From e802e27f02789c28fd6241bcf97a4589519de08d Mon Sep 17 00:00:00 2001
From: Allan Bazinet <allan.bazinet@gmail.com>
Date: Thu, 24 Oct 2024 21:25:49 -0700
Subject: [PATCH] Use float precision for dial frequency

---
 mainwindow.cpp |  2 +-
 plotter.cpp    | 14 +++++++-------
 plotter.h      | 16 ++++++++--------
 widegraph.cpp  |  4 ++--
 widegraph.h    |  2 +-
 5 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/mainwindow.cpp b/mainwindow.cpp
index d619b2ba..d9428369 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -7961,7 +7961,7 @@ void MainWindow::handle_transceiver_update (Transceiver::TransceiverState const&
               aprsSetLocal();
             }
             statusChanged();
-            m_wideGraph->setDialFreq(m_freqNominal / 1.e6);
+            m_wideGraph->setDialFreq(m_freqNominal / 1.e6f);
           }
       } else {
         m_freqTxNominal = s.split () ? s.tx_frequency () : s.frequency ();
diff --git a/plotter.cpp b/plotter.cpp
index f39bacbe..87dbcce8 100644
--- a/plotter.cpp
+++ b/plotter.cpp
@@ -23,13 +23,13 @@ namespace
   // 30 meter band: 10.130-10.140 RTTY
   //                10.140-10.150 Packet
 
-  constexpr double BAND_30M_START = 10.13;
-  constexpr double BAND_30M_END   = 10.15;
+  constexpr float BAND_30M_START = 10.13f;
+  constexpr float BAND_30M_END   = 10.15f;
   
-  // The WSPR range is 200Hz in the 30m band, starting at 10.1401 MHz.
+  // The WSPR range starts at 10.1401 MHz and runs for 200 Hz.
 
-  constexpr double WSPR_RANGE = 200.0;
-  constexpr double WSPR_START = 10.1401;
+  constexpr float WSPR_START = 10.1401f;
+  constexpr int   WSPR_RANGE = 200;
 
   // FFT bin width, as with NSPS, a constant; see the JT9 documentation
   // for the reasoning behind the values used here, but in short, since
@@ -672,9 +672,9 @@ CPlotter::setFreq(int const freq)
 }
 
 void
-CPlotter::setDialFreq(double const d)
+CPlotter::setDialFreq(float const dialFreq)
 {
-  m_dialFreq = d;
+  m_dialFreq = dialFreq;
   drawOverlay();
   update();
 }
diff --git a/plotter.h b/plotter.h
index 7de09e94..1abff6f5 100644
--- a/plotter.h
+++ b/plotter.h
@@ -80,7 +80,7 @@ public:
   void setPlot2dGain(int n);
   void setBinsPerPixel(int n);
   void setPeriod(int n);
-  void setDialFreq(double d);
+  void setDialFreq(float);
   void setBand(QString const & band);
   void setFilterCenter(int center);
   void setFilterWidth(int width);
@@ -139,11 +139,8 @@ private:
   QSize   m_size;
   QString m_band;
 
-  bool m_filterEnabled  = false;
-  bool m_paintEventBusy = false;
-  bool m_scaleOK        = false;
-  bool m_replot         = false;
-  bool m_flatten        = false;
+  float m_fSpan    = 2000.0f;
+  float m_dialFreq = 0.0f;
 
   int m_nSubMode         =  0;
   int m_filterCenter     =  0;
@@ -168,8 +165,11 @@ private:
   int m_j                =  0;
   int m_TRperiod         =  15;
 
-  float   m_fSpan    = 2000.0f;
-  double  m_dialFreq = 0.0;
+  bool m_filterEnabled  = false;
+  bool m_paintEventBusy = false;
+  bool m_scaleOK        = false;
+  bool m_replot         = false;
+  bool m_flatten        = false;
 };
 
 #endif // PLOTTER_H
diff --git a/widegraph.cpp b/widegraph.cpp
index eb2196e8..52fdeae1 100644
--- a/widegraph.cpp
+++ b/widegraph.cpp
@@ -706,9 +706,9 @@ WideGraph::on_spec2dComboBox_currentIndexChanged(int const index)
 }
 
 void
-WideGraph::setDialFreq(double const d)
+WideGraph::setDialFreq(float const dialFreq)
 {
-  ui->widePlot->setDialFreq(d);
+  ui->widePlot->setDialFreq(dialFreq);
 }
 
 void
diff --git a/widegraph.h b/widegraph.h
index a9d59ce5..f0b89be5 100644
--- a/widegraph.h
+++ b/widegraph.h
@@ -93,7 +93,7 @@ signals:
   void drifted(int, int);
 
 public slots:
-  void setDialFreq(double);
+  void setDialFreq(float);
   void setTimeControlsVisible(bool);
   bool timeControlsVisible() const;
   void setControlsVisible(bool, bool = true);