NEW: JKQTPXYGraphLabels which can draw a label next to each datapoint in the given x/y-dataset. The labels can be x-/y- or x&y-coordinates or custom, then defined by a user-supplied functor (+example \ref JKQTPlotterGraphLabels)

2024-12-25 01:51:49 +08:00 · 2024-02-06 14:49:14 +01:00 · 2024-02-06 14:49:14 +01:00 · 3c9bd56d9e
commit 3c9bd56d9e
parent 0009ff8f64
42 changed files with 1931 additions and 28 deletions
--- a/.gitignore
+++ b/.gitignore
@ -164,3 +164,15 @@ Sicherungskopie_*
 /screenshots/datastore_statistics_dataonly_small.png
 /screenshots/datastore_statistics_hist_small.png
 /screenshots/datastore_statistics_kde_small.png
+/doc/images/JKQTPGLSimpleBoxAndLineVertical_small.png
+/doc/images/JKQTPGLSimpleBoxAndLine_small.png
+/doc/images/JKQTPGLSimpleVertical_small.png
+/doc/images/JKQTPGLSimple_small.png
+/doc/images/JKQTPGLabelAboveData_small.png
+/doc/images/JKQTPGLabelAwayFromXAxis_small.png
+/doc/images/JKQTPGLabelAwayFromYAxis_small.png
+/doc/images/JKQTPGLabelBelowData_small.png
+/doc/images/JKQTPGLabelLeftHandSide_small.png
+/doc/images/JKQTPGLabelRightHandSide_small.png
+/doc/images/JKQTPGLabelTowardsXAxis_small.png
+/doc/images/JKQTPGLabelTowardsYAxis_small.png
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@ -244,6 +244,7 @@ if(JKQtPlotter_BUILD_EXAMPLES)
        datastore_statistics_2d/datastore_statistics_2d
        multithreaded/multithreaded/--mdfile=${CMAKE_CURRENT_LIST_DIR}/../examples/multithreaded/README.md
        #"multithreaded_complex[multithreaded]/multithreaded_complex/--mdfile=${CMAKE_CURRENT_LIST_DIR}/../examples/multithreaded/README.md --complexlabel"
+        graphlabels/graphlabels,graphlabels_hor
    )


@ -271,6 +272,7 @@ if(JKQtPlotter_BUILD_EXAMPLES)
        symbols_and_errors/JKQTPXYLineErrorGraph_JKQTPErrorBars,JKQTPXYLineErrorGraph_JKQTPErrorLines,JKQTPXYLineErrorGraph_JKQTPErrorPolygons/--iteratefunctorsteps--iteratefunctorsteps_suppressinitial--smallscreenshotplot
        boxplot/JKQTPBoxplotVerticalGraph,JKQTPBoxplotHorizontalGraph/--iteratefunctorsteps--iteratefunctorsteps_suppressinitial--smallscreenshotplot
        second_axis/JKQTBasePlotter_addSecondaryYAxis,JKQTBasePlotter_addSecondaryXAxis
+        graphlabels/JKQTPGLabelAwayFromXAxis,JKQTPGLabelAwayFromYAxis,JKQTPGLabelTowardsXAxis,JKQTPGLabelTowardsYAxis,JKQTPGLabelAboveData,JKQTPGLabelRightHandSide,JKQTPGLabelBelowData,JKQTPGLabelLeftHandSide,JKQTPGLSimple,JKQTPGLSimpleVertical,JKQTPGLSimpleBoxAndLine,JKQTPGLSimpleBoxAndLineVertical,JKQTPGLSimpleBoxAndLineONLYLABELS,JKQTPGLSimpleBoxAndLineONLYLABELSVertical/--iteratefunctorsteps--smallscreenshotplot
    )


--- a/doc/dox/examples_and_tutorials.dox
+++ b/doc/dox/examples_and_tutorials.dox
@ -113,6 +113,9 @@ All test-projects are Qt-projects that use qmake to build. You can load them int
 <tr><td> \image html geo_coordinateaxis0_small.png
    <td> \subpage JKQTPlotterGeometricCoordinateAxis0
    <td> `JKQTPCoordinateAxisStyle::drawMode0`, `JKQTPGeoPolygon`, `JKQTPGeoEllipse`
+<tr><td> \image html JKQTPGLSimpleBoxAndLineONLYLABELS_small.png
+    <td> \subpage JKQTPXYGraphLabels
+    <td> `JKQTPXYGraphLabels`
 </table>

 \subsection jkqtp_extut_keyaxesstyles  Examples for Styling the Plot, Keys, Axes, ...
--- a/doc/dox/jkqtplotter_plotelements_classdoc.dox
+++ b/doc/dox/jkqtplotter_plotelements_classdoc.dox
@ -29,7 +29,10 @@ These classes are used by JKQTPlotterBase to output the plot.
 \defgroup jkqtplotter_basegraphserrors Mix-In Classes for Error Indicators
 \ingroup jkqtplotter_mixins

