vtkDistanceWidget.h

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

  Program:   Visualization Toolkit
  Module:    vtkDistanceWidget.h,v

  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 vtkDistanceWidget_h
#define vtkDistanceWidget_h

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

class vtkDistanceRepresentation;
class vtkHandleWidget;
class vtkDistanceWidgetCallback;

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


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

  void SetEnabled(int) override;

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

  vtkDistanceRepresentation* GetDistanceRepresentation()
  {
    return reinterpret_cast<vtkDistanceRepresentation*>(this->WidgetRep);
  }

  void CreateDefaultRepresentation() override;

  void SetProcessEvents(vtkTypeBool) override;

  enum
  {
    Start = 0,
    Define,
    Manipulate
  };


  virtual void SetWidgetStateToStart();
  virtual void SetWidgetStateToManipulate();

  virtual int GetWidgetState() { return this->WidgetState; }

protected:
  vtkDistanceWidget();
  ~vtkDistanceWidget() override;

  // The state of the widget
  int WidgetState;
  int CurrentHandle;

  // Callback interface to capture events when
  // placing the widget.
  static void AddPointAction(vtkAbstractWidget*);
  static void MoveAction(vtkAbstractWidget*);
  static void EndSelectAction(vtkAbstractWidget*);
  static void AddPointAction3D(vtkAbstractWidget*);
  static void MoveAction3D(vtkAbstractWidget*);
  static void EndSelectAction3D(vtkAbstractWidget*);

  // The positioning handle widgets
  vtkHandleWidget* Point1Widget;
  vtkHandleWidget* Point2Widget;
  vtkDistanceWidgetCallback* DistanceWidgetCallback1;
  vtkDistanceWidgetCallback* DistanceWidgetCallback2;

  // Methods invoked when the handles at the
  // end points of the widget are manipulated
  void StartDistanceInteraction(int handleNum);
  void DistanceInteraction(int handleNum);
  void EndDistanceInteraction(int handleNum);

  friend class vtkDistanceWidgetCallback;

private:
  vtkDistanceWidget(const vtkDistanceWidget&) = delete;
  void operator=(const vtkDistanceWidget&) = delete;
};

#endif