1. added wxMemoryConfig (private) class

2. some minor tweaks to config usage in wxFontMapper


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5599 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/memconf.h

@@ -0,0 +1,54 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/memconf.h
+// Purpose:     wxMemoryConfig class: a wxConfigBase implementation which only
+//              stores the settings in memory (thus they are lost when the
+//              program terminates)
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     22.01.00
+// RCS-ID:      $Id$
+// Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// Licence:     wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+/*
+ * NB: I don't see how this class may possibly be useful to the application
+ *     program (as the settings are lost on program termination), but it is
+ *     handy to have it inside wxWindows. So for now let's say that this class
+ *     is private and should only be used by wxWindows itself - this might
+ *     change in the future.
+ */
+
+#ifndef _WX_MEMCONF_H_
+#define _WX_MEMCONF_H_
+
+// no #pragma interface because no implementation file
+
+#if wxUSE_CONFIG
+
+#include "wx/fileconf.h"   // the base class
+
+// ----------------------------------------------------------------------------
+// wxMemoryConfig: a config class which stores settings in non-persistent way
+// ----------------------------------------------------------------------------
+
+// notice that we inherit from wxFileConfig which already stores its data in
+// memory and just disable file reading/writing - this is probably not optimal
+// and might be changed in future as well (this class will always deriev from
+// wxConfigBase though)
+class wxMemoryConfig : public wxFileConfig
+{
+public:
+    // default (and only) ctor
+    wxMemoryConfig() : wxFileConfig(wxEmptyString,  // default app name
+                                    wxEmptyString,  // default vendor name
+                                    wxEmptyString,  // no local config file
+                                    wxEmptyString,  // no system config file
+                                    0)              // don't use any files
+    {
+    }
+};
+
+#endif // wxUSE_CONFIG
+
+#endif // _WX_MEMCONF_H_