diff --git a/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.cpp b/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.cpp
index d8a75f10df..a8175101c6 100644
--- a/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.cpp
+++ b/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.cpp
@@ -33,13 +33,12 @@
 
 JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase(JKQTBasePlotter* parent):
     JKQTPEvaluatedFunctionWithErrorsGraphBase(parent),
-    drawLine(true),
-    fillCurve(false),
     drawErrorPolygons(false),
     drawErrorLines(false)
 {
     initLineStyle(parent, parentPlotStyle);
     initFillStyle(parent, parentPlotStyle);
+    setFillCurve(false);
 
     errorColor=getLineColor().lighter();
     errorFillColor=getLineColor().lighter();
@@ -71,16 +70,6 @@ JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::~JKQTPEvaluatedFunctionWithErr
 }
 
 
-void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::setDrawLine(bool __value)
-{
-    this->drawLine = __value;
-}
-
-bool JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::getDrawLine() const
-{
-    return this->drawLine;
-}
-
 void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawKeyMarker(JKQTPEnhancedPainter& painter, QRectF& rect) {
     painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
     QPen p=getLinePen(painter, parent);
@@ -90,10 +79,10 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawKeyMarker(JKQTPEnhanc
     QBrush b=getFillBrush(painter, parent);
     const double y=rect.top()+rect.height()/2.0;
     painter.setPen(np);
-    if (drawLine) painter.setPen(p);
+    if (getDrawLine()) painter.setPen(p);
     painter.setBrush(b);
-    if (fillCurve) painter.drawRect(rect);
-    if (!fillCurve && drawLine) painter.drawLine(QLineF(rect.left(), y, rect.right(), y));
+    if (getFillCurve()) painter.drawRect(rect);
+    if (!getFillCurve() && getDrawLine()) painter.drawLine(QLineF(rect.left(), y, rect.right(), y));
 
 }
 
@@ -262,7 +251,7 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawXGraph(JKQTPEnhancedP
 
                 y=qBound(yami, y, yama);
 
-                if (fillCurve) {
+                if (getFillCurve()) {
                     if (!first) filledPolygon<<QPointF(x, y0);
                     filledPolygon<<QPointF(x, y);
                     if (it+1==data.end()) filledPolygon<<QPointF(x, y0);
@@ -273,7 +262,7 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawXGraph(JKQTPEnhancedP
                     epBottom<<QPointF(x, yme);
                 }
 
-                if (drawLine) {
+                if (getDrawLine()) {
                     linePolygon<<QPointF(x, y);
                 }
 
@@ -299,13 +288,13 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawXGraph(JKQTPEnhancedP
             painter.drawPolygon(poly, Qt::OddEvenFill);
 
         }
-        if (fillCurve) {
+        if (getFillCurve()) {
             painter.save(); auto __finalpaintfillc=JKQTPFinally([&painter]() {painter.restore();});
             painter.setBrush(b);
             painter.setPen(np);
             painter.drawPolygon(filledPolygon, Qt::OddEvenFill);
         }
-        if (drawLine) {
+        if (getDrawLine()) {
             painter.save(); auto __finalpaintline=JKQTPFinally([&painter]() {painter.restore();});
             painter.setPen(p);
             painter.drawPolyline(linePolygon);
@@ -389,7 +378,7 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawYGraph(JKQTPEnhancedP
 
                 x=qBound(xami, x, xama);
 
-                if (fillCurve) {
+                if (getFillCurve()) {
                     if (!first) filledPolygon<<QPointF(x0, y);
                     filledPolygon<<QPointF(x, y);
                     if (it+1==data.end()) filledPolygon<<QPointF(x0, y);
@@ -400,7 +389,7 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawYGraph(JKQTPEnhancedP
                     epBottom<<QPointF(xme, y);
                 }
 
-                if (drawLine) {
+                if (getDrawLine()) {
                     linePolygon<<QPointF(x, y);
                 }
 