-\defgroup jkqtplotter_basegraphs_stylemixins Mix-In Classes for Plot Styling
+\defgroup jkqtplotter_basegraphs_stylemixins Mix-In Classes for Styling General Graphs
+\ingroup jkqtplotter_mixins
+
+\defgroup jkqtplotter_specialgraphs_stylemixins Mix-In Classes for Styling Specialized Graphs (Boxplots etz.)
 \ingroup jkqtplotter_mixins


@ -116,6 +119,21 @@ This group assembles graphs that show their data with symbols and optionally wit
 </table>


+\defgroup jkqtplotter_graphlabels Labeling Datapoints
+\ingroup jkqtplotter_concretegraphs
+
+This group assembles graphs that add (textual) labels to the datapoints in a plot:
+<table>
+    <tr>
+      <th> Screenshot
+      <th> Classes
+    <tr>
+      <td>\image html JKQTPGLSimpleBoxAndLineONLYLABELS_small.png
+      <td> JKQTPXYGraphLabels
+</table>
+
+
+
 \defgroup jkqtplotter_filledgraphs Filled Polygon/Area Graphs
 \ingroup jkqtplotter_concretegraphs

@ -243,6 +261,9 @@ Examples:
    <tr>
      <td>\image html geo_text_small.png
      <td> JKQTPGeoText
+    <tr>
+      <td>\image html JKQTPGLSimpleBoxAndLineONLYLABELS_small.png
+      <td> JKQTPXYGraphLabels
    <tr>
      <td>\image html JKQTPHorizontalRange_small.png
      <td> JKQTPHorizontalRange, JKQTPVerticalRange
--- a/doc/dox/todo.dox
+++ b/doc/dox/todo.dox
@ -20,7 +20,6 @@ This page lists several todos and wishes for future version of JKQTPlotter
    <li>graphs: gant-chart as simplified vector field with (x,y1,y2) or (x1,x2,y), or (x,y,dx), (x,y,dy) ... different head/tail style</li>
    <li>graphs: matrix plots with boxes, labels, ...</li>
    <li>graphs: matrix plots with symbols: symbol-type, color, size should be parametric, cf. scatter plots</li>
-    <li>graphs: text labels at positions/for graphs</li>
    <li>graphs: vector field graph (arrows), variant (x,y,dx,dy), (x,y,alpha,length), (x1,y1,x2,y2) ... different head/tail styles</li>
    <li>graphs: waterfall charts (see https://en.wikipedia.org/wiki/Waterfall_chart)</li>
    <li>graphs: parametrized variant of JKQTPSingleColumnSymbolsGraph (beeswarm plots etz.) where each symbol may have a color given by a second column</li> 
--- a/doc/dox/whatsnew.dox
+++ b/doc/dox/whatsnew.dox
@ -127,6 +127,7 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
    <li>NEW/REWORKED all functions in JKQTBasePlotter are re-entrant, i.e. different instances can be used from different threads in parallel (although there is some overhead due to shared caches between the threads!). This is demonstrated and discussed in \ref JKQTPlotterMultiThreaded . </li>
    <li>NEW: allow linear-gradient(), currentcolor, ... in brush definitions of style.ini-file ... and using it is cyberpunk and dark styles</li>
    <li>NEW: style simple_noaxes.ini</li>
+    <li>NEW: JKQTPXYGraphLabels which can draw a label next to each datapoint in the given x/y-dataset. The labels can be x-/y- or x&y-coordinates or custom, then defined by a user-supplied functor (+example \ref JKQTPlotterGraphLabels)</li>
  </ul></li>
  
