dox/Widgets/vtkAffineRepresentation2D.h

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

  Program:   Visualization Toolkit
  Module:    vtkAffineRepresentation2D.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 __vtkAffineRepresentation2D_h
#define __vtkAffineRepresentation2D_h

#include "vtkAffineRepresentation.h"

class vtkProperty2D;
class vtkActor2D;
class vtkPolyDataMapper2D;
class vtkPolyData;
class vtkPoints;
class vtkCellArray;
class vtkTextProperty;
class vtkLeaderActor2D;
class vtkTextMapper;
class vtkActor2D;


class VTK_WIDGETS_EXPORT vtkAffineRepresentation2D : public vtkAffineRepresentation
{
public:
  static vtkAffineRepresentation2D *New();


  vtkTypeMacro(vtkAffineRepresentation2D,vtkAffineRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);


  vtkSetClampMacro(BoxWidth,int,10,VTK_LARGE_INTEGER);
  vtkGetMacro(BoxWidth,int);
  vtkSetClampMacro(CircleWidth,int,10,VTK_LARGE_INTEGER);
  vtkGetMacro(CircleWidth,int);
  vtkSetClampMacro(AxesWidth,int,10,VTK_LARGE_INTEGER);
  vtkGetMacro(AxesWidth,int);


  void SetOrigin(double o[3]) {this->SetOrigin(o[0],o[1],o[2]);}
  void SetOrigin(double ox, double oy, double oz);
  vtkGetVector3Macro(Origin,double);

  virtual void GetTransform(vtkTransform *t);


  void SetProperty(vtkProperty2D*);
  void SetSelectedProperty(vtkProperty2D*);
  void SetTextProperty(vtkTextProperty*);
  vtkGetObjectMacro(Property,vtkProperty2D);
  vtkGetObjectMacro(SelectedProperty,vtkProperty2D);
  vtkGetObjectMacro(TextProperty,vtkTextProperty);
  

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


  virtual void PlaceWidget(double bounds[6]);
  virtual void StartWidgetInteraction(double eventPos[2]);
  virtual void WidgetInteraction(double eventPos[2]);
  virtual void EndWidgetInteraction(double eventPos[2]);
  virtual int ComputeInteractionState(int X, int Y, int modify=0);
  virtual void BuildRepresentation();


  virtual void ShallowCopy(vtkProp *prop);
  virtual void GetActors2D(vtkPropCollection *);
  virtual void ReleaseGraphicsResources(vtkWindow *);
  virtual int RenderOverlay(vtkViewport *viewport);
  
protected:
  vtkAffineRepresentation2D();
  ~vtkAffineRepresentation2D();

  // Methods to manipulate the cursor
  void Translate(double eventPos[2]);
  void Scale(double eventPos[2]);
  void Rotate(double eventPos[2]);
  void Shear(double eventPos[2]);
  void Highlight(int highlight);
  void UpdateText(const char *text, double eventPos[2]);

  // The width of the widget in normalized viewport coordinates.
  int BoxWidth;
  int CircleWidth;
  int AxesWidth;

  // Display text
  int DisplayText;
  
  // Internal variables for bookkeeping (in display coordinates unless noted)
  double CurrentWidth;
  double CurrentRadius;
  double CurrentAxesWidth;

  // The internal transformation matrix
  vtkTransform *CurrentTransform;
  vtkTransform *TotalTransform;
  vtkTransform *TempTransform;
  double Origin[4]; //the current origin in world coordinates
  double DisplayOrigin[3]; //the current origin in display coordinates
  double CurrentTranslation[3]; //translation this movement
  double StartWorldPosition[4]; //Start event position converted to world
  double StartAngle; //The starting angle (always positive)
  double CurrentAngle;
  double CurrentScale[2];
  double CurrentShear[2];
  void   ApplyShear(); //helper method to apply shear to matrix
  
  // Properties used to control the appearance of selected objects and
  // the manipulator in general.
  vtkProperty2D   *Property;
  vtkProperty2D   *SelectedProperty;
  vtkTextProperty *TextProperty;
  void             CreateDefaultProperties();
  double           Opacity;
  double           SelectedOpacity;
  
  // Support picking
  double LastEventPosition[2];
  
  // These are the classes that form the geometric representation -----------
  // The label 
  vtkTextMapper *TextMapper;
  vtkActor2D    *TextActor;
  
  // The outer box
  vtkPoints           *BoxPoints;
  vtkCellArray        *BoxCellArray;
  vtkPolyData         *Box;
  vtkPolyDataMapper2D *BoxMapper;
  vtkActor2D          *BoxActor;

  vtkPoints           *HBoxPoints;
  vtkCellArray        *HBoxCellArray;
  vtkPolyData         *HBox;
  vtkPolyDataMapper2D *HBoxMapper;
  vtkActor2D          *HBoxActor;

  // The circle
  vtkPoints           *CirclePoints;
  vtkCellArray        *CircleCellArray;
  vtkPolyData         *Circle;
  vtkPolyDataMapper2D *CircleMapper;
  vtkActor2D          *CircleActor;

  vtkPoints           *HCirclePoints;
  vtkCellArray        *HCircleCellArray;
  vtkPolyData         *HCircle;
  vtkPolyDataMapper2D *HCircleMapper;
  vtkActor2D          *HCircleActor;
  
  // The translation axes
  vtkLeaderActor2D    *XAxis;
  vtkLeaderActor2D    *YAxis;
  vtkLeaderActor2D    *HXAxis;
  vtkLeaderActor2D    *HYAxis;

private:
  vtkAffineRepresentation2D(const vtkAffineRepresentation2D&);  //Not implemented
  void operator=(const vtkAffineRepresentation2D&);  //Not implemented
};

#endif

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