vtkLineWidget2.h

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

  Program:   Visualization Toolkit
  Module:    vtkLineWidget2.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 vtkLineWidget2_h
#define vtkLineWidget2_h

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

class vtkLineRepresentation;
class vtkHandleWidget;


class VTKINTERACTIONWIDGETS_EXPORT vtkLineWidget2 : public vtkAbstractWidget
{
public:
  static vtkLineWidget2 *New();


  vtkTypeMacro(vtkLineWidget2,vtkAbstractWidget);
  void PrintSelf(ostream& os, vtkIndent indent);

  virtual void SetEnabled(int enabling);

  void SetRepresentation(vtkLineRepresentation *r)
    {this->Superclass::SetWidgetRepresentation(reinterpret_cast<vtkWidgetRepresentation*>(r));}

  vtkLineRepresentation *GetLineRepresentation()
    {return reinterpret_cast<vtkLineRepresentation*>(this->WidgetRep);}

  void CreateDefaultRepresentation();

  virtual void SetProcessEvents(int);

protected:
  vtkLineWidget2();
  ~vtkLineWidget2();

  // Manage the state of the widget
  int WidgetState;
  enum _WidgetState {Start=0,Active};
  int CurrentHandle;

  // These methods handle events
  static void SelectAction(vtkAbstractWidget*);
  static void TranslateAction(vtkAbstractWidget*);
  static void ScaleAction(vtkAbstractWidget*);
  static void EndSelectAction(vtkAbstractWidget*);
  static void MoveAction(vtkAbstractWidget*);

  // The positioning handle widgets
  vtkHandleWidget *Point1Widget; //first end point
  vtkHandleWidget *Point2Widget; //second end point
  vtkHandleWidget *LineHandle; //used when selecting the line

  char ActiveKeyCode;
  vtkCallbackCommand *KeyEventCallbackCommand;
  static void ProcessKeyEvents(vtkObject *, unsigned long, void *, void *);

private:
  vtkLineWidget2(const vtkLineWidget2&) VTK_DELETE_FUNCTION;
  void operator=(const vtkLineWidget2&) VTK_DELETE_FUNCTION;
};

#endif