vtkImagePlaneWidget.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImagePlaneWidget.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 __vtkImagePlaneWidget_h
#define __vtkImagePlaneWidget_h

#include "vtkPolyDataSourceWidget.h"

class vtkActor;
class vtkCellPicker;
class vtkDataSetMapper;
class vtkImageData;
class vtkImageMapToColors;
class vtkImageReslice;
class vtkLookupTable;
class vtkMatrix4x4;
class vtkPlaneSource;
class vtkPoints;
class vtkPolyData;
class vtkPolyDataMapper;
class vtkProperty;
class vtkTextActor;
class vtkTextProperty;
class vtkTexture;
class vtkTextureMapToPlane;
class vtkTransform;

#define VTK_NEAREST_RESLICE 0
#define VTK_LINEAR_RESLICE  1
#define VTK_CUBIC_RESLICE   2

class VTK_EXPORT vtkImagePlaneWidget : public vtkPolyDataSourceWidget
{
public:
  static vtkImagePlaneWidget *New();

  vtkTypeRevisionMacro(vtkImagePlaneWidget,vtkPolyDataSourceWidget);
  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);}

  void SetInput(vtkDataSet* input);


  void SetOrigin(double x, double y, double z);
  void SetOrigin(double xyz[3]);
  double* GetOrigin();
  void GetOrigin(double xyz[3]);


  void SetPoint1(double x, double y, double z);
  void SetPoint1(double xyz[3]);
  double* GetPoint1();
  void GetPoint1(double xyz[3]);


  void SetPoint2(double x, double y, double z);
  void SetPoint2(double xyz[3]);
  double* GetPoint2();
  void GetPoint2(double xyz[3]);


  double* GetCenter();
  void GetCenter(double xyz[3]);


  double* GetNormal();
  void GetNormal(double xyz[3]);

  void GetVector1(double v1[3]);

  void GetVector2(double v2[3]);

  int GetSliceIndex();

  void SetSliceIndex(int index);

  double GetSlicePosition();

  void SetSlicePosition(double position);


  void SetResliceInterpolate(int);
  vtkGetMacro(ResliceInterpolate,int);
  void SetResliceInterpolateToNearestNeighbour()
    { this->SetResliceInterpolate(VTK_NEAREST_RESLICE); }
  void SetResliceInterpolateToLinear()
    { this->SetResliceInterpolate(VTK_LINEAR_RESLICE); }
  void SetResliceInterpolateToCubic()
    { this->SetResliceInterpolate(VTK_CUBIC_RESLICE); }

  vtkImageData* GetResliceOutput();


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


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


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


  virtual void SetTextureVisibility(int);
  vtkGetMacro(TextureVisibility,int);
  vtkBooleanMacro(TextureVisibility,int);
  
  void GetPolyData(vtkPolyData *pd);

  vtkPolyDataSource* GetPolyDataSource();

  void UpdatePlacement(void);

  vtkTexture *GetTexture();


  vtkGetObjectMacro(ColorMap, vtkImageMapToColors);
  virtual void SetColorMap(vtkImageMapToColors *);


  virtual void SetPlaneProperty(vtkProperty*);
  vtkGetObjectMacro(PlaneProperty,vtkProperty);
  virtual void SetSelectedPlaneProperty(vtkProperty*);
  vtkGetObjectMacro(SelectedPlaneProperty,vtkProperty);


  void SetPlaneOrientation(int);
  vtkGetMacro(PlaneOrientation,int);
  void SetPlaneOrientationToXAxes()
    { this->SetPlaneOrientation(0); }
  void SetPlaneOrientationToYAxes()
    { this->SetPlaneOrientation(1); }
  void SetPlaneOrientationToZAxes()
    { this->SetPlaneOrientation(2); }

  void SetPicker(vtkCellPicker*);


  virtual void SetLookupTable(vtkLookupTable*);
  vtkGetObjectMacro(LookupTable,vtkLookupTable);


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


  virtual void SetCursorProperty(vtkProperty*);
  vtkGetObjectMacro(CursorProperty,vtkProperty);


  virtual void SetMarginProperty(vtkProperty*);
  vtkGetObjectMacro(MarginProperty,vtkProperty);


  void SetTextProperty(vtkTextProperty* tprop);
  vtkTextProperty* GetTextProperty();


  virtual void SetTexturePlaneProperty(vtkProperty*);
  vtkGetObjectMacro(TexturePlaneProperty,vtkProperty);


  void SetWindowLevel(double window, double level);
  void GetWindowLevel(double wl[2]);

  int GetCursorData(double xyzv[4]);


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


  void SetInteraction(int interact);
  vtkGetMacro(Interaction,int);
  vtkBooleanMacro(Interaction,int);


  enum
  {
    CURSOR_ACTION       = 0,
    SLICE_MOTION_ACTION = 1,
    WINDOW_LEVEL_ACTION = 2
  };
  //ETX
  vtkSetClampMacro(LeftButtonAction,int, CURSOR_ACTION, WINDOW_LEVEL_ACTION);
  vtkGetMacro(LeftButtonAction, int);
  vtkSetClampMacro(MiddleButtonAction,int, CURSOR_ACTION, WINDOW_LEVEL_ACTION);
  vtkGetMacro(MiddleButtonAction, int);
  vtkSetClampMacro(RightButtonAction,int, CURSOR_ACTION, WINDOW_LEVEL_ACTION);
  vtkGetMacro(RightButtonAction, int);


