DrawingDisplayData.h

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//# DrawingDisplayData.h: interactive drawing DisplayData
//# Copyright (C) 1999,2000,2002
//# 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_DRAWINGDISPLAYDATA_H
#define TRIALDISPLAY_DRAWINGDISPLAYDATA_H

#include <casa/aips.h>
#include <casa/Containers/List.h>
#include <display/Display/DisplayEnums.h>
#include <display/DisplayDatas/PassiveCachingDD.h>

namespace casa { //# NAMESPACE CASA - BEGIN

        class WorldCanvas;
        class WorldCanvasHolder;
        class AttributeBuffer;
        class DrawingDisplayMethod;
        class DDDObject;

// <summary>
// DisplayData which provides interactive drawing capabilities.
// </summary>

// <synopsis>
// This class provides an implementation of a PassiveCachingDD which
// provides the ability for the programmer to add various objects
// to the display (eg. rectangles), and then modify them, or allow
// the user to interactively modify the objects.
// </synopsis>

        class DrawingDisplayData : public PassiveCachingDD {

        public:

                // Constructor.
                DrawingDisplayData(const Display::KeySym keysym =
                                       Display::K_Pointer_Button1);

                // Destructor.
                virtual ~DrawingDisplayData();

                // 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;

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

                // 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();

                virtual void refreshEH(const WCRefreshEvent &ev);

                // Add an object to the drawing as described in the given Record.
                virtual void addObject(const Record &description);

                // Get the description of the object with the given id.
                virtual Record description(const Int objectID);

                // Set the description of the object with the given id.
                virtual void setDescription(const Int objectID, const Record &rec);

                // Remove the object with the given id.
                virtual void removeObject(const Int objectID);

                // Set the handle state of the particular item.
                virtual void setHandleState(DDDObject *item, const Bool state);

                // Return the current setting of the labelposition option.
                virtual String labelPosition() {
                        return itsOptionsLabelPosition;
                }

                // Set/get which key to catch.
                // <group>
                virtual void setKey(const Display::KeySym &keysym);
                virtual Display::KeySym key() const {
                        return itsKeySym;
                }
                virtual Display::KeyModifier keyModifier() const {
                        return itsKeyModifier;
                }
                // </group>

                // Double click interval.
                virtual Double doubleClickInterval() const {
                        return itsDoubleClickInterval;
                }

                // Called when a double click occurred for the identified object.
                // Null implementation in this class, derived classes can over-ride.
                virtual void doubleClick(const Int objectID);

        protected:

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

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

        private:

                friend class DrawingDisplayMethod;

                // The key to handle.
                Display::KeySym itsKeySym;

                // The modifier mask for the key.
                Display::KeyModifier itsKeyModifier;

                // Double click interval (seconds)
                Double itsDoubleClickInterval;

                // List containing the DDDObjects for this DrawingDisplayData.
                List<void *> itsDDDOList;

                // Iterator for itsDDDOList
                ListIter<void *> *itsDDDOListIter;

                // Obvious!
                DDDObject *itsObjectWhichIsShowingHandles;

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

                // Option: position for labels
                String itsOptionsLabelPosition;

        };


} //# NAMESPACE CASA - END

#endif