vtkAffineRepresentation.h

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

  Program:   Visualization Toolkit
  Module:    vtkAffineRepresentation.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 vtkAffineRepresentation_h
#define vtkAffineRepresentation_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkWidgetRepresentation.h"

class vtkTransform;

class VTKINTERACTIONWIDGETS_EXPORT vtkAffineRepresentation : public vtkWidgetRepresentation
{
public:

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

  virtual void GetTransform(vtkTransform *t) = 0;


  vtkSetClampMacro(Tolerance,int,1,100);
  vtkGetMacro(Tolerance,int);

  // Enums define the state of the representation relative to the mouse pointer
  // position. Used by ComputeInteractionState() to communicate with the
  // widget.
  enum _InteractionState
  {
    Outside=0, Rotate, Translate, TranslateX, TranslateY, ScaleWEdge, ScaleEEdge,
    ScaleNEdge, ScaleSEdge, ScaleNE, ScaleSW, ScaleNW, ScaleSE,
    ShearEEdge, ShearWEdge, ShearNEdge, ShearSEdge,
    MoveOriginX, MoveOriginY, MoveOrigin
  };

  virtual void ShallowCopy(vtkProp *prop);

protected:
  vtkAffineRepresentation();
  ~vtkAffineRepresentation();

  // The tolerance for selecting different parts of the widget.
  int Tolerance;

  // The internal transformation matrix
  vtkTransform *Transform;

private:
  vtkAffineRepresentation(const vtkAffineRepresentation&) VTK_DELETE_FUNCTION;
  void operator=(const vtkAffineRepresentation&) VTK_DELETE_FUNCTION;
};

#endif