export filter for export plugins

include/ExportFilter.h

@@ -0,0 +1,64 @@
+/*
+ * ExportFilter.h - declaration of class ExportFilter, the base-class for all
+ *                  file export filters
+ *
+ * Copyright (c) 2006-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ *
+ * This file is part of LMMS - http://lmms.io
+ *
+ * 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 (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef EXPORT_FILTER_H
+#define EXPORT_FILTER_H
+
+#include <QtCore/QFile>
+
+#include "TrackContainer.h"
+#include "Plugin.h"
+
+
+class EXPORT ExportFilter : public Plugin
+{
+public:
+	ExportFilter( const Descriptor * _descriptor ) : Plugin( _descriptor, NULL ) {}
+	virtual ~ExportFilter() {}
+
+
+	virtual bool tryExport( const TrackContainer::TrackList &tracks, int tempo, const QString &filename ) = 0;
+protected:
+
+	virtual void saveSettings( QDomDocument &, QDomElement & )
+	{
+	}
+
+	virtual void loadSettings( const QDomElement & )
+	{
+	}
+
+	virtual QString nodeName() const
+	{
+		return "import_filter";
+	}
+
+
+private:
+
+} ;
+
+
+#endif