Profile2dDD.h

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//# Profile2dDD.h: 2D Profile DisplayData
//# Copyright (C) 2003,2004
//# 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_PROFILE2DDD_H
#define TRIALDISPLAY_PROFILE2DDD_H

#include <casa/aips.h>
#include <casa/Arrays/Array.h>
#include <casa/Arrays/Vector.h>
#include <casa/Arrays/Matrix.h>
#include <display/Display/DParameterColorChoice.h>
#include <display/Display/DParameterFontChoice.h>
#include <display/Display/DParameterMapKeyChoice.h>
#include <display/Display/DParameterRange.h>
#include <display/Display/DParameterSwitch.h>
#include <display/DisplayDatas/ActiveCaching2dDD.h>
#include <display/DisplayCanvas/WCCSNLAxisLabeller.h>
#include <display/DisplayEvents/DisplayEH.h>
#include <lattices/LatticeMath/LatticeStatsBase.h>

namespace casa { //# NAMESPACE CASA - BEGIN

        template <class T> class LatticePADisplayData;
        template <class T> class DParameterRange;

        class WorldCanvas;
        class Profile2dDM;
        class DParameterColorChoice;
        class DParameterMapKeyChoice;
        class DParameterSwitch;

// <summary>
// A DisplayData to draw Profiles
// </summary>
//
// <use visibility=export>
//
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
//
// <prerequisite>
//   <li> DisplayData
//   <li> CachingDisplayData
//   <li> ActiveCaching2dDD
// </prerequisite>
//
// <etymology> </etymology>

// <synopsis> This Display Data attaches to itself, another Display
// Data whos profile (at a point) is to be extracted and drawn.  The
// Display Data attached to Profile2dDD must have atleast 3 world Axes
// and atleast 2 pixels on it's profile axis (3rd axis).  An axis from
// a Linear Coordinate or Stokes Coordinate presently can not be on
// the profile axis.  All other AIPS++ coordinate types are supported.
//
// Profile2dDD is an implements WCMotionEH and WCPositionEH and
// listens to motion and position events generated by the attached
// Display Data. A motion event comes with a new world position on
// the attached Display Data. Profile2dDD uses this world position to
// extract and draw a profile on its world canvas. A Position event
// (key press) switches the profiling on and off. The default switch
// is the space bar.
//
// Profile2dDD is a DisplayEH (all DisplayDatas are) and listens to
// DisplayEvents sent out by the attached DisplayData. This is so it
// can listen for Tool events such as Crosshair event.
//
// Each time the profile is refreshed (with new data), Profile2dDD
// sends out a DDModEvent to all listening DisplayEHs, to indicate
// that the data has been modified.
//
// Since Profile2dDD inherit's from ActiveCaching2dDD and uses
// WCCSNLAxisLabeller, all the options such as position tracking and
// axis labelling are available.  Options specific to Profilng, such
// as profile color, line width, line style and autoscaling are also
// available. </synopsis>
//
// <example>
// </example>
//
// <motivation>
// Existing Glish implementation is too slow and limited.
// </motivation>
//
// <todo>
// <li> Mixed axes sometimes result in slow and messy axis labelling
// <li> Update Profile2dDD in real time when axis of attached dd
// changes
// <li> Option to start Profile from a specific channel.
// <li> Add support for Display Datas with profile of a linear
// coordinate axis.
// <li> Flux and integrated flux calculations
// <li> Ability to add multiple display datas and overlay their
// profiles

// </todo>

        class Profile2dDD : public ActiveCaching2dDD, public WCMotionEH,
                public WCPositionEH {

        public:
                // <group>
                // (Required) default constructor.
                Profile2dDD();

                // Constructor taking a pointer to an already constructed
                // ImageInterface.The Display Data dd must have atleast 3 World Axes
                // and atleast 2 elements in the profile (3rd) world axis.
                Profile2dDD(LatticePADisplayData<Float>* dd);

                // Destructor.
                virtual ~Profile2dDD();
                // </group>

                // <group>
                // Attach a Display Data to this Profile2dDD. The Display Data dd
                // must have atleast 3 World Axes and atleast 2 elements in the
                // profile (3rd) world axis. If any of the above conditions are not
                // met or a Display Data is already attached, False is
                // returned. Otherwise True is returned.
                virtual Bool attachDD(LatticePADisplayData<Float>* dd);

