breaking: made more functions and function parameters const

doc/dox/whatsnew.dox

@@ -28,6 +28,7 @@ Changes, compared to  \ref page_whatsnew_V2019_11 "v2019.11" include:
   <li>improved/breaking change: reworked class hierarchy of parsed function plots and declared several setters as slots.</li>
   <li>improved/breaking change: reworked class hierarchy of bar charts.</li>
   <li>improved/breaking change: reworked graph Base-Classes (promoted several setters to slots, added Q_PROPERTY- and Q_ENUM-declarations...)</li>
+  <li>improved/breaking change: made more functions and function parameters const</li>
   <li>bugfixed/improved: aspect ratio handling in JKQTPlotter.</li>
   <li>new: added geometric plot objects JKQTPGeoArrow to draw arrows (aka lines with added line-end decorators, also extended JKQTPGeoLine, JKQTPGeoInfiniteLine, JKQTPGeoPolyLines to draw line-end decorator (aka arrows)</li>
   <li>new: all geometric objects can either be drawn as graphic element (i.e. lines are straight line, even on non-linear axes), or as mathematical curve (i.e. on non-linear axes, lines become the appropriate curve representing the linear function, connecting the given start/end-points). The only exceptions are ellipses (and the derived arcs,pies,chords), which are always drawn as mathematical curves</li>

lib/jkqtplotter/graphs/jkqtpbarchartbase.cpp

@@ -173,45 +173,40 @@ bool JKQTPBarGraphBase::getValuesMinMax(double &mmin, double &mmax, double &smal
 
     if (getBarPositionColumn()<0 || getBarHeightColumn()<0) return false;
 
-    const size_t poscol=static_cast<size_t>(getBarPositionColumn());
     const size_t datacol=static_cast<size_t>(getBarHeightColumn());
 
     if (parent==nullptr) return false;
 
-    JKQTPDatastore* datastore=parent->getDatastore();
+    const JKQTPDatastore* datastore=parent->getDatastore();
-    int imin=0;
+    int imin=0, imax=0;
-    int imax=static_cast<int>(qMin(datastore->getRows(poscol), datastore->getRows(datacol)));
+    if (getIndexRange(imin, imax)) {
-    if (imax<imin) {
-        int h=imin;
-        imin=imax;
-        imax=h;
-    }
-    if (imin<0) imin=0;
-    if (imax<0) imax=0;
 
-    for (int i=imin; i<imax; i++) {
+
-        double stack=0;
+        for (int i=imin; i<imax; i++) {
-        double yv=baseline;
+            double stack=0;
-        const double boxstart=getParentStackedMax(i);
+            double yv=baseline;
-        if (hasStackParent()) {
+            const double boxstart=getParentStackedMax(i);
-            stack=boxstart;
+            if (hasStackParent()) {
-            yv=stack;
+                stack=boxstart;
-        }
+                yv=stack;
-        if (JKQTPIsOKFloat(yv)) {
+            }
-            if (yv>mmax) mmax=yv;
+            if (JKQTPIsOKFloat(yv)) {
-            if (yv<mmin) mmin=yv;
+                if (yv>mmax) mmax=yv;
-            double xvsgz;
+                if (yv<mmin) mmin=yv;
-            xvsgz=yv; SmallestGreaterZeroCompare_xvsgz();
+                double xvsgz;
-        }
+                xvsgz=yv; SmallestGreaterZeroCompare_xvsgz();
-        yv=stack+datastore->get(datacol,static_cast<size_t>(i));
+            }
-        if (JKQTPIsOKFloat(yv)) {
+            yv=stack+datastore->get(datacol,static_cast<size_t>(i));
-            if (yv>mmax) mmax=yv;
+            if (JKQTPIsOKFloat(yv)) {
-            if (yv<mmin) mmin=yv;
+                if (yv>mmax) mmax=yv;
-            double xvsgz;
+                if (yv<mmin) mmin=yv;
-            xvsgz=yv; SmallestGreaterZeroCompare_xvsgz();
+                double xvsgz;
+                xvsgz=yv; SmallestGreaterZeroCompare_xvsgz();
+            }
         }
+        return true;
     }
-    return true;
+    return false;
 }
 
