SignElement.h

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

#include <vector>
#include <map>
#include <vtkObject.h>

#include <SignDLL.h>

class SignContext;
class SignElement;
class SignCompositeWidget;

typedef std::map<SignElement*,bool> ElementFlagMap;
typedef std::vector<SignElement*> ElementVector;

class SIGN_EXPORT SignElement : public vtkObject
{
  friend class SignElementPreviousButton;

 public:
  vtkTypeRevisionMacro(SignElement,vtkObject);

        void SetContext(SignContext*);

        bool CheckInputs();

        virtual bool ActivateElement()=0;
  virtual bool DeActivateElement() {return false;}

        void AddInput(SignElement* element, bool status=false);

        void AddToDeactivateList(SignElement *element);

        bool IsActive();

        bool IsCheckPoint();
  void IsCheckPoint(bool val);

        std::string GetTitle();
  void SetTitle(std::string title_);
  SignCompositeWidget* GetWidget();


 protected:
  SignElement();
  ~SignElement();

  SignContext* context;

  void Complete();
  void DeComplete();


  static void OnElementReady(vtkObject *caller,unsigned long event, void* data,void*calldata);
  static void OnElementNotReady(vtkObject *caller,unsigned long event, void* data,void*calldata);

  SignElement(const SignElement&);  // Not implemented.
  void operator=(const SignElement&);  // Not implemented.

  bool active;
  SignCompositeWidget* widget;
  bool ischeckpoint;

 private:
  ElementFlagMap InputElements;
  ElementVector OutputElements;
  ElementVector ObsoleteWhenReady;
  std::string title;
};

#endif

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