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win/rfb_win32/RegConfig.h

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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- RegConfig.h
+
+// Class which monitors the registry and reads in the registry settings
+// whenever they change, or are added or removed.
+
+#ifndef __RFB_WIN32_REG_CONFIG_H__
+#define __RFB_WIN32_REG_CONFIG_H__
+
+#include <os/Thread.h>
+
+#include <rfb/Configuration.h>
+#include <rfb_win32/Registry.h>
+#include <rfb_win32/EventManager.h>
+#include <rfb_win32/Handle.h>
+
+namespace rfb {
+
+  namespace win32 {
+
+    class RegConfig : EventHandler {
+    public:
+      RegConfig(EventManager* em);
+      ~RegConfig();
+
+      // Specify the registry key to read Configuration items from
+      bool setKey(const HKEY rootkey, const TCHAR* keyname);
+
+      // Support for a callback, run in the RegConfig host thread whenever
+      // the registry configuration changes
+      class Callback {
+      public:
+        virtual ~Callback() {}
+        virtual void regConfigChanged() = 0;
+      };
+      void setCallback(Callback* cb) { callback = cb; }
+
+      // Read entries from the specified key into the Configuration
+      static void loadRegistryConfig(RegKey& key);
+    protected:
+      // EventHandler interface and trigger event
+      virtual void processEvent(HANDLE event);
+
+      EventManager* eventMgr;
+      Handle event;
+      Callback* callback;
+      RegKey key;
+    };
+
+    class RegConfigThread : os::Thread {
+    public:
+      RegConfigThread();
+      ~RegConfigThread();
+
+      // Start the thread, reading from the specified key
+      bool start(const HKEY rootkey, const TCHAR* keyname);
+    protected:
+      virtual void worker();
+      EventManager eventMgr;
+      RegConfig config;
+      DWORD thread_id;
+    };
+
+  };
+
+};
+
+#endif // __RFB_WIN32_REG_CONFIG_H__