GUIObserver.h

/*
* Copyright (C) TES Electronic Solutions GmbH,
* All Rights Reserved.
* Contact: info@guiliani.de
*
* This file is part of the Guiliani HMI framework
* for the development of graphical user interfaces on embedded systems.
*/
 
#ifndef GUIOBSERVER__H_
#define GUIOBSERVER__H_
 
#include "eC_TList_doubleLinked.h"
#include "GUIValue.h"
 
class CGUISubject;
class CGUIObject;
 
 
class CGUIObserver
{
    friend class CGUISubject; 
 
public:
    CGUIObserver() : m_bAutoDelete(false) {}
 
    virtual ~CGUIObserver();
 
    virtual void OnNotification() {}
 
    virtual void OnNotification (const eC_String& kMessage) {}
 
    virtual void OnNotification(const CGUIObject* const pkUpdatedObject) {}
 
    virtual void OnNotification(
        const CGUIValue& kObservedValue,
        const CGUIObject* const pkUpdatedObject,
        const eC_UInt uiX = 0,
        const eC_UInt uiY = 0) {}
 
    const eC_TListDoubleLinked<CGUISubject*>& GetSubjectList() const
    {
        return m_kSubjectList;
    }
 
    void SetAutoDelete(const eC_Bool bAutoDelete)
    {
        m_bAutoDelete = bAutoDelete;
    }
 
protected:
 
    virtual void RemoveSubject(CGUISubject* pSubjectToRemove);
 
    virtual void AddSubject(CGUISubject* pSubjectToAdd);
 
private:
 
    CGUIObserver(const CGUIObserver& kSource);
 
    CGUIObserver& operator=(const CGUIObserver& kSource);
 
    eC_TListDoubleLinked<CGUISubject*> m_kSubjectList;
 
    eC_Bool     m_bAutoDelete;
};
 
#endif