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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ *
+ * Ingen 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.
+ *
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MIDILEARNEVENT_H
+#define MIDILEARNEVENT_H
+
+#include "QueuedEvent.hpp"
+#include "MidiControlNode.hpp"
+#include "types.hpp"
+#include <string>
+using std::string;
+
+namespace Ingen {
+
+class NodeImpl;
+class ControlChangeEvent;
+
+
+/** Response event for a MIDI learn.
+ *
+ * This is a trivial event that sends a control change in it's post_process
+ * method (used by MidiLearnEvent to notify clients when the learn happens)
+ */
+class MidiLearnResponseEvent : public Event
+{
+public:
+ MidiLearnResponseEvent(Engine& engine, const string& port_path, SampleCount timestamp)
+ : Event(engine, SharedPtr<Responder>(), timestamp),
+ _port_path(port_path),
+ _value(0.0f)
+ {}
+
+ void set_value(Sample val) { _value = val; }
+ void post_process();
+
+private:
+ string _port_path;
+ Sample _value;
+};
+
+
+
+/** A MIDI learn event.
+ *
+ * This creates a MidiLearnResponseEvent and passes it to the learning node, which
+ * will push it to the post-processor once the learn happens in order to reply
+ * to the client with the new port (learned controller) value.
+ *
+ * \ingroup engine
+ */
+class MidiLearnEvent : public QueuedEvent
+{
+public:
+ MidiLearnEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& node_path);
+
+ void pre_process();
+ void execute(ProcessContext& context);
+ void post_process();
+
+private:
+ const string _node_path;
+ NodeImpl* _node;
+
+ /// Event to respond with when learned
+ MidiLearnResponseEvent* _response_event;
+};
+
+
+} // namespace Ingen
+
+#endif // MIDILEARNEVENT_H