NEW: stacked barcharts may have a small separation (default 1pt)

NEW: autoscaling for barcharts works now, also when stacked and unstacked charts are combined in one plot
NEW: proper styling for financial graphs in style.ini-files
REWORKED: separation and gruping factor for barcharts on autoscaling
doc update

.gitignore

@@ -183,3 +183,7 @@ Sicherungskopie_*
 /doc/images/JKQTPGLabelCenteredOnData_small.png
 /lib/jkqtplotter/resources/styles/default.ini.export.png
 /lib/jkqtplotter/resources/styles/default.ini.png
+/doc/images/JKQTPBarHorizontalAutoscaleMaxWidthOnly_small.png
+/doc/images/JKQTPBarHorizontalAutoscaleShrinkOnly_small.png
+/doc/images/JKQTPBarVerticalAutoscaleMaxWidthOnly_small.png
+/doc/images/JKQTPBarVerticalAutoscaleShrinkOnly_small.png

doc/CMakeLists.txt

@@ -260,7 +260,7 @@ if(JKQtPlotter_BUILD_EXAMPLES)
         stackedbars/JKQTPbarVerticalGraphStacked,JKQTPbarHorizontalGraphStacked/--smallscreenshotplot
         scatter/JKQTPXYScatterGraph,JKQTPXYScatterErrorGraph/--smallscreenshotplot
         simpletest/JKQTPXYLineGraph/--smallscreenshotplot
-        barchart/JKQTPBarVerticalGraph,JKQTPBarHorizontalGraph,JKQTPBarVerticalGraphNoBaseline,JKQTPBarHorizontalGraphNoBaseline,JKQTPBarVerticalGraphBaseline,JKQTPBarHorizontalGraphBaseline/--iteratefunctorsteps--smallscreenshotplot
+        barchart/JKQTPBarVerticalGraph,JKQTPBarHorizontalGraph,JKQTPBarVerticalGraphNoBaseline,JKQTPBarHorizontalGraphNoBaseline,JKQTPBarVerticalGraphBaseline,JKQTPBarHorizontalGraphBaseline,JKQTPBarVerticalAutoscaleShrinkOnly,JKQTPBarHorizontalAutoscaleShrinkOnly,JKQTPBarVerticalAutoscaleMaxWidthOnly,JKQTPBarHorizontalAutoscaleMaxWidthOnly/--iteratefunctorsteps--smallscreenshotplot
         barchart_twocolor/JKQTPBarVerticalGraphTwoColorFilling,JKQTPBarHorizontalGraphTwoColorFilling/--smallscreenshotplot
         barchart_errorbars/JKQTPBarVerticalErrorGraph,JKQTPBarHorizontalErrorGraph/--smallscreenshotplot
         barchart_functorfill/JKQTPBarVerticalGraphFunctorFilling,JKQTPBarHorizontalGraphFunctorFilling/--smallscreenshotplot

doc/dox/whatsnew.dox

@@ -64,6 +64,7 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>FIXED/REWORKED issue <a href="https://github.com/jkriege2/JKQtPlotter/issues/111">#111: Can't write to PDF files with JKQTPlotter::saveImage() when passing a filename ending in ".pdf"</a> (thanks to <a href="https://github.com/fpalazzolo">user:fpalazzolo</a> for reporting):<br/>While fixing this issue, the functions JKQTBasePlotter::saveImage() etc. gained a bool return value to indicate whether sacing was successful.</li>
     <li>IMPROVED/FIXED outside space requirements for color bars. Text was sometime too close to the plot border.</li>
     <li>REWORKED JKQTBasePlotter::saveData() with a more consistent interface and a bool return value to indicate success or failure + improved documentation, added methods to JKQTPSaveDataAdapter that allow to specify file extensions and an ID for the plugin.</li>
+    <li>REWORKED: separation and gruping factor for barcharts on autoscaling</li>
     <li>REORGANIZED: separated line-graphs from jkqtpscatter.h/.cpp into jkqtplines.h/.cpp</li>
     <li>IMPROVED: QT6-compatibility by removing deprecated warnings</li>
     <li>IMPROVED: added missing override declarations</li>
@@ -132,6 +133,8 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>NEW: JKQTPVectorFieldGraph for drawing "simple" vector fields/quiver plots (+example \ref JKQTPlotterVectorFieldExample)</li>
     <li>NEW: JKQTPParametrizedVectorFieldGraph for drawing color-coded vector fields/quiver plots (+example \ref JKQTPParametrizedVectorFieldGraphExample)</li>
     <li>NEW: JKQTPFinancialGraph for drawing candlestick or OHLC graphs of financial data, such as stock amrket prices (+example \ref JKQTPlotterFinancialChartExample)</li>
+    <li>NEW: stacked barcharts may have a small separation (default 1pt)</li>
+    <li>NEW: autoscaling for barcharts works now, also when stacked and unstacked charts are combined in one plot</li>
   </ul></li>
   
   <li>JKQTMathText:<ul>

examples/barchart/barchart.cpp

@@ -66,7 +66,7 @@ std::vector<TCHART*> doExample(JKQTPlotter& plot, const QString& title)
     //    This function searches all JKQTPBarHorizontalGraph in the current
     //    plot and sets their shift/scale so they form a nice plot with
     //    side-by-side groups
-    graph1->autoscaleBarWidthAndShift(0.75, 1);
+    graph1->autoscaleBarWidthAndShift();
 
     if (dynamic_cast<JKQTPBarVerticalGraph*>(graph1)!=nullptr) {
         // 7. data is grouped into 5 numbere groups (1..5), but we also have string
@@ -126,6 +126,8 @@ int main(int argc, char* argv[])
         plotV.getYAxis()->setShowZeroAxis(false);
         plotH.getXAxis()->setShowZeroAxis(false);
         plotH.getYAxis()->setShowZeroAxis(false);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
     });
 
     app.addExportStepFunctor([&](){
@@ -139,6 +141,42 @@ int main(int argc, char* argv[])
         plotV.getYAxis()->setShowZeroAxis(false);
         plotH.getXAxis()->setShowZeroAxis(false);
         plotH.getYAxis()->setShowZeroAxis(false);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+
+    app.addExportStepFunctor([&](){
+        for (auto g: gV) {
+            g->setDrawBaseline(false);
+        }
+        for (auto g: gH) {
+            g->setDrawBaseline(false);
+        }
+        gV[0]->autoscaleBarWidthAndShift(1,0.9);
+        gH[0]->autoscaleBarWidthAndShift(1,0.9);
+        plotV.getXAxis()->setShowZeroAxis(false);
+        plotV.getYAxis()->setShowZeroAxis(false);
+        plotH.getXAxis()->setShowZeroAxis(false);
+        plotH.getYAxis()->setShowZeroAxis(false);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+
+    app.addExportStepFunctor([&](){
+        for (auto g: gV) {
+            g->setDrawBaseline(false);
+        }
+        for (auto g: gH) {
+            g->setDrawBaseline(false);
+        }
+        gV[0]->autoscaleBarWidthAndShift(0.75,1);
+        gH[0]->autoscaleBarWidthAndShift(0.75,1);
+        plotV.getXAxis()->setShowZeroAxis(false);
+        plotV.getYAxis()->setShowZeroAxis(false);
+        plotH.getXAxis()->setShowZeroAxis(false);
+        plotH.getYAxis()->setShowZeroAxis(false);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
     });
     return app.exec();
 }

examples/multithreaded/README.md

@@ -97,10 +97,10 @@ This test results in the following numbers (on my AMD Ryzen5 8/16-core laptop):
 <b>VERSION:</b> 5.0.0
 <b>BUILD MODE:</b> Debug
 
-<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 13010.9ms<br/>single runtimes = (542.0 +/- 1807.8) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/><br/>  
+<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 12224.1ms<br/>single runtimes = (509.2 +/- 1614.8) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/><br/>  
 
