---

Hybrid/vtk3DWidget.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtk3DWidget.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 __vtk3DWidget_h
#define __vtk3DWidget_h

#include "vtkInteractorObserver.h"

class vtkDataSet;
class vtkProp3D;

class VTK_HYBRID_EXPORT vtk3DWidget : public vtkInteractorObserver
{
public:
  vtkTypeRevisionMacro(vtk3DWidget,vtkInteractorObserver);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual void PlaceWidget(float bounds[6]) = 0;
  void PlaceWidget();
  void PlaceWidget(float xmin, float xmax, float ymin, float ymax, 
                   float zmin, float zmax);


  virtual void SetProp3D(vtkProp3D*);
  vtkGetObjectMacro(Prop3D,vtkProp3D);
  

  virtual void SetInput(vtkDataSet*);
  vtkGetObjectMacro(Input,vtkDataSet);
  

  vtkSetClampMacro(PlaceFactor,float,0.01,VTK_LARGE_FLOAT);
  vtkGetMacro(PlaceFactor,float);


  vtkSetClampMacro(HandleSize,float,0.001,0.5);
  vtkGetMacro(HandleSize,float);

protected:
  vtk3DWidget();
  ~vtk3DWidget();

  // Used to position and scale the widget initially
  vtkProp3D *Prop3D;
  vtkDataSet *Input;
  
  //has the widget ever been placed
  float PlaceFactor;
  int Placed; 
  void AdjustBounds(float bounds[6], float newBounds[6], float center[3]);
  
  //control the size of handles (if there are any)
  float InitialBounds[6];
  float InitialLength;
  float HandleSize;
  float SizeHandles(float factor);
  virtual void SizeHandles() {}//subclass in turn invokes parent's SizeHandles()
  
  //used to track the depth of the last pick; also interacts with handle sizing
  int   ValidPick;
  float LastPickPosition[3];

private:
  vtk3DWidget(const vtk3DWidget&);  // Not implemented.
  void operator=(const vtk3DWidget&);  // Not implemented.
  
};

#endif

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