Hybrid/vtkImagePlaneWidget.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImagePlaneWidget.h,v $
  Language:  C++

  Copyright (c) 1993-2002 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(float bounds[6]);
  void PlaceWidget()
    {this->Superclass::PlaceWidget();}
  void PlaceWidget(float xmin, float xmax, float ymin, float ymax,
                   float zmin, float zmax)
    {this->Superclass::PlaceWidget(xmin,xmax,ymin,ymax,zmin,zmax);}

  void SetInput(vtkDataSet* input);


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


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


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


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


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

  void GetVector1(float v1[3]);

  void GetVector2(float v2[3]);

  int GetSliceIndex();

  void SetSliceIndex(int index);

  float GetSlicePosition();

  void SetSlicePosition(float 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);

  void GetPolyData(vtkPolyData *pd);

  vtkPolyDataSource* GetPolyDataSource();

  void UpdatePlacement(void);

  vtkTexture *GetTexture();

  vtkImageMapToColors* GetImageMapToColors();


  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 GetWindowLevel(float wl[2]);

  int GetCursorData(float xyzv[4]);


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

protected:
  vtkImagePlaneWidget();
  ~vtkImagePlaneWidget();

//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);

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

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

  // The geometric represenation of the plane and it's outline
  vtkPlaneSource    *PlaneSource;
  float              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;
  vtkDataSetMapper     *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;
  int                CurrentCursorPosition[3];
  float              CurrentImageValue; // Set to VTK_FLOAT_MAX when invalid
  void               GenerateCursor();
  void               UpdateCursor(int,int);
  void               ActivateCursor(int);

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

  // Oblique reslice control
  float RotateAxis[3];
  float 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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