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diff --git a/gr-qtgui/include/qtgui_time_sink_f.h b/gr-qtgui/include/qtgui_time_sink_f.h
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+++ b/gr-qtgui/include/qtgui_time_sink_f.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2011 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_QTGUI_TIME_SINK_F_H
+#define INCLUDED_QTGUI_TIME_SINK_F_H
+
+#include <Python.h>
+#include <gr_qtgui_api.h>
+#include <gr_sync_block.h>
+#include <gr_firdes.h>
+#include <gri_fft.h>
+#include <qapplication.h>
+#include <timedisplayform.h>
+
+class qtgui_time_sink_f;
+typedef boost::shared_ptr<qtgui_time_sink_f> qtgui_time_sink_f_sptr;
+
+GR_QTGUI_API qtgui_time_sink_f_sptr qtgui_make_time_sink_f(int size, double bw,
+					      const std::string &name,
+					      int nconnectons=1,
+					      QWidget *parent=NULL);
+
+/*!
+ * \brief A graphical sink to display multiple signals in time.
+ * \ingroup qtgui_blk
+ *
+ * This is a QT-based graphical sink the takes set of a float streams
+ * and plots them in the time domain. Each signal is plotted with a
+ * different color, and the \a set_title and \a set_color functions
+ * can be used to change the lable and color for a given input number.
+ */
+class GR_QTGUI_API qtgui_time_sink_f : public gr_sync_block
+{
+private:
+  friend GR_QTGUI_API qtgui_time_sink_f_sptr qtgui_make_time_sink_f(int size, double bw,
+						       const std::string &name,
+						       int nconnections,
+						       QWidget *parent);
+  qtgui_time_sink_f(int size, double bw,
+		    const std::string &name,
+		    int nconnections,
+		    QWidget *parent=NULL);
+  
+  void initialize();
+
+  int d_size;
+  double d_bandwidth;
+  std::string d_name;
+  int d_nconnections;
+
+  int d_index;
+  std::vector<double*> d_residbufs;
+
+  double d_update_time;
+
+  QWidget *d_parent;
+  TimeDisplayForm *d_main_gui;
+
+  gruel::high_res_timer_type d_current_time;
+  gruel::high_res_timer_type d_last_time;
+
+public:
+  ~qtgui_time_sink_f();
+  void exec_();
+  QWidget*  qwidget();
+  PyObject* pyqwidget();
+
+  void set_time_domain_axis(double min, double max);
+  void set_update_time(double t);
+  void set_title(int which, const std::string &title);
+  void set_color(int which, const std::string &color);
+
+  QApplication *d_qApplication;
+
+  int work (int noutput_items,
+	    gr_vector_const_void_star &input_items,
+	    gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_QTGUI_TIME_SINK_F_H */