 <u><b>PARALLEL RESULTS:</b></u><br/>
-runtime, overall = 2652.2ms<br/>single runtimes = (690.9 +/- 79.5) ms<br/>speedup = 6.25x<br/>threads / available = 8 / 16<br/>batch runs = 3<br/><br/><b>speedup vs. serial = 4.9x</b>
+runtime, overall = 2905.3ms<br/>single runtimes = (746.9 +/- 66.6) ms<br/>speedup = 6.17x<br/>threads / available = 8 / 16<br/>batch runs = 3<br/><br/><b>speedup vs. serial = 4.2x</b>
 
 [comment]:RESULTS_END
 

examples/styling/build_test_graphs.h

@@ -5,6 +5,7 @@
 #include "jkqtplotter/graphs/jkqtpbarchart.h"
 #include "jkqtplotter/graphs/jkqtpimage.h"
 #include "jkqtplotter/graphs/jkqtpgeometric.h"
+#include "jkqtplotter/graphs/jkqtpfinancial.h"
 #include "jkqtplotter/graphs/jkqtpgeoannotations.h"
 #include "jkqtplotter/graphs/jkqtpboxplot.h"
 #include "jkqtplotter/graphs/jkqtpfilledcurve.h"
@@ -30,6 +31,7 @@ inline void setupGridPrintingAndDatastores(QVector<JKQTBasePlotter*>& plots, QSi
 }
 
 inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
+    JKQTPFinancialGraph::clearColorAssignStore();
 
     // 0. get a pointer to the internal datastore (for convenience)
     JKQTPDatastore* ds=plots.first()->getDatastore();
@@ -41,7 +43,7 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     ds->clear();
 
     // 2. now we create data for a simple plot (a sine curve)
-    QVector<double> X, Y1, Y2, img, X3, Y3, Y3err, Xbar, Ybar, Ybar2, Ybar3, Y4, Y5, XImp, YImp, XBP, MinBP, Q25BP, MeanBP, MedianBP, Q75BP, MaxBP;
+    QVector<double> X, Y1, Y2, img, X3, Y3, Y3err, Xbar, Ybar, Ybar2, Ybar2s1, Ybar2s2, Ybar3, Y4, Y5, XImp, YImp, XBP, MinBP, Q25BP, MeanBP, MedianBP, Q75BP, MaxBP, TFin, OFin1,CFin1,LFin1,HFin1, OFin2,CFin2,LFin2,HFin2;
     const int Ndata=50;
     for (int i=0; i<Ndata; i++) {
         const double x=double(i)/double(Ndata)*8.0*JKQTPSTATISTICS_PI;
@@ -58,7 +60,9 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
         if (i>0 && i%16==0) {
             Xbar<<x;
             Ybar<<(double(i+5)/double(Ndata)*(1.5));
-            Ybar2<<(double(i+5)/double(Ndata)*(1.2));
+            Ybar2<<(double(i+5)/double(Ndata)*(0.6));
+            Ybar2s1 << 0.1+(double(i+5)/double(Ndata)*(0.3));
+            Ybar2s2 << 0.5-(double(i+5)/double(Ndata)*(0.4));
             Ybar3<<(3.0-(double(i+5)/double(Ndata)*(3.7)));
         }
         if (i%8==0) {
@@ -74,6 +78,17 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
             Q75BP<<(i*1.3+6.0);
             MaxBP<<(i*1.35+7.5);
         }
+        if (i<=10) {
+            TFin << (i+1);
+            OFin1 << CFin1.value(CFin1.size()-1,30)+3.0*sin(i);
+            CFin1 << OFin1.value(OFin1.size()-1,30)+3.0*cos(i);
+            HFin1 << qMax(OFin1.last(),CFin1.last())+2;
+            LFin1 << qMin(OFin1.last(),CFin1.last())-2;
+            OFin2 << CFin2.value(CFin2.size()-1,20)+2.0*cos(i);
+            CFin2 << OFin2.value(OFin2.size()-1,20)+2.0*sin(i);
+            HFin2 << qMax(OFin2.last(),CFin2.last())+2;
+            LFin2 << qMin(OFin2.last(),CFin2.last())-2;
+        }
     }
     auto fgauss=[](double x, double y, double x0, double y0, double sx, double sy) {
         return exp(-2.0*(x-x0)*(x-x0)/sx/sx-2.0*(y-y0)*(y-y0)/sy/sy);
@@ -99,6 +114,8 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     size_t columnXbar=ds->addCopiedColumn(Xbar, "xbar");
     size_t columnYbar=ds->addCopiedColumn(Ybar, "ybar");
     size_t columnYbar2=ds->addCopiedColumn(Ybar2, "Ybar2");
+    size_t columnYbar2s1=ds->addCopiedColumn(Ybar2s1, "Ybar2, stack1");
+    size_t columnYbar2s2=ds->addCopiedColumn(Ybar2s2, "Ybar2, stack2");
     size_t columnYbar3=ds->addCopiedColumn(Ybar3, "Ybar3");
     size_t columnY4=ds->addCopiedColumn(Y4, "y4");
     size_t columnY5=ds->addCopiedColumn(Y5, "y5");
@@ -113,6 +130,8 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     size_t columnQ75BP=ds->addCopiedColumn(Q75BP, "Q75BP");
     size_t columnMaxBP=ds->addCopiedColumn(MaxBP, "MaxBP");
 
+    size_t columnFinT=ds->addCopiedColumn(TFin, "FinT");
+
     // 4. create diverse graphs in the plot:
     JKQTPFilledCurveXGraph* graphf4=new JKQTPFilledCurveXGraph(plots[2]);
     graphf4->setXColumn(columnX);
@@ -201,18 +220,33 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     graphb->setTitle(QObject::tr("barchart"));
     plots[3]->addGraph(graphb);
 
-    JKQTPBarVerticalGraph* graphb2=new JKQTPBarVerticalGraph(plots[3]);
+    JKQTPBarVerticalStackableGraph* graphb2=new JKQTPBarVerticalStackableGraph(plots[3]);
     graphb2->setXColumn(columnXbar);
     graphb2->setYColumn(columnYbar2);
     graphb2->setTitle(QObject::tr("2^{nd} barchart"));
     plots[3]->addGraph(graphb2);
 
+    JKQTPBarVerticalStackableGraph* graphb2s1=new JKQTPBarVerticalStackableGraph(plots[3]);
+    graphb2s1->setXColumn(columnXbar);
+    graphb2s1->setYColumn(columnYbar2s1);
+    graphb2s1->setTitle(QObject::tr("3^{rd} barchart"));
+    plots[3]->addGraph(graphb2s1);
+    graphb2s1->stackUpon(graphb2);
+
+    JKQTPBarVerticalStackableGraph* graphb2s2=new JKQTPBarVerticalStackableGraph(plots[3]);
+    graphb2s2->setXColumn(columnXbar);
+    graphb2s2->setYColumn(columnYbar2s2);
+    graphb2s2->setTitle(QObject::tr("4^{th} barchart"));
+    plots[3]->addGraph(graphb2s2);
+    graphb2s2->stackUpon(graphb2s1);
+
     JKQTPBarVerticalGraph* graphb3=new JKQTPBarVerticalGraph(plots[3]);
     graphb3->setXColumn(columnXbar);
     graphb3->setYColumn(columnYbar3);
-    graphb3->setTitle(QObject::tr("3^{nd} barchart"));
+    graphb3->setTitle(QObject::tr("5^{th} barchart"));
     plots[3]->addGraph(graphb3);
     graphb3->autoscaleBarWidthAndShiftSeparatedGroups();
+    plots[3]->getMainKey()->setPosition(JKQTPKeyInsideTopLeft);
 
 
     JKQTPBoxplotVerticalGraph* graphBP=new JKQTPBoxplotVerticalGraph(plots[plots.size()/2]);
@@ -225,6 +259,26 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     graphBP->setMaxColumn(columnMaxBP);
     plots[plots.size()/2]->addGraph(graphBP);
 
