/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkOrientedGlyphFocalPlaneContourRepresentation.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkOrientedGlyphFocalPlaneContourRepresentation - Contours constrained
// to a focal plane.
// 
// .SECTION Description
// This class is used to represent a contour drawn on the focal plane (usually 
// overlayed on top of an image or volume widget).
// The class was written in order to be able to draw contours on a volume widget 
// and have the contours overlayed on the focal plane in order to do contour 
// segmentation.
// 
// .SECTION See Also
// vtkOrientedGlyphContourRepresentation 

#ifndef __vtkOrientedGlyphFocalPlaneContourRepresentation_h
#define __vtkOrientedGlyphFocalPlaneContourRepresentation_h

#include "vtkFocalPlaneContourRepresentation.h"

class vtkProperty2D;
class vtkActor2D;
class vtkPolyDataMapper2D;
class vtkPolyData;
class vtkGlyph2D;
class vtkPoints;
class vtkPolyData;

class VTK_WIDGETS_EXPORT vtkOrientedGlyphFocalPlaneContourRepresentation : 
  public vtkFocalPlaneContourRepresentation
{
public:
  // Description:
  // Instantiate this class.
  static vtkOrientedGlyphFocalPlaneContourRepresentation *New();

  // Description:
  // Standard methods for instances of this class.
  vtkTypeMacro(vtkOrientedGlyphFocalPlaneContourRepresentation,
                                    vtkFocalPlaneContourRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Specify the cursor shape. Keep in mind that the shape will be
  // aligned with the  constraining plane by orienting it such that
  // the x axis of the geometry lies along the normal of the plane.
  void SetCursorShape(vtkPolyData *cursorShape);
  vtkPolyData *GetCursorShape();

  // Description:
  // Specify the shape of the cursor (handle) when it is active.
  // This is the geometry that will be used when the mouse is
  // close to the handle or if the user is manipulating the handle.
  void SetActiveCursorShape(vtkPolyData *activeShape);
  vtkPolyData *GetActiveCursorShape();

  // Description:
  // This is the property used when the handle is not active 
  // (the mouse is not near the handle)
  vtkGetObjectMacro(Property,vtkProperty2D);
  
  // Description:
  // This is the property used when the user is interacting
  // with the handle.
  vtkGetObjectMacro(ActiveProperty,vtkProperty2D);
  
  // Description:
  // This is the property used by the lines.
  vtkGetObjectMacro(LinesProperty,vtkProperty2D);
  
  // Description:
  // Subclasses of vtkOrientedGlyphFocalPlaneContourRepresentation must implement these methods. These
  // are the methods that the widget and its representation use to
  // communicate with each other.
  virtual void SetRenderer(vtkRenderer *ren);
  virtual void BuildRepresentation();
  virtual void StartWidgetInteraction(double eventPos[2]);
  virtual void WidgetInteraction(double eventPos[2]);
  virtual int ComputeInteractionState(int X, int Y, int modified=0);

  // Description:
  // Methods to make this class behave as a vtkProp.
  virtual void GetActors2D(vtkPropCollection *);
  virtual void ReleaseGraphicsResources(vtkWindow *);
  virtual int RenderOverlay(vtkViewport *viewport);
  virtual int RenderOpaqueGeometry(vtkViewport *viewport);
  virtual int RenderTranslucentPolygonalGeometry(vtkViewport *viewport);
  virtual int HasTranslucentPolygonalGeometry();
  
  // Description:
  // Get the points in this contour as a vtkPolyData. 
  virtual vtkPolyData * GetContourRepresentationAsPolyData();
  
  // Description:
  // Direction cosines of the plane on which the contour lies
  // on in world co-ordinates. This would be the same matrix that would be
  // set in vtkImageReslice or vtkImagePlaneWidget if there were a plane
  // passing through the contour points. The origin must be the origin of the 
  // data under the contour.
  vtkMatrix4x4   *GetContourPlaneDirectionCosines(const double origin[3]);
 
protected:
  vtkOrientedGlyphFocalPlaneContourRepresentation();
  ~vtkOrientedGlyphFocalPlaneContourRepresentation();

  // Render the cursor
  vtkActor2D           *Actor;
  vtkPolyDataMapper2D  *Mapper;
  vtkGlyph2D           *Glypher;
  vtkActor2D           *ActiveActor;
  vtkPolyDataMapper2D  *ActiveMapper;
  vtkGlyph2D           *ActiveGlypher;
  vtkPolyData          *CursorShape;
  vtkPolyData          *ActiveCursorShape;
  vtkPolyData          *FocalData;
  vtkPoints            *FocalPoint;
  vtkPolyData          *ActiveFocalData;
  vtkPoints            *ActiveFocalPoint;

  // The polydata represents the contour in display co-ordinates.
  vtkPolyData          *Lines;
  vtkPolyDataMapper2D  *LinesMapper;
  vtkActor2D           *LinesActor;

  // The polydata represents the contour in world coordinates. It is updated
  // (kept in sync with Lines) every time the GetContourRepresentationAsPolyData() 
  // method is called. 
  vtkPolyData          *LinesWorldCoordinates;

  // Support picking
  double LastPickPosition[3];
  double LastEventPosition[2];
  
  // Methods to manipulate the cursor
  void Translate(double eventPos[2]);
  void Scale(double eventPos[2]);
  void ShiftContour(double eventPos[2]);
  void ScaleContour(double eventPos[2]);

  void ComputeCentroid(double* ioCentroid);

  // Properties used to control the appearance of selected objects and
  // the manipulator in general.
  vtkProperty2D *Property;
  vtkProperty2D *ActiveProperty;
  vtkProperty2D *LinesProperty;

  vtkMatrix4x4  *ContourPlaneDirectionCosines;

  void           CreateDefaultProperties();
  
  
  // Distance between where the mouse event happens and where the
  // widget is focused - maintain this distance during interaction.
  double InteractionOffset[2];

  void BuildLines();
  
private:
  vtkOrientedGlyphFocalPlaneContourRepresentation(const vtkOrientedGlyphFocalPlaneContourRepresentation&);  //Not implemented
  void operator=(const vtkOrientedGlyphFocalPlaneContourRepresentation&);  //Not implemented
};

#endif