 bool JKQTPBarGraphBase::getPositionsMinMax(double &mmin, double &mmax, double &smallestGreaterZero)
@@ -224,50 +219,43 @@ bool JKQTPBarGraphBase::getPositionsMinMax(double &mmin, double &mmax, double &s
     if (getBarPositionColumn()<0 || getBarHeightColumn()<0) return false;
 
     const size_t poscol=static_cast<size_t>(getBarPositionColumn());
-    const size_t datacol=static_cast<size_t>(getBarHeightColumn());
 
     if (parent==nullptr) return false;
 
-    JKQTPDatastore* datastore=parent->getDatastore();
+    const JKQTPDatastore* datastore=parent->getDatastore();
-    int imin=0;
+    int imin=0, imax=0;
-    int imax=static_cast<int>(qMin(datastore->getRows(poscol), datastore->getRows(datacol)));
+    if (getIndexRange(imin, imax)) {
-    if (imax<imin) {
+        for (int i=imin; i<imax; i++) {
-        int h=imin;
+            double xv=datastore->get(poscol,static_cast<size_t>(i));
-        imin=imax;
+            int sr=datastore->getNextLowerIndex(poscol, i);
-        imax=h;
+            int lr=datastore->getNextHigherIndex(poscol, i);
-    }
+            double delta, deltap, deltam;
-    if (imin<0) imin=0;
-    if (imax<0) imax=0;
 
-    for (int i=imin; i<imax; i++) {
+            if (sr<0 && lr<0) { // only one x-value
-        double xv=datastore->get(poscol,static_cast<size_t>(i));
+                deltam=0.5;
-        int sr=datastore->getNextLowerIndex(poscol, i);
+                deltap=0.5;
-        int lr=datastore->getNextHigherIndex(poscol, i);
+            } else if (lr<0) { // the right-most x-value
-        double delta, deltap, deltam;
+                deltap=deltam=fabs(xv-datastore->get(poscol,sr))/2.0;
+            } else if (sr<0) { // the left-most x-value
+                deltam=deltap=fabs(datastore->get(poscol,lr)-xv)/2.0;
+            } else {
+                deltam=fabs(xv-datastore->get(poscol,sr))/2.0;
+                deltap=fabs(datastore->get(poscol,lr)-xv)/2.0;
+            }
+            delta=deltap+deltam;
 
-        if (sr<0 && lr<0) { // only one x-value
+            if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(delta) ) {
-            deltam=0.5;
+
-            deltap=0.5;
+                if (start || xv+shift*delta+width*delta/2.0>mmax) mmax=xv+shift*delta+width*delta/2.0;
-        } else if (lr<0) { // the right-most x-value
+                if (start || xv+shift*delta-width*delta/2.0<mmin) mmin=xv+shift*delta-width*delta/2.0;
-            deltap=deltam=fabs(xv-datastore->get(poscol,sr))/2.0;
+                double xvsgz;
-        } else if (sr<0) { // the left-most x-value
+                xvsgz=xv+shift*delta+width*delta/2.0; SmallestGreaterZeroCompare_xvsgz();
-            deltam=deltap=fabs(datastore->get(poscol,lr)-xv)/2.0;
+                xvsgz=xv+shift*delta-width*delta/2.0; SmallestGreaterZeroCompare_xvsgz();
-        } else {
+                start=false;
-            deltam=fabs(xv-datastore->get(poscol,sr))/2.0;
+            }
-            deltap=fabs(datastore->get(poscol,lr)-xv)/2.0;
-        }
-        delta=deltap+deltam;
-
-        if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(delta) ) {
-
-            if (start || xv+shift*delta+width*delta/2.0>mmax) mmax=xv+shift*delta+width*delta/2.0;
-            if (start || xv+shift*delta-width*delta/2.0<mmin) mmin=xv+shift*delta-width*delta/2.0;
-            double xvsgz;
-            xvsgz=xv+shift*delta+width*delta/2.0; SmallestGreaterZeroCompare_xvsgz();
-            xvsgz=xv+shift*delta-width*delta/2.0; SmallestGreaterZeroCompare_xvsgz();
-            start=false;
         }
+        return !start;
     }
-    return !start;
+    return false;
 }
 

lib/jkqtplotter/graphs/jkqtpfilledcurve.h

@@ -163,11 +163,11 @@ public:
     virtual QColor getKeyLabelColor() const override;
 
