Removed issue with plasma buffer resizing with the waterfall.

wfmain.cpp

@@ -1079,7 +1079,7 @@ void wfmain::setUIToPrefs()
 
     ui->wfLengthSlider->setValue(prefs.wflength);
     prepareWf(prefs.wflength);
-
+    preparePlasma();
     ui->topLevelSlider->setValue(prefs.plotCeiling);
     ui->botLevelSlider->setValue(prefs.plotFloor);
 
@@ -2079,17 +2079,6 @@ void wfmain::prepareWf(unsigned int wfLength)
         QByteArray empty((int)spectWidth, '\x01');
         spectrumPeaks = QByteArray( (int)spectWidth, '\x01' );
 
-        if(spectrumPlasmaSize == 0)
-            spectrumPlasmaSize = 128;
-
-        //spectrumPlasma.resize(spectrumPlasmaSize);
-        for(unsigned int p=0; p < spectrumPlasmaSize; p++)
-        {
-            spectrumPlasma.append(empty);
-        }
-
-        //wfimage.resize(wfLengthMax);
-
         if((unsigned int)wfimage.size() < wfLengthMax)
         {
             unsigned int i=0;
@@ -3646,6 +3635,28 @@ void wfmain::receiveSpectrumData(QByteArray spectrum, double startFreq, double e
     }
 }
 
+void wfmain::preparePlasma()
+{
+    if(plasmaPrepared)
+        return;
+    QByteArray empty((int)spectWidth, '\x01');
+
+    if(spectrumPlasmaSize == 0)
+        spectrumPlasmaSize = 128;
+
+    plasmaMutex.lock();
+    spectrumPlasma.clear();
+
+    for(unsigned int p=0; p < spectrumPlasmaSize; p++)
+    {
+        spectrumPlasma.append(empty);
+    }
+
+    spectrumPlasma.squeeze();
+    plasmaMutex.unlock();
+    plasmaPrepared = true;
+}
+
 void wfmain::computePlasma()
 {
     plasmaMutex.lock();

wfmain.h

@@ -573,6 +573,8 @@ private:
     void setPlotTheme(QCustomPlot *plot, bool isDark);
     void prepareWf();
     void prepareWf(unsigned int wfLength);
+    void preparePlasma();
+    bool plasmaPrepared = false;
     void computePlasma();
     void showHideSpectrum(bool show);
     void getInitialRigState();