+
+    JKQTPFinancialGraph* graphF1=new JKQTPFinancialGraph(plots[plots.size()/2+1]);
+    graphF1->setXColumn(columnFinT);
+    graphF1->setOpenColumn(ds->addCopiedColumn(OFin1, "OFin1"));
+    graphF1->setHighColumn(ds->addCopiedColumn(HFin1, "HFin1"));
+    graphF1->setLowColumn(ds->addCopiedColumn(LFin1, "LFin1"));
+    graphF1->setCloseColumn(ds->addCopiedColumn(CFin1, "CFin1"));
+    graphF1->setGraphType(JKQTPFinancialGraph::OHLC);
+    graphF1->setTitle("OHLC");
+    plots[plots.size()/2+1]->addGraph(graphF1);
+    JKQTPFinancialGraph* graphF2=new JKQTPFinancialGraph(plots[plots.size()/2+1]);
+    graphF2->setXColumn(columnFinT);
+    graphF2->setOpenColumn(ds->addCopiedColumn(OFin2, "OFin2"));
+    graphF2->setHighColumn(ds->addCopiedColumn(HFin2, "HFin2"));
+    graphF2->setLowColumn(ds->addCopiedColumn(LFin2, "LFin2"));
+    graphF2->setCloseColumn(ds->addCopiedColumn(CFin2, "CFin2"));
+    graphF2->setGraphType(JKQTPFinancialGraph::CandleStick);
+    graphF2->setTitle("CandleStick");
+    plots[plots.size()/2+1]->addGraph(graphF2);
+
     auto plotgeo=*(plots.rbegin()+1);
     JKQTPGeoSymbol* annotSym=new JKQTPGeoSymbol(plotgeo, -1.5, 3);
     plotgeo->addGraph(annotSym);
@@ -253,6 +307,8 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     plotgeo->setMaintainAxisAspectRatio(true);
     plotgeo->getXAxis()->setRange(-2.5,4);
     plotgeo->getYAxis()->setRange(-2.5,4);
+    plots[plots.size()/2+1]->getXAxis()->setAxisLabel("time");
+    plots[plots.size()/2+1]->getYAxis()->setAxisLabel("price [\\euro]");
 
 
     plots[0]->setPlotLabel("Line Graphs");
@@ -260,6 +316,7 @@ inline void buildPlots(QVector<JKQTBasePlotter*>& plots) {
     plots[2]->setPlotLabel("Filled Graphs");
     plots[3]->setPlotLabel("Bar Charts");
     plots[plots.size()/2]->setPlotLabel("Boxplots");
+    plots[plots.size()/2+1]->setPlotLabel("Financial Graphs");
     plotgeo->setPlotLabel("Geometry & Annotations");
     plots.last()->setPlotLabel("Image Plot");
 

lib/jkqtcommon/jkqtpbasicimagetools.cpp

@@ -68,9 +68,9 @@ QMap<int, JKQTPImageTools::LUTData > JKQTPImageTools::getDefaultLUTs() {
         lst<<jkqtp_qRgbOpaque(0xBB0000);
         lst<<jkqtp_qRgbOpaque(0x00C11D);
         lst<<jkqtp_qRgbOpaque(0x0039D6);
-        lst<<jkqtp_qRgbOpaque(0xFFDD00);
-        lst<<jkqtp_qRgbOpaque(0xC05FFF);
         lst<<jkqtp_qRgbOpaque(0xDE7704);
+        lst<<jkqtp_qRgbOpaque(0xC05FFF);
+        lst<<jkqtp_qRgbOpaque(0xFFDD00);
         lst<<jkqtp_qRgbOpaque(0x03039A);
 
 

lib/jkqtplotter/graphs/jkqtpbarchart.cpp

@@ -25,6 +25,7 @@
 #include <QDebug>
 #include <iostream>
 #include "jkqtplotter/jkqtptools.h"
+#include "jkqtcommon/jkqtpstringtools.h"
 #include "jkqtplotter/jkqtplotter.h"
 
 #define SmallestGreaterZeroCompare_xvsgz() if ((xvsgz>10.0*DBL_MIN)&&((smallestGreaterZero<10.0*DBL_MIN) || (xvsgz<smallestGreaterZero))) smallestGreaterZero=xvsgz;
@@ -58,6 +59,8 @@ void JKQTPBarVerticalGraph::draw(JKQTPEnhancedPainter& painter) {
 
     const QPen p=getLinePenForRects(painter, parent);
     const auto fillFunctor=std::bind(constructFillBrushFunctor(), std::placeholders::_1, std::placeholders::_2, std::ref(painter), this);
+    const double stackSep=parent->pt2px(painter, getStackSeparation());
+    const double lw=parent->pt2px(painter, getLineWidth());
 
     int imax=0;
     int imin=0;
@@ -88,7 +91,7 @@ void JKQTPBarVerticalGraph::draw(JKQTPEnhancedPainter& painter) {
             if (hasStackPar) {
                 double stackLastY=getParentStackedMax(i);
                 const double yvold=yv;
-                yv0=transformY(stackLastY)-(getLineWidth());
+                yv0=transformY(stackLastY)-stackSep;
                 yv=stackLastY+yvold;
             }
             if (sr<0 && lr<0) { // only one x-value
@@ -239,6 +242,9 @@ void JKQTPBarHorizontalGraph::draw(JKQTPEnhancedPainter& painter) {
 
     const QPen p=getLinePenForRects(painter, parent);
     const auto fillFunctor=std::bind(constructFillBrushFunctor(), std::placeholders::_1, std::placeholders::_2, std::ref(painter), this);
+    const double stackSep=parent->pt2px(painter, getStackSeparation());
+    const double lw=parent->pt2px(painter, getLineWidth());
+
 
     int imax=0;
     int imin=0;
@@ -270,7 +276,7 @@ void JKQTPBarHorizontalGraph::draw(JKQTPEnhancedPainter& painter) {
                 if (hasStackPar) {
                     double stackLastX=getParentStackedMax(i);
                     const double xvold=xv;
-                    xv0=transformX(stackLastX)+(getLineWidth());
+                    xv0=transformX(stackLastX)+stackSep;
                     xv=stackLastX+xvold;
                 }
 
@@ -600,6 +606,13 @@ double JKQTPBarVerticalStackableGraph::getStackedMax(int index) const
     }
 }
 
+
+JKQTPBarGraphBase *JKQTPBarVerticalStackableGraph::getBottomOfStack()
+{
+    if (stackParent) return stackParent->getBottomOfStack();
+    else return this;
+}
+
 JKQTPBarHorizontalStackableGraph::JKQTPBarHorizontalStackableGraph(JKQTBasePlotter *parent):
     JKQTPBarHorizontalGraph(parent), stackParent(nullptr)
 {
@@ -647,6 +660,13 @@ double JKQTPBarHorizontalStackableGraph::getStackedMax(int index) const
     }
 }
 
+JKQTPBarGraphBase *JKQTPBarHorizontalStackableGraph::getBottomOfStack()
+{
+    if (stackParent) return stackParent->getBottomOfStack();
+    else return this;
+
+}
+
 double JKQTPBarHorizontalStackableGraph::getParentStackedMax(int index) const
 {
     if (stackParent) {

lib/jkqtplotter/graphs/jkqtpbarchart.h

@@ -265,7 +265,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalErrorGraph: public JKQTPBarHorizo
  *
  * \see JKQTPBarVerticalGraph, \ref JKQTPlotterStackedBarChart
  */
-class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalStackableGraph: public JKQTPBarVerticalGraph {
+class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalStackableGraph: public JKQTPBarVerticalGraph, public JKQTPBarGraphStackInternalInterface {
         Q_OBJECT
     public:
         /** \brief class constructor */
@@ -293,10 +293,13 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalStackableGraph: public JKQTPBarVert
         double getParentStackedMax(int index) const ;
 
 
-        /** \brief returns \c true, if a stack parent is set (if available) */
-        bool hasStackParent() const ;
+        /** \copydoc JKQTPBarGraphBase::hasStackParent() */
+        virtual bool hasStackParent() const override;
         /** \brief used to generate stacked plots: returns the upper boundary of this plot in a stack, for the index-th datapoint */
         double getStackedMax(int index) const;
+        /** \copydoc JKQTPBarGraphStackInternalInterface::getBottomOfStack() */
+        virtual JKQTPBarGraphBase* getBottomOfStack()  override;
+
 };
 
