From 450249dd4cdbc7b6dfe93fbeabc95b946e8f9549 Mon Sep 17 00:00:00 2001
From: Joe Taylor <joe@princeton.edu>
Date: Fri, 18 Dec 2020 16:19:01 -0500
Subject: [PATCH] Add a DT label to the Q65 red sync curve.

---
 lib/q65_sync.f90    |  4 ++--
 widgets/plotter.cpp | 11 +++++++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/q65_sync.f90 b/lib/q65_sync.f90
index ff2cebcb5..95fa5c9ff 100644
--- a/lib/q65_sync.f90
+++ b/lib/q65_sync.f90
@@ -241,8 +241,8 @@ subroutine q65_sync(nutc,iwave,nmax,mode_q65,codewords,ncw,nsps,nfqso,ntol, &
 
 200 do i=-ia,ia
      freq=nfqso + i*df
-     write(17,1100) freq,ccf1(i)
-1100 format(2f10.3)
+     write(17,1100) freq,ccf1(i),xdt
+1100 format(3f10.3)
   enddo
   close(17)
 
diff --git a/widgets/plotter.cpp b/widgets/plotter.cpp
index 737658de3..5dfacb3d2 100644
--- a/widgets/plotter.cpp
+++ b/widgets/plotter.cpp
@@ -273,20 +273,27 @@ void CPlotter::draw(float swide[], bool bScroll, bool bRed)
     f.open(m_redFile.toLatin1());
     if(f) {
       int x,y;
-      float freq,sync;
+      float freq,sync,xdt;
       for(int i=0; i<99999; i++) {
-        f >> freq >> sync;
+        f >> freq >> sync >> xdt;
         if(f.eof()) break;
         x=XfromFreq(freq);
         y=m_h2*(0.9 - 0.09*gain2d*sync) - m_plot2dZero;
         LineBuf2[k].setX(x);
         LineBuf2[k].setY(y);
+
         k++;
       }
       f.close();
       QPen pen0(Qt::red,2);
       painter2D.setPen(pen0);
       painter2D.drawPolyline(LineBuf2,k);
+      QString t;
+      t = t.asprintf("DT = %6.2f",xdt);
+      painter2D.setPen(Qt::white);
+      Font.setWeight(QFont::Bold);
+      painter2D.setFont(Font);
+      painter2D.drawText(m_w-100,m_h2/2,t);
     }
   }
   update();                                    //trigger a new paintEvent