     /*! \copydoc yColumn2 */
-        void setYColumn2(int __value);
+    void setYColumn2(int __value);
     /*! \copydoc yColumn2 */
-        int getYColumn2() const;
+    int getYColumn2() const;
     /*! \copydoc yColumn2 */
-        void setYColumn2 (size_t __value);
+    void setYColumn2 (size_t __value);
 
     /*! \copydoc drawLine */
     void setDrawLine(bool __value);

lib/jkqtplotter/graphs/jkqtpscatter.cpp

@@ -986,7 +986,7 @@ void JKQTPXYParametrizedErrorScatterGraph::drawErrorsBefore(JKQTPEnhancedPainter
     else plotErrorIndicators(painter, parent, this, xColumn, yColumn, 0, 0, &sortedIndices);
 }
 
-bool JKQTPXYParametrizedErrorScatterGraph::intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter &/*painter*/, JKQTBasePlotter * /*parent*/, JKQTPGraph* /*parentGraph*/, int /*xColumn*/, int /*yColumn*/, int /*xErrorColumn*/, int /*yErrorColumn*/, JKQTPErrorPlotstyle /*xErrorStyle*/, JKQTPErrorPlotstyle /*yErrorStyle*/, int index, QColor &errorLineColor, QColor &errorFillColor)
+bool JKQTPXYParametrizedErrorScatterGraph::intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter &/*painter*/, const JKQTBasePlotter * /*parent*/, const JKQTPGraph * /*parentGraph*/, int /*xColumn*/, int /*yColumn*/, int /*xErrorColumn*/, int /*yErrorColumn*/, JKQTPErrorPlotstyle /*xErrorStyle*/, JKQTPErrorPlotstyle /*yErrorStyle*/, int index, QColor &errorLineColor, QColor &errorFillColor) const
 {
     QColor c=getLocalColor(index);
     errorLineColor=c.darker();

lib/jkqtplotter/graphs/jkqtpscatter.h

@@ -436,7 +436,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXYParametrizedErrorScatterGraph: public JKQTPX
         /** \brief this function can be used to set the color of the error indicators automatically
          *
          * return \c true and the colors to use, if applicable, the default implementation returns false */
-        virtual bool intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int index, QColor& errorLineColor, QColor& errorFillColor) override;
+        virtual bool intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter& painter, const JKQTBasePlotter* parent, const JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int index, QColor& errorLineColor, QColor& errorFillColor) const override;
 
 };
 

lib/jkqtplotter/graphs/jkqtpviolinplotstylingmixins.cpp

@@ -921,7 +921,7 @@ void JKQTPGraphViolinplotStyleMixin::plotHorizontalViolinplot(JKQTBasePlotter *p
     }
 }
 
-void JKQTPGraphViolinplotStyleMixin::plotVerticalKeyMarker(JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, const QRectF &rect)
+void JKQTPGraphViolinplotStyleMixin::plotVerticalKeyMarker(JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, const QRectF &rect) const
 {
     painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
     QPen p=getLinePenForRects(painter, parent);
@@ -967,7 +967,7 @@ void JKQTPGraphViolinplotStyleMixin::plotVerticalKeyMarker(JKQTBasePlotter *pare
 }
 
