add support for persistent controls

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58529 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/persist.cpp

@@ -0,0 +1,109 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/common/persist.cpp
+// Purpose:     common persistence support classes
+// Author:      Vadim Zeitlin
+// Created:     2009-01-20
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif // WX_PRECOMP
+
+#include "wx/persist.h"
+
+// ============================================================================
+// wxPersistenceManager implementation
+// ============================================================================
+
+/* static */
+wxPersistenceManager& wxPersistenceManager::Get()
+{
+    static wxPersistenceManager s_manager;
+
+    return s_manager;
+}
+
+wxString
+wxPersistenceManager::GetKey(const wxPersistentObject& who,
+                             const wxString& name) const
+{
+    wxString key("Persistent_Options"); // TODO: make this configurable
+    key << wxCONFIG_PATH_SEPARATOR << who.GetKind()
+        << wxCONFIG_PATH_SEPARATOR << who.GetName()
+        << wxCONFIG_PATH_SEPARATOR << name;
+
+    return key;
+}
+
+wxPersistentObject *wxPersistenceManager::Find(void *obj) const
+{
+    const wxPersistentObjectsMap::const_iterator
+        it = m_persistentObjects.find(obj);
+    return it == m_persistentObjects.end() ? NULL : it->second;
+}
+
+wxPersistentObject *
+wxPersistenceManager::Register(void *obj, wxPersistentObject *po)
+{
+    if ( wxPersistentObject *old = Find(obj) )
+    {
+        wxFAIL_MSG( "object is already registered" );
+
+        delete po; // still avoid the memory leaks
+        return old;
+    }
+
+    m_persistentObjects[obj] = po;
+
+    return po;
+}
+
+void wxPersistenceManager::Unregister(void *obj)
+{
+    wxPersistentObjectsMap::iterator it = m_persistentObjects.find(obj);
+    wxCHECK_RET( it != m_persistentObjects.end(), "not registered" );
+
+    wxPersistentObject * const po = it->second;
+    m_persistentObjects.erase(it);
+    delete po;
+}
+
+void wxPersistenceManager::Save(void *obj)
+{
+    if ( !m_doSave )
+        return;
+
+    wxPersistentObjectsMap::iterator it = m_persistentObjects.find(obj);
+    wxCHECK_RET( it != m_persistentObjects.end(), "not registered" );
+
+    it->second->Save();
+}
+
+bool wxPersistenceManager::Restore(void *obj)
+{
+    if ( !m_doRestore )
+        return false;
+
+    wxPersistentObjectsMap::iterator it = m_persistentObjects.find(obj);
+    wxCHECK_MSG( it != m_persistentObjects.end(), false, "not registered" );
+
+    return it->second->Restore();
+}
+