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diff --git a/gr-qtgui/lib/DisplayPlot.h b/gr-qtgui/lib/DisplayPlot.h
new file mode 100644
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+++ b/gr-qtgui/lib/DisplayPlot.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2009,2010,2011,2012 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 DOMAIN_DISPLAY_PLOT_H
+#define DOMAIN_DISPLAY_PLOT_H
+
+#include <stdint.h>
+#include <cstdio>
+#include <vector>
+#include <qwt_plot.h>
+#include <qwt_painter.h>
+#include <qwt_plot_canvas.h>
+#include <qwt_plot_curve.h>
+#include <qwt_scale_engine.h>
+#include <qwt_scale_widget.h>
+#include <qwt_plot_zoomer.h>
+#include <qwt_plot_panner.h>
+#include <qwt_plot_magnifier.h>
+#include <qwt_plot_marker.h>
+#include <qwt_symbol.h>
+#include <qtgui/utils.h>
+
+#if QWT_VERSION >= 0x060000
+#include <qwt_compat.h>
+#endif
+
+class DisplayPlot:public QwtPlot{
+  Q_OBJECT
+
+public:
+  DisplayPlot(int nplots, QWidget*);
+  virtual ~DisplayPlot();
+
+  virtual void replot() = 0;
+
+  // Make sure to create your won PlotNewData method in the derived
+  // class:
+  // void PlotNewData(...);
+
+public slots:
+  void setYaxis(double min, double max);
+  void setXaxis(double min, double max);
+  void setLineLabel(int which, QString label);
+  void setLineColor(int which, QString color);
+  void setLineWidth(int which, int width);
+  void setLineStyle(int which, Qt::PenStyle style);
+  void setLineMarker(int which, QwtSymbol::Style marker);
+  void setMarkerAlpha(int which, int alpha);
+
+  void setStop(bool on);
+
+  QString lineLabel(int which);
+
+  void resizeSlot(QSize *s);
+
+  // Because of the preprocessing of slots in QT, these are not
+  // easily separated by the version check. Make one for each
+  // version until it's worked out.
+  void OnPickerPointSelected(const QwtDoublePoint & p);
+  void OnPickerPointSelected6(const QPointF & p);
+
+signals:
+  void plotPointSelected(const QPointF p);
+
+protected slots:
+  void LegendEntryChecked(QwtPlotItem *plotItem, bool on);
+
+protected:
+  int _nplots;
+  std::vector<QwtPlotCurve*> _plot_curve;
+
+  QwtPlotPanner* _panner;
+  QwtPlotZoomer* _zoomer;
+
+  QwtDblClickPlotPicker *_picker;
+  QwtPlotMagnifier *_magnifier;
+
+  int64_t _numPoints;
+
+  bool _stop;
+};
+
+#endif /* DOMAIN_DISPLAY_PLOT_H */