback
            list.

       ·    Sets the shell popped_up field to True and the shell grab_kind
            and spring_loaded fields appropriately.

       ·    If the shell's create_popup_child field is non-NULL, it is
            called with popup_shell as the parameter.

       ·    Calls:

       XtAddGrab(popup_shell, (grab_kind == XtGrabExclusive), spring_loaded)

       ·    Calls XtRealizeWidget with popup_shell specified.

       ·    Calls XMapWindow with popup_shell specified.

       (Note that these actions are the same as those for XtPopup.)
       MenuPopup tries to find the shell by searching 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 up the shell with the appropriate parameters.
       Otherwise, it moves up the parent chain as needed.  If MenuPopup gets
       to the application widget and cannot find a matching shell, it
       generates an error.

SEE ALSO
       XtCreatePopupShell(3Xt), XtPopdown(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface


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