@@ -425,13 +414,13 @@ void JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase::drawYGraph(JKQTPEnhancedP
             }
             painter.drawPolygon(poly, Qt::OddEvenFill);
         }
-        if (fillCurve) {
+        if (getFillCurve()) {
             painter.save(); auto __finalpaintfillc=JKQTPFinally([&painter]() {painter.restore();});
             painter.setBrush(b);
             painter.setPen(np);
             painter.drawPolygon(filledPolygon, Qt::OddEvenFill);
         }
-        if (drawLine) {
+        if (getDrawLine()) {
             painter.save(); auto __finalpaintline=JKQTPFinally([&painter]() {painter.restore();});
             painter.setPen(p);
             painter.drawPolyline(linePolygon);
diff --git a/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h b/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h
index 970a04f544..eb1c29b507 100644
--- a/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h
+++ b/lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h
@@ -44,7 +44,7 @@
  *
  *  \see e.g. JKQTPXFunctionLineGraph for a concrete implementation
  */
-class JKQTPLOTTER_LIB_EXPORT JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase: public JKQTPEvaluatedFunctionWithErrorsGraphBase, public JKQTPGraphLineStyleMixin, public JKQTPGraphFillStyleMixin {
+class JKQTPLOTTER_LIB_EXPORT JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase: public JKQTPEvaluatedFunctionWithErrorsGraphBase, public JKQTPGraphLineAndFillStyleMixin {
         Q_OBJECT
     public:
 
@@ -62,8 +62,6 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase: p
         /** \brief returns the color to be used for the key label */
         virtual QColor getKeyLabelColor() const override;
 
-        /*! \copydoc drawLine */
-        bool getDrawLine() const;
 
 
         /*! \copydoc drawErrorPolygons */
@@ -89,8 +87,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase: p
         /*! \brief set color, fill color and error color at the same time */
         void setColor(QColor c);
 
-        /*! \copydoc drawLine */
-        void setDrawLine(bool __value);
+
         /*! \copydoc drawErrorPolygons */
         void setDrawErrorPolygons(bool __value);
         /*! \copydoc drawErrorLines */
@@ -115,12 +112,6 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase: p
 
 
 
-        /** \brief indicates whether to draw a line or not */
-        bool drawLine;
-        /** \brief indicates whether to fill the space between the curve and the x-axis */
-        bool fillCurve;
-
-
         /** \brief indicates whether an error polygon should be drawn */
         bool drawErrorPolygons;
         /** \brief indicates whether error lines should be drawn */
diff --git a/lib/jkqtplotter/graphs/jkqtpfilledcurve.cpp b/lib/jkqtplotter/graphs/jkqtpfilledcurve.cpp
index 27610b2cdf..f24f449cbb 100644
--- a/lib/jkqtplotter/graphs/jkqtpfilledcurve.cpp
+++ b/lib/jkqtplotter/graphs/jkqtpfilledcurve.cpp
@@ -187,9 +187,12 @@ void JKQTPFilledVerticalRangeGraph::draw(JKQTPEnhancedPainter &painter)
                     poly_all.append(plow[i]);
                 }
             }
-            painter.setBrush(b);
-            painter.setPen(np);
-            painter.drawPolygon(poly_all);
+
+            if (getFillCurve()) {
+                painter.setBrush(b);
+                painter.setPen(np);
+                painter.drawPolygon(poly_all);
+            }
 
 
             if (getDrawLine()) {
@@ -299,9 +302,12 @@ void JKQTPFilledHorizontalRangeGraph::draw(JKQTPEnhancedPainter &painter)
                     poly_all.append(plow[i]);
                 }
             }
-            painter.setBrush(b);
-            painter.setPen(np);
-            painter.drawPolygon(poly_all);
+
+            if (getFillCurve()) {
+                painter.setBrush(b);
+                painter.setPen(np);
+                painter.drawPolygon(poly_all);
+            }
 
 
             if (getDrawLine()) {
diff --git a/lib/jkqtplotter/graphs/jkqtpspecialline.cpp b/lib/jkqtplotter/graphs/jkqtpspecialline.cpp
index 2c9402a5e5..e1c9170dca 100644
--- a/lib/jkqtplotter/graphs/jkqtpspecialline.cpp
+++ b/lib/jkqtplotter/graphs/jkqtpspecialline.cpp
@@ -39,8 +39,6 @@
 JKQTPSpecialLineHorizontalGraph::JKQTPSpecialLineHorizontalGraph(JKQTBasePlotter* parent):
     JKQTPXYGraph(parent)
 {
-    m_drawLine=true;
-    m_fillCurve=false;
     m_drawSymbols=false;
     m_specialLineType=JKQTPStepLeft;
     m_baseline=0;
@@ -49,6 +47,7 @@ JKQTPSpecialLineHorizontalGraph::JKQTPSpecialLineHorizontalGraph(JKQTBasePlotter
     initLineStyle(parent, parentPlotStyle);
     initFillStyle(parent, parentPlotStyle);
     initSymbolStyle(parent, parentPlotStyle);
+    setFillCurve(false);
 }
 
