IDropDownListOpenCloseHandler.h

//========================================================================================
// 
// $File$
// 
// Owner: Dave Burnard
// 
// $Author$
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// $DateTime$
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// Copyright 1997-2010 Adobe Systems Incorporated. All rights reserved.
// 
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance 
// with the terms of the Adobe license agreement accompanying it. If you have received
// this file from a source other than Adobe, then your use, modification, or 
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//========================================================================================

#ifndef __IDropDownListOpenCloseHandler_h__
#define __IDropDownListOpenCloseHandler_h__

#include "IPMUnknown.h"
#include "widgetid.h"

//========================================================================================
// CLASS IDropDownListOpenCloseHandler
//
// Attach this interface to a DropDownList boss, to add behavior just before the dropdown opens
// and/or just after it closes. These methods are called from the DVDropDownListView impl.
//
//
// In CS5 and earlier this customization was accomplished with a custom IEventHandler override 
// that had to catch the platform menu opening and closing events, and then called 
// the event handler's customized PrepForShowControl or PrepForCloseControl methods. 
//========================================================================================

class IDropDownListOpenCloseHandler : public IPMUnknown
{
public: 
 enum { kDefaultIID = IID_IDROPDOWNLISTOPENCLOSEHANDLER };

 virtual void HandlePreOpenDropDown() = 0;
 
 virtual void HandlePostCloseDropDown() = 0;
};

#endif