  <li>JKQTMathText:<ul>
--- a/doc/images/JKQTPGLSimple.png
+++ b/doc/images/JKQTPGLSimple.png
--- a/doc/images/JKQTPGLSimpleBoxAndLine.png
+++ b/doc/images/JKQTPGLSimpleBoxAndLine.png
--- a/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELS.png
+++ b/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELS.png
--- a/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELSVertical.png
+++ b/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELSVertical.png
--- a/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELSVertical_small.png
+++ b/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELSVertical_small.png
--- a/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELS_small.png
+++ b/doc/images/JKQTPGLSimpleBoxAndLineONLYLABELS_small.png
--- a/doc/images/JKQTPGLSimpleBoxAndLineVertical.png
+++ b/doc/images/JKQTPGLSimpleBoxAndLineVertical.png
--- a/doc/images/JKQTPGLSimpleVertical.png
+++ b/doc/images/JKQTPGLSimpleVertical.png
--- a/doc/images/JKQTPGLabelAboveData.png
+++ b/doc/images/JKQTPGLabelAboveData.png
--- a/doc/images/JKQTPGLabelAwayFromXAxis.png
+++ b/doc/images/JKQTPGLabelAwayFromXAxis.png
--- a/doc/images/JKQTPGLabelAwayFromYAxis.png
+++ b/doc/images/JKQTPGLabelAwayFromYAxis.png
--- a/doc/images/JKQTPGLabelBelowData.png
+++ b/doc/images/JKQTPGLabelBelowData.png
--- a/doc/images/JKQTPGLabelLeftHandSide.png
+++ b/doc/images/JKQTPGLabelLeftHandSide.png
--- a/doc/images/JKQTPGLabelRightHandSide.png
+++ b/doc/images/JKQTPGLabelRightHandSide.png
--- a/doc/images/JKQTPGLabelTowardsXAxis.png
+++ b/doc/images/JKQTPGLabelTowardsXAxis.png
--- a/doc/images/JKQTPGLabelTowardsYAxis.png
+++ b/doc/images/JKQTPGLabelTowardsYAxis.png
--- a/doc/images/jkqtpxygraphlabels.png
+++ b/doc/images/jkqtpxygraphlabels.png
--- a/doc/images/jkqtpxygraphlabels.svg
+++ b/doc/images/jkqtpxygraphlabels.svg
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+         id="tspan11780"
+         x="217.15215"
+         y="58.137436"
+         style="stroke-width:0.548019">LabelXPadding</tspan></text>
+    <path
+       style="fill:none;stroke:#ff0000;stroke-width:0.99328px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow1Send)"
+       d="m 203.23396,70.791905 h 8.26759"
+       id="path13399"
+       inkscape:export-filename="C:\Jan\Programmieren\JKQtPlotter\doc\images\jkqtpxygraphlabels.png"
+       inkscape:export-xdpi="61.449596"
+       inkscape:export-ydpi="61.449596" />
+    <path
+       style="fill:none;stroke:#ff0000;stroke-width:0.99328px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow1Send)"
+       d="m 224.74512,70.791905 h -8.26759"
+       id="path13401"
+       inkscape:export-filename="C:\Jan\Programmieren\JKQtPlotter\doc\images\jkqtpxygraphlabels.png"
+       inkscape:export-xdpi="61.449596"
+       inkscape:export-ydpi="61.449596" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-weight:normal;font-size:21.9208px;line-height:1.25;font-family:sans-serif;fill:#ff0000;fill-opacity:1;stroke:none;stroke-width:0.548019"
+       x="226.49074"
+       y="81.483917"
+       id="text13419"
+       inkscape:export-filename="C:\Jan\Programmieren\JKQtPlotter\doc\images\jkqtpxygraphlabels.png"
+       inkscape:export-xdpi="61.449596"
+       inkscape:export-ydpi="61.449596"><tspan
+         sodipodi:role="line"
+         id="tspan13417"
+         x="226.49074"
+         y="81.483917"
+         style="stroke-width:0.548019">LabelBorderWidth</tspan></text>
+  </g>
+</svg>
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@ -74,6 +74,7 @@ if (JKQtPlotter_BUILD_LIB_JKQTPLOTTER)
    add_subdirectory(geo_simple)
    add_subdirectory(geo_coordinateaxis0)
    add_subdirectory(geometric)
+    add_subdirectory(graphlabels)
    add_subdirectory(imageplot)
    add_subdirectory(imageplot_cimg)
