140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
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#ifndef _INC_DSKQUOTA_UNDO_H
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#define _INC_DSKQUOTA_UNDO_H
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///////////////////////////////////////////////////////////////////////////////
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/* File: undo.h
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Description: Declarations for classes associated with the "undo" feature.
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Revision History:
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Date Description Programmer
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-------- --------------------------------------------------- ----------
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09/30/96 Initial creation. BrianAu
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*/
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _INC_DSKQUOTA_H
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# include "dskquota.h"
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#endif
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#ifndef _INC_DSKQUOTA_DYNARRAY_H
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# include "dynarray.h"
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#endif
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class UndoList; // Fwd decl.
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//
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// Virtual base class for all undo actions.
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// UndoList maintains a list of these.
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//
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class UndoAction
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{
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protected:
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PDISKQUOTA_CONTROL m_pQuotaControl; // Ptr to quota control object.
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PDISKQUOTA_USER m_pUser; // User object affected by action.
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UndoList *m_pUndoList; // Containing undo list object.
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LONGLONG m_llLimit; // User object's previous quota limit.
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LONGLONG m_llThreshold; // Previous quota threshold.
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public:
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UndoAction(PDISKQUOTA_USER pUser, LONGLONG llThreshold, LONGLONG llLimit,
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PDISKQUOTA_CONTROL pQuotaControl = NULL);
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~UndoAction(VOID);
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virtual HRESULT Undo(VOID) = 0;
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VOID SetUndoList(UndoList *pUndoList)
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{ m_pUndoList = pUndoList; }
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};
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//
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// Class for restoring a deleted record.
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//
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class UndoDelete : public UndoAction
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{
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public:
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UndoDelete(
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PDISKQUOTA_USER pUser,
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LONGLONG llThreshold,
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LONGLONG llLimit
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) : UndoAction(pUser, llThreshold, llLimit) { }
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HRESULT Undo(VOID);
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};
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//
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// Class for restoring a newly added record (delete it).
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//
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class UndoAdd : public UndoAction
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{
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public:
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UndoAdd(
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PDISKQUOTA_USER pUser,
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PDISKQUOTA_CONTROL pQuotaControl
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) : UndoAction(pUser, 0, 0, pQuotaControl) { }
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HRESULT Undo(VOID);
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};
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//
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// Class for restoring a record's previous settings.
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//
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class UndoModify : public UndoAction
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{
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public:
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UndoModify(
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PDISKQUOTA_USER pUser,
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LONGLONG llThreshold,
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LONGLONG llLimit
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) : UndoAction(pUser, llThreshold, llLimit) { }
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HRESULT Undo(VOID);
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};
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//
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// Container for a set of undo actions.
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//
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class UndoList
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{
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private:
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PointerList m_hList; // List of undo action object ptrs.
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PointerList *m_pUserList; // List of quota user object ptrs.
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HWND m_hwndListView; // Listview we'll update.
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public:
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UndoList(PointerList *pUserList, HWND hwndListView)
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: m_pUserList(pUserList),
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m_hwndListView(hwndListView) { }
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~UndoList(VOID);
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VOID Add(UndoAction *pAction)
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{
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pAction->SetUndoList(this),
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m_hList.Append((LPVOID)pAction);
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}
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HWND GetListViewHwnd(VOID)
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{ return m_hwndListView; }
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PointerList *GetUserList(VOID)
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{ return m_pUserList; }
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VOID Undo(VOID);
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VOID Clear(VOID);
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INT Count(VOID)
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{ return m_hList.Count(); }
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};
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#endif // _INC_DSKQUOTA_UNDO_H
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