vtkHoverWidget.h

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

  Program:   Visualization Toolkit
  Module:    vtkHoverWidget.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 vtkHoverWidget_h
#define vtkHoverWidget_h

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


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


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


  vtkSetClampMacro(TimerDuration,int,1,100000);
  vtkGetMacro(TimerDuration,int);

  void SetEnabled(int) override;

  void CreateDefaultRepresentation() override
    {this->WidgetRep = nullptr;}

protected:
  vtkHoverWidget();
  ~vtkHoverWidget() override;

  // The state of the widget

  enum {Start=0,Timing,TimedOut};

  int WidgetState;

  // Callback interface to execute events
  static void MoveAction(vtkAbstractWidget*);
  static void HoverAction(vtkAbstractWidget*);
  static void SelectAction(vtkAbstractWidget*);

  // Subclasses of this class invoke these methods. If a non-zero
  // value is returned, a subclass is handling the event.
  virtual int SubclassHoverAction() {return 0;}
  virtual int SubclassEndHoverAction() {return 0;}
  virtual int SubclassSelectAction() {return 0;}


  int TimerId;
  int TimerDuration;

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

#endif