SignElementPreviousButton.h

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/*
 *
 * Program:   Slicer Image-Guided Navigator (The SIGN)
 * Module:    $RCSfile: SignElementPreviousButton.h,v $
 */
#ifndef _SIGNELEMENTPREVIOUSBUTTON_H
#define _SIGNELEMENTPREVIOUSBUTTON_H

#include <map>

#include <SignDLL.h>
#include <SignElement.h>

class vtkKWPushButton;


class SIGN_EXPORT SignElementPreviousButton : public SignElement
{
public:
  vtkTypeRevisionMacro(SignElementPreviousButton,SignElement);
  virtual void PrintSelf(ostream& os, vtkIndent indent);
  
  static SignElementPreviousButton* New();
  
        bool ActivateElement();
  bool DeActivateElement();

        void SetPreviousButton(vtkKWPushButton* b);
        void SetFirstElement(SignElement* el);

protected:
  SignElementPreviousButton();
  ~SignElementPreviousButton();
  
  SignElementPreviousButton(const SignElementPreviousButton&);  // Not implemented.
  void operator=(const SignElementPreviousButton&);  // Not implemented.
  
private:
        SignElement* FindActiveCheckpoint(SignElement* start);
        unsigned long pbcbid;
        vtkKWPushButton* previousButton;
        SignElement* firstElement;
        SignElement* lastInactiveCheckpoint;

        static void PreviousButtonCallback(vtkObject *caller, unsigned long, void *data, void *calldata);
};
#endif

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