 
@@ -65,10 +64,10 @@ void JKQTPSpecialLineHorizontalGraph::drawKeyMarker(JKQTPEnhancedPainter& painte
     QBrush b=getFillBrush(painter, parent);
     const double y=rect.top()+rect.height()/2.0;
     painter.setPen(np);
-    if (m_drawLine) painter.setPen(p);
+    if (getDrawLine()) painter.setPen(p);
     painter.setBrush(b);
-    if (m_fillCurve) painter.drawRect(rect);
-    if (!m_fillCurve && m_drawLine) painter.drawLine(QLineF(rect.left(), y, rect.right(), y));
+    if (getFillCurve()) painter.drawRect(rect);
+    if (!getFillCurve() && getDrawLine()) painter.drawLine(QLineF(rect.left(), y, rect.right(), y));
     if (m_drawSymbols) {
         plotStyledSymbol(parent, painter, rect.center().x(), rect.center().y(), rect.width()*0.5);
     }
@@ -79,16 +78,6 @@ QColor JKQTPSpecialLineHorizontalGraph::getKeyLabelColor() const {
     return getLineColor();
 }
 
-void JKQTPSpecialLineHorizontalGraph::setDrawLine(bool __value)
-{
-    this->m_drawLine = __value;
-}
-
-bool JKQTPSpecialLineHorizontalGraph::getDrawLine() const
-{
-    return this->m_drawLine;
-}
-
 void JKQTPSpecialLineHorizontalGraph::setDrawSymbols(bool __value)
 {
     m_drawSymbols=__value;
@@ -99,15 +88,6 @@ bool JKQTPSpecialLineHorizontalGraph::getDrawSymbols() const
     return m_drawSymbols;
 }
 
-void JKQTPSpecialLineHorizontalGraph::setFillCurve(bool __value)
-{
-    this->m_fillCurve = __value;
-}
-
-bool JKQTPSpecialLineHorizontalGraph::getFillCurve() const
-{
-    return this->m_fillCurve;
-}
 
 void JKQTPSpecialLineHorizontalGraph::setSpecialLineType(const JKQTPSpecialLineType &__value)
 {
@@ -155,164 +135,159 @@ void JKQTPSpecialLineHorizontalGraph::draw(JKQTPEnhancedPainter& painter) {
     QPen np(Qt::NoPen);
     QBrush b=getFillBrush(painter, parent);
 
-    int imax=static_cast<int>(qMin(datastore->getRows(static_cast<size_t>(xColumn)), datastore->getRows(static_cast<size_t>(yColumn))));
+    int imax=0;
     int imin=0;
 
-    if (imax<imin) {
-        int h=imin;
-        imin=imax;
-        imax=h;
-    }
-    if (imin<0) imin=0;
-    if (imax<0) imax=0;
+    if (getIndexRange(imin, imax)) {
 
-    QPainterPath pl, pf;
-    QVector<QPointF> ps;
 
-    double xold=-1;
-    double yold=-1;
-//    double xstart=-1;
-//    double ystart=-1;
-    //double x0=transformX(0);
-    //if (parent->getXAxis()->isLogAxis()) x0=transformX(parent->getXAxis()->getMin());
-    double y0=transformY(m_baseline);
-    if (parent->getYAxis()->isLogAxis()) {
-        y0=transformY(parent->getYAxis()->getMin());
-        if (m_baseline>0 && m_baseline>parent->getYAxis()->getMin()) y0=transformY(m_baseline);
-        else y0=transformY(parent->getYAxis()->getMin());
-    }
-    bool subsequentItem=false;
-    intSortData();
-    for (int iii=imin; iii<imax; iii++) {
-        int i=qBound(imin, getDataIndex(iii), imax);
-        double xv=datastore->get(static_cast<size_t>(xColumn),static_cast<size_t>(i));
-        double yv=datastore->get(static_cast<size_t>(yColumn),static_cast<size_t>(i));
-        //std::cout<<"(xv, yv) =    ( "<<xv<<", "<<yv<<" )\n";
-        if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)) {
-            double x=transformX(xv);
-            double y=transformY(yv);
-            if (JKQTPIsOKFloat(x) && JKQTPIsOKFloat(y)) {
-                ps.append(QPointF(x,y));
-                if (subsequentItem) {
-                    //double xl1=xold;
-                    //double yl1=yold;
-                    //double xl2=x;
-                    //double yl2=y;
+        QPainterPath pl, pf;
+        QVector<QPointF> ps;
 