                // Detach the currently attached Display Data.
                virtual void detachDD();
                // </group>

                // Overloading ActiveCaching2dDD::sizeControl. Zooming is modified
                // for autoscaling feature.
                virtual Bool sizeControl(WorldCanvasHolder &wcHolder,
                                         AttributeBuffer &holderBuf);

                // <group>
                // Store the data to be drawn in the data Matrix. If world is false,
                // pixel coordinates are used. If world is true, then world
                // coordinates are used.
                virtual void getDrawData(Matrix<Double> &data,
                                         const Bool world=False);

                // Store the mask in mask vector
                virtual void getMaskData(Vector<Bool> &mask);

                // Store the details of the current profile in rec
                // Record structure similar to position event structure.
                virtual void getProfileAsRecord(Record &rec);
                // </group>


                // Return the data unit.
                virtual const Unit dataUnit();

                // Returns an empty string.
                virtual String showValue(const Vector<Double> &world);

                // Motion Event Handler
                virtual void operator()(const WCMotionEvent &ev);

                // Position Event Handler
                virtual void operator()(const WCPositionEvent &ev);

                // Display Event Handler
                virtual void handleEvent(DisplayEvent &ev);

                // Send out DDModEvents to all DisplayEHs listening
                virtual void sendDDModEvent();

                // Draws and labels the axes based on the refresh event
                virtual Bool labelAxes(const WCRefreshEvent &ev);
                virtual Bool canLabelAxes() const;

                // <group>
                // 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 Bool setOptions(Record &rec, Record &recOut);

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

                // Return the type of this DisplayData.
                virtual Display::DisplayDataType classType() {
                        return Display::Vector;
                }

                // Create a new CachingDisplayMethod 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,
                                              Bool ignoreRefresh = False);

                // <group>
                // Return Profile Color
                virtual String profileColor() const {
                        return itsParamColor->value();
                }
                // Return Profile Line Width
                virtual Float profileLineWidth() const {
                        return itsParamLineWidth->value();
                }
                // Return Profile LineStyle
                virtual Display::LineStyle profileLineStyle() {
                        return static_cast<Display::LineStyle>(itsParamLineStyle->keyValue());
                }

                // Return True if the last requested profile was for a
                // region. Return False if the last requested profile was for a
                // single point
                virtual Bool isRegionProfile() const {
                        return itsIsRegionProfile;
                }

                // get the region dimensions, in pixels, of the last region
                // submitted to Profile2dDD.
                virtual void regionDimensions(Vector<Double> &regionBlc,
                                              Vector<Double> &regionTrc);

                // Return Minimum Y value
                virtual Double profileYMin() const {
                        return itsCurrentBlc(1);
                }
                // Return Maximum Y value
                virtual Double profileYMax() const {
                        return itsCurrentTrc(1);
                }
                // Return Minimum X value
                virtual Double profileXMin() const {
                        return itsCurrentBlc(0);
                }
                // Return Maximum X value
                virtual Double profileXMax() const {
                        return itsCurrentTrc(0);
                }
                // Return the autoscale status (On or Off)
                virtual Bool profileAutoscale() const {
                        return itsParamAutoscale->value();
                }
                // Return the rest frequency display status (to draw or not to draw)
                virtual Bool showRestFrequency()  const {
                        return itsParamShowRestFrequency->value();
                }
                // Return rest frequency.
                virtual Double restFrequency()  const {
                        return itsRestFrequency;
                }

                // Return the statistics used for region calculations.
                virtual LatticeStatsBase::StatisticsTypes  regionStatType()  const {
                        return static_cast<LatticeStatsBase::StatisticsTypes>
                               (itsParamRegionStatType->keyValue());
                }

                // Return the x value added to the pixel at a pixel position to
                // create a region
                virtual Int regionXRadius()  const {
                        return itsParamRegionXRadius->value();
                }

                // Return the y value added to the pixel at a pixel position to
                // create a region
                virtual Int regionYRadius()  const {
                        return itsParamRegionYRadius->value();
                }
                // Return the profile axis number (from the original image)
                virtual  Int profileAxis();