 
-void JKQTPGraphViolinplotStyleMixin::plotHorizontalKeyMarker(JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, const QRectF &rect)
+void JKQTPGraphViolinplotStyleMixin::plotHorizontalKeyMarker(JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, const QRectF &rect) const
 {
     painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
 

lib/jkqtplotter/graphs/jkqtpviolinplotstylingmixins.h

@@ -377,10 +377,10 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGraphViolinplotStyleMixin: public JKQTPGraphLi
         void plotHorizontalViolinplot(JKQTBasePlotter* parent, JKQTPEnhancedPainter &painter, double yp, double ypbottom, double yptop, const QVector<double>& violin_cat, const QVector<double>& violin_freq, double minp, double medianp, double maxp, double meanp=JKQTP_NAN) const;
 
         /** \brief draw a small, stylized, vertical symbol into \a rect that symbolizes a boxplot, e.g. in a plot legend */
-        void plotVerticalKeyMarker(JKQTBasePlotter* parent, JKQTPEnhancedPainter &painter, const QRectF& rect);
+        void plotVerticalKeyMarker(JKQTBasePlotter* parent, JKQTPEnhancedPainter &painter, const QRectF& rect) const;
 
         /** \brief draw a small, stylized, horizontal symbol into \a rect that symbolizes a boxplot, e.g. in a plot legend */
-        void plotHorizontalKeyMarker(JKQTBasePlotter* parent, JKQTPEnhancedPainter &painter, const QRectF& rect);
+        void plotHorizontalKeyMarker(JKQTBasePlotter* parent, JKQTPEnhancedPainter &painter, const QRectF& rect) const;
     private:
         /** \brief which symbol to use for the datapoints */
         JKQTPGraphSymbols m_meanSymbolType;

lib/jkqtplotter/jkqtpcoordinateaxes.cpp

@@ -81,6 +81,10 @@ JKQTMathText* JKQTPCoordinateAxis::getParentMathText() {
     return parent->getMathText();
 }
 
+const JKQTMathText* JKQTPCoordinateAxis::getParentMathText() const {
+    return parent->getMathText();
+}
+
 void JKQTPCoordinateAxis::clearAxisTickLabels() {
     tickLabels.clear();
     redrawPlot();
@@ -357,7 +361,7 @@ double JKQTPCoordinateAxis::calcLogTickSpacing() {
 }
 
 
-QString JKQTPCoordinateAxis::floattolabel(double data) {
+QString JKQTPCoordinateAxis::floattolabel(double data) const {
     int past_comma=axisStyle.labelDigits;
     const bool remove_trail0=true;
     QLocale loc=QLocale::system();
@@ -414,7 +418,7 @@ QString JKQTPCoordinateAxis::floattolabel(double data) {
     return QString();
 }
 
-QString JKQTPCoordinateAxis::floattolabel(double data, int past_comma) {
+QString JKQTPCoordinateAxis::floattolabel(double data, int past_comma) const {
     bool remove_trail0=true;
     QLocale loc=QLocale::system();
     loc.setNumberOptions(QLocale::OmitGroupSeparator);

lib/jkqtplotter/jkqtpcoordinateaxes.h

@@ -565,6 +565,12 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
     protected:
         /** \brief indicates whether one of the parameters has changed sinse the last recalculation of tickSpacing ... */
         bool paramsChanged;
+        /** \brief can be used to switch off calcPlotScaling() temporarily, while modifying some properties
+         *
+         *  use setDoUpdateScaling() to set this property
+         *
+         *  \see setDoUpdateScaling() and getDoUpdateScaling()
+         */
         bool doUpdateScaling;
 
         /** \brief simply calls the redrawPlot method of the parent plotter class */
@@ -577,14 +583,16 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
          */
         QVector<QPair<double, QString> > tickLabels;
         /** \brief retun parents JKQTMathText* object */
-        virtual JKQTMathText* getParentMathText();
+        JKQTMathText* getParentMathText();
+        /** \brief retun parents JKQTMathText* object */
+        const JKQTMathText* getParentMathText() const;
 
 
         /** \brief convert a float to a tick label string */
-        QString floattolabel(double data);
+        QString floattolabel(double data) const;
 