-                    if (m_specialLineType==JKQTPStepCenter) {
-                        //                      x/y
-                        //              |--------*
-                        //              |
-                        //     *--------|
-                        // xold/yold
-                        const double d=(x-xold);
-                        pf.lineTo(xold+d/2.0, yold);
-                        pf.lineTo(xold+d/2.0, y);
+        double xold=-1;
+        double yold=-1;
+    //    double xstart=-1;
+    //    double ystart=-1;
+        //double x0=transformX(0);
+        //if (parent->getXAxis()->isLogAxis()) x0=transformX(parent->getXAxis()->getMin());
+        double y0=transformY(m_baseline);
+        if (parent->getYAxis()->isLogAxis()) {
+            y0=transformY(parent->getYAxis()->getMin());
+            if (m_baseline>0 && m_baseline>parent->getYAxis()->getMin()) y0=transformY(m_baseline);
+            else y0=transformY(parent->getYAxis()->getMin());
+        }
+        bool subsequentItem=false;
+        intSortData();
+        for (int iii=imin; iii<imax; iii++) {
+            const int i=qBound(imin, getDataIndex(iii), imax);
+            const double xv=datastore->get(static_cast<size_t>(xColumn),static_cast<size_t>(i));
+            const double yv=datastore->get(static_cast<size_t>(yColumn),static_cast<size_t>(i));
+            //std::cout<<"(xv, yv) =    ( "<<xv<<", "<<yv<<" )\n";
+            if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)) {
+                const double x=transformX(xv);
+                const double y=transformY(yv);
+                if (JKQTPIsOKFloat(x) && JKQTPIsOKFloat(y)) {
+                    ps.append(QPointF(x,y));
+                    if (subsequentItem) {
+                        //double xl1=xold;
+                        //double yl1=yold;
+                        //double xl2=x;
+                        //double yl2=y;
+
+                        if (m_specialLineType==JKQTPStepCenter) {
+                            //                      x/y
+                            //              |--------*
+                            //              |
+                            //     *--------|
+                            // xold/yold
+                            const double d=(x-xold);
+                            pf.lineTo(xold+d/2.0, yold);
+                            pf.lineTo(xold+d/2.0, y);
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(xold+d/2.0, yold);
+                                pl.lineTo(xold+d/2.0, y);
+                                pl.lineTo(x, y);
+                            }
+                        } else if (m_specialLineType==JKQTPStepLeft) {
+                            //                     x/y
+                            //     |----------------*
+                            //     |
+                            //     *
+                            // xold/yold
+                            pf.lineTo(xold, y);
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(xold, y);
+                                pl.lineTo(x, y);
+                            }
+                        } else if (m_specialLineType==JKQTPStepRight) {
+                            //                     x/y
+                            //                      *
+                            //                      |
+                            //     *----------------|
+                            // xold/yold
+                            pf.lineTo(x, yold);
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(x, yold);
+                                pl.lineTo(x, y);
+                            }
+                        } else if (m_specialLineType==JKQTPStepAverage) {
+                            //                     x/y
+                            //                      *
+                            //                      |
+                            //     |----------------|
+                            //     |
+                            //     *
+                            // xold/yold
+                            //const double d=(x-xold);
+                            const double h=(y-yold);
+                            pf.lineTo(xold, yold+h/2.0);
+                            pf.lineTo(x, yold+h/2.0);
+                            pf.lineTo(x,y);
+                            if (getDrawLine()) {
+                                pl.lineTo(xold, yold+h/2.0);
+                                pl.lineTo(x, yold+h/2.0);
+                                pl.lineTo(x,y);
+                            }
+                        } else if (m_specialLineType==JKQTPDirectLine) {
+                            //                     x/y
+                            //                 /----*
+                            //           /----/
+                            //     *----/
+                            // xold/yold
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(x, y);
+                            }
+                        }
+