 
@@ -315,7 +318,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalStackableGraph: public JKQTPBarVert
  *
  * \see JKQTPBarHorizontalGraph, \ref JKQTPlotterStackedBarChart
  */
-class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalStackableGraph: public JKQTPBarHorizontalGraph {
+class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalStackableGraph: public JKQTPBarHorizontalGraph, public JKQTPBarGraphStackInternalInterface {
         Q_OBJECT
     public:
         /** \brief class constructor */
@@ -342,10 +345,12 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalStackableGraph: public JKQTPBarHo
         /** \brief used to generate stacked plots: returns the upper boundary of the parent plot in a stack, for the index-th datapoint */
         virtual double getParentStackedMax(int index) const override;
 
-        /** \brief returns \c true, if a stack parent is set (if available) */
+        /** \copydoc JKQTPBarGraphBase::hasStackParent() */
         virtual bool hasStackParent() const override;
         /** \brief used to generate stacked plots: returns the upper boundary of this plot in a stack, for the index-th datapoint */
         double getStackedMax(int index) const;
+        /** \copydoc JKQTPBarGraphStackInternalInterface::getBottomOfStack() */
+        virtual JKQTPBarGraphBase* getBottomOfStack()  override;
 };
 
 

lib/jkqtplotter/graphs/jkqtpbarchartbase.cpp

@@ -40,7 +40,8 @@ JKQTPBarGraphBase::JKQTPBarGraphBase(JKQTBasePlotter* parent):
     shift(0),
     rectRadiusAtValue(0),
     rectRadiusAtBaseline(0),
-    m_drawBaseline(parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.drawBaseline),
+    m_drawBaseline(false),
+    m_stackSeparation(1),
     m_fillMode(FillMode::SingleFilling),
     m_lineColorDerivationModeForSpecialFill(parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.graphColorDerivationMode),
     m_useCustomDrawFunctor(false)
@@ -48,11 +49,15 @@ JKQTPBarGraphBase::JKQTPBarGraphBase(JKQTBasePlotter* parent):
     initFillStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Barchart);
     initLineStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Barchart);
     m_fillStyleBelow.initFillStyleInvertedColor(this);
-    m_baselineStyle.setLineColor(parent->getCurrentPlotterStyle().xAxisStyle.colorZeroAxis);
     m_baselineStyle.setLineStyle(Qt::SolidLine);
-    m_baselineStyle.setLineWidth(parent->getCurrentPlotterStyle().xAxisStyle.lineWidthZeroAxis);
-    rectRadiusAtBaseline= parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.defaultRectRadiusAtBaseline;
-    rectRadiusAtValue= parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.defaultRectRadiusAtValue;
+    if (parent) {
+        m_baselineStyle.setLineColor(parent->getCurrentPlotterStyle().xAxisStyle.colorZeroAxis);
+        m_baselineStyle.setLineWidth(parent->getCurrentPlotterStyle().xAxisStyle.lineWidthZeroAxis);
+        rectRadiusAtBaseline= parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.defaultRectRadiusAtBaseline;
+        rectRadiusAtValue= parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.defaultRectRadiusAtValue;
+        m_drawBaseline=parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.drawBaseline;
+        m_stackSeparation=parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.stackSeparation;
+    }
 }
 
 
@@ -86,11 +91,18 @@ QColor JKQTPBarGraphBase::getKeyLabelColor() const {
 void JKQTPBarGraphBase::autoscaleBarWidthAndShift(double maxWidth, double shrinkFactor)
 {
     if (parent) {
+        auto isStackBase=[](JKQTPBarGraphBase* other) {
+            const auto vg=dynamic_cast<JKQTPBarGraphStackInternalInterface*>(other);
+            return (vg && !other->hasStackParent());
+        };
+        auto isStackable=[](JKQTPBarGraphBase* other) {
+            return dynamic_cast<JKQTPBarGraphStackInternalInterface*>(other);
+        };
         double cntH=0;
         for (size_t i=0; i<parent->getGraphCount(); i++) {
             JKQTPPlotElement* g=parent->getGraph(i);
             JKQTPBarGraphBase* gb=qobject_cast<JKQTPBarGraphBase*>(g);
-            if (gb && considerForAutoscaling(gb)) {
+            if (gb && considerForAutoscaling(gb) && (isStackBase(gb) || !isStackable(gb))) {
                 cntH++;
             }
 
@@ -102,23 +114,37 @@ void JKQTPBarGraphBase::autoscaleBarWidthAndShift(double maxWidth, double shrink
         for (size_t i=0; i<parent->getGraphCount(); i++) {
             JKQTPPlotElement* g=parent->getGraph(i);
             JKQTPBarGraphBase* gb=qobject_cast<JKQTPBarGraphBase*>(g);
-            if (gb && considerForAutoscaling(gb)) {
+            if (gb && considerForAutoscaling(gb) && (isStackBase(gb) || !isStackable(gb))) {
                 if (cntH>1) {
                     gb->width=widthH;
                     gb->shift=h-0.5;
                     h=h+dH;
                 } else {
+
                     gb->width=maxWidth;
                     gb->shift=0.0;
                 }
             }
 
         }
+        for (size_t i=0; i<parent->getGraphCount(); i++) {
+            JKQTPPlotElement* g=parent->getGraph(i);
+            JKQTPBarGraphStackInternalInterface* gbo=dynamic_cast<JKQTPBarGraphStackInternalInterface*>(g);
+            JKQTPBarGraphBase* gb=qobject_cast<JKQTPBarGraphBase*>(g);
+            if (gbo && gb) {
+                auto stackBottom=gbo->getBottomOfStack();
+                if (g!=stackBottom && stackBottom) {
+                    gb->width=stackBottom->width;
+                    gb->shift=stackBottom->shift;
+                }
+            }
+
+        }
     }
 }
 
 void JKQTPBarGraphBase::autoscaleBarWidthAndShiftSeparatedGroups(double groupWidth) {
-    autoscaleBarWidthAndShift(groupWidth, 1);
+    autoscaleBarWidthAndShift(groupWidth);
 }
 
 
@@ -184,11 +210,21 @@ void JKQTPBarGraphBase::setDrawBaseline(bool __value)
     m_drawBaseline=__value;
 }
 
+void JKQTPBarGraphBase::setStackSeparation(double __value)
+{
+    m_stackSeparation=__value;
+}
+
 bool JKQTPBarGraphBase::getDrawBaseline() const
 {
     return this->m_drawBaseline;
 }
 
+double JKQTPBarGraphBase::getStackSeparation() const
+{
+    return m_stackSeparation;
+}
+
 JKQTPGraphLineStyleMixin &JKQTPBarGraphBase::baselineStyle()
 {
     return m_baselineStyle;

lib/jkqtplotter/graphs/jkqtpbarchartbase.h

@@ -223,6 +223,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
         bool usesCustomDrawFunctor() const;
         /** \copydoc m_drawBaseline */
         bool getDrawBaseline() const;
+        /** \copydoc m_stackSeparation */
+        double getStackSeparation() const;
         /** \copydoc m_baselineStyle */
         JKQTPGraphLineStyleMixin &baselineStyle();
         /** \copydoc m_baselineStyle */
@@ -255,10 +257,31 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
          *  \param shrinkFactor factor, by which the bar are shrinked compared to the available space
          *
          *  \note This function will scale ALL graphs of the parent plot, which were derived from JKQTPBarHorizontalGraph, that match in orientation (as returned by isHorizontal() ).
+         *
+         *  Using \c autoscaleBarWidthAndSHift(0.75,1.0) You can separate the different groups by soe distance, but the bars touch each other:
+         *
+         *  \image html JKQTPBarVerticalAutoscaleMaxWidthOnly.png
+         *
+         *  On the other hand, using the other extreme \c autoscaleBarWidthAndSHift(1.0,0.9) there is no grouping of the bars, but they have a slight distance between each other.
+         *
+         *  \image html JKQTPBarVerticalAutoscaleShrinkOnly.png
+         *
+         *  Finally the default parameters \c autoscaleBarWidthAndSHift(0.75,0.9) will lead to a separation of the bars AND a grouping:
+         *
+         *  \image html JKQTPBarVerticalGraph.png
+         *
          */
-        virtual void autoscaleBarWidthAndShift(double maxWidth=0.9, double shrinkFactor=0.8);
+        virtual void autoscaleBarWidthAndShift(double maxWidth=0.75, double shrinkFactor=0.9);
 