    add_subdirectory(imageplot_modifier)
--- a/examples/graphlabels/CMakeLists.txt
+++ b/examples/graphlabels/CMakeLists.txt
@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.23)
+
+set(EXAMPLE_NAME graphlabels)
+set(EXENAME jkqtptest_${EXAMPLE_NAME})
+
+message( STATUS "..   Building Example ${EXAMPLE_NAME}" )
+
+
+
+add_executable(${EXENAME} WIN32 ${EXAMPLE_NAME}.cpp)
+target_link_libraries(${EXENAME} JKQTPExampleToolsLib)
+target_include_directories(${EXENAME} PRIVATE ../../lib)
+target_link_libraries(${EXENAME} ${jkqtplotter_namespace}JKQTPlotter${jkqtplotter_LIBNAME_VERSION_PART})
+
+# precomiled headers to speed up compilation
+if (JKQtPlotter_BUILD_WITH_PRECOMPILED_HEADERS)
+  target_precompile_headers(${EXENAME} REUSE_FROM jkqtptest_simpletest)
+endif (JKQtPlotter_BUILD_WITH_PRECOMPILED_HEADERS)
+
+
+# Installation
+install(TARGETS ${EXENAME} RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
+#Installation of Qt DLLs on Windows
+jkqtplotter_deployqt(${EXENAME})
--- a/examples/graphlabels/README.md
+++ b/examples/graphlabels/README.md
@ -0,0 +1,16 @@
+# Example (JKQTPlotter): Simple Graph Labels Example {#JKQTPlotterGraphLabels}
+This project (see [`graphlabels`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/graphlabels) demonstrates the use of JKQTPXYGraphLabels to add labels to the datapoints of a graph. 
+
+The source code of the main application is (see [`graphlabels.cpp`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/graphlabels/graphlabels.cpp):
+```.cpp
+```
+
+
+The result looks like this:
+
+![graphlabels](https://raw.githubusercontent.com/jkriege2/JKQtPlotter/master/screenshots/graphlabels.png)
+
+or this:
+
+![graphlabels_hor](https://raw.githubusercontent.com/jkriege2/JKQtPlotter/master/screenshots/graphlabels_hor.png)
+
--- a/examples/graphlabels/graphlabels.cpp
+++ b/examples/graphlabels/graphlabels.cpp
@ -0,0 +1,144 @@
+/** \example graphlabels.cpp
+ * Shows how to draw datapoint labels using JKQTPXYGraphLabels
+ *
+ * \ref JKQTPlotterGraphLabels
+ */
+ 
+#include "jkqtpexampleapplication.h"
+#include <QApplication>
+#include "jkqtplotter/jkqtplotter.h"
+#include "jkqtplotter/graphs/jkqtpscatter.h"
+#include "jkqtplotter/graphs/jkqtpbarchart.h"
+#include "jkqtplotter/graphs/jkqtpgraphlabels.h"
+#include "jkqtpexampleapplication.h"
+
+#define Ndata 6
+
+
+template <class TCHART>
+std::pair<TCHART*, JKQTPXYGraphLabels*> doExample(JKQTPlotter& plot, const QString& title, JKQTPGraphLabelPosition labPos)
+{
+    // 1. create a plotter window and get a pointer to the internal datastore (for convenience)
+    plot.getPlotter()->setUseAntiAliasingForGraphs(true); // nicer (but slower) plotting
+    plot.getPlotter()->setUseAntiAliasingForSystem(true); // nicer (but slower) plotting
+    plot.getPlotter()->setUseAntiAliasingForText(true); // nicer (but slower) text rendering
+    JKQTPDatastore* ds=plot.getDatastore();
+
+
+
+    // 2. make up some arbitrary data to be used for plotting
+    const size_t columnX=ds->addLinearColumn(Ndata, -1,1,"x");
+    const size_t columnY=ds->addCalculatedColumnFromColumn(columnX, [](double x) { return jkqtp_roundToDigits(-sin(x*3.0),2);}, "data");
+
+
+    // 3. create barchart and line-chart to display the data:
+    TCHART* graph1=new TCHART(&plot);
+    graph1->setBarPositionColumn(columnX);
+    graph1->setBarHeightColumn(columnY);
+    graph1->setTitle(QObject::tr("dataset: bars"));
+    graph1->setColor(QColorWithAlphaF(graph1->getFillColor(),0.25));
+    JKQTPXYLineGraph* graph2=new JKQTPXYLineGraph(&plot);
+    if (typeid(TCHART)==typeid(JKQTPBarVerticalGraph)) {
+        graph2->setXColumn(columnX);
+        graph2->setYColumn(columnY);
+    } else {
+        graph2->setXColumn(columnY);
+        graph2->setYColumn(columnX);
+    }
