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

  Program:   Visualization Toolkit
  Module:    vtkPolygonalHandleRepresentation3D.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 vtkPolygonalHandleRepresentation3D - represent the position of a handle in 3D space
// .SECTION Description
// This class serves as the geometrical representation of a vtkHandleWidget. 
// The handle can be represented by an arbitrary polygonal data (vtkPolyData),
// set via SetHandle(vtkPolyData *). The actual position of the handle 
// will be initially assumed to be (0,0,0). You can specify an offset from
// this position if desired.
// .SECTION See Also
// vtkPointHandleRepresentation3D vtkHandleRepresentation vtkHandleWidget


#ifndef __vtkPolygonalHandleRepresentation3D_h
#define __vtkPolygonalHandleRepresentation3D_h

#include "vtkHandleRepresentation.h"

class vtkProperty;
class vtkActor;
class vtkPolyDataMapper;
class vtkCellPicker;
class vtkTransformPolyDataFilter;
class vtkMatrixToLinearTransform;
class vtkMatrix4x4;
class vtkPolyData;

class VTK_WIDGETS_EXPORT vtkPolygonalHandleRepresentation3D 
                           : public vtkHandleRepresentation
{
public:
  // Description:
  // Instantiate this class.
  static vtkPolygonalHandleRepresentation3D *New();

  // Description:
  // Standard methods for instances of this class.
  vtkTypeRevisionMacro(vtkPolygonalHandleRepresentation3D,vtkHandleRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Set the position of the point in world and display coordinates. Note 
  // that if the position is set outside of the bounding box, it will be 
  // clamped to the boundary of the bounding box. This method overloads
  // the superclasses' SetWorldPosition() and SetDisplayPosition() in 
  // order to set the focal point of the cursor properly.
  virtual void SetWorldPosition(double p[3]);
  virtual void SetDisplayPosition(double p[3]);

  // Description:
  // Set/get the handle polydata.
  void SetHandle( vtkPolyData * );
  vtkPolyData * GetHandle();

  // Description:
  // Set/get the offset of the handle position with respect to the handle 
  // center, assumed to be the origin.
  vtkSetVector3Macro( Offset, double );
  vtkGetVector3Macro( Offset, double );

  // Description:
  // Set/Get the handle properties when unselected and selected.
  void SetProperty(vtkProperty*);
  void SetSelectedProperty(vtkProperty*);
  vtkGetObjectMacro(Property,vtkProperty);
  vtkGetObjectMacro(SelectedProperty,vtkProperty);
  
  // Description:
  // Methods to make this class properly act like a vtkWidgetRepresentation.
  virtual void BuildRepresentation();
  virtual void StartWidgetInteraction(double eventPos[2]);
  virtual void WidgetInteraction(double eventPos[2]);
  virtual int ComputeInteractionState(int X, int Y, int modify=0);

  // Description:
  // Methods to make this class behave as a vtkProp.
  virtual void ShallowCopy(vtkProp *prop);
  virtual void GetActors(vtkPropCollection *);
  virtual void ReleaseGraphicsResources(vtkWindow *);
  virtual int RenderOpaqueGeometry(vtkViewport *viewport);
  virtual int RenderTranslucentPolygonalGeometry(vtkViewport *viewport);
  virtual int HasTranslucentPolygonalGeometry();
  
protected:
  vtkPolygonalHandleRepresentation3D();
  ~vtkPolygonalHandleRepresentation3D();

  vtkActor                   * Actor;
  vtkPolyDataMapper          * Mapper;
  vtkTransformPolyDataFilter * HandleTransformFilter;
  vtkMatrixToLinearTransform * HandleTransform;
  vtkMatrix4x4               * HandleTransformMatrix;
  vtkCellPicker              * HandlePicker;
  double                       LastPickPosition[3];
  double                       LastEventPosition[2];
  double                       Offset[3];
  int                          ConstraintAxis;
  vtkProperty                * Property;
  vtkProperty                * SelectedProperty;
  int                          WaitingForMotion;
  int                          WaitCount;

  void Highlight(int highlight);

  // Methods to manipulate the cursor
  void Translate(double *p1, double *p2);
  void Scale(double *p1, double *p2, double eventPos[2]);
  void MoveFocus(double *p1, double *p2);
  
  void CreateDefaultProperties();

  // Given a motion vector defined by p1 --> p2 (p1 and p2 are in 
  // world coordinates), the new display position of the handle center is 
  // populated into requestedDisplayPos. This is again only a request for the
  // new display position. It is up to the point placer to deduce the 
  // appropriate world co-ordinates that this display position will map into.
  // The placer may even disallow such a movement.
  void MoveFocusRequest( 
      double *p1, double *p2, double requestedDisplayPos[3] );

  int DetermineConstraintAxis(int constraint, double *x, double *startPickPos);
  
private:
  vtkPolygonalHandleRepresentation3D(const vtkPolygonalHandleRepresentation3D&);  //Not implemented
  void operator=(const vtkPolygonalHandleRepresentation3D&);  //Not implemented
};

#endif