-        /** \brief equivalent to \c autoscaleBarWidthAndShift(groupWidth,1);
+        /** \brief equivalent to \c autoscaleBarWidthAndShift(groupWidth,0.9);
+         *
+         *  The default parameters \c autoscaleBarWidthAndShiftSeparatedGroups(0.75) will lead to a separation of the bars AND a grouping:
+         *
+         *  \image html JKQTPBarVerticalGraph.png
+         *
+         *  On the other hand, using \c autoscaleBarWidthAndShiftSeparatedGroups(1.0) there is no grouping of the bars, but they have a slight distance between each other.
+         *
+         *  \image html JKQTPBarVerticalAutoscaleShrinkOnly.png
          */
         void autoscaleBarWidthAndShiftSeparatedGroups(double groupWidth=0.75);
         /** \copydoc shift */
@@ -268,6 +291,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
         /** \copydoc m_drawBaseline */
         void setDrawBaseline(bool __value);
 
+        /** \copydoc m_stackSeparation */
+        void setStackSeparation(double __value);
         /** \copydoc rectRadiusAtValue */
         void setRectRadiusAtValue(double __value);
         /** \copydoc rectRadiusAtBaseline */
@@ -302,13 +327,19 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
         /** \brief the width of the bargraphs, relative to the distance between the current and the next x-value
          *
          * See the following graphic to understand this concept:
-         *     \image html bargraph_basics.png
+         *     \image html bargraph_basics_width.png
+         *
+         * \note this parameter can be combined with shift !
+         *
+         * \see setWidth(), getWidth(), setShift(), getShift(), shift, autoscaleBarWidthAndShift(), autoscaleBarWidthAndShiftSeparatedGroups()
          */
         double width;
         /** \brief the shift of the bargraphs, relative to the distance between the current and the next x-value
          *
          * See the following graphic to understand this concept:
          *     \image html bargraph_basics.png
+         *
+         * \see setShift(), getShift(), setWidth(), getWidth(), autoscaleBarWidthAndShift(), autoscaleBarWidthAndShiftSeparatedGroups()
          */
         double shift;
         /** \brief corner radius (in pt) for bars at the "value" end */
@@ -329,6 +360,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
          *  \see baselineStyle() , setDrawBaseline() , m_baselineStyle
          */
         bool m_drawBaseline;
+        /** \brief separation (in pt) between two bars in a stack of bars */
+        double m_stackSeparation;
         /** \brief specifies how the area of the graph is filles
          *
          *  \note If any fill style other than FillStyle::SingleFill is used, the peroperty m_lineColorDerivationModeForSpecialFill
@@ -411,7 +444,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
         virtual FillBrushFunctor constructFillBrushFunctor() const;
 
         /** \brief this function is used by autoscaleBarWidthAndShift() to determine whether a given graph shall be taken into account when autoscaling. 
-		 *         Typically this returns \c true for all JKQTPBarGraphBase-derved objects with the same orientation (horizontal or vertical) */
+         *         Typically this returns \c true for all JKQTPBarGraphBase-derived objects with the same orientation (horizontal or vertical). For stacked
+         *         graphs it excludes everything except the bottom of the stack
+         */
         virtual bool considerForAutoscaling( JKQTPBarGraphBase* other) const=0;
 
         /** \brief used to generate stacked plots: returns the upper boundary of the parent plot in a stack, for the index-th datapoint */
@@ -434,7 +469,23 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, pub
 
 
 
+/** \brief This is an interface-class for all stackable bargraphs ... it is used internally for autoscaling only
+ *  \ingroup jkqtplotter_barcharts
+ *
+ *  \c dynamic_cast 'ing to this indicates that a barchart is stackable.
+ *
+ *
+ */
+class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphStackInternalInterface {
+public:
+    inline virtual ~JKQTPBarGraphStackInternalInterface() {};
+protected:
 
+    /** \brief returns the barchart at the bottom of this stack (i.e. traverses the stack until there are no more parents */
+    virtual JKQTPBarGraphBase* getBottomOfStack()=0;
+
+    friend class JKQTPBarGraphBase;
+};
 
 
 

lib/jkqtplotter/graphs/jkqtpfinancial.cpp

@@ -31,7 +31,11 @@
 
 
 
+QSet<JKQTBasePlotter*> JKQTPFinancialGraph::parentsAlreadySeen={};
 
+void JKQTPFinancialGraph::clearColorAssignStore() {
+    parentsAlreadySeen.clear();
+}
 
 
 JKQTPFinancialGraph::JKQTPFinancialGraph(JKQTBasePlotter* parent):
@@ -45,24 +49,31 @@ JKQTPFinancialGraph::JKQTPFinancialGraph(JKQTBasePlotter* parent):
     shift(0)
 
 {
-    m_fillStylePositive.initFillStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Boxplot);
-    m_fillStyleNegative.initFillStyleInvertedColor(&m_fillStylePositive);
+    //qDebug()<<"1: pos: "<<m_lineStylePositive.getLineColor()<<", fill: "<<m_fillStylePositive.getFillColor();
+    //qDebug()<<"1: neg: "<<m_lineStyleNegative.getLineColor()<<", fill: "<<m_fillStyleNegative.getFillColor();
+    m_fillStylePositive.initFillStyle(parent, parentPlotStyle, JKQTPPlotStyleType::FinancialPositive);
+    m_fillStyleNegative.initFillStyle(parent, parentPlotStyle, JKQTPPlotStyleType::FinancialNegative);
 
-    m_lineStylePositive.initLineStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Boxplot);
-    m_lineStyleNegative.initLineStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Boxplot);
-    m_lineStyleNegative.setLineColor(m_fillStyleNegative.getFillColor());
+    m_lineStylePositive.initLineStyle(parent, parentPlotStyle, JKQTPPlotStyleType::FinancialPositive);
+    m_lineStyleNegative.initLineStyle(parent, parentPlotStyle, JKQTPPlotStyleType::FinancialNegative);
+    //qDebug()<<"2: pos: "<<m_lineStylePositive.getLineColor()<<", fill: "<<m_fillStylePositive.getFillColor();
+    //qDebug()<<"2: neg: "<<m_lineStyleNegative.getLineColor()<<", fill: "<<m_fillStyleNegative.getFillColor();
 
-    static QSet<JKQTBasePlotter*> parentsAlreadySeen;
-    if (!parentsAlreadySeen.contains(parent)) {
+
+
+    if (parent && !parentsAlreadySeen.contains(parent)) {
         // ensure, the first graph in a plot has default red/green colors
         // further plots will have colors
-        m_fillStylePositive.setFillColor(QColor("darkgreen"));
-        m_fillStyleNegative.setFillColor(QColor("maroon"));
-        m_lineStylePositive.setLineColor(QColor("darkgreen"));
-        m_lineStyleNegative.setLineColor(QColor("maroon"));
+        //qDebug()<<"FIRST!"<<parent;
+        m_fillStylePositive.setFillColor(parent->getCurrentPlotterStyle().graphsStyle.financialStyle.positiveDefaultColor);
+        m_fillStyleNegative.setFillColor(parent->getCurrentPlotterStyle().graphsStyle.financialStyle.negativeDefaultColor);
+        m_lineStylePositive.setLineColor(parent->getCurrentPlotterStyle().graphsStyle.financialStyle.positiveDefaultColor);
+        m_lineStyleNegative.setLineColor(parent->getCurrentPlotterStyle().graphsStyle.financialStyle.negativeDefaultColor);
     }
     parentsAlreadySeen.insert(parent);
 