+                        //std::cout<<"line ("<<xl1<<", "<<yl1<<") -- ("<<xl2<<", "<<yl2<<")"<<std::endl;
+                    } else {
+                        if (getDrawLine()) pl.moveTo(x,y);
+                        pf.moveTo(x, y0);
                         pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(xold+d/2.0, yold);
-                            pl.lineTo(xold+d/2.0, y);
-                            pl.lineTo(x, y);
-                        }
-                    } else if (m_specialLineType==JKQTPStepLeft) {
-                        //                     x/y
-                        //     |----------------*
-                        //     |
-                        //     *
-                        // xold/yold
-                        pf.lineTo(xold, y);
-                        pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(xold, y);
-                            pl.lineTo(x, y);
-                        }
-                    } else if (m_specialLineType==JKQTPStepRight) {
-                        //                     x/y
-                        //                      *
-                        //                      |
-                        //     *----------------|
-                        // xold/yold
-                        pf.lineTo(x, yold);
-                        pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(x, yold);
-                            pl.lineTo(x, y);
-                        }
-                    } else if (m_specialLineType==JKQTPStepAverage) {
-                        //                     x/y
-                        //                      *
-                        //                      |
-                        //     |----------------|
-                        //     |
-                        //     *
-                        // xold/yold
-                        //const double d=(x-xold);
-                        const double h=(y-yold);
-                        pf.lineTo(xold, yold+h/2.0);
-                        pf.lineTo(x, yold+h/2.0);
-                        pf.lineTo(x,y);
-                        if (m_drawLine) {
-                            pl.lineTo(xold, yold+h/2.0);
-                            pl.lineTo(x, yold+h/2.0);
-                            pl.lineTo(x,y);
-                        }
-                    } else if (m_specialLineType==JKQTPDirectLine) {
-                        //                     x/y
-                        //                 /----*
-                        //           /----/
-                        //     *----/
-                        // xold/yold
-                        pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(x, y);
-                        }
+                        //xstart=x;
+                        //ystart=y0;
                     }
-
-                    //std::cout<<"line ("<<xl1<<", "<<yl1<<") -- ("<<xl2<<", "<<yl2<<")"<<std::endl;
-                } else {
-                    if (m_drawLine) pl.moveTo(x,y);
-                    pf.moveTo(x, y0);
-                    pf.lineTo(x, y);
-                    //xstart=x;
-                    //ystart=y0;
+                    xold=x;
+                    yold=y;
+                    subsequentItem=true;
                 }
-                xold=x;
-                yold=y;
-                subsequentItem=true;
+            }
+        }
+        if (getFillCurve()) {
+            pf.lineTo(xold, y0);
+            pf.closeSubpath();
+        }
+        painter.save();
+        auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+
+        if (getFillCurve()) {
+            painter.fillPath(pf, b);
+        }
+
+        if (isHighlighted()) {
+            painter.setBrush(QBrush(Qt::transparent));
+            painter.setPen(ph);
+            painter.drawPath(pl);
+        }
+
+        if (getDrawLine()) {
+            painter.setBrush(QBrush(Qt::transparent));
+            painter.setPen(p);
+            painter.drawPath(pl);
+        }
+
+        if (m_drawSymbols) {
+            painter.save();
+            auto __finalpaintsym=JKQTPFinally([&painter]() {painter.restore();});
+            for (auto& ppoint: ps) {
+                plotStyledSymbol(parent, painter, ppoint.x(), ppoint.y());
             }
         }
     }
-    if (m_fillCurve) {
-        pf.lineTo(xold, y0);
-        pf.closeSubpath();
-    }
-    painter.save();
-    auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
-
-    if (m_fillCurve) {
-        painter.fillPath(pf, b);
-    }
-
-    if (isHighlighted()) {
-        painter.setBrush(QBrush(Qt::transparent));
-        painter.setPen(ph);
-        painter.drawPath(pl);
-    }
-
-    if (m_drawLine) {
-        painter.setBrush(QBrush(Qt::transparent));
-        painter.setPen(p);
-        painter.drawPath(pl);
-    }
-
-    if (m_drawSymbols) {
-        painter.save();
-        auto __finalpaintsym=JKQTPFinally([&painter]() {painter.restore();});
-        for (auto& ppoint: ps) {
-            plotStyledSymbol(parent, painter, ppoint.x(), ppoint.y());
-        }
-    }
-
 
