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-rw-r--r--gr-qtgui/include/gnuradio/qtgui/waterfall_sink_f.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/gr-qtgui/include/gnuradio/qtgui/waterfall_sink_f.h b/gr-qtgui/include/gnuradio/qtgui/waterfall_sink_f.h
index bbfcc33164..4570ef9d54 100644
--- a/gr-qtgui/include/gnuradio/qtgui/waterfall_sink_f.h
+++ b/gr-qtgui/include/gnuradio/qtgui/waterfall_sink_f.h
@@ -124,6 +124,13 @@ namespace gr {
virtual void set_line_alpha(int which, double alpha) = 0;
virtual void set_color_map(int which, const int color) = 0;
+ /*!
+ * Pass "true" to this function to only show the positive half
+ * of the spectrum. By default, this plotter shows the full
+ * spectrum (positive and negative halves).
+ */
+ virtual void set_plot_pos_half(bool half) = 0;
+
virtual std::string title() = 0;
virtual std::string line_label(int which) = 0;
virtual double line_alpha(int which) = 0;