vtkSphereHandleRepresentation.h

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

  Program:   Visualization Toolkit
  Module:    vtkSphereHandleRepresentation.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.

=========================================================================*/
#ifndef vtkSphereHandleRepresentation_h
#define vtkSphereHandleRepresentation_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkHandleRepresentation.h"
#include "vtkSphereSource.h" // Needed for delegation to sphere

class vtkSphereSource;
class vtkProperty;
class vtkActor;
class vtkPolyDataMapper;
class vtkCellPicker;

class VTKINTERACTIONWIDGETS_EXPORT vtkSphereHandleRepresentation
                        : public vtkHandleRepresentation
{
public:
  static vtkSphereHandleRepresentation *New();


  vtkTypeMacro(vtkSphereHandleRepresentation,vtkHandleRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  void SetWorldPosition(double p[3]) override;
  void SetDisplayPosition(double p[3]) override;


  vtkSetMacro(TranslationMode,vtkTypeBool);
  vtkGetMacro(TranslationMode,vtkTypeBool);
  vtkBooleanMacro(TranslationMode,vtkTypeBool);

  void SetSphereRadius(double);
  double GetSphereRadius();


  void SetProperty(vtkProperty*);
  void SetSelectedProperty(vtkProperty*);
  vtkGetObjectMacro(Property,vtkProperty);
  vtkGetObjectMacro(SelectedProperty,vtkProperty);


  vtkSetClampMacro(HotSpotSize,double,0.0,1.0);
  vtkGetMacro(HotSpotSize,double);

  void SetHandleSize(double size) override;


  double *GetBounds() VTK_SIZEHINT(6) override;
  void BuildRepresentation() override;
  void StartWidgetInteraction(double eventPos[2]) override;
  void WidgetInteraction(double eventPos[2]) override;
  int ComputeInteractionState(int X, int Y, int modify=0) override;
  void PlaceWidget(double bounds[6]) override;


  void ShallowCopy(vtkProp *prop) override;
  void DeepCopy(vtkProp *prop) override;
  void GetActors(vtkPropCollection *) override;
  void ReleaseGraphicsResources(vtkWindow *) override;
  int RenderOpaqueGeometry(vtkViewport *viewport) override;
  int RenderTranslucentPolygonalGeometry(vtkViewport *viewport) override;
  vtkTypeBool HasTranslucentPolygonalGeometry() override;

  void Highlight(int highlight) override;

  /*
  * Register internal Pickers within PickingManager
  */
  void RegisterPickers() override;

protected:
  vtkSphereHandleRepresentation();
  ~vtkSphereHandleRepresentation() override;

  // the cursor3D
  vtkActor          *Actor;
  vtkPolyDataMapper *Mapper;
  vtkSphereSource   *Sphere;
  // void Highlight(int highlight);

  // Do the picking
  vtkCellPicker *CursorPicker;
  double LastPickPosition[3];
  double LastEventPosition[2];

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

  // Properties used to control the appearance of selected objects and
  // the manipulator in general.
  vtkProperty *Property;
  vtkProperty *SelectedProperty;
  void         CreateDefaultProperties();

  // The size of the hot spot.
  double HotSpotSize;
  int    DetermineConstraintAxis(int constraint, double *x);
  int    WaitingForMotion;
  int    WaitCount;

  // Current handle sized (may reflect scaling)
  double CurrentHandleSize;

  // Control how translation works
  vtkTypeBool TranslationMode;

private:
  vtkSphereHandleRepresentation(const vtkSphereHandleRepresentation&) = delete;
  void operator=(const vtkSphereHandleRepresentation&) = delete;
};

#endif