     drawErrorsAfter(painter);
 }
@@ -353,136 +328,132 @@ void JKQTPSpecialLineVerticalGraph::draw(JKQTPEnhancedPainter& painter) {
     QPen np(Qt::NoPen);
     QBrush b=getFillBrush(painter, parent);
 
-    int imax=static_cast<int>(qMin(datastore->getRows(static_cast<size_t>(xColumn)), datastore->getRows(static_cast<size_t>(yColumn))));
+    int imax=0;
     int imin=0;
 
-    if (imax<imin) {
-        int h=imin;
-        imin=imax;
-        imax=h;
-    }
-    if (imin<0) imin=0;
-    if (imax<0) imax=0;
+    if (getIndexRange(imin, imax)) {
 
-    QPainterPath pl, pf;
-    QVector<QPointF> ps;
 
-    double xold=-1;
-    double yold=-1;
-    double x0=transformX(m_baseline);
-    if (parent->getXAxis()->isLogAxis()) {
-        if (m_baseline>0 && m_baseline>parent->getXAxis()->getMin()) x0=transformX(m_baseline);
-        else x0=transformX(parent->getXAxis()->getMin());
-    }
-    bool first=false;
-    intSortData();
-    for (int iii=imin; iii<imax; iii++) {
-        int i=qBound(imin, getDataIndex(iii), imax);
-        double xv=datastore->get(static_cast<size_t>(xColumn),static_cast<size_t>(i));
-        double yv=datastore->get(static_cast<size_t>(yColumn),static_cast<size_t>(i));
-        //std::cout<<"(xv, yv) =    ( "<<xv<<", "<<yv<<" )\n";
-        if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)) {
-            double x=transformX(xv);
-            double y=transformY(yv);
-            if (JKQTPIsOKFloat(x) && JKQTPIsOKFloat(y)) {
-                ps.append(QPointF(x,y));
-                if (first) {
-                    //double xl1=xold;
-                    //double yl1=yold;
-                    //double xl2=x;
-                    //double yl2=y;
+        QPainterPath pl, pf;
+        QVector<QPointF> ps;
 
-                    if (m_specialLineType==JKQTPStepCenter) {
-                        double d=(y-yold);
-                        pf.lineTo(xold, yold+d/2.0);
-                        pf.lineTo(x, yold+d/2.0);
+        double xold=-1;
+        double yold=-1;
+        double x0=transformX(m_baseline);
+        if (parent->getXAxis()->isLogAxis()) {
+            if (m_baseline>0 && m_baseline>parent->getXAxis()->getMin()) x0=transformX(m_baseline);
+            else x0=transformX(parent->getXAxis()->getMin());
+        }
+        bool first=false;
+        intSortData();
+        for (int iii=imin; iii<imax; iii++) {
+            const int i=qBound(imin, getDataIndex(iii), imax);
+            const double xv=datastore->get(static_cast<size_t>(xColumn),static_cast<size_t>(i));
+            const double yv=datastore->get(static_cast<size_t>(yColumn),static_cast<size_t>(i));
+            //std::cout<<"(xv, yv) =    ( "<<xv<<", "<<yv<<" )\n";
+            if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)) {
+                const double x=transformX(xv);
+                const double y=transformY(yv);
+                if (JKQTPIsOKFloat(x) && JKQTPIsOKFloat(y)) {
+                    ps.append(QPointF(x,y));
+                    if (first) {
+                        //double xl1=xold;
+                        //double yl1=yold;
+                        //double xl2=x;
+                        //double yl2=y;
+
+                        if (m_specialLineType==JKQTPStepCenter) {
+                            double d=(y-yold);
+                            pf.lineTo(xold, yold+d/2.0);
+                            pf.lineTo(x, yold+d/2.0);
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(xold, yold+d/2.0);
+                                pl.lineTo(x, yold+d/2.0);
+                                pl.lineTo(x, y);
+                            }
+                        } else if (m_specialLineType==JKQTPStepLeft) {
+                            pf.lineTo(x, yold);
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(x, yold);
+                                pl.lineTo(x, y);
+                            }
+                        } else if (m_specialLineType==JKQTPStepRight) {
+                            pf.lineTo(xold, y);
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(xold, y);
+                                pl.lineTo(x, y);
+                            }
+                        } else if (m_specialLineType==JKQTPStepAverage) {
+                            //                     x/y
+                            //              |-------*
+                            //              |
+                            //              |
+                            //              |
+                            //     *--------|
+                            // xold/yold
+                            const double d=(x-xold);
+                            //const double h=(y-yold);
+                            pf.lineTo(xold+d/2.0, yold);
+                            pf.lineTo(xold+d/2.0, y);
+                            pf.lineTo(x,y);
+                            if (getDrawLine()) {
+                                pl.lineTo(xold+d/2.0, yold);
+                                pl.lineTo(xold+d/2.0, y);
+                                pl.lineTo(x,y);
+                            }
+                        } else if (m_specialLineType==JKQTPDirectLine) {
+                            //                     x/y
+                            //                 /----*
+                            //           /----/
+                            //     *----/
+                            // xold/yold
+                            pf.lineTo(x, y);
+                            if (getDrawLine()) {
+                                pl.lineTo(x, y);
+                            }
+                        }
+
+                        //std::cout<<"line ("<<xl1<<", "<<yl1<<") -- ("<<xl2<<", "<<yl2<<")"<<std::endl;
+                    } else {
+                        if (getDrawLine()) pl.moveTo(x,y);
+                        pf.moveTo(x0, y);
                         pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(xold, yold+d/2.0);
-                            pl.lineTo(x, yold+d/2.0);
-                            pl.lineTo(x, y);
-                        }
-                    } else if (m_specialLineType==JKQTPStepLeft) {
-                        pf.lineTo(x, yold);
-                        pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(x, yold);
-                            pl.lineTo(x, y);
-                        }
-                    } else if (m_specialLineType==JKQTPStepRight) {
-                        pf.lineTo(xold, y);
-                        pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(xold, y);
-                            pl.lineTo(x, y);
-                        }
-                    } else if (m_specialLineType==JKQTPStepAverage) {
-                        //                     x/y
-                        //              |-------*
-                        //              |
-                        //              |
-                        //              |
-                        //     *--------|
-                        // xold/yold
-                        const double d=(x-xold);
-                        //const double h=(y-yold);
-                        pf.lineTo(xold+d/2.0, yold);
-                        pf.lineTo(xold+d/2.0, y);
-                        pf.lineTo(x,y);
-                        if (m_drawLine) {
-                            pl.lineTo(xold+d/2.0, yold);
-                            pl.lineTo(xold+d/2.0, y);
-                            pl.lineTo(x,y);
-                        }
-                    } else if (m_specialLineType==JKQTPDirectLine) {
-                        //                     x/y
-                        //                 /----*
-                        //           /----/
-                        //     *----/
-                        // xold/yold
-                        pf.lineTo(x, y);
-                        if (m_drawLine) {
-                            pl.lineTo(x, y);
-                        }
                     }
-
-                    //std::cout<<"line ("<<xl1<<", "<<yl1<<") -- ("<<xl2<<", "<<yl2<<")"<<std::endl;
-                } else {
-                    if (m_drawLine) pl.moveTo(x,y);
-                    pf.moveTo(x0, y);
-                    pf.lineTo(x, y);
+                    xold=x;
+                    yold=y;
+                    first=true;
                 }
-                xold=x;
-                yold=y;
-                first=true;
             }
         }
-    }
-    pf.lineTo(x0, yold);
-    pf.closeSubpath();
-    painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+        pf.lineTo(x0, yold);
+        pf.closeSubpath();
+        painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
 