         /** \brief convert a float to a tick label string with a given precision */
-        QString floattolabel(double data, int past_comma);
+        QString floattolabel(double data, int past_comma) const;
         /** \brief parent plotter class */
         JKQTBasePlotter* parent;
         /** \brief current view: minimum of time axis */

lib/jkqtplotter/jkqtpgraphsbase.h

@@ -98,6 +98,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPPlotElement: public QObject {
         /*! \brief returns whether the graph is shown in a highlighted style in the plot */
         bool isHighlighted() const;
 
+        /** \brief returns the parent painter class */
+        inline const JKQTBasePlotter* getParent() const { return parent; }
         /** \brief returns the parent painter class */
         inline JKQTBasePlotter* getParent() { return parent; }
         /** \brief sets the parent painter class */
@@ -620,7 +622,7 @@ protected:
      *
      * \see setDataSortOrder(), getDataSortOrder()
      * */
-    inline int getDataIndex(int i) {
+    inline int getDataIndex(int i) const {
         if (sortData==Unsorted) return i;
         return sortedIndices.value(i,i);
     }
@@ -688,7 +690,7 @@ protected:
      * \param[out] imax last usable row-index
      *  \return \c true on success and \c false if the information is not available
      */
-    virtual bool getIndexRange(int &imin, int &imax) const;
+    virtual bool getIndexRange(int &imin, int &imax) const override;
 };
 
 
@@ -745,7 +747,7 @@ protected:
      * \param[out] imax last usable row-index
      *  \return \c true on success and \c false if the information is not available
      */
-    virtual bool getIndexRange(int &imin, int &imax) const;
+    virtual bool getIndexRange(int &imin, int &imax) const override;
 };
 
 
@@ -831,7 +833,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPSingleColumnGraph: public JKQTPGraph {
          * This function can beu used to get the correct datapoint after sorting the datapoints,
          * As sorting is done by sorting an index and not reordering the data in the columns themselves.
          * */
-        inline int getDataIndex(int i) {
+        inline int getDataIndex(int i) const {
             if (sortData==Unsorted) return i;
             return sortedIndices.value(i,i);
         }

lib/jkqtplotter/jkqtpgraphsbaseerrors.cpp

@@ -79,21 +79,21 @@ void JKQTPGraphErrorStyleMixin::setErrorColorFromGraphColor(QColor graphColor)
     //errorColor.setAlphaF(0.5);
 }
 
-QPen JKQTPGraphErrorStyleMixin::getErrorLinePen(JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
+QPen JKQTPGraphErrorStyleMixin::getErrorLinePen(JKQTPEnhancedPainter &painter, const JKQTBasePlotter *parent) const
 {
     QPen p=m_errorLinePen;
     p.setWidthF(qMax(JKQTPlotterDrawingTools::ABS_MIN_LINEWIDTH,parent->pt2px(painter, parent->getLineWidthMultiplier()*m_errorLineWidth)));
     return p;
 }
 
-QPen JKQTPGraphErrorStyleMixin::getErrorLinePenForRects(JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
+QPen JKQTPGraphErrorStyleMixin::getErrorLinePenForRects(JKQTPEnhancedPainter &painter, const JKQTBasePlotter *parent) const
 {
     QPen p=getErrorLinePen(painter, parent);
     p.setJoinStyle(Qt::MiterJoin);
     return p;
 }
 
-QBrush JKQTPGraphErrorStyleMixin::getErrorFillBrush(JKQTPEnhancedPainter &/*painter*/, JKQTBasePlotter * /*parent*/) const
+QBrush JKQTPGraphErrorStyleMixin::getErrorFillBrush(JKQTPEnhancedPainter &/*painter*/, const JKQTBasePlotter * /*parent*/) const
 {
     return m_errorFillBrush;
 }
@@ -259,10 +259,10 @@ void JKQTPGraphErrorStyleMixin::setErrorFillTransform(const QTransform &b)
     m_errorFillBrush.setTransform(b);
 }
 
