add missing plugin_interest.h file

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@3425 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/plugin_interest.h

@@ -0,0 +1,36 @@
+/*
+    Copyright (C) 2008 Paul Davis 
+
+    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 __gtkardour_plugin_interest_h__
+#define __gtkardour_plugin_interest_h__
+
+#include <vector>
+#include <ardour/plugin.h>
+
+typedef std::vector<ARDOUR::PluginPtr> SelectedPlugins;
+
+class PluginInterestedObject {
+  public:
+	PluginInterestedObject() {}
+	virtual ~PluginInterestedObject() {}
+
+	virtual void use_plugins (const SelectedPlugins&) = 0;
+};
+
+#endif /* __gtkardour_plugin_interest_h__ */