WedgeDD.h

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//# WedgeDD.h: Color Wedge DisplayData
//# Copyright (C) 2001,2002
//# 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
//#

#ifndef TRIALDISPLAY_WEDGEDD_H
#define TRIALDISPLAY_WEDGEDD_H

#include <casa/aips.h>
#include <display/DisplayDatas/ActiveCaching2dDD.h>
#include <display/Display/DisplayCoordinateSystem.h>
#include <display/DisplayCanvas/WCCSNLAxisLabeller.h>

namespace casacore{

        template <class T> class Matrix;
}

namespace casa { //# NAMESPACE CASA - BEGIN

        class WCPowerScaleHandler;

        class WedgeDM;

// <summary>
// A DisplayData to draw color wedges
// </summary>
//
// <use visibility=export>
//
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
//
// <prerequisite>
//   <li> DisplayData
//   </li> CachingDisplayData
// </prerequisite>
//
// <etymology>
// </etymology>
//
// <synopsis> This DisplayData can be created by itself. It's main
// task though is to set up a coordinate system form the data range
// and units of another DisplayData. The user can control this through
// options in this DisplayData: "datamin", "datamax, "dataunit" and
// "powercycles".

// </synopsis>
//
// <example>
// <srcBlock>
// </srcBlock>
// </example>
//
// <motivation>
// Users want wedges
//</motivation>
//
// <todo>
// Transposed wedges
// </todo>
//

        class WedgeDD : public ActiveCaching2dDD {

        public:

                WedgeDD( DisplayData *image );

                // Destructor.
                virtual ~WedgeDD();

                // Constructor help function, creates coordinatesystem and fills data Matrix
                virtual void setup();

                // The coordinate sydtem needs to be update when the data range changes
                virtual void updateCsys();

                // Axis labeller, 5th step in the WCHolder refresh cycle
                virtual casacore::Bool labelAxes(const WCRefreshEvent &ev);
                virtual casacore::Bool canLabelAxes() const;
                bool isDisplayable( ) const;

                // Return the data unit.
                virtual const casacore::Unit dataUnit() const;
                const casacore::IPosition dataShape() const {
                        return casacore::IPosition( );
                }
                casacore::uInt dataDim() const {
                        return 0;
                }
                std::vector<int> displayAxes( ) const {
                        return std::vector<int>( );
                }

                // casacore::Format the wedge value at the given world position.
                virtual casacore::String showValue(const casacore::Vector<casacore::Double> &world);

                // Install the default options for this DisplayData.
                virtual void setDefaultOptions();

                // Apply options stored in <src>rec</src> to the DisplayData.  A
                // return value of <src>true</src> means a refresh is needed.
                // <src>recOut</src> contains any fields which were implicitly
                // changed as a result of the call to this function.
                virtual casacore::Bool setOptions(casacore::Record &rec, casacore::Record &recOut);

                // Retrieve the current and default options and parameter types.
                virtual casacore::Record getOptions( bool scrub=false ) const;

                // Return the type of this DisplayData.
                virtual Display::DisplayDataType classType() {
                        return Display::Raster;
                }
                // Pure virtual function from DisplayData...
                casacore::String dataType() const {
                        return "wedge";
                }

                // Create a new AxesDisplayMethod for drawing on the given
                // WorldCanvas when the AttributeBuffers are suitably matched to the
                // current state of this DisplayData and of the WorldCanvas/Holder.
                // The tag is a unique number used to identify the age of the newly
                // constructed CachingDisplayMethod.
                virtual CachingDisplayMethod *newDisplayMethod(WorldCanvas *worldCanvas,
                        AttributeBuffer *wchAttributes,
                        AttributeBuffer *ddAttributes,
                        CachingDisplayData *dd);

                // Return the current options of this DisplayData as an
                // AttributeBuffer.
                virtual AttributeBuffer optionsAsAttributes();

                // Take actions on removal from WC[H] (notably, deletion of drawlists).
                virtual void notifyUnregister(WorldCanvasHolder& wcHolder,
                                              casacore::Bool ignoreRefresh = false);

                const static casacore::String WEDGE_PREFIX;

                std::string errorMessage( ) const { return ""; }

        protected:



        private:
                // (Required) copy constructor.
                WedgeDD(const WedgeDD &other);

                // (Required) copy assignment.
                void operator=(const WedgeDD &other);
                friend class WedgeDM;
                // casacore::Data minimum and maximum to set up the coordinate system
                casacore::Float itsMin, itsMax;
                // the length of the Vector
                casacore::uInt itsLength;
                // the unit of the input data
                casacore::String itsDataUnit;
                //<group>
                // the power law adjustment for for the scle handler
                casacore::Float itsPowerCycles;
                WCPowerScaleHandler* itsPowerScaleHandler;

                casacore::String itsOptionsMode;
                //</group>
                // the axis labeller
                WCCSNLAxisLabeller itsAxisLabeller;
                // The actual colorbar data
                casacore::Matrix<casacore::Float> itsColorbar;
                // the local coordinate system - gets exported to the parent DD
                DisplayCoordinateSystem itsCoordinateSystem;

                DlHandle<DisplayData> ihandle_;
        };


} //# NAMESPACE CASA - END

#endif