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diff --git a/src/messaging/events.hpp b/src/messaging/events.hpp
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+++ b/src/messaging/events.hpp
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+//
+// VMime library (http://vmime.sourceforge.net)
+// Copyright (C) 2002-2004 Vincent Richard <[email protected]>
+//
+// This program 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 program 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 program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+
+#ifndef VMIME_MESSAGING_EVENTS_HPP_INCLUDED
+#define VMIME_MESSAGING_EVENTS_HPP_INCLUDED
+
+
+#include <vector>
+
+#include "../utility/path.hpp"
+
+
+namespace vmime {
+namespace messaging {
+
+class folder;
+
+namespace events {
+
+
+//
+// messageCountEvent
+//
+
+class messageCountEvent
+{
+public:
+
+	enum Types
+	{
+		TYPE_ADDED,     // new messages
+		TYPE_REMOVED    // expunged messages: renumbering
+	};
+
+
+	messageCountEvent(class folder* folder, const Types type, const std::vector <int>& nums);
+
+	const class folder* folder() const;
+	const Types type() const;
+	const std::vector <int>& numbers() const;
+
+	void dispatch(class messageCountListener* listener) const;
+
+private:
+
+	class folder* m_folder;
+	const Types m_type;
+	std::vector <int> m_nums;
+};
+
+
+class messageCountListener
+{
+protected:
+
+	virtual ~messageCountListener() { }
+
+public:
+
+	virtual void messagesAdded(const messageCountEvent& event) = 0;
+	virtual void messagesRemoved(const messageCountEvent& event) = 0;
+};
+
+
+//
+// messageChangedEvent
+//
+
+class messageChangedEvent
+{
+public:
+
+	enum Types
+	{
+		TYPE_FLAGS    // flags changed
+	};
+
+
+	messageChangedEvent(class folder* folder, const Types type, const std::vector <int>& nums);
+
+	const class folder* folder() const;
+	const Types type() const;
+	const std::vector <int>& numbers() const;
+
+	void dispatch(class messageChangedListener* listener) const;
+
+private:
+
+	class folder* m_folder;
+	const Types m_type;
+	std::vector <int> m_nums;
+};
+
+
+class messageChangedListener
+{
+protected:
+
+	virtual ~messageChangedListener() { }
+
+public:
+
+	virtual void messageChanged(const messageChangedEvent& event) = 0;
+};
+
+
+//
+// folderEvent
+//
+
+class folderEvent
+{
+public:
+
+	enum Types
+	{
+		TYPE_CREATED,   // a folder was created
+		TYPE_DELETED,   // a folder was deleted
+		TYPE_RENAMED    // a folder was renamed
+	};
+
+
+	folderEvent(class folder* folder, const Types type, const utility::path& oldPath, const utility::path& newPath);
+
+	const class folder* folder() const;
+	const Types type() const;
+
+	void dispatch(class folderListener* listener) const;
+
+private:
+
+	class folder* m_folder;
+	const Types m_type;
+	const utility::path m_oldPath;
+	const utility::path m_newPath;
+};
+
+
+class folderListener
+{
+protected:
+
+	virtual ~folderListener() { }
+
+public:
+
+	virtual void folderCreated(const folderEvent& event) = 0;
+	virtual void folderRenamed(const folderEvent& event) = 0;
+	virtual void folderDeleted(const folderEvent& event) = 0;
+};
+
+
+} // events
+} // messaging
+} // vmime
+
+
+#endif // VMIME_MESSAGING_EVENTS_HPP_INCLUDED