boost::scoped_ptr<ExportPresetSelector> preset_selector;
boost::scoped_ptr<ExportTimespanSelector> timespan_selector;
boost::scoped_ptr<ExportChannelSelector> channel_selector;
boost::scoped_ptr<ExportFileNotebook> file_notebook;
boost::scoped_ptr<ExportPresetSelector> preset_selector;
boost::scoped_ptr<ExportTimespanSelector> timespan_selector;
boost::scoped_ptr<ExportChannelSelector> channel_selector;
boost::scoped_ptr<ExportFileNotebook> file_notebook;