vtkSeedRepresentation.h

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

  Program:   Visualization Toolkit
  Module:    vtkSeedRepresentation.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 vtkSeedRepresentation_h
#define vtkSeedRepresentation_h

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

class vtkHandleList;
class vtkHandleRepresentation;


class VTKINTERACTIONWIDGETS_EXPORT vtkSeedRepresentation : public vtkWidgetRepresentation
{
public:
  static vtkSeedRepresentation *New();


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


  virtual void GetSeedWorldPosition( unsigned int seedNum, double pos[3] );
  virtual void SetSeedDisplayPosition( unsigned int seedNum, double pos[3] );
  virtual void GetSeedDisplayPosition( unsigned int seedNum, double pos[3] );

  int GetNumberOfSeeds();

  void SetHandleRepresentation( vtkHandleRepresentation *handle );

  vtkHandleRepresentation *GetHandleRepresentation( unsigned int num );


  vtkHandleRepresentation *GetHandleRepresentation()
  {
    return this->HandleRepresentation;
  };


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

  // Used to communicate about the state of the representation
  enum
  {
    Outside = 0,
    NearSeed
  };


  virtual int GetActiveHandle();
  // Returns the id of the seed created, -1 on failure. e is the display position.
  virtual int CreateHandle( double e[2] );
  // Delete last handle created
  virtual void RemoveLastHandle();
  // Delete the currently active handle
  virtual void RemoveActiveHandle();

  virtual void RemoveHandle( int n );


  virtual void BuildRepresentation();
  virtual int ComputeInteractionState( int X, int Y, int modify = 0 );

protected:
  vtkSeedRepresentation();
  ~vtkSeedRepresentation();

  // The handle and the rep used to close the handles
  vtkHandleRepresentation  *HandleRepresentation;
  vtkHandleList            *Handles;

  // Selection tolerance for the handles
  int Tolerance;

  // The active seed (handle) based on the last ComputeInteractionState()
  int ActiveHandle;

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

#endif