+    //qDebug()<<"3: pos: "<<m_lineStylePositive.getLineColor()<<", fill: "<<m_fillStylePositive.getFillColor();
+    //qDebug()<<"3: neg: "<<m_lineStyleNegative.getLineColor()<<", fill: "<<m_fillStyleNegative.getFillColor();
 }
 
 

lib/jkqtplotter/graphs/jkqtpfinancial.h

@@ -166,6 +166,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPFinancialGraph: public JKQTPXGraph {
         Q_PROPERTY(int lowColumn READ getLowColumn WRITE setLowColumn)
         Q_PROPERTY(FinancialGraphType graphType READ getGraphType WRITE setGraphType)
 
+        static void clearColorAssignStore();
     public Q_SLOTS:
 
         /** \brief finds all financial charts of the same orientation and determines width and shift, so they stand side by side
@@ -260,6 +261,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPFinancialGraph: public JKQTPXGraph {
         void setLowColumn (size_t __value);
 
     protected:
+        static QSet<JKQTBasePlotter*> parentsAlreadySeen;
         /** \brief type of the financial graph (OHLC or candle-stick)
          *
          *  \see setGraphType(), getGraphType(), FinancialGraphType

lib/jkqtplotter/jkqtpgraphsbase.cpp

@@ -1392,7 +1392,7 @@ void JKQTPXGraph::intSortData()
 
 
     if (parent==nullptr)  return ;
-    if (sortData==JKQTPXYLineGraph::Unsorted) return ;
+    if (sortData==JKQTPXGraph::Unsorted) return ;
 
     JKQTPDatastore* datastore=parent->getDatastore();
     int imin=0;

lib/jkqtplotter/jkqtpgraphsbasestyle.cpp

@@ -35,6 +35,14 @@ void JKQTGraphsSpecificStyleProperties::modifyForDefaultStyle(JKQTPPlotStyleType
     switch(type) {
     case JKQTPPlotStyleType::Default:
         break;
+    case JKQTPPlotStyleType::FinancialNegative:
+        defaultLineWidth=1;
+        fillColorDerivationMode=JKQTPColorDerivationMode::JKQTPFFCMSameColor;
+        break;
+    case JKQTPPlotStyleType::FinancialPositive:
+        defaultLineWidth=1;
+        fillColorDerivationMode=JKQTPColorDerivationMode::JKQTPFFCMSameColor;
+        break;
     case JKQTPPlotStyleType::Filled:
         fillColorDerivationMode=JKQTPColorDerivationMode::JKQTPFFCMLighterAndTransparentColor;
         break;
@@ -95,6 +103,7 @@ void JKQTGraphsSpecificStyleProperties::saveSettings(QSettings &settings, const
     settings.setValue(group+"error_color_mode", JKQTPColorDerivationMode2String(errorColorDerivationMode));
     settings.setValue(group+"error_fill_color_mode", JKQTPColorDerivationMode2String(errorFillColorDerivationMode));
     settings.setValue(group+"symbol_fill_color_mode", JKQTPColorDerivationMode2String(symbolFillColorDerivationMode));
+
 }
 
 
@@ -204,6 +213,7 @@ JKQTGraphsBaseStyle::JKQTGraphsBaseStyle(const JKQTBasePlotterStyle& parent):
     impulseStyle(parent),
     geometricStyle(parent),
     annotationStyle(parent),
+    financialStyle(parent),
     defaultPalette(JKQTPMathImageColorPalette::JKQTPMathImageMATLAB),
     defaultGraphColors(getDefaultGraphColors()),
     defaultGraphPenStyles(getDefaultGraphPenStyles()),
@@ -334,6 +344,7 @@ void JKQTGraphsBaseStyle::loadSettings(const QSettings &settings, const QString
     impulseStyle.loadSettings(settings, group+"graphs_impulses/", JKQTImpulseSpecificStyleProperties(parent,  defaultGraphStyle));
     geometricStyle.loadSettings(settings, group+"graphs_geometric/", JKQTGeometricSpecificStyleProperties(parent, defaultGraphStyle));
     annotationStyle.loadSettings(settings, group+"graphs_annotation/", JKQTAnnotationsSpecificStyleProperties(parent, defaultGraphStyle));
+    financialStyle.loadSettings(settings, group+"graphs_financial/", JKQTFinancialSpecificStyleProperties(parent, defaultGraphStyle));
 
 }
 
@@ -410,6 +421,7 @@ void JKQTGraphsBaseStyle::saveSettings(QSettings &settings, const QString &group
     impulseStyle.saveSettings(settings, group+"graphs_impulses/");
     geometricStyle.saveSettings(settings, group+"graphs_geometric/");
     annotationStyle.saveSettings(settings, group+"graphs_annotation/");
+    financialStyle.saveSettings(settings, group+"graphs_financial/");
 }
 
 const JKQTGraphsSpecificStyleProperties &JKQTGraphsBaseStyle::getGraphStyleByType(JKQTPPlotStyleType type) const
@@ -429,6 +441,9 @@ const JKQTGraphsSpecificStyleProperties &JKQTGraphsBaseStyle::getGraphStyleByTyp
         return geometricStyle;
     case JKQTPPlotStyleType::Annotation:
         return annotationStyle;
+    case JKQTPPlotStyleType::FinancialNegative:
+    case JKQTPPlotStyleType::FinancialPositive:
+        return financialStyle;
     }
     return defaultGraphStyle;
 }
@@ -439,7 +454,8 @@ JKQTBarchartSpecificStyleProperties::JKQTBarchartSpecificStyleProperties(const J
     JKQTGraphsSpecificStyleProperties(JKQTPPlotStyleType::Barchart, parent),
     defaultRectRadiusAtValue(0),
     defaultRectRadiusAtBaseline(0),
-    drawBaseline(false)
+    drawBaseline(false),
+    stackSeparation(1)
 {
 
 }
@@ -448,7 +464,8 @@ JKQTBarchartSpecificStyleProperties::JKQTBarchartSpecificStyleProperties(const J
     JKQTGraphsSpecificStyleProperties(JKQTPPlotStyleType::Barchart, other),
     defaultRectRadiusAtValue(0),
     defaultRectRadiusAtBaseline(0),
-    drawBaseline(false)
+    drawBaseline(false),
+    stackSeparation(1)
 {
 
 }
@@ -459,6 +476,7 @@ void JKQTBarchartSpecificStyleProperties::loadSettings(const QSettings &settings
     defaultRectRadiusAtValue=settings.value(group+"radius_at_value", defaultStyle.defaultRectRadiusAtValue).toDouble();
     defaultRectRadiusAtBaseline=settings.value(group+"radius_at_baseline", defaultStyle.defaultRectRadiusAtBaseline).toDouble();
     drawBaseline=settings.value(group+"draw_baseline", defaultStyle.drawBaseline).toBool();
+    stackSeparation=settings.value(group+"stack_separation", defaultStyle.stackSeparation).toDouble();
 }
 
 void JKQTBarchartSpecificStyleProperties::saveSettings(QSettings &settings, const QString &group) const
@@ -467,7 +485,7 @@ void JKQTBarchartSpecificStyleProperties::saveSettings(QSettings &settings, cons
     settings.setValue(group+"radius_at_value", defaultRectRadiusAtValue);
     settings.setValue(group+"radius_at_baseline", defaultRectRadiusAtBaseline);
     settings.setValue(group+"draw_baseline", drawBaseline);
-
+    settings.setValue(group+"stack_separation", stackSeparation);
 }
 
 
@@ -499,6 +517,48 @@ void JKQTImpulseSpecificStyleProperties::saveSettings(QSettings &settings, const
 }
 
