XtPopup(3)							   XT FUNCTIONS 							XtPopup(3)

NAME

       XtPopup, XtPopupSpringLoaded, XtCallbackNone, XtCallbackNonexclusive, XtCallbackExclusive - map a pop-up

SYNTAX

       void XtPopup(Widget popup_shell, XtGrabKind grab_kind);

       void XtPopupSpringLoaded(Widget popup_shell);

       void XtCallbackNone(Widget w, XtPointer client_data, XtPointer call_data):

       void XtCallbackNonexclusive(Widget w, XtPointer client_data, XtPointer call_data);

       void XtCallbackExclusive(Widget w, XtPointer client_data, XtPointer call_data);

       void MenuPopup(String shell_name);

ARGUMENTS

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

       client_data
		 Specifies the pop-up shell.

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

       popup_shell
		 Specifies the widget shell.

       w	 Specifies the widget.

DESCRIPTION

       The XtPopup function performs the following:

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

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

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

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

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

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

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

       o    Calls XtRealizeWidget with popup_shell specified.

       o    Calls XMapWindow with popup_shell specified.

       The XtPopupSpringLoaded function performs exactly as XtPopup except that it sets the shell spring_loaded field to True and always calls
       XtAddGrab with exclusive True and spring_loaded True.

       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 insensi-
       tive 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 XtGrabEx-
       clusive 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:

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

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

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

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

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

       o    Calls:

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

       o    Calls XtRealizeWidget with popup_shell specified.

       o    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 applica-
       tion widget and cannot find a matching shell, it generates an error.

SEE ALSO

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

X Version 11							    libXt 1.1.3 							XtPopup(3)