item.h

此为Insight opc client InfoServerExplorer源程序

/////////////////////////////////////////////////////////////////////////////
//
//  OPC DataAccess VC++ Client:	Item.h
//								(Header File)
//
/////////////////////////////////////////////////////////////////////////////
//
//          Author: Raphael Imhof
//    Initial Date: 11/04/98
//       $Workfile: Item.h $
//       $Revision: 1 $
//           $Date: 7/27/99 5:23p $
//   Target System: Microsoft Windows NT 4.0
//     Environment: Visual C++ 5.0 / OPC DataAccess 1.0/2.0
//         Remarks: 
//
/////////////////////////////////////////////////////////////////////////////
//
//     Description: interface of the CItem class.
//					Encapsulation of item related methods.
//					
//
/////////////////////////////////////////////////////////////////////////////
//
//  History of Changes     (Please remove very old comments and blank lines!)
//            $Log: /IDK/OPCServer/clients/VC++/InfoServerExplorer/Item.h $
// 
// 1     7/27/99 5:23p Imhof
// 
// 1     7/27/99 5:19p Imhof
// 
// 7     1/15/99 6:43p Imhof
// Updated legal notice.
// 
// 6     1/06/99 10:34a Imhof
// Added a changed attribute to the CItem class which is used to optimize
// the content view update.
// 
// 5     12/14/98 4:46p Imhof
// Modifications for OPC 2.0
// 
// 4     11/10/98 2:20p Imhof
// Added file header's.
// 
// 
//  $Nokeywords:$ (To avoid useless search while checking in.)
/////////////////////////////////////////////////////////////////////////////
//  Copyright (C) 1998, Siemens Building Technologies, Inc. Landis Division
//
// SIEMENS BUILDING TECHNOLOGIES, INC. IS PROVIDING THE FOLLOWING
// EXAMPLES OF CODE AS SAMPLE ONLY.
//
// SIEMENS BUILDING TECHNOLOGIES, INC.  MAKES NO REPRESENTATIONS
// OR WARRANTIES OF ANY KIND  WITH RESPECT TO THE VALIDTY OF THE 
// CODES   OR   DESIRED   RESULTS   AND   DISCLAIMS   ALL   SUCH 
// REPRESENTATIONS   AND   WARRANTIES,  INCLUDING  FOR  EXAMPLE, 
// WARRANTIES  OF  MERCHANTABILITY  AND FITNESS FOR A PARTICULAR 
// PURPOSE.    SIEMENS  BUILIDNG  TECHNOLOGIES,  INC.  DOES  NOT 
// REPRESENT  OR  WARRANT  THAT  THE  FOLLOWING CODE SAMPLES ARE 
// ACCURATE, VALID, COMPLETE OR CURRENT.
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_ITEM_H__451D47C7_2B19_11D2_AD89_00104B2C9D06__INCLUDED_)
#define AFX_ITEM_H__451D47C7_2B19_11D2_AD89_00104B2C9D06__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

class CGroup;

#include "base.h"
#include "Group.h"

class CItem : public CBase<IOPCItemMgt>
{
public:
	VARIANT GetValue();
	void SetValue(VARIANT value);
	WORD GetQuality();
	void SetQuality(WORD quality);
	VARTYPE GetDataType();
	void SetDataType(VARTYPE data_type);
	FILETIME GetTimeStamp();
	void SetTimeStamp(FILETIME time_stamp);
	BOOL IsChanged();
	void SetChanged(BOOL bChanged);
	CItem();
	virtual ~CItem();
	CGroup* GetGroup();
	void SetGroup(CGroup* pGroup);

	BOOL CommandSync(CString sValue);
	BOOL CommandAsync(CString sValue);
	BOOL ReadAsync(OPCDATASOURCE dwSource);
	BOOL ReadSync(OPCDATASOURCE dwSource);
	BOOL Cancel(); //async operation cancel
	
	BOOL EditItem();

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CInfoServer)
	public:
	virtual void Serialize(CArchive& ar);
	//}}AFX_VIRTUAL

protected:
	DECLARE_DYNCREATE(CItem)

private:
	BOOL		m_bChanged;
	VARTYPE		m_data_type;
	WORD		m_quality;
	CComVariant m_value;
	FILETIME	m_timeStamp;
	CGroup*		m_pGroup;

};

#endif // !defined(AFX_ITEM_H__451D47C7_2B19_11D2_AD89_00104B2C9D06__INCLUDED_)