-    if (m_fillCurve) {
-        painter.fillPath(pf, b);
-    }
+        if (getFillCurve()) {
+            painter.fillPath(pf, b);
+        }
 
-    if (isHighlighted()) {
-        painter.setBrush(QBrush(Qt::transparent));
-        painter.setPen(ph);
-        painter.drawPath(pl);
-    }
+        if (isHighlighted()) {
+            painter.setBrush(QBrush(Qt::transparent));
+            painter.setPen(ph);
+            painter.drawPath(pl);
+        }
 
-    if (m_drawLine) {
-        painter.setBrush(QBrush(Qt::transparent));
-        painter.setPen(p);
-        painter.drawPath(pl);
-    }
+        if (getDrawLine()) {
+            painter.setBrush(QBrush(Qt::transparent));
+            painter.setPen(p);
+            painter.drawPath(pl);
+        }
 
-    if (m_drawSymbols) {
-        painter.save();
-        auto __finalpaintsym=JKQTPFinally([&painter]() {painter.restore();});
-        for (auto& point: ps) {
-            plotStyledSymbol(parent, painter, point.x(), point.y());
+        if (m_drawSymbols) {
+            painter.save();
+            auto __finalpaintsym=JKQTPFinally([&painter]() {painter.restore();});
+            for (auto& point: ps) {
+                plotStyledSymbol(parent, painter, point.x(), point.y());
+            }
         }
     }
 
diff --git a/lib/jkqtplotter/graphs/jkqtpspecialline.h b/lib/jkqtplotter/graphs/jkqtpspecialline.h
index 3a1f8a280f..79d835de88 100644
--- a/lib/jkqtplotter/graphs/jkqtpspecialline.h
+++ b/lib/jkqtplotter/graphs/jkqtpspecialline.h
@@ -50,7 +50,7 @@ class JKQTPDatastore;
 
