XtCallbackNone

XtPopup(3Xt)			 XT FUNCTIONS			 XtPopup(3Xt)



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 pro-
		 cedure.

       client_data
		 Specifies the pop-up shell.

       grab_kind Specifies the way in which user events should be con-
		 strained.

       popup_shell
		 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 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 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 spe-
       cial 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:

       ·    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 start-
       ing 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 appli-
       cation 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



								 XtPopup(3Xt)