Merged a few changes from QCustomPlot's GIT repo that haven't made it

to a release yet. Turned off OpenGL as it has troubles on some machines.

qcustomplot.cpp

@@ -9262,11 +9262,14 @@ void QCPAxisPainterPrivate::placeTickLabel(QCPPainter *painter, double position,
       {
         cachedLabel->pixmap = QPixmap(labelData.rotatedTotalBounds.size()*mParentPlot->bufferDevicePixelRatio());
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
+#  ifdef QCP_DEVICEPIXELRATIO_FLOAT
+        cachedLabel->pixmap.setDevicePixelRatio(mParentPlot->devicePixelRatioF());
+#  else
         cachedLabel->pixmap.setDevicePixelRatio(mParentPlot->devicePixelRatio());
+#  endif
 #endif
       } else
         cachedLabel->pixmap = QPixmap(labelData.rotatedTotalBounds.size());
-      cachedLabel->pixmap = QPixmap(labelData.rotatedTotalBounds.size());
       cachedLabel->pixmap.fill(Qt::transparent);
       QCPPainter cachePainter(&cachedLabel->pixmap);
       cachePainter.setPen(painter->pen());
@@ -12629,7 +12632,11 @@ QCustomPlot::QCustomPlot(QWidget *parent) :
   currentLocale.setNumberOptions(QLocale::OmitGroupSeparator);
   setLocale(currentLocale);
 #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED
+#  ifdef QCP_DEVICEPIXELRATIO_FLOAT
+  setBufferDevicePixelRatio(QWidget::devicePixelRatioF());
+#  else
   setBufferDevicePixelRatio(QWidget::devicePixelRatio());
+#  endif
 #endif
 
   mOpenGlAntialiasedElementsBackup = mAntialiasedElements;
@@ -17579,7 +17586,7 @@ void QCPAxisRect::mouseMoveEvent(QMouseEvent *event, const QPointF &startPos)
     {
       if (mParentPlot->noAntialiasingOnDrag())
         mParentPlot->setNotAntialiasedElements(QCP::aeAll);
-      mParentPlot->replot();
+      mParentPlot->replot(QCustomPlot::rpQueuedReplot);
     }
 
   }

qcustomplot.h

@@ -41,7 +41,11 @@
 #endif
 
 #if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
-  #define QCP_DEVICEPIXELRATIO_SUPPORTED
+#  define QCP_DEVICEPIXELRATIO_SUPPORTED
+#  if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
+#    define QCP_DEVICEPIXELRATIO_FLOAT
+#  endif
+
 #endif
 
 #include <QtCore/QObject>

re/graphingwindow.cpp

@@ -68,7 +68,8 @@ GraphingWindow::GraphingWindow(const QVector<CANFrame> *frames, QWidget *parent)
 
     ui->graphingView->setAttribute(Qt::WA_AcceptTouchEvents);
 
-    ui->graphingView->setOpenGl(true); //purdy and fast drawing courtesy of your video card - pretty everyone has 3D accel these days
+    //ui->graphingView->setOpenGl(true); //purdy and fast drawing courtesy of your video card - pretty everyone has 3D accel these days
+    ui->graphingView->setAntialiasedElements(QCP::aeNone);
 
     needScaleSetup = true;
     followGraphEnd = false;