+
+/*******************************************************************************
+
+ Copyright (c) 2009, Charles McGarvey
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*******************************************************************************/
+
+#ifndef _DISPATCHER_HH_
+#define _DISPATCHER_HH_
+
+/**
+ * @file dispatcher.hh
+ * Dispatching of information.
+ */
+
+#include <string>
+
+#include <boost/shared_ptr.hpp>
+#include <boost/function.hpp>
+
+#include "singleton.hh"
+
+
+namespace dc {
+
+
+// Subclass this to create more specific notes to dispatch.
+class notification
+{
+public:
+ virtual ~notification();
+};
+
+
+class dispatcher_impl;
+
+class dispatcher : public singleton<dispatcher>
+{
+public:
+ typedef void* handler;
+
+ dispatcher();
+
+ typedef boost::function<void(const notification&)> function;
+
+ handler addHandler(const std::string& message, const function& callback);
+ handler addHandler(const std::string& message, const function& callback,
+ handler id);
+
+ void removeHandler(handler id);
+
+ void dispatch(const std::string& message);
+ void dispatch(const std::string& message, const notification& param);
+
+private:
+ boost::shared_ptr<dispatcher_impl> impl;
+};
+
+
+} // namespace dc
+
+#endif // _DISPATCHER_HH_
+