wxWidgets/include/wx/msw/registry.h

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///////////////////////////////////////////////////////////////////////////////
// Name: msw/registry.h
// Purpose: Registry classes and functions
// Author: Vadim Zeitlin
// Modified by:
// Created: 03.04.198
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _REGISTRY_H
#define _REGISTRY_H
#ifdef __GNUG__
#pragma interface "registry.h"
#endif
// ----------------------------------------------------------------------------
// mutable hack (see also registry.cpp)
// ----------------------------------------------------------------------------
#if wxUSE_MUTABLE
#define MUTABLE mutable
#else
#define MUTABLE
#endif
// ----------------------------------------------------------------------------
// types used in this module
// ----------------------------------------------------------------------------
/*
#ifndef HKEY_DEFINED
#define HKEY_DEFINED
#define HKEY unsigned long
#endif
*/
typedef unsigned long ulong;
// ----------------------------------------------------------------------------
// class wxRegKey encapsulates window HKEY handle
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxRegKey
{
public:
// NB: do _not_ change the values of elements in these enumerations!
// registry value types (with comments from winnt.h)
enum ValueType
{
Type_None, // No value type
Type_String, // Unicode nul terminated string
#ifdef __WIN32__
Type_Expand_String, // Unicode nul terminated string
// (with environment variable references)
Type_Binary, // Free form binary
Type_Dword, // 32-bit number
Type_Dword_little_endian, // 32-bit number (same as Type_DWORD)
Type_Dword_big_endian, // 32-bit number
Type_Link, // Symbolic Link (unicode)
Type_Multi_String, // Multiple Unicode strings
Type_Resource_list, // Resource list in the resource map
Type_Full_resource_descriptor, // Resource list in the hardware description
Type_Resource_requirements_list // ???
#endif //WIN32
};
// predefined registry keys
enum StdKey
{
HKCR // classes root
#ifdef __WIN32__
, HKCU, // current user
HKLM, // local machine
HKUSR, // users
HKPD // performance data (@@ NT only?)
#if WINVER >= 0x0400
, HKCC, // current config
HKDD // dynamic data
#endif // Winver
#endif // Win32/16
};
// information about standard (predefined) registry keys
// number of standard keys
static const size_t nStdKeys;
// get the name of a standard key
static const wxChar *GetStdKeyName(size_t key);
// get the short name of a standard key
static const wxChar *GetStdKeyShortName(size_t key);
// get StdKey from root HKEY
static StdKey GetStdKeyFromHkey(WXHKEY hkey);
// extacts the std key prefix from the string (return value) and
// leaves only the part after it (i.e. modifies the string passed!)
static StdKey ExtractKeyName(wxString& str);
// ctors
// root key is set to HKCR (the only root key under Win16)
wxRegKey();
// strKey is the full name of the key (i.e. starting with HKEY_xxx...)
wxRegKey(const wxString& strKey);
// strKey is the name of key under (standard key) keyParent
wxRegKey(StdKey keyParent, const wxString& strKey);
// strKey is the name of key under (previously created) keyParent
wxRegKey(const wxRegKey& keyParent, const wxString& strKey);
//
~wxRegKey();
// change key (closes the previously opened key if any)
// the name is absolute, i.e. should start with HKEY_xxx
void SetName(const wxString& strKey);
// the name is relative to the parent key
void SetName(StdKey keyParent, const wxString& strKey);
// the name is relative to the parent key
void SetName(const wxRegKey& keyParent, const wxString& strKey);
// hKey should be opened and will be closed in wxRegKey dtor
void SetHkey(WXHKEY hKey);
// get infomation about the key
// get the (full) key name. Abbreviate std root keys if bShortPrefix.
wxString GetName(bool bShortPrefix = TRUE) const;
// return true if the key exists
bool Exists() const;
// get the info about key (any number of these pointers may be NULL)
#ifdef __GNUWIN32__
bool GetKeyInfo(size_t *pnSubKeys, // number of subkeys
size_t *pnMaxKeyLen, // max len of subkey name
size_t *pnValues, // number of values
size_t *pnMaxValueLen) const;
#else
bool GetKeyInfo(ulong *pnSubKeys, // number of subkeys
ulong *pnMaxKeyLen, // max len of subkey name
ulong *pnValues, // number of values
ulong *pnMaxValueLen) const;
#endif
// return true if the key is opened
bool IsOpened() const { return m_hKey != 0; }
// for "if ( !key ) wxLogError(...)" kind of expressions
operator bool() const { return m_dwLastError == 0; }
// operations on the key itself
// explicitly open the key (will be automatically done by all functions
// which need the key to be opened if the key is not opened yet)
bool Open();
// create the key: will fail if the key already exists and bOkIfExists
bool Create(bool bOkIfExists = TRUE);
// close the key (will be automatically done in dtor)
bool Close();
// deleting keys/values
// deletes this key and all of it's subkeys/values
bool DeleteSelf();
// deletes the subkey with all of it's subkeys/values recursively
bool DeleteKey(const wxChar *szKey);
// deletes the named value (may be NULL to remove the default value)
bool DeleteValue(const wxChar *szValue);
// access to values and subkeys
// get value type
ValueType GetValueType(const wxChar *szValue) const;
// returns TRUE if the value contains a number (else it's some string)
bool IsNumericValue(const wxChar *szValue) const;
// assignment operators set the default value of the key
wxRegKey& operator=(const wxString& strValue)
{ SetValue(NULL, strValue); return *this; }
wxRegKey& operator=(long lValue)
{ SetValue(NULL, lValue); return *this; }
// conversion operators query the default value of the key
operator wxString() const;
// set the string value
bool SetValue(const wxChar *szValue, const wxString& strValue);
// return the string value
bool QueryValue(const wxChar *szValue, wxString& strValue) const;
#ifdef __WIN32__
// set the numeric value
bool SetValue(const wxChar *szValue, long lValue);
// return the numeric value
bool QueryValue(const wxChar *szValue, long *plValue) const;
#endif //Win32
// query existence of a key/value
// return true if value exists
bool HasValue(const wxChar *szKey) const;
// return true if given subkey exists
bool HasSubKey(const wxChar *szKey) const;
// return true if any subkeys exist
bool HasSubkeys() const;
// enumerate values and subkeys
bool GetFirstValue(wxString& strValueName, long& lIndex);
bool GetNextValue (wxString& strValueName, long& lIndex) const;
bool GetFirstKey (wxString& strKeyName , long& lIndex);
bool GetNextKey (wxString& strKeyName , long& lIndex) const;
private:
// no copy ctor/assignment operator
wxRegKey(const wxRegKey& key); // not implemented
wxRegKey& operator=(const wxRegKey& key); // not implemented
WXHKEY m_hKey, // our handle
m_hRootKey; // handle of the top key (i.e. StdKey)
wxString m_strKey; // key name (relative to m_hRootKey)
MUTABLE long m_dwLastError; // last error (0 if none)
};
#endif //_REGISTRY_H