 
+JKQTFinancialSpecificStyleProperties::JKQTFinancialSpecificStyleProperties(const JKQTBasePlotterStyle &parent):
+    JKQTGraphsSpecificStyleProperties(JKQTPPlotStyleType::Default, parent),
+    positiveDefaultColor("darkgreen"),
+    negativeDefaultColor("maroon"),
+    negativeGraphColorDerivationMode(JKQTPColorDerivationMode::JKQTPFFCMInvertedColor),
+    positiveFillStyle(Qt::SolidPattern),
+    negativeFillStyle(Qt::SolidPattern)
+{
+    defaultLineWidth=1;
+}
+
+JKQTFinancialSpecificStyleProperties::JKQTFinancialSpecificStyleProperties(const JKQTBasePlotterStyle &parent, const JKQTGraphsSpecificStyleProperties &other):
+    JKQTGraphsSpecificStyleProperties(JKQTPPlotStyleType::Default, parent),
+    positiveDefaultColor("darkgreen"),
+    negativeDefaultColor("maroon"),
+    negativeGraphColorDerivationMode(JKQTPColorDerivationMode::JKQTPFFCMInvertedColor),
+    positiveFillStyle(Qt::SolidPattern),
+    negativeFillStyle(Qt::SolidPattern)
+{
+    defaultLineWidth=1;
+}
+
+void JKQTFinancialSpecificStyleProperties::loadSettings(const QSettings &settings, const QString &group, const JKQTFinancialSpecificStyleProperties &defaultStyle)
+{
+    JKQTGraphsSpecificStyleProperties::loadSettings(settings, group, defaultStyle);
+    positiveDefaultColor=jkqtp_String2QColor(settings.value(group+"default_positive_color", jkqtp_QColor2String(positiveDefaultColor)).toString());
+    negativeDefaultColor=jkqtp_String2QColor(settings.value(group+"default_negative_color", jkqtp_QColor2String(negativeDefaultColor)).toString());
+    positiveFillStyle=JKQTFillStyleSummmary::fromString(settings.value(group+"positive_fill_style", positiveFillStyle.toCSSString()).toString());
+    negativeFillStyle=JKQTFillStyleSummmary::fromString(settings.value(group+"negative_fill_style", negativeFillStyle.toCSSString()).toString());
+    negativeGraphColorDerivationMode=String2JKQTPColorDerivationMode(settings.value(group+"negative_graph_color_mode", JKQTPColorDerivationMode2String(defaultStyle.negativeGraphColorDerivationMode)).toString());
+}
+
+void JKQTFinancialSpecificStyleProperties::saveSettings(QSettings &settings, const QString &group) const
+{
+    JKQTGraphsSpecificStyleProperties::saveSettings(settings, group);
+    settings.setValue(group+"default_positive_color", jkqtp_QColor2String(positiveDefaultColor));
+    settings.setValue(group+"default_negative_color", jkqtp_QColor2String(negativeDefaultColor));
+    settings.setValue(group+"positive_fill_style", positiveFillStyle.toCSSString());
+    settings.setValue(group+"negative_fill_style", negativeFillStyle.toCSSString());
+    settings.setValue(group+"negative_graph_color_mode", JKQTPColorDerivationMode2String(negativeGraphColorDerivationMode));
+}
+
 
 JKQTFillStyleSummmary::JKQTFillStyleSummmary(Qt::BrushStyle style, const QGradient& grad):
     brushStyle(style), gradient(grad)
@@ -532,3 +592,4 @@ QString JKQTFillStyleSummmary::toCSSString() const
 {
     return jkqtp_QBrushStyle2String(brushStyle);
 }
+

lib/jkqtplotter/jkqtpgraphsbasestyle.h

@@ -273,6 +273,8 @@ public:
     double defaultRectRadiusAtBaseline;
     /** \brief indicates whether to draw a baseline (style is derived from axis style) */
     bool drawBaseline;
+    /** \brief separation between consecutive pars in a stack of bars [in pt] */
+    double stackSeparation;
 
 
 };
@@ -286,7 +288,7 @@ public:
 */
 class JKQTPLOTTER_LIB_EXPORT JKQTImpulseSpecificStyleProperties: public JKQTGraphsSpecificStyleProperties {
 #ifndef JKQTPLOTTER_WORKAROUND_QGADGET_BUG
-     Q_GADGET
+    Q_GADGET
 #endif
 public:
     explicit JKQTImpulseSpecificStyleProperties(const JKQTBasePlotterStyle& parent);
@@ -321,6 +323,61 @@ public:
 
 
 
+/** \brief Support Class for JKQTBasePlotter, which summarizes all properties that define the visual styling of impulse/stick graph elements
+*  \ingroup jkqtpplotter_styling_classes
+*
+*  \see JKQTBasePlotter, \ref jkqtpplotter_styling
+*/
+class JKQTPLOTTER_LIB_EXPORT JKQTFinancialSpecificStyleProperties: public JKQTGraphsSpecificStyleProperties {
+#ifndef JKQTPLOTTER_WORKAROUND_QGADGET_BUG
+    Q_GADGET
+#endif
+public:
+    explicit JKQTFinancialSpecificStyleProperties(const JKQTBasePlotterStyle& parent);
+    JKQTFinancialSpecificStyleProperties(const JKQTBasePlotterStyle& parent, const JKQTGraphsSpecificStyleProperties& other);
+    JKQTFinancialSpecificStyleProperties(const JKQTFinancialSpecificStyleProperties& other)=default;
+    JKQTFinancialSpecificStyleProperties(JKQTFinancialSpecificStyleProperties&& other)=default;
+    JKQTFinancialSpecificStyleProperties& operator=(const JKQTFinancialSpecificStyleProperties& other)=default;
+    JKQTFinancialSpecificStyleProperties& operator=(JKQTFinancialSpecificStyleProperties&& other)=default;
+
+
+    /** \brief loads the plot properties from a <a href="http://doc.qt.io/qt-5/qsettings.html")">QSettings</a> object
+        *
+        *  \param settings QSettings-object to read from
+        *  \param group Group in the QSettings-object to read from
+        *  \param defaultStyle If a setting cannot be found in \a settings, default values are taken from this object
+        *                      By default, this is a default-constructed object
+        */
+    void loadSettings(const QSettings &settings, const QString& group, const JKQTFinancialSpecificStyleProperties &defaultStyle);
+
+    /** \brief saves the plot properties into a <a href="http://doc.qt.io/qt-5/qsettings.html")">QSettings</a> object.
+        *
+        *  \param settings QSettings-object to save to
+        *  \param group Group in the QSettings-object to save to
+        */
+    void saveSettings(QSettings& settings, const QString& group) const;
+
+    /** \brief default color to use for the (first) financial graph, positive elements */
+    QColor positiveDefaultColor;
+    /** \brief default color to use for the (first) financial graph, negative elements */
+    QColor negativeDefaultColor;
+    /** \brief defines how to derive the basic graph color for negative elements in a new graph from the color selected from JKQTGraphsBaseStyle::defaultGraphColors
+         *
+         *  This property is usually JKQTPFFCMSameColor, but can be changed to allow to e.g. fill
+         *  barcharts always with a lighter color than the full color ...
+         */
+    JKQTPColorDerivationMode negativeGraphColorDerivationMode;
+    /** \brief graph fill style used for positive element */
+    JKQTFillStyleSummmary positiveFillStyle;
+    /** \brief graph fill style used for negative element */
+    JKQTFillStyleSummmary negativeFillStyle;
+
+
+
+};
+
+
+
 /** \brief Support Class for JKQTBasePlotter, which summarizes all properties that define the visual styling of a JKQTBasePlotter
  *  \ingroup jkqtpplotter_styling_classes
  *
@@ -374,6 +431,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTGraphsBaseStyle {
         JKQTGeometricSpecificStyleProperties geometricStyle;
 		/** \brief styling options for annotation elements */
 		JKQTAnnotationsSpecificStyleProperties annotationStyle;
+        /** \brief styling options for financial elements */
+        JKQTFinancialSpecificStyleProperties financialStyle;
 
