vtkSphereWidget.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkSphereWidget.h,v $

  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.

=========================================================================*/
#ifndef __vtkSphereWidget_h
#define __vtkSphereWidget_h

#include "vtk3DWidget.h"
#include "vtkSphereSource.h" // Needed for faster access to the sphere source

class vtkActor;
class vtkPolyDataMapper;
class vtkPoints;
class vtkPolyData;
class vtkSphereSource;
class vtkSphere;
class vtkCellPicker;
class vtkProperty;

#define VTK_SPHERE_OFF 0
#define VTK_SPHERE_WIREFRAME 1
#define VTK_SPHERE_SURFACE 2

class VTK_HYBRID_EXPORT vtkSphereWidget : public vtk3DWidget
{
public:
  static vtkSphereWidget *New();

  vtkTypeRevisionMacro(vtkSphereWidget,vtk3DWidget);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual void SetEnabled(int);
  virtual void PlaceWidget(double bounds[6]);
  void PlaceWidget()
    {this->Superclass::PlaceWidget();}
  void PlaceWidget(double xmin, double xmax, double ymin, double ymax, 
                   double zmin, double zmax)
    {this->Superclass::PlaceWidget(xmin,xmax,ymin,ymax,zmin,zmax);}


  vtkSetClampMacro(Representation,int,VTK_SPHERE_OFF,VTK_SPHERE_SURFACE);
  vtkGetMacro(Representation,int);
  void SetRepresentationToOff()
    { this->SetRepresentation(VTK_SPHERE_OFF);}
  void SetRepresentationToWireframe()
    { this->SetRepresentation(VTK_SPHERE_WIREFRAME);}
  void SetRepresentationToSurface()
    { this->SetRepresentation(VTK_SPHERE_SURFACE);}


  void SetThetaResolution(int r)
    { this->SphereSource->SetThetaResolution(r); }
  int GetThetaResolution()
    { return this->SphereSource->GetThetaResolution(); }


  void SetPhiResolution(int r)
    { this->SphereSource->SetPhiResolution(r); }
  int GetPhiResolution()
    { return this->SphereSource->GetPhiResolution(); }


  void SetRadius(double r)
    {
    if ( r <= 0 )
      {
      r = .00001;
      }
    this->SphereSource->SetRadius(r); 
    }
  double GetRadius()
    { return this->SphereSource->GetRadius(); }


  void SetCenter(double x, double y, double z) 
    {
    this->SphereSource->SetCenter(x,y,z); 
    }
  void SetCenter(double x[3]) 
    {
    this->SetCenter(x[0], x[1], x[2]);
    }
  double* GetCenter() 
    {return this->SphereSource->GetCenter();}
  void GetCenter(double xyz[3]) 
    {this->SphereSource->GetCenter(xyz);}


  vtkSetMacro(Translation,int);
  vtkGetMacro(Translation,int);
  vtkBooleanMacro(Translation,int);
  vtkSetMacro(Scale,int);
  vtkGetMacro(Scale,int);
  vtkBooleanMacro(Scale,int);


  vtkSetMacro(HandleVisibility,int);
  vtkGetMacro(HandleVisibility,int);
  vtkBooleanMacro(HandleVisibility,int);


  vtkSetVector3Macro(HandleDirection,double);
  vtkGetVector3Macro(HandleDirection,double);


  vtkGetVector3Macro(HandlePosition,double);
  
  void GetPolyData(vtkPolyData *pd);

  void GetSphere(vtkSphere *sphere);


  vtkGetObjectMacro(SphereProperty,vtkProperty);
  vtkGetObjectMacro(SelectedSphereProperty,vtkProperty);
  

  vtkGetObjectMacro(HandleProperty,vtkProperty);
  vtkGetObjectMacro(SelectedHandleProperty,vtkProperty);
  
protected:
  vtkSphereWidget();
  ~vtkSphereWidget();

//BTX - manage the state of the widget
  int State;
  enum WidgetState
  {
    Start=0,
    Moving,
    Scaling,
    Positioning,
    Outside
  };
//ETX
    
  //handles the events
  static void ProcessEvents(vtkObject* object, 
                            unsigned long event,
                            void* clientdata, 
                            void* calldata);

  // ProcessEvents() dispatches to these methods.
  void OnLeftButtonDown();
  void OnLeftButtonUp();
  void OnRightButtonDown();
  void OnRightButtonUp();
  void OnMouseMove();

  // the sphere
  vtkActor          *SphereActor;
  vtkPolyDataMapper *SphereMapper;
  vtkSphereSource     *SphereSource;
  void HighlightSphere(int highlight);
  void SelectRepresentation();

  // The representation of the sphere
  int Representation;

  // Do the picking
  vtkCellPicker *Picker;
  
  // Methods to manipulate the sphere widget
  int Translation;
  int Scale;
  void Translate(double *p1, double *p2);
  void ScaleSphere(double *p1, double *p2, int X, int Y);
  void MoveHandle(double *p1, double *p2, int X, int Y);
  void PlaceHandle(double *center, double radius);
  
  // Properties used to control the appearance of selected objects and
  // the manipulator in general.
  vtkProperty *SphereProperty;
  vtkProperty *SelectedSphereProperty;
  vtkProperty *HandleProperty;
  vtkProperty *SelectedHandleProperty;
  void CreateDefaultProperties();

  // Managing the handle
  vtkActor          *HandleActor;
  vtkPolyDataMapper *HandleMapper;
  vtkSphereSource   *HandleSource;
  void HighlightHandle(int);
  int HandleVisibility;
  double HandleDirection[3];
  double HandlePosition[3];
  virtual void SizeHandles();

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

#endif

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