-void JKQTPGraphErrorStyleMixin::intPlotXYErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int xErrorColumnLower, int yErrorColumnLower, bool xErrorSymmetric, bool yErrorSymmetric, double xrelshift, double yrelshift, const  QVector<int>* dataorder) {
+void JKQTPGraphErrorStyleMixin::intPlotXYErrorIndicators(JKQTPEnhancedPainter& painter, const JKQTBasePlotter* parent, const JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int xErrorColumnLower, int yErrorColumnLower, bool xErrorSymmetric, bool yErrorSymmetric, double xrelshift, double yrelshift, const  QVector<int>* dataorder) const {
     //std::cout<<"JKQTPGraphErrors::intPlotXYErrorIndicators(p, "<<parent<<", "<<xColumn<<", "<<yColumn<<", "<<xErrorColumn<<", "<<yErrorColumn<<", "<<xErrorStyle<<", "<<yErrorStyle<<", ...)\n";
     if (parent==nullptr) return;
-    JKQTPDatastore* datastore=parent->getDatastore();
+    const JKQTPDatastore* datastore=parent->getDatastore();
     if (datastore==nullptr) return;
 
     if ((yErrorStyle==JKQTPNoError) && (xErrorStyle==JKQTPNoError)) return;
@@ -561,7 +561,7 @@ void JKQTPGraphErrorStyleMixin::intPlotXYErrorIndicators(JKQTPEnhancedPainter& p
     //std::cout<<"end\n";
 }
 
-bool JKQTPGraphErrorStyleMixin::intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter &/*painter*/, JKQTBasePlotter * /*parent*/, JKQTPGraph* /*parentGraph*/, int /*xColumn*/, int /*yColumn*/, int /*xErrorColumn*/, int /*yErrorColumn*/, JKQTPErrorPlotstyle /*xErrorStyle*/, JKQTPErrorPlotstyle /*yErrorStyle*/, int /*index*/, QColor &/*errorColor*/, QColor &/*errorFillColor*/)
+bool JKQTPGraphErrorStyleMixin::intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter &/*painter*/, const JKQTBasePlotter * /*parent*/, const JKQTPGraph* /*parentGraph*/, int /*xColumn*/, int /*yColumn*/, int /*xErrorColumn*/, int /*yErrorColumn*/, JKQTPErrorPlotstyle /*xErrorStyle*/, JKQTPErrorPlotstyle /*yErrorStyle*/, int /*index*/, QColor &/*errorColor*/, QColor &/*errorFillColor*/) const
 {
     return false;
 }
@@ -735,7 +735,7 @@ bool JKQTPXGraphErrors::errorUsesColumn(int c) const
     return c==(xErrorColumn) || (c==xErrorColumnLower);
 }
 
-void JKQTPXGraphErrors::plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph *parentGraph, int xColumn, int yColumn, double xrelshift, double yrelshift, const  QVector<int>* dataorder) {
+void JKQTPXGraphErrors::plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph *parentGraph, int xColumn, int yColumn, double xrelshift, double yrelshift, const  QVector<int>* dataorder) const {
     intPlotXYErrorIndicators(painter, parent, parentGraph, xColumn, yColumn, xErrorColumn, -1, xErrorStyle, JKQTPNoError, xErrorColumnLower, -1, xErrorSymmetric, true, xrelshift, yrelshift, dataorder);
 }
 
@@ -747,7 +747,7 @@ JKQTPYGraphErrors::JKQTPYGraphErrors()
 {
 }
 
-void JKQTPYGraphErrors::plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift, double yrelshift, const  QVector<int>* dataorder) {
+void JKQTPYGraphErrors::plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift, double yrelshift, const  QVector<int>* dataorder) const {
     intPlotXYErrorIndicators(painter, parent, parentGraph, xColumn, yColumn, -1, yErrorColumn, JKQTPNoError, yErrorStyle, -1, yErrorColumnLower, true, yErrorSymmetric, xrelshift, yrelshift, dataorder);
 }
 
@@ -767,7 +767,7 @@ JKQTPXYGraphErrors::JKQTPXYGraphErrors()
 