+    graph2->setTitle(QObject::tr("dataset: lines"));
+    graph2->setColor(QColorWithAlphaF(graph2->getLineColor(),0.5));
+
+    // 4.1. create barchart to display the data:
+    JKQTPXYGraphLabels* graphLabels=new JKQTPXYGraphLabels((typeid(TCHART)==typeid(JKQTPBarVerticalGraph)) ? JKQTPXYGraphLabels::YValueLabel : JKQTPXYGraphLabels::XValueLabel, &plot);
+    graphLabels->setXColumn(graph1->getXColumn());
+    graphLabels->setYColumn(graph1->getYColumn());
+
+    // 4.2. set position of labels and some styling options
+    graphLabels->setLabelPosition(labPos);
+    graphLabels->setTextFontSize(14);
+
+    // 5. add the graphs to the plot, so it is actually displayed
+    plot.addGraph(graph1);
+    plot.addGraph(graph2);
+    plot.addGraph(graphLabels);
+
+    // 6. scale the plot so the graph is contained
+    plot.setXY(-1.5,1.5,-1.5,1.5);
+
+    // 7.modify the plot style a bit
+    plot.getXAxis()->setDrawMode1(JKQTPCADMLine);
+    plot.getXAxis()->setDrawMode2(JKQTPCADMLine);
+    plot.getYAxis()->setDrawMode1(JKQTPCADMLine);
+    plot.getYAxis()->setDrawMode2(JKQTPCADMLine);
+
+    // show plotter and make it a decent size
+    plot.setWindowTitle(title);
+    plot.show();
+    plot.resize(400/plot.devicePixelRatioF(),250/plot.devicePixelRatioF());
+
+    return {graph1, graphLabels};
+}
+
+int main(int argc, char* argv[])
+{
+        
+    JKQTPAppSettingController highDPIController(argc,argv);
+    JKQTPExampleApplication app(argc, argv);
+
+    JKQTPlotter plotV;
+    auto gV=doExample<JKQTPBarVerticalGraph>(plotV, "1: JKQTPXYGraphLabels+JKQTPBarVerticalGraph", JKQTPGLabelAwayFromXAxis);
+    JKQTPlotter plotH;
+    auto gH=doExample<JKQTPBarHorizontalGraph>(plotH, "2: JKQTPXYGraphLabels+JKQTPBarHorizontalGraph", JKQTPGLabelAwayFromYAxis);
+
+    app.addExportStepFunctor([&](){
+        gV.second->setLabelPosition(JKQTPGLabelTowardsXAxis);
+        gH.second->setLabelPosition(JKQTPGLabelTowardsYAxis);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+
+    app.addExportStepFunctor([&](){
+        gV.second->setLabelPosition(JKQTPGLabelAboveData);
+        gH.second->setLabelPosition(JKQTPGLabelRightHandSide);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+
+    app.addExportStepFunctor([&](){
+        gV.second->setLabelPosition(JKQTPGLabelBelowData);
+        gH.second->setLabelPosition(JKQTPGLabelLeftHandSide);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+    app.addExportStepFunctor([&](){
+        gV.second->setLabelPosition(JKQTPGLabelAwayFromXAxis);
+        gV.second->setLabelBoxType(JKQTPGLSimpleBox);
+        gV.second->setDrawLabelBoxFrame(true);
+        gH.second->setLabelPosition(JKQTPGLabelAwayFromYAxis);
+        gH.second->setLabelBoxType(JKQTPGLSimpleBox);
+        gH.second->setDrawLabelBoxFrame(true);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+    app.addExportStepFunctor([&](){
+        gV.second->setLabelPosition(JKQTPGLabelAwayFromXAxis);
+        gV.second->setLabelBoxType(JKQTPGLSimpleBoxAndLine);
+        gV.second->setDrawLabelBoxFrame(true);
+        gH.second->setLabelPosition(JKQTPGLabelAwayFromYAxis);
+        gH.second->setLabelBoxType(JKQTPGLSimpleBoxAndLine);
+        gH.second->setDrawLabelBoxFrame(true);
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+    app.addExportStepFunctor([&](){
+        //plotV.getPlotter()->setOnlyGraphVisible(plotV.getPlotter()->indexOfGraph(gV.second));
+        //plotH.getPlotter()->setOnlyGraphVisible(plotH.getPlotter()->indexOfGraph(gH.second));
+        gV.first->setVisible(false);
+        gH.first->setVisible(false);
+
+        plotV.redrawPlot();
+        plotH.redrawPlot();
+    });
+
+    return app.exec();
+}
--- a/examples/multithreaded/README.md
+++ b/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> Release

