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//# PCRefreshEvent.h: class which stores PixelCanvas refresh event information
//# Copyright (C) 1993,1994,1995,1996,1999,2000
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
namespace casa { //# NAMESPACE CASA - BEGIN
class PixelCanvas;
// <summary>
// Class which stores PixelCanvas refresh event information.
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
// <etymology>
// "PCRefreshEvent" is a contraction and concatenation of "PixelCanvas",
// "Refresh" and "Event", and describes refresh events occuring on
// PixelCanvases.
// </etymology>
// <prerequisite>
// <li> <linkto class=PixelCanvasEvent>PixelCanvasEvent</linkto>
// </prerequisite>
// <synopsis>
// This class adds to the information stored in the <linkto
// class=PixelCanvasEvent>PixelCanvasEvent</linkto> class. It adds
// information describing the reason a refresh event has occurred. An
// object of this class is generated and distributed to all registered
// PCRefreshEvent handlers whenever a refresh is explicitly or