         /** \brief returns defaultGraphStyle, barchartStyle, ..., depending on the value of \a type */
         const JKQTGraphsSpecificStyleProperties& getGraphStyleByType(JKQTPPlotStyleType type) const;

lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp

@@ -43,6 +43,22 @@ void JKQTPGraphLineStyleMixin::initLineStyle(JKQTBasePlotter* parent, int &paren
             m_lineWidth=m_linePen.widthF();
             m_highlightingLineColor=getLineColor();
             m_highlightingLineColor.setAlphaF(0.5);
+        } else if (styletype==JKQTPPlotStyleType::FinancialPositive) {
+            if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_linePen.setColor(pen.color());
+            m_linePen.setStyle(Qt::SolidLine);
+            m_lineWidth=pen.widthF();
+            m_highlightingLineColor=getLineColor();
+            m_highlightingLineColor.setAlphaF(0.5);
+        } else if (styletype==JKQTPPlotStyleType::FinancialNegative) {
+            if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_linePen.setColor(JKQTPGetDerivedColor(parent->getCurrentPlotterStyle().graphsStyle.financialStyle.negativeGraphColorDerivationMode, pen.color()));
+            m_linePen.setStyle(Qt::SolidLine);
+            m_lineWidth=pen.widthF();
+            m_highlightingLineColor=getLineColor();
+            m_highlightingLineColor.setAlphaF(0.5);
         } else {
             if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
             const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
@@ -428,6 +444,16 @@ void JKQTPGraphFillStyleMixin::initFillStyle(JKQTBasePlotter *parent, int &paren
         if (styletype==JKQTPPlotStyleType::Annotation) {
             m_fillColor=JKQTPGetDerivedColor(parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.fillColorDerivationMode, parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultColor);
             m_fillBrush=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultFillStyle.brush(m_fillColor);
+        } else if (styletype==JKQTPPlotStyleType::FinancialPositive) {
+            if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_fillColor=pen.color();
+            m_fillBrush=parent->getCurrentPlotterStyle().graphsStyle.financialStyle.positiveFillStyle.brush(m_fillColor);
+        } else if (styletype==JKQTPPlotStyleType::FinancialNegative) {
+            if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_fillColor=JKQTPGetDerivedColor(parent->getCurrentPlotterStyle().graphsStyle.financialStyle.negativeGraphColorDerivationMode, pen.color());
+            m_fillBrush=parent->getCurrentPlotterStyle().graphsStyle.financialStyle.negativeFillStyle.brush(m_fillColor);
         } else {
             if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
             const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);

lib/jkqtplotter/jkqtptools.h

@@ -73,6 +73,8 @@ enum class JKQTPPlotStyleType {
     Impulses, /*!< impulse-type graphs  */
     Geometric, /*!< geometric elements (e.g. rectangles, circles, lines, ...) */
     Annotation, /*!< annotation elements */
+    FinancialPositive, /*!< financial positive elements */
+    FinancialNegative, /*!< financial negative elements */
 };
 
 /** \brief Styles in which to mark single positions during user actions in JKQTPlotter

lib/jkqtplotter/resources/styles/.gitignore

@@ -0,0 +1 @@
+/*.png

lib/jkqtplotter/resources/styles/blackandwhite.ini

@@ -74,3 +74,9 @@ graphs\auto_styles\fill_style3=ver
 graphs\auto_styles\fill_style4=hor
 graphs\auto_styles\fill_style5=cross
 graphs\auto_styles\fill_style6=diagcross
+graphs\graphs_barchart\stack_separation=0
+graphs\graphs_financial\default_positive_color=grey50
+graphs\graphs_financial\default_negative_color=black
+graphs\graphs_financial\positive_fill_style=none
+graphs\graphs_financial\negative_fill_style=solid
+graphs\graphs_financial\negative_graph_color_mode=lighter

lib/jkqtplotter/resources/styles/blueprint.ini

@@ -66,3 +66,5 @@ graphs\auto_styles\color3="#E6EE9C"
 graphs\auto_styles\color4="#FFB74D"
 graphs\auto_styles\color5="#CE93D8"
 graphs\graphs_base\symbol_fill_color_mode=lighter_color(130)
+graphs\graphs_financial\default_positive_color=limegreen
+graphs\graphs_financial\default_negative_color=red

lib/jkqtplotter/resources/styles/cyberpunk.ini

@@ -71,4 +71,6 @@ graphs\graphs_annotation\text_color=white
 graphs\graphs_base\fill_color_mode="same_color,more_transparent(0.5)"
 graphs\graphs_filled\fill_color_mode="same_color,more_transparent(0.33)"
 graphs\graphs_boxplot\fill_color_mode="lighter,more_transparent(0.5)"
-
+graphs\graphs_barchart\stack_separation=0
+graphs\graphs_financial\default_positive_color=limegreen
+graphs\graphs_financial\default_negative_color=red

lib/jkqtplotter/resources/styles/dark.ini

@@ -72,4 +72,5 @@ graphs\graphs_annotation\text_color=white
 graphs\graphs_base\fill_color_mode="same_color,more_transparent(0.5)"
 graphs\graphs_filled\fill_color_mode="same_color,more_transparent(0.33)"
 graphs\graphs_boxplot\fill_color_mode="lighter,more_transparent(0.5)"
-
+graphs\graphs_financial\default_positive_color=limegreen
+graphs\graphs_financial\default_negative_color=red

lib/jkqtplotter/resources/styles/default.ini

@@ -308,6 +308,7 @@ graphs\graphs_barchart\symbol_fill_color_mode=lighter
 graphs\graphs_barchart\radius_at_value=0
 graphs\graphs_barchart\radius_at_baseline=0
 graphs\graphs_barchart\draw_baseline=false
+graphs\graphs_barchart\stack_separation=1
 graphs\graphs_boxplot\linewidth=1
 graphs\graphs_boxplot\symbol_size=10
 graphs\graphs_boxplot\symbol_line_width=1
@@ -380,3 +381,20 @@ graphs\graphs_annotation\fill_style=solid
 graphs\graphs_annotation\text_color=black
 graphs\graphs_annotation\font_size=12
 graphs\graphs_annotation\font_name=GUI+FIRA
+graphs\graphs_financial\linewidth=2
+graphs\graphs_financial\symbol_size=10
+graphs\graphs_financial\symbol_line_width=1
+graphs\graphs_financial\error_indicator_width=1
+graphs\graphs_financial\head_decorator_size_factor=8
+graphs\graphs_financial\head_decorator_type=filled_arrow
+graphs\graphs_financial\error_fill_style=solid
+graphs\graphs_financial\graph_color_mode=same
+graphs\graphs_financial\fill_color_mode=lighter
+graphs\graphs_financial\error_color_mode=darker
+graphs\graphs_financial\error_fill_color_mode=lighter_transparent
+graphs\graphs_financial\symbol_fill_color_mode=lighter
+graphs\graphs_financial\default_positive_color=darkgreen
+graphs\graphs_financial\default_negative_color=maroon
+graphs\graphs_financial\positive_fill_style=solid
+graphs\graphs_financial\negative_fill_style=solid
+graphs\graphs_financial\negative_graph_color_mode=inverted

lib/jkqtplotter/resources/styles/legacy_default_style.ini

@@ -414,3 +414,4 @@ graphs\graphs_annotation\fill_style=solid
 graphs\graphs_annotation\text_color=black
 graphs\graphs_annotation\font_size=12
 graphs\graphs_annotation\font_name=GUI
+graphs\graphs_barchart\stack_separation=0

lib/jkqtplotter/resources/styles/seaborn.ini

@@ -315,7 +315,8 @@ graphs\graphs_base\fill_color_mode=lighter_transparent
 graphs\graphs_base\error_color_mode=same
 graphs\graphs_base\error_fill_color_mode=lighter_transparent
 graphs\graphs_base\symbol_fill_color_mode=same
-graphs\graphs_barchart\linewidth=1
+graphs\graphs_barchart\linewidth=0
+graphs\graphs_barchart\stack_separation=1
 graphs\graphs_barchart\symbol_size=10
 graphs\graphs_barchart\symbol_line_width=1
 graphs\graphs_barchart\error_indicator_width=1
@@ -398,3 +399,5 @@ graphs\graphs_annotation\fill_style=solid
 graphs\graphs_annotation\text_color=black
 graphs\graphs_annotation\font_size=12
 graphs\graphs_annotation\font_name=GUI
+graphs\graphs_financial\default_positive_color=seagreen
+graphs\graphs_financial\default_negative_color=maroon