124 lines
4.7 KiB
C++
124 lines
4.7 KiB
C++
#ifndef _INC_DSKQUOTA_XBYTES_H
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#define _INC_DSKQUOTA_XBYTES_H
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/* File: xbytes.h
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Description: This module implements a class that coordinates the operation
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between the edit control and combo box used for entering byte values.
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The name "XBytes" is used because the control can represent
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KBytes, MBytes, GBytes etc.
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The cooperation between edit control and combo control is required
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so that the user can enter a byte value in the edit control then
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indicate it's order (KB, MB, GB...) using a selection from the combo box.
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A simple external interface is provided to initially set the
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object's byte value then retrieve the byte value when needed. The
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object's client is also required to call two member functions when
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the parent dialog receives an EN_UPDATE notification and a CBN_SELCHANGE
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message. The XBytes object handles all of the value scaling
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internally.
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Revision History:
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Date Description Programmer
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-------- --------------------------------------------------- ----------
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08/30/96 Initial creation. BrianAu
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10/15/96 Added m_MaxBytes member. BrianAu
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10/22/96 Added ValueInRange() member. BrianAu
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05/29/98 Removed ValueInRange() and m_MaxBytes members. BrianAu
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*/
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const INT MAX_DECIMAL_SEP = 10;
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const INT MAX_NOLIMIT_LEN = 80; // This should be plenty for localization.
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#define MAX_ORDER e_Exa
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#define VALID_ORDER(ord) ((ord) >= e_Byte && (ord) <= MAX_ORDER)
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class XBytes
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{
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private:
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INT64 m_ValueBytes; // Byte value.
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HWND m_hDlg; // Parent dlg.
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DWORD m_idCtlEdit; // Edit control.
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DWORD m_idCtlCombo; // Combo control.
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static TCHAR m_szNoLimit[MAX_NOLIMIT_LEN];
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VOID CommonInit(VOID);
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INLINE BOOL IsCharNumeric(TCHAR ch)
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{ return IsCharAlphaNumeric(ch) && !IsCharAlpha(ch); }
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BOOL StrToInt(LPCTSTR pszValue, INT64 *pIntValue);
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INLINE INT_PTR SendToEditCtl(UINT message, WPARAM wParam, LPARAM lParam)
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{ return SendMessage(GetDlgItem(m_hDlg, m_idCtlEdit), message, wParam, lParam); }
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INLINE INT_PTR SendToCombo(UINT message, WPARAM wParam, LPARAM lParam)
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{ return SendMessage(GetDlgItem(m_hDlg, m_idCtlCombo), message, wParam, lParam); }
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INLINE INT_PTR GetOrderFromCombo(VOID)
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{ return SendToCombo(CB_GETCURSEL, 0, 0) + 1; }
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INLINE INT_PTR SetOrderInCombo(INT iOrder)
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{ return SendToCombo(CB_SETCURSEL, iOrder-1, 0); }
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VOID LoadComboItems(INT64 MaxBytes);
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VOID SetBestDisplay(VOID);
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BOOL Store(INT64 Value, INT xbOrder);
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BOOL Store(LPCTSTR pszValue, INT xbOrder);
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INT64 Fetch(INT64 *pDecimal, INT xbOrder); // Fetch in requested order.
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DWORD Fetch(DWORD *pDecimal, INT *pxbOrder); // Fetch in "best" order.
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bool UndoLastEdit(void);
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static VOID LoadStaticStrings(void);
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static VOID FormatForDisplay(LPTSTR pszDest,
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UINT cchDest,
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DWORD dwWholePart,
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DWORD dwFracPart);
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VOID Enable(BOOL bEnable);
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public:
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// With the exception of e_Byte, these must match the order
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// of the IDS_ORDERKB, IDS_ORDERMB... string resource IDs.
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// There is no IDS_ORDERBYTE string resource.
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enum {e_Byte, e_Kilo, e_Mega, e_Giga, e_Tera, e_Peta, e_Exa};
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XBytes(VOID);
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XBytes(HWND hDlg, DWORD idCtlEdit, DWORD idCtlCombo, INT64 CurrentBytes);
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static double ConvertFromBytes(INT64 ValueBytes, INT xbOrder);
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static INT64 BytesToParts(INT64 ValueBytes, INT64 *pDecimal, INT xbOrder);
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static DWORD BytesToParts(INT64 ValueBytes, LPDWORD pDecimal, INT *pxbOrder);
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static VOID FormatByteCountForDisplay(INT64 Bytes, LPTSTR pszDest, UINT cchDest);
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static VOID FormatByteCountForDisplay(INT64 Bytes, LPTSTR pszDest, UINT cchDest, INT *pOrder);
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static VOID FormatByteCountForDisplay(INT64 Bytes, LPTSTR pszDest, UINT cchDest, INT Order);
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INT64 GetBytes(VOID)
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{ return Fetch(NULL, e_Byte); }
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VOID SetBytes(INT64 Value);
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// EN_xxxx handlers. Client must call this on EN_UPDATE.
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BOOL OnEditNotifyUpdate(LPARAM lParam);
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BOOL OnEditKillFocus(LPARAM lParam);
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// CBN_xxxx handlers. Client must call this on CBN_SELCHANGE.
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BOOL OnComboNotifySelChange(LPARAM lParam);
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BOOL IsEnabled(VOID);
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};
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#endif // _INC_DSKQUOTA_XBYTES_H
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