TblAsXYDD.h

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//# TblAsXYDD.h: Display casacore::Data for xy displays of data from a table
//# Copyright (C) 2000,2001,2002
//# 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
//#
//#
//# $Id$

#ifndef TRIALDISPLAY_TBLASXYDD_H
#define TRIALDISPLAY_TBLASXYDD_H

#include <casa/aips.h>
#include <casa/Arrays/Vector.h>
#include <display/Display/DParameterRange.h>
#include <display/Display/DParameterChoice.h>
#include <display/Display/DParameterString.h>
#include <coordinates/Coordinates/LinearCoordinate.h>
#include <display/DisplayDatas/ActiveCaching2dDD.h>

namespace casacore{

        class Table;
        class Regex;
}

namespace casa { //# NAMESPACE CASA - BEGIN

        class TblAsXYDM;

//# Forward Declarations

// <summary>
//Class for displaying data within a table as a xy image.
// </summary>

// <use visibility=local>   or   <use visibility=export>

// <reviewed reviewer="" date="" tests="" demos="">
// </reviewed>

// <prerequisite>
//   <li> ActiveCaching2dDD
//   <li> CachingDisplayData
//   <li> Table
// </prerequisite>
//
// <etymology>
// "TblAsXYDD" is a implementation of a <linkto class=ActiveCaching2dDD>
// ActiveCaching2dDD </linkto> which provides for the display of data held
// within a table to be displayed as a xy image in an environment where
// individual depictions of the data are automatically cached.
// </etymology>
//
// <synopsis>
// This class adds to the interface defined in <linkto
// class=DisplayData>DisplayData </linkto>.  It adds the capability to
// display data from a <linkto class=casacore::Table>Table</linkto>
// column as a xy image.  It is assumed that the Y axis is defined
// to be either the row number of the table column being displayed or
// the scalar value from the same row number in a different table
// column (e.g. plotting intensity as a function of frequency against
// row number or time determined from a different column of the table).
// The X axis is assumed to be the data in a scalar table column.
// </synopsis>
//
// <example>
// A TblAsXYDD object could be construed and used as follows:
// <srcblock>
//    TblAsXYDD *tardd1 = 0;
//    tardd1 = new TblAsXYDD("tablename");
//    Colormap cmap1("Hot Metal 2");
//    tardd1->setColormap(&cmap1, 1.0);
//    wcHolder->addDisplayData((DisplayData *)tardd1);
// </srcblock>
// </example>
//
// <motivation>
// To allow the display of data from a table as a xy image.
// </motivation>
//
// <templating arg=T>
// </templating>
//
// <thrown>
// </thrown>
//
// <todo asof="2000/10/30">
//   <li> make sure complex data are handled correctly
//   <li> make sure table column units can be determined properly
//   <li> make sure a scalar table column can be used for y axis
//   <li> extend to n-dimensional arrays in table column
//   <li> when constructed with *table we need to keep table from being deleted
//   <li> handle movie axis once ActiveCachingNDim exists
//   <li> implement showValue()
//   <li> be able to derive xy plot data from columns with arrays
//   <li> choose whether to draw points, lines or both
// </todo>

        class TblAsXYDD : public ActiveCaching2dDD {

        public:

                // constructors
                // given an already constructed table
                TblAsXYDD(casacore::Table *table);

                // given a string which gives the full pathname and filename of a table
                // on disk
                TblAsXYDD(const casacore::String tablename);

                // Destructor
                virtual ~TblAsXYDD();

                // format the table value at the give world position
                virtual casacore::String showValue(const casacore::Vector<casacore::Double> &world);

                // get the data unit
                virtual const casacore::Unit dataUnit(const casacore::String column);
                virtual const casacore::Unit dataUnit();

                // 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::Vector;
                }

                // Create a new TblAsXyDM 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();

                //provide read-only access to the table
                casacore::Table *table();

                // Clean up (ie. delete any existing cached display list).
                virtual void cleanup();

        protected:

                // (Required) default constructor.
                TblAsXYDD();

                // (Required) copy constructor.
                TblAsXYDD(const TblAsXYDD &other);

                // (Required) copy assignment.
                void operator=(const TblAsXYDD &other);

// Get the value of the named keyword, or the first keyword matching
                // <src>regex</src>, and return it in <src>value</src>.  The return
                // value is <src>true</src> for success, and <src>false</src> for
                // failure, which is the result if the wrong type <src>T</src> is
                // requested.
                // <group>
                template <class T> casacore::Bool getTableKeyword(T &value,
                                                        const casacore::String keyword) const;
                template <class T> casacore::Bool getTableKeyword(T &value, const casacore::Regex &regex) const;
                // </group>

                // Get the value of the named keyword, or the first keyword matching
                // <src>regex</src> for the named column, and return it in
                // <src>value</src>. The return value is <src>true</src> for
                // success, and <src>false</src> for failure, which is the result if           // the wrong type <src>T</src> is requested, or if the keyword
                // doesn't exist.
                // <group>
                template <class T> casacore::Bool getColumnKeyword(T &value, const casacore::String column,
                        const casacore::String keyword) const;
                template <class T> casacore::Bool getColumnKeyword(T &value, const casacore::String column,
                        const casacore::Regex &regex) const;
                // </group>
        private:

                friend class TblAsXYDM;

                // The table to be displayed
                casacore::Table *itsTable;

                // The result from a table query
                casacore::Table *itsQueryTable;

                // store all the table column names
                casacore::Vector<casacore::String> itsColumnNames;

                // what columns are we displaying and do we have a movie axis available
                DParameterChoice *itsXColumnName;
                DParameterChoice *itsYColumnName;
                DParameterChoice *itsMColumnName;
                DParameterChoice *itsMColumnSet;

                // options - what is the query string and is it unset?
                casacore::String itsOptQueryString;
                casacore::Bool itsOptQueryStringUnset;

                // set the default options for this display data
                void installDefaultOptions();

                // Arrange the query table (called after changing an option).
                casacore::Bool arrangeQueryTable();

                // holder for the current coordinate system
                DisplayCoordinateSystem itsCoord;
                casacore::Vector<casacore::Double> itsLinblc, itsLintrc;

                // update/set the coordinate system
                void getCoordinateSystem();
                void setCoordinateSystem();

                // get all of the table columnNames
                void getTableColumnNames();

                // get the table column world coordinate range
                casacore::Vector<double> columnStatistics(const casacore::String& columnName);

                // get all of the table columnNames with a certain data type
                casacore::Vector<casacore::String> getColumnNamesOfType();

                // Construct and destruct the parameter set.
                // <group>
                void constructParameters();
                void destructParameters();
                // </group>

        };



} //# NAMESPACE CASA - END

#ifndef AIPS_NO_TEMPLATE_SRC
#include <display/DisplayDatas/TblAsXYDDTemplates.tcc>
#endif //# AIPS_NO_TEMPLATE_SRC
#endif