100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: winsplit.hxx
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//
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// Contents:
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//
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// Classes: CTableWindowSplit
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//
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// Functions:
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//
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// History: 1-08-95 srikants Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include <bigtable.hxx>
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#include "tblwindo.hxx"
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class CSortSet;
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//+---------------------------------------------------------------------------
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//
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// Class: CTableWindowSplit
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//
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// Purpose: The class which drives splitting a CTableWindow into two
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// windows.
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//
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// History: 2-07-95 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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class CTableWindowSplit
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{
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public:
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CTableWindowSplit( CTableWindow & srcWindow,
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ULONG iSplitQueryRowIndex,
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ULONG segIdLeft, ULONG segIdRight,
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BOOL fIsLastSegment );
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~CTableWindowSplit();
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void CreateTargetWindows();
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void DoSplit();
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void TransferTargetWindows( CTableWindow ** ppLeft,
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CTableWindow ** ppRight );
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private:
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CTableWindow & _srcWindow; // Source window to split.
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CSortSet * _pSortSet; // Pointer to the sort set.
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CTableWindow * _pLeftWindow; // Target left window.
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CTableWindow * _pRightWindow; // Target right window.
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CRowIndex & _srcQueryRowIndex; // RowIndex used by query to add
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// rows.
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CRowIndex & _srcClientRowIndex; // RowIndex used by the client to
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// to retrieve rows.
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ULONG _iSplitQueryRowIndex; // Split offset in the query row
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// index.
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LONG _iSplitClientRowIndex; // Split offset in the source
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// visible row index.
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ULONG _segIdLeft; // Segment Id of the left window
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ULONG _segIdRight; // Segment Id of the right window
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BOOL _fIsLastSegment; // Is the source window the last
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// segment in the table.
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void _SimpleSplit();
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void _CopyWithoutNotifications( CTableWindow & destWindow, CRowIndex & srcRowIndex,
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ULONG iStartRowIndex, ULONG iEndRowIndex );
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void _CopyWithNotifications( CTableWindow & destWindow,
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ULONG iStartQueryRowIndex, ULONG iEndQueryRowIndex,
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LONG iStartClientRowIndex, LONG iEndClientRowIndex );
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void _CopyWatchRegions();
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inline BOOL _IsOffsetInLeftWindow( long iOffset );
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};
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