XtCallbackNone man page on HP-UX

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XtCallbackNone()					      XtCallbackNone()

Name
  XtCallbackNone - callback function to pop up a widget.

Synopsis
  void XtCallbackNone(w, client_data, call_data)
	 Widget w;
	 XtPointer client_data;
	 XtPointer call_data;

Inputs
  w	    Specifies the widget.

  client_data
	    Specifies the popup shell.

  call_data Specifies the callback data, which is not used by this proce‐
	    dure.

Description
  XtCallbackNone()  calls  XtPopup()  on  the  widget	passed	 in   the
  client_data  argument	 with grab_mode set to XtGrabNone.  Then it calls
  XtSetSensitive() on w to make that widget insensitive.

  XtCallbackNone() is a convenience procedure designed to  be  registered
  on  a widget's callback list (which is why it has a third, unused argu‐
  ment).  The widget to be popped up should be registered as  client_data
  for  the  callback.	The  reason that this callback makes its invoking
  widget insensitive is so that the user  cannot  request  to  popup  the
  shell again while it is already up.

Usage
  To popup a shell with an exclusive grab or with no grab at all, you can
  use XtCallbackExclusive() or XtCallbackNone().  To popdown a shell from
  a callback, use XtCallbackPopdown().

  Note	that  this  function does not attempt to place the popup shell at
  any particular location, and for that reason may not be appropriate  in
  many circumstances.

  It is also possible to pop up a shell with the XtMenuPopup action.

Example
  To arrange for the shell pshell to be popped up when the user clicks on
  the button widget button, you would use code like the following:

	 XtAddCallback(button,XtNcallback,XtCallbackNone,pshell);

  A companion example is presented on the  XtCallbackPopdown()	reference
  page.

See Also
  XtCallbackExclusive(1), XtCallbackNonexclusive(1), XtCallbackPop‐
  down(1), XtMenuPopdown(1), XtMenuPopup(1), XtPopdown(1), XtPopup(1),
  XtSetSensitive(1).

Xt - Pop Ups						      XtCallbackNone()
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