     \see JKQTPSpecialLineVerticalGraph, JKQTPFilledCurveXGraph, \ref JKQTPlotterSpecialStepLinePlot
  */
-class JKQTPLOTTER_LIB_EXPORT JKQTPSpecialLineHorizontalGraph: public JKQTPXYGraph, public JKQTPGraphLineStyleMixin, public JKQTPGraphFillStyleMixin, public JKQTPGraphSymbolStyleMixin {
+class JKQTPLOTTER_LIB_EXPORT JKQTPSpecialLineHorizontalGraph: public JKQTPXYGraph, public JKQTPGraphLineAndFillStyleMixin, public JKQTPGraphSymbolStyleMixin {
         Q_OBJECT
     public:
         /** \brief class constructor */
@@ -65,18 +65,11 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPSpecialLineHorizontalGraph: public JKQTPXYGrap
         /** \brief returns the color to be used for the key label */
         virtual QColor getKeyLabelColor() const override;
 
-        /*! sets whether to draw a line or not */
-        void setDrawLine(bool __value);
-        /*! returns whether the graph line is drawn */
-        bool getDrawLine() const;
+
         /*! sets whether to draw symbols */
         void setDrawSymbols(bool __value);
         /*! returns whether symbols are drawn */
         bool getDrawSymbols() const;
-        /*! sets whether to fill the space between the curve and the baseline/x-axis */
-        void setFillCurve(bool __value);
-        /*! returns whether the space between the curve and the baseline/x-axis is filled */
-        bool getFillCurve() const;
         /** \brief set the type of connecting (step-)lines */
         void setSpecialLineType(const JKQTPSpecialLineType & __value);
         /** \brief get the type of connecting (step-)lines */
@@ -88,12 +81,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPSpecialLineHorizontalGraph: public JKQTPXYGrap
         /** \brief set line-color, fill color and symbol color */
         void setColor(QColor c);
     protected:
-        /** \brief indicates whether to draw a line or not */
-        bool m_drawLine;
+
         /** \brief indicates whether to draw a symbols or not */
         bool m_drawSymbols;
-        /** \brief indicates whether to fill the space between the curve and the baseline/x-axis */
-        bool m_fillCurve;
         /** \brief type of connecting (step)lines */
         JKQTPSpecialLineType m_specialLineType;
         /** \brief baseline of the plot (NOTE: 0 is interpreted as until plot border in log-mode!!!) */
diff --git a/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp b/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp
index ab731c64cf..09c32eb0cf 100644
--- a/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp
+++ b/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp
@@ -567,7 +567,7 @@ double JKQTPGraphDecoratedHeadLineStyleMixin::calcHeadDecoratorSize(double line_
 
 
 JKQTPGraphLineAndFillStyleMixin::JKQTPGraphLineAndFillStyleMixin():
-    m_drawLine(true)
+    m_drawLine(true), m_fillCurve(true)
 {
 
 }
@@ -586,3 +586,18 @@ bool JKQTPGraphLineAndFillStyleMixin::doDrawLine() const
 {
     return m_drawLine;
 }
+
+void JKQTPGraphLineAndFillStyleMixin::setFillCurve(bool __value)
+{
+    m_fillCurve=__value;
+}
+
+bool JKQTPGraphLineAndFillStyleMixin::getFillCurve() const
+{
+    return m_fillCurve;
+}
+
+bool JKQTPGraphLineAndFillStyleMixin::doFillCurve() const
+{
+    return m_fillCurve;
+}
diff --git a/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.h b/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.h
index d3a0c3bc97..730363e0c5 100644
--- a/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.h
+++ b/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.h
@@ -461,10 +461,22 @@ public:
     bool getDrawLine() const;
     /*! \copydoc m_drawLine */
     bool doDrawLine() const;
+
+    /*! \copydoc m_fillCurve */
+    void setFillCurve(bool __value);
+    /*! \copydoc m_fillCurve */
+    bool getFillCurve() const;
+    /*! \copydoc m_fillCurve */
+    bool doFillCurve() const;
+
+
     Q_PROPERTY(bool drawLine MEMBER m_drawLine READ getDrawLine WRITE setDrawLine)
+    Q_PROPERTY(bool fillCurve MEMBER m_fillCurve READ getFillCurve WRITE setFillCurve)
 private:
     /** \brief indicates whether to draw a line on the circumference of the described area (i.e. along the data points from \c xColumn and \c yColumn as well as \c xColumn and \c yColumn2 or not */
     bool m_drawLine;
+    /** \brief indicates whether to fill the space between the curve and the x-axis */
+    bool m_fillCurve;
 };