-<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 11199.2ms<br/>single runtimes = (466.6 +/- 1681.5) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/><br/>  
+<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 12353.5ms<br/>single runtimes = (514.6 +/- 1737.1) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/><br/>  

 <u><b>PARALLEL RESULTS:</b></u><br/>
-runtime, overall = 2157.8ms<br/>single runtimes = (596.8 +/- 85.1) ms<br/>speedup = 6.64x<br/>threads / available = 8 / 16<br/>batch runs = 3<br/><br/><b>speedup vs. serial = 5.2x</b>
+runtime, overall = 3440.1ms<br/>single runtimes = (739.1 +/- 91.8) ms<br/>speedup = 5.16x<br/>threads / available = 8 / 16<br/>batch runs = 3<br/><br/><b>speedup vs. serial = 3.6x</b>

 [comment]:RESULTS_END

--- a/lib/jkqtplotter.pri
+++ b/lib/jkqtplotter.pri
@ -57,6 +57,7 @@ isEmpty(JKQTP_PLOTTER_PRI_INCLUDED) {
               $$PWD/jkqtplotter/graphs/jkqtpbarchart.h \
               $$PWD/jkqtplotter/graphs/jkqtpevaluatedparametriccurve.h \
               $$PWD/jkqtplotter/graphs/jkqtplines.h \
+               $$PWD/jkqtplotter/graphs/jkqtpgraphlabels.h \
               $$PWD/jkqtplotter/gui/jkqtpcomboboxes.h \
               $$PWD/jkqtplotter/gui/jkqtpenhancedspinboxes.h \
               $$PWD/jkqtplotter/gui/jkqtpenhancedtableview.h \
@ -111,6 +112,7 @@ isEmpty(JKQTP_PLOTTER_PRI_INCLUDED) {
               $$PWD/jkqtplotter/graphs/jkqtpbarchart.cpp  \
               $$PWD/jkqtplotter/graphs/jkqtpevaluatedparametriccurve.cpp  \
               $$PWD/jkqtplotter/graphs/jkqtplines.cpp  \
+               $$PWD/jkqtplotter/graphs/jkqtpgraphlabels.cpp  \
               $$PWD/jkqtplotter/gui/jkqtpcomboboxes.cpp \
               $$PWD/jkqtplotter/gui/jkqtpenhancedspinboxes.cpp \
               $$PWD/jkqtplotter/gui/jkqtpenhancedtableview.cpp \
--- a/lib/jkqtplotter/graphs/CMakeLists.txt
+++ b/lib/jkqtplotter/graphs/CMakeLists.txt
@ -31,6 +31,8 @@ target_sources(${lib_name} PRIVATE
    jkqtpstatisticsadaptors.cpp
    jkqtpevaluatedparametriccurve.cpp
    jkqtplines.cpp
+    jkqtpgraphlabelstylemixin.cpp
+    jkqtpgraphlabels.cpp
 )
 # ... and add headers
 target_sources(${lib_name} PUBLIC FILE_SET HEADERS TYPE HEADERS
@ -64,4 +66,6 @@ target_sources(${lib_name} PUBLIC FILE_SET HEADERS TYPE HEADERS
      jkqtpbarchart.h
      jkqtpevaluatedparametriccurve.h
      jkqtplines.h
-)
+      jkqtpgraphlabelstylemixin.h
+      jkqtpgraphlabels.h
+)
--- a/lib/jkqtplotter/graphs/jkqtpboxplotstylingmixins.h
+++ b/lib/jkqtplotter/graphs/jkqtpboxplotstylingmixins.h
@ -34,7 +34,7 @@


 /*! \brief Styling Mix-In for Boxplots
-    \ingroup jkqtplotter_basegraphs_stylemixins
+    \ingroup jkqtplotter_specialgraphs_stylemixins


