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//# PCMotionEH.h: PixelCanvas motion event handler
//# 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>
// PixelCanvas Event Handler for managing pointer motion events
// </summary>
//
// <prerequisite>
// <li> <linkto class="PCMotionEvent">PCMotionEvent</linkto>
// </prerequisite>
//
// <etymology>
// PCMotionEH : PixelCanvas Motion Event Handler
// </etymology>
//
// <synopsis>
// Designed for derivation, this class is the base class which
// is communicated to when the pointer moves across the
// display window. The application programmer should derive
// from this class, add any data fields needed, and override
// operator () to handle mouse motion.
// </synopsis>
//
// <motivation>
// Wanted a standard method for event management. It was felt
// that a class might be more flexible than callback methods
// because a class can contain data and other functions as
// well.
// </motivation>
//
// <example>
// see the <linkto class="WorldCanvas">WorldCanvas</linkto> code
// see the Display test directory
// </example>
//
class PCMotionEH {
public:
// Default Constructor Required
PCMotionEH();
// Default just prints the event to cout
virtual void operator ()(const PCMotionEvent & eh);
// Destructor
virtual ~PCMotionEH();
};
} //# NAMESPACE CASA - END