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#ifndef nsIMenuListener_h__
#define nsIMenuListener_h__

#include "nsISupports.h"
#include "nsEvent.h"

class nsIWidget;

// F463E22A-C5A9-4443-9407-2A7CD6634AE1
#define NS_IMENULISTENER_IID      \
{ 0xF463E22A, 0xC5A9, 0x4443, \
  { 0x94, 0x07, 0x2A, 0x7C, 0xD6, 0x63, 0x4A, 0xE1 } }

/**
 *
 * Menu event listener
 * This interface should only be implemented by the menu manager
 * These are registered with nsWindows to receive menu events
 */

class nsIMenuListener : public nsISupports {

  public:
    NS_DECLARE_STATIC_IID_ACCESSOR(NS_IMENULISTENER_IID)

	 /**
     * Processes a menu item selected event
     * @param aMenuEvent See nsGUIEvent.h 
     * @return whether the event was consumed or ignored. See nsEventStatus
     */
    virtual nsEventStatus MenuItemSelected(const nsMenuEvent & aMenuEvent) = 0;

    /**
     * Processes a menu selected event
     * @param aMenuEvent See nsGUIEvent.h 
     * @return whether the event was consumed or ignored. See nsEventStatus
     */
    virtual nsEventStatus MenuSelected(const nsMenuEvent & aMenuEvent) = 0;

    /**
     * Processes a menu deselect event
     * @param aMenuEvent See nsGUIEvent.h 
     * @return whether the event was consumed or ignored. See nsEventStatus
     */
    virtual nsEventStatus MenuDeselected(const nsMenuEvent & aMenuEvent) = 0;

    virtual nsEventStatus MenuConstruct(const nsMenuEvent & aMenuEvent,
                                        nsIWidget* aParentWindow, void* aNode) = 0;

    virtual nsEventStatus MenuDestruct(const nsMenuEvent & aMenuEvent) = 0;
    
    virtual nsEventStatus CheckRebuild(PRBool & aMenuEvent) = 0;
    virtual nsEventStatus SetRebuild(PRBool aMenuEvent) = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIMenuListener, NS_IMENULISTENER_IID)

#endif // nsIMenuListener_h__