iupdatehandler.h

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 //------------------------------------------------------------------------
// Project     : Steinberg Module Architecture SDK
//
// Category    : Basic Host Service Interfaces
// Filename    : pluginterfaces/base/iupdatehandler.h
// Created by  : Steinberg, 01/2004
// Description : Update handling
//
//-----------------------------------------------------------------------------
// This file is part of a Steinberg SDK. It is subject to the license terms
// in the LICENSE file found in the top-level directory of this distribution
// and at www.steinberg.net/sdklicenses. 
// No part of the SDK, including this file, may be copied, modified, propagated,
// or distributed except according to the terms contained in the LICENSE file.
//-----------------------------------------------------------------------------
 
#pragma once
 
#include "pluginterfaces/base/funknown.h"
 
namespace Steinberg {
 
class IDependent;
 
//------------------------------------------------------------------------
class IUpdateHandler: public FUnknown
{
public:
//------------------------------------------------------------------------
    virtual tresult PLUGIN_API addDependent (FUnknown* object, IDependent* dependent) = 0;
    
    virtual tresult PLUGIN_API removeDependent (FUnknown* object, IDependent* dependent) = 0;
 
    virtual tresult PLUGIN_API triggerUpdates (FUnknown* object, int32 message) = 0;
 
    virtual tresult PLUGIN_API deferUpdates (FUnknown* object, int32 message) = 0;
    static const FUID iid;
};
 
DECLARE_CLASS_IID (IUpdateHandler, 0xF5246D56, 0x86544d60, 0xB026AFB5, 0x7B697B37)
 
//------------------------------------------------------------------------
class IDependent: public FUnknown
{
public:
//------------------------------------------------------------------------
    virtual void PLUGIN_API update (FUnknown* changedUnknown, int32 message) = 0;
 
    enum ChangeMessage 
    {
        kWillChange,
        kChanged,
        kDestroyed,
        kWillDestroy,
 
        kStdChangeMessageLast = kWillDestroy
    };
    //------------------------------------------------------------------------
    static const FUID iid;
};
 
DECLARE_CLASS_IID (IDependent, 0xF52B7AAE, 0xDE72416d, 0x8AF18ACE, 0x9DD7BD5E)
 
//------------------------------------------------------------------------
} // namespace Steinberg