                // </group>

        protected:

                friend class Profile2dDM;

                // (Required) copy constructor.
                Profile2dDD(const Profile2dDD &other);

                // (Required) copy assignment.
                void operator=(const Profile2dDD &other);

        private:

                // Helper function. Initialise Profile2dDD with a DisplayCoordinateSystem
                // put together from the parent DD
                Bool createCoordinateSystem();

                // Update the coordinate system of this Display Data and the axis
                // labeller. Set new minimum and maximum Y values if necessary
                Bool updateCoordinateSys(DisplayCoordinateSystem &cs);

                // Extract the profile data from the provided pixel region and place
                // it into itsData. The statistics used is determined by the
                // options. Return True if new profile data has been extracted
                // (i.e. a refresh is needed) otherwise return False
                Bool getRegionProfile(Vector<Double> &fpixelBlc,
                                      Vector<Double> &fpixelTrc);

                // Extract the profile data from the provided world position and
                // place it into itsData. Also extract the Mask data (if it exists)
                // and place it into itsMask. Return True if new profile data has
                // been extracted (i.e. a refresh is needed) otherwise return False
                Bool getPointProfile(const Vector<Double> &world);

                // Crop the region so that it does not define areas outside the
                // data. Returns False if the entire region is outside image data
                Bool cropRegion(Vector<Double> &fpixelBlc,
                                Vector<Double> &fpixelTrc);

                // Construct the parameters for getOptions and setOptions
                virtual void constructParameters();
                // Delete the parameters for getOptions() and setOptions()
                virtual void destructParameters();

                // A pointer to the attached DisplayData
                LatticePADisplayData<Float>* itsDD;

                // Flag to indicate whether the last drawn profile was for a region
                // or for a single point.
                Bool itsIsRegionProfile;

                // A flag to indicate whether tracking is on. If True, a new profile
                // is extracted each time a new motion event is received.
                Bool itsTrackingState;

                // The dependent (world) axis of itsDD. For example, if a RA axis is
                // the profile axis, then the DEC axis will be the dependent axis.
                Int itsDependentAxis;

                // Increment value for the linear coordinate on the Y axis
                Double itsYAxisInc;

                // Rest Frequency
                Double itsRestFrequency;

                // Minimum and maximum X/Y values
                Vector<Double> itsCurrentBlc;
                Vector<Double> itsCurrentTrc;

                // <group> The pixel position on the world canvas when the last
                // motion' event was received. This position is in the format of
                // itsDD, NOT the original image.
                Vector<Double> itsPixelPosition;
                // The world position on the world canvas when the last motion'
                // event was received. This position is in the format of
                // itsDD, NOT the original image.
                Vector<Double> itsWorldPosition;

                // The region dimensions, in pixels, of the last region event
                // received by Profile2dDD
                Vector<Double> itsRegionBlc;
                Vector<Double> itsRegionTrc;

                // </group>
                // The Profile Data
                Matrix<Double> itsData;
                // The Mask Data
                Vector<Bool> itsMask;

                // The axis map between input DD's Coordinate system and
                // itsCompleteCS
                Vector<Int> itsWorldAxisMap;
                Vector<Int> itsPixelAxisMap;

                // The choices for region calculations. eg, mean, median, etc
                Vector<String> itsRegionCalcChoices;

                // The default x and y axis labels. The x and y labels change to
                // indicate region profiles.
                Vector<String> itsDefaultAxisLabels;

                // The Axis Labeller used to draw Axes
                WCCSNLAxisLabeller itsAxisLabeller;

                // Display Parameters for
                DParameterColorChoice* itsParamColor;
                DParameterRange<Float>* itsParamLineWidth;
                DParameterMapKeyChoice* itsParamLineStyle;
                DParameterSwitch* itsParamAutoscale;
                DParameterSwitch* itsParamShowRestFrequency;
                DParameterMapKeyChoice* itsParamRegionStatType;
                DParameterRange<Int>* itsParamRegionXRadius;
                DParameterRange<Int>* itsParamRegionYRadius;
        };

} //# NAMESPACE CASA - END

#endif