    \image html plot_boxplothorizontalelement.png
--- a/lib/jkqtplotter/graphs/jkqtpgraphlabels.cpp
+++ b/lib/jkqtplotter/graphs/jkqtpgraphlabels.cpp
@ -0,0 +1,216 @@
+/*
+    Copyright (c) 2008-2022 Jan W. Krieger (<jan@jkrieger.de>)
+
+
+
+    This software is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License (LGPL) as published by
+    the Free Software Foundation, either version 2.1 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License (LGPL) for more details.
+
+    You should have received a copy of the GNU Lesser General Public License (LGPL)
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+
+#include "jkqtplotter/graphs/jkqtpgraphlabels.h"
+#include "jkqtplotter/jkqtpbaseplotter.h"
+#include "jkqtplotter/jkqtplotter.h"
+#include <QDebug>
+#include <QDateTime>
+#include "jkqtcommon/jkqtpdrawingtools.h"
+#include "jkqtplotter/jkqtptools.h"
+
+#define SmallestGreaterZeroCompare_xvsgz() if ((xvsgz>10.0*DBL_MIN)&&((smallestGreaterZero<10.0*DBL_MIN) || (xvsgz<smallestGreaterZero))) smallestGreaterZero=xvsgz;
+
+
+
+JKQTPXYGraphLabels::JKQTPXYGraphLabels(LabelContentsDefaultType lt, JKQTPlotter* parent):
+    JKQTPXYGraphLabels(lt, parent->getPlotter())
+{
+}
+
+JKQTPXYGraphLabels::JKQTPXYGraphLabels(const LabelGenerator &lgen, JKQTBasePlotter *parent):
+    JKQTPXYGraphLabels(YValueLabel, parent)
+{
+    setCustomLabelGenerator(lgen);
+}
+
+JKQTPXYGraphLabels::JKQTPXYGraphLabels(const LabelGenerator &lgen, JKQTPlotter *parent):
+    JKQTPXYGraphLabels(lgen, parent->getPlotter())
+{
+
+}
+
+JKQTPXYGraphLabels::JKQTPXYGraphLabels(LabelContentsDefaultType lt, JKQTBasePlotter* parent):
+    JKQTPXYGraph(parent), JKQTPGraphValueLabelStyleMixin(parent)
+{
+    sortData=JKQTPXYGraph::Unsorted;
+
+    initValueLabelStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Default);
+
+    switch(lt) {
+    case XValueLabel:
+        setDefaultXLabelGenerator();
+        break;
+    case YValueLabel:
+        setDefaultYLabelGenerator();
+        break;
+    case XYValueLabel:
+        setDefaultXYLabelGenerator();
+        break;
+    }
+}
+
+void JKQTPXYGraphLabels::draw(JKQTPEnhancedPainter& painter) {
+#ifdef JKQTBP_AUTOTIMER
+    JKQTPAutoOutputTimer jkaaot("JKQTPXYGraphLabels::draw");
+#endif
+    if (parent==nullptr) return;
+    const JKQTPDatastore* datastore=parent->getDatastore();
+    if (datastore==nullptr) return;
+
+    drawErrorsBefore(painter);
+    {
+        painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+
+        int imax=0;
+        int imin=0;
+        if (getIndexRange(imin, imax)) {
+            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));
+                const double x=transformX(xv);
+                const double y=transformY(yv);
+                if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)  &&  JKQTPIsOKFloat(x) && JKQTPIsOKFloat(y)) {
+                    const QString label=generateLabel(xv,yv,iii);
+                    drawLabel(painter, QPointF(x,y), QPointF(xv,yv), label, parent);
+                }
+            }
+
+        }
+    }
+    drawErrorsAfter(painter);
+}
+
+void JKQTPXYGraphLabels::drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) {
+    painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+    painter.setFont(QFont(QGuiApplication::font().family(), getTextFontSize()));
+    painter.setPen(getTextColor());
+    painter.drawText(rect,Qt::AlignHCenter|Qt::AlignVCenter, "12");
+}
+
+QColor JKQTPXYGraphLabels::getKeyLabelColor() const {
+    return getTextColor();
+}
+
+void JKQTPXYGraphLabels::setColor(QColor c, bool setTextColor_, bool setFrameColor_)
+{
+    if (setTextColor_) setTextColor(c);
+    if (setFrameColor_) setLineColor(c);
+}
+
+void JKQTPXYGraphLabels::setCustomLabelGenerator(const LabelGenerator &labgen)
+{
+    m_labelGenerator=labgen;
+}
+
+void JKQTPXYGraphLabels::setDefaultXLabelGenerator()
+{
+    m_labelGenerator=std::bind(std::mem_fn(&JKQTPXYGraphLabels::generateDefaultXLabel), this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
+}
+
+void JKQTPXYGraphLabels::setDefaultYLabelGenerator()
+{
+    m_labelGenerator=std::bind(std::mem_fn(&JKQTPXYGraphLabels::generateDefaultYLabel), this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
+}
+
+void JKQTPXYGraphLabels::setDefaultXYLabelGenerator()
+{
+    m_labelGenerator=std::bind(std::mem_fn(&JKQTPXYGraphLabels::generateDefaultXYLabel), this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3);
+}
+
+
+bool JKQTPXYGraphLabels::getXMinMax(double &minx, double &maxx, double &smallestGreaterZero)
+{
+    const bool baseResult=JKQTPXYGraph::getXMinMax(minx,maxx,smallestGreaterZero);
+    if (baseResult) {
+        /*
+        // this does not work, as it depends on the widget size, when called!!!
+        qDebug()<<"JKQTPXYGraphLabels::getXMinMax():";
+        qDebug()<<"  minx="<<minx<<", maxx="<<maxx;
+        const double delta=(isLabelPositioningGrowingInY())? 0.0: parent->pt2px(getLabelOffset()+getLabelXPadding()+getTextFontSize()*2.0,96.0);
+        const double mi_x=transformX(minx);
+        const double ma_x=transformX(maxx);
