MWCPositionVelocityTool.h

Go to the documentation of this file.

//# MWCPositionVelocityTool.h: MultiWorldCanvas position velocity tool
//# Copyright (C) 2012
//# 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 VIEWER_MWCPOSITIONVELOCITYTOOL_H_
#define VIEWER_MWCPOSITIONVELOCITYTOOL_H_

#include <casa/aips.h>
#include <casa/Arrays/Vector.h>
#include <display/DisplayEvents/MultiWCTool.h>
#include <display/DisplayEvents/DTVisible.h>

namespace casa { //# NAMESPACE CASA - BEGIN

        class WorldCanvas;

        // <summary>
        // Multi WorldCanvas event-based position velocity tool
        // </summary>
        //
        // <use visibility=export>
        //
        // <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
        // </reviewed>
        //
        // <prerequisites>
        // </prerequisites>
        //
        // <etymology>
        // MWCPositionVelocityTool implements a position-velocity tool using the MultiWorldCanvas
        // </etymology>
        //
        // <synopsis>
        // </synopsis>
        //
        // <example>
        // </example>
        //
        // <motivation>
        // </motivation>
        //
        // <todo asof="">
        // </todo>

        class MWCPositionVelocityTool : public MultiWCTool, public DTVisible {
  
                public:  
                        // Constructor
                        MWCPositionVelocityTool( Display::KeySym keysym = Display::K_Pointer_Button1, Bool scrollingAllowed = True );
  
                        // Destructor
                        virtual ~MWCPositionVelocityTool();
  
                        // Reset to non-showing, non-active.  Refreshes if necessary to erase
                        // (unless skipRefresh==True).
                        // (Does not unregister from WCs or disable future event handling).
                        virtual void reset(Bool skipRefresh=False);

                protected:
                        // Functions called by the base class mouse event handling operators -
                        // these maintain the state of the pan vector and order it to be drawn
                        // via refresh().
                        // <group>
                        virtual void keyPressed(const WCPositionEvent &/*ev*/);
                        virtual void keyReleased(const WCPositionEvent &/*ev*/);
                        virtual void moved(const WCMotionEvent &/*ev*/, const viewer::region::region_list_type & /*selected_regions*/);
                        // </group>

                        // draw the distance vector on a PixelCanvas.  (To be called only by the
                        // base class refresh event handler).
                        virtual void draw(const WCRefreshEvent&/*ev*/, const viewer::region::region_list_type & /*selected_regions*/);

                private:
                        // Should we respond to mouse movement and button release?  Should
                        // we draw?  Set when the button is pushed in one of the tool's WCs.
                        Bool itsActive;

                        // are the units in x and y identical?
                        Bool itsEqualUnits;

                        // pixel coordinates of the pan vector.  1 = anchor, 2 = new position.
                        Int itsX1, itsY1, itsX2, itsY2, itsX3, itsY3;

                        // axis index for RA and DEC
                        Int itsRaIndex, itsDecIndex;
        };


} //# NAMESPACE CASA - END

#endif