 }
 
-void JKQTPXYGraphErrors::plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift, double yrelshift, const  QVector<int>* dataorder) {
+void JKQTPXYGraphErrors::plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift, double yrelshift, const  QVector<int>* dataorder) const {
     this->intPlotXYErrorIndicators(painter, parent, parentGraph, xColumn, yColumn, xErrorColumn, yErrorColumn, xErrorStyle, yErrorStyle, xErrorColumnLower, yErrorColumnLower, xErrorSymmetric, yErrorSymmetric, xrelshift, yrelshift, dataorder);
 }
 

lib/jkqtplotter/jkqtpgraphsbaseerrors.h

@@ -169,20 +169,20 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPGraphErrorStyleMixin {
 
 
         /** \brief constructs a QPen from the error indicator line styling properties */
-        QPen getErrorLinePen(JKQTPEnhancedPainter &painter, JKQTBasePlotter* parent) const;
+        QPen getErrorLinePen(JKQTPEnhancedPainter &painter, const JKQTBasePlotter* parent) const;
         /** \brief constructs a QPen from the error indicator line styling properties, suitable for drawing rectangles with sharp edges */
-        QPen getErrorLinePenForRects(JKQTPEnhancedPainter &painter, JKQTBasePlotter* parent) const;
+        QPen getErrorLinePenForRects(JKQTPEnhancedPainter &painter, const JKQTBasePlotter* parent) const;
 
         /** \brief constructs a QBrush from the error indicator fill styling properties */
-        QBrush getErrorFillBrush(JKQTPEnhancedPainter &painter, JKQTBasePlotter* parent) const;
+        QBrush getErrorFillBrush(JKQTPEnhancedPainter &painter, const JKQTBasePlotter *parent) const;
 
         /** \brief draw error indicators with the parameters defined in this class. The position of the datapoints is
          *         given by the \a xColumn and \a yColumn. It is also possible to specify a datarange. */
-        void intPlotXYErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int xErrorColumnLower=-1, int yErrorColumnLower=-1, bool xErrorSymmetric=true, bool yErrorSymmetric=true, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr);
+        void intPlotXYErrorIndicators(JKQTPEnhancedPainter& painter, const JKQTBasePlotter *parent, const JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int xErrorColumnLower=-1, int yErrorColumnLower=-1, bool xErrorSymmetric=true, bool yErrorSymmetric=true, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) const;
         /** \brief this function can be used to set the color of the error indicators automatically
          *
          * return \c true and the colors to use, if applicable, the default implementation returns false */
-        virtual bool intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int index, QColor& errorLineColor, QColor& errorFillColor);
+        virtual bool intPlotXYErrorIndicatorsGetColor(JKQTPEnhancedPainter& painter, const JKQTBasePlotter* parent, const JKQTPGraph *parentGraph, int xColumn, int yColumn, int xErrorColumn, int yErrorColumn, JKQTPErrorPlotstyle xErrorStyle, JKQTPErrorPlotstyle yErrorStyle, int index, QColor& errorLineColor, QColor& errorFillColor) const;
 };
 
 
@@ -301,7 +301,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXGraphErrors: public JKQTPXGraphErrorData, pub
 
     protected:
         /** \brief draws the error indicators */
-        virtual void plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) ;
+        virtual void plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) const ;
 
 };
 
@@ -323,7 +323,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPYGraphErrors: public JKQTPYGraphErrorData, pub
 
     protected:
         /** \brief draws the error indicators */
-        virtual void plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) ;
+        virtual void plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) const ;
 
 };
 
@@ -347,7 +347,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXYGraphErrors: public JKQTPXGraphErrorData, pu
 
     protected:
         /** \brief draws the error indicators */
-        virtual void plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) ;
+        virtual void plotErrorIndicators(JKQTPEnhancedPainter& painter, JKQTBasePlotter* parent, JKQTPGraph* parentGraph, int xColumn, int yColumn, double xrelshift=0, double yrelshift=0.0, const QVector<int> *dataorder=nullptr) const ;
 
 };