  enum
  {
    NO_MODIFIER         = 0,
    SHIFT_MODIFIER      = 1,
    CONTROL_MODIFIER    = 2
  };
  //ETX
  vtkSetClampMacro(LeftButtonAutoModifier,int, SHIFT_MODIFIER, CONTROL_MODIFIER);
  vtkGetMacro(LeftButtonAutoModifier, int);
  vtkSetClampMacro(MiddleButtonAutoModifier,int, SHIFT_MODIFIER, CONTROL_MODIFIER);
  vtkGetMacro(MiddleButtonAutoModifier, int);
  vtkSetClampMacro(RightButtonAutoModifier,int, SHIFT_MODIFIER, CONTROL_MODIFIER);
  vtkGetMacro(RightButtonAutoModifier, int);

protected:
  vtkImagePlaneWidget();
  ~vtkImagePlaneWidget();

  int TextureVisibility;
  
  int LeftButtonAction;
  int MiddleButtonAction;
  int RightButtonAction;

  int LeftButtonAutoModifier;
  int MiddleButtonAutoModifier;
  int RightButtonAutoModifier;

  //BTX
  enum
  {
    NO_BUTTON     = 0,
    LEFT_BUTTON   = 1,
    MIDDLE_BUTTON = 2,
    RIGHT_BUTTON  = 3
  };
  //ETX
  int LastButtonPressed;

  //BTX - manage the state of the widget
  int State;
  enum WidgetState
  {
    Start=0,
    Cursoring,
    WindowLevelling,
    Pushing,
    Spinning,
    Rotating,
    Moving,
    Scaling,
    Outside
  };
  //ETX

  // Handles the events
  static void ProcessEvents(vtkObject* object,
                            unsigned long event,
                            void* clientdata,
                            void* calldata);

  // internal utility method that adds observers to the RenderWindowInteractor
  // so that our ProcessEvents is eventually called.  this method is called
  // by SetEnabled as well as SetInteraction
  void AddObservers();

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

  virtual void StartCursor();
  virtual void StopCursor();
  virtual void StartSliceMotion();
  virtual void StopSliceMotion();
  virtual void StartWindowLevel();
  virtual void StopWindowLevel();

  // controlling ivars
  int   Interaction; // Is the widget responsive to mouse events  
  int   PlaneOrientation;
  int   RestrictPlaneToVolume;
  double OriginalWindow;
  double OriginalLevel;
  double CurrentWindow;
  double CurrentLevel;
  int   ResliceInterpolate;
  int   TextureInterpolate;
  int   UserControlledLookupTable;
  int   DisplayText;

  // The geometric represenation of the plane and it's outline
  vtkPlaneSource    *PlaneSource;
  double              Normal[3]; // plane normal normalized
  vtkPolyData       *PlaneOutlinePolyData;
  vtkActor          *PlaneOutlineActor;
  vtkPolyDataMapper *PlaneOutlineMapper;
  void               HighlightPlane(int highlight);
  void               GeneratePlaneOutline();

  // Re-builds the plane outline based on the plane source
  void BuildRepresentation();

  // Do the picking
  vtkCellPicker *PlanePicker;

  // Methods to manipulate the plane
  void WindowLevel(int X, int Y);
  void Push(double *p1, double *p2);
  void Spin(double *p1, double *p2);
  void Rotate(double *p1, double *p2, double *vpn);
  void Scale(double *p1, double *p2, int X, int Y);
  void Translate(double *p1, double *p2);

  vtkImageData         *ImageData;
  vtkImageReslice      *Reslice;
  vtkMatrix4x4         *ResliceAxes;
  vtkTransform         *Transform;
  vtkTextureMapToPlane *TexturePlaneCoords;
  vtkPolyDataMapper    *TexturePlaneMapper;
  vtkActor             *TexturePlaneActor;
  vtkImageMapToColors  *ColorMap;
  vtkTexture           *Texture;
  vtkLookupTable       *LookupTable;
  vtkLookupTable       *CreateDefaultLookupTable();

  // Properties used to control the appearance of selected objects and
  // the manipulator in general.  The plane property is actually that for
  // the outline.  The TexturePlaneProperty can be used to control the
  // lighting etc. of the resliced image data.
  vtkProperty   *PlaneProperty;
  vtkProperty   *SelectedPlaneProperty;
  vtkProperty   *CursorProperty;
  vtkProperty   *MarginProperty;
  vtkProperty   *TexturePlaneProperty;
  void           CreateDefaultProperties();

  // Reslice and texture management
  void UpdateNormal();
  void UpdateOrigin();
  void GenerateTexturePlane();

  // The cross-hair cursor
  vtkPolyData       *CursorPolyData;
  vtkPolyDataMapper *CursorMapper;
  vtkActor          *CursorActor;
  double             CurrentCursorPosition[3];
  double             CurrentImageValue; // Set to VTK_DOUBLE_MAX when invalid
  void               GenerateCursor();
  void               UpdateCursor(int,int);
  void               ActivateCursor(int);
  int                UpdateContinuousCursor(double *q);
  int                UpdateDiscreteCursor(double *q);
  int                UseContinuousCursor;

  // The text to display W/L, image data
  vtkTextActor *TextActor;
  char          TextBuff[128];
  void          GenerateText();
  void          ManageTextDisplay();
  void          ActivateText(int);

  // Oblique reslice control
  double RotateAxis[3];
  double RadiusVector[3];
  void  AdjustState();

  // Visible margins to assist user interaction
  vtkPolyData       *MarginPolyData;
  vtkPolyDataMapper *MarginMapper;
  vtkActor          *MarginActor;
  int                MarginSelectMode;
  void               GenerateMargins();
  void               UpdateMargins();
  void               ActivateMargins(int);

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

#endif

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