YiEventHandler.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_EVENT_HANDLER_H_
#define _YI_EVENT_HANDLER_H_

#include "framework/YiPredef.h"
#include "utility/YiLazy.h"

#include <memory>

class CYIEventHandlerProxy;
class CYIEventFilter;
class CYIEventFilterProxy;
class CYIEvent;
class CYIEventDispatcher;
class CYIMutex;

class CYIEventHandler
{
    friend class CYIEventDispatcher;

    typedef std::vector<std::shared_ptr<CYIEventFilterProxy>> YI_EVENT_FILTER_LIST;

public:
    CYIEventHandler();
    CYIEventHandler(const CYIEventHandler &);
    virtual ~CYIEventHandler();

    CYIEventHandler &operator=(const CYIEventHandler &);

    bool RegisterEventFilter(CYIEventFilter *pFilter);
    
    bool UnregisterEventFilter(CYIEventFilter *pFilter);
    
    bool PreFilter(const std::shared_ptr<CYIEventDispatcher> &pDispatcher, CYIEvent *pEvent);

    bool PostFilter(const std::shared_ptr<CYIEventDispatcher> &pDispatcher, CYIEvent *pEvent);

    bool AreEventsEnabled() const;
    
    void    EnableEvents(bool bEnable);
    
    
    virtual bool HandleEvent(const std::shared_ptr<CYIEventDispatcher> &pDispatcher, CYIEvent *pEvent) = 0;

protected:
    bool m_bEnableEvents;

private:
    CYILazy<CYIMutex> m_filterList;
    std::shared_ptr<CYIEventHandlerProxy> m_pEventHandlerProxy;
    YI_EVENT_FILTER_LIST m_eventFilterList;

};

#endif /* _YI_EVENT_HANDLER_H_ */