Fixed issue with tuning steps and scrolling. Note: there are two

modifiers for the scrolling steps.

By default, scrolling on the WF or plot produces 100 Hz steps. Hold down
shift for 10 Hz steps, or hold down control for 1 khz steps. This works
well for me tuning in stations I have clicked on but perhaps not clicked
accurately.

wfmain.cpp

@@ -440,6 +440,9 @@ wfmain::wfmain(const QString serialPortCL, const QString hostCL, QWidget *parent
     pttTimer->setSingleShot(true);
     connect(pttTimer, SIGNAL(timeout()), this, SLOT(handlePttLimit()));
     amTransmitting = false;
+    ui->tuneLockChk->setChecked(false);
+    freqLock = false;
+
 
     // Not needed since we automate this now.
     /*
@@ -1191,6 +1194,7 @@ void wfmain::setTuningSteps()
     tsPlusShift =   0.0001f;
     tsPage =        1.0f;
     tsPageShift =   0.5f; // TODO, unbind this keystroke from the dial
+    tsWfScroll =    0.0001f;
 }
 
 double wfmain::roundFrequency(double frequency)
@@ -2053,36 +2057,54 @@ void wfmain::handleWFScroll(QWheelEvent *we)
     // We will click the dial once for every 120 received.
     //QPoint delta = we->angleDelta();
 
-    // TODO: Use other method, knob has too few positions to be useful for large steps.
+    if(freqLock)
+        return;
+
+    int clicks = we->angleDelta().y() / 120;
+
+    float steps = tsWfScroll * clicks;
 
-    int steps = we->angleDelta().y() / 120;
     Qt::KeyboardModifiers key=  we->modifiers();
 
     if (key == Qt::ShiftModifier)
     {
-        steps *=20;
+        steps /= 10;
     } else if (key == Qt::ControlModifier)
     {
         steps *=10;
     }
 
-    ui->freqDial->setValue( ui->freqDial->value() + (steps)*ui->freqDial->singleStep() );
+    freqMhz = roundFrequency(freqMhz - steps);
+    knobFreqMhz = freqMhz;
+    emit setFrequency(freqMhz);
+    ui->freqLabel->setText(QString("%1").arg(freqMhz, 0, 'f'));
+    issueDelayedCommand(cmdGetFreq);
 }
 
 void wfmain::handlePlotScroll(QWheelEvent *we)
 {
-    int steps = we->angleDelta().y() / 120;
+    if(freqLock)
+        return;
+
+    int clicks = we->angleDelta().y() / 120;
+
+    float steps = tsWfScroll * clicks;
+
     Qt::KeyboardModifiers key=  we->modifiers();
 
     if (key == Qt::ShiftModifier)
     {
-        // TODO: Zoom
+        steps /= 10;
     } else if (key == Qt::ControlModifier)
     {
         steps *=10;
     }
 
-    ui->freqDial->setValue( ui->freqDial->value() + (steps)*ui->freqDial->singleStep() );
+    freqMhz = roundFrequency(freqMhz - steps);
+    knobFreqMhz = freqMhz;
+    emit setFrequency(freqMhz);
+    ui->freqLabel->setText(QString("%1").arg(freqMhz, 0, 'f'));
+    issueDelayedCommand(cmdGetFreq);
 }
 
 void wfmain::on_scopeEnableWFBtn_clicked(bool checked)

wfmain.h

@@ -603,6 +603,7 @@ private:
     float tsPlusControl;
     float tsPage;
     float tsPageShift;
+    float tsWfScroll;