+        qDebug()<<"  mi_x="<<mi_x<<", ma_x="<<ma_x<<", delta="<<delta;
+        const double new_mi_x=backtransformX(qMin(mi_x,ma_x)-delta);
+        const double new_ma_x=backtransformX(qMax(mi_x,ma_x)+delta);
+        qDebug()<<"  new_mi_x="<<new_mi_x<<", new_ma_x="<<new_ma_x;
+        minx=qMin(minx,qMin(new_mi_x,new_ma_x));
+        maxx=qMax(maxx,qMax(new_mi_x,new_ma_x));
+        qDebug()<<"->minx="<<minx<<", maxx="<<maxx;*/
+
+        // ... so if required, we just extend the range by ~15%
+        if (!isLabelPositioningGrowingInX()) {
+            const double mi_x=transformY(minx);
+            const double ma_x=transformY(maxx);
+            const double delta=fabs(ma_x-mi_x)*0.15/2.0;
+            const double new_mi=backtransformY(qMax(mi_x,ma_x)+delta);
+            const double new_ma=backtransformY(qMin(mi_x,ma_x)-delta);
+            minx=qMin(minx,qMin(new_mi,new_ma));
+            maxx=qMax(maxx,qMax(new_mi,new_ma));
+        }
+    }
+    return baseResult;
+}
+
+bool JKQTPXYGraphLabels::getYMinMax(double &miny, double &maxy, double &smallestGreaterZero)
+{
+    const bool baseResult=JKQTPXYGraph::getYMinMax(miny,maxy,smallestGreaterZero);
+    if (baseResult) {
+        /*
+        qDebug()<<"JKQTPXYGraphLabels::getXMinMax():";
+        qDebug()<<"  minx="<<miny<<", maxx="<<maxy;
+        const double delta=(!isLabelPositioningGrowingInY())?0.0: parent->pt2px(getLabelOffset()+getLabelYPadding()*2.0+getTextFontSize(),96.0);
+        const double mi_y=transformY(miny);
+        const double ma_y=transformY(maxy);
+        qDebug()<<"  mi_x="<<mi_y<<", ma_x="<<ma_y<<", delta="<<delta;
+        const double new_mi_y=backtransformY(qMin(mi_y,ma_y)-delta);
+        const double new_ma_y=backtransformY(qMax(mi_y,ma_y)+delta);
+        qDebug()<<"  new_mi_x="<<new_mi_y<<", new_ma_x="<<new_ma_y;
+        miny=qMin(miny,qMin(new_mi_y,new_ma_y));
+        maxy=qMax(maxy,qMax(new_mi_y,new_ma_y));
+        qDebug()<<"->minx="<<miny<<", maxx="<<maxy;
+        */
+        // ... so if required, we just extend the range by ~10%
+        if (isLabelPositioningGrowingInY()) {
+            const double mi_y=transformY(miny);
+            const double ma_y=transformY(maxy);
+            const double delta=fabs(ma_y-mi_y)*0.15/2.0;
+            const double new_mi=backtransformY(qMax(mi_y,ma_y)+delta);
+            const double new_ma=backtransformY(qMin(mi_y,ma_y)-delta);
+            miny=qMin(miny,qMin(new_mi,new_ma));
+            maxy=qMax(maxy,qMax(new_mi,new_ma));
+        }
+
+    }
+    return baseResult;
+}
+
+QString JKQTPXYGraphLabels::generateLabel(double x, double y, int index) const
+{
+    if (m_labelGenerator) return m_labelGenerator(x,y,index);
+    else {
+        qWarning()<<"no label generator functor set in JKQTPXYGraphLabels";
+        return "";
+    }
+}
+
+
--- a/lib/jkqtplotter/graphs/jkqtpgraphlabels.h
+++ b/lib/jkqtplotter/graphs/jkqtpgraphlabels.h
@ -0,0 +1,168 @@
+/*
+    Copyright (c) 2008-2024 Jan W. Krieger (<jan@jkrieger.de>)
+
+    
+
+    This software is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License (LGPL) as published by
+    the Free Software Foundation, either version 2.1 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License (LGPL) for more details.
+
+    You should have received a copy of the GNU Lesser General Public License (LGPL)
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef jkqtpgraphlabels_H
+#define jkqtpgraphlabels_H
+
+
+#include <QString>
+#include <QPainter>
+#include <QPair>
+#include <functional>
+#include "jkqtplotter/jkqtptools.h"
+#include "jkqtplotter/jkqtplotter_imexport.h"
+#include "jkqtplotter/jkqtpgraphsbase.h"
+#include "jkqtplotter/graphs/jkqtpgraphlabelstylemixin.h"
+
+// forward declarations
+class JKQTBasePlotter;
+class JKQTPlotter;
+class JKQTPCoordinateAxis;
+class JKQTPDatastore;
+
+
+
+/*! \brief This graph plots a series of data labels. This can be used to add number-labels to e.g. a barchart.
+    \ingroup jkqtplotter_graphlabels
+
+    Sometimes it is necessary to display the numeric value of a datapoint right in the plot.
+    To achieve this, JKQTPXYGraphLabels is provided, which draws a text-label next to each datapoint in a
+    series of x- and y-values (thus it is derived from JKQTPXYGraph). Each label is drawn with a little offset
+    from the actual datapoint. Under each label, a small (stylable) box is drawn, which is by default simply
+    the same color as the background color of complete plot, but with transparency, thus providing a certain
+    level of contrast to the text, even if drawn above other plot elements. Use the properties of the parent
+    mix-in class JKQTPGraphValueLabelStyleMixin to style the text and the box.
+
+    Here is an example of labels together with a bars and lines chart:
+
+    \image html JKQTPGLabelAwayFromXAxis.png
+
+    To achieve this, use code like this:
+    \code
+        // create barchart and line-chart to display the data:
+        JKQTPBarVerticalGraph* graph1=new JKQTPBarVerticalGraph(&plot);
+        graph1->setBarPositionColumn(columnX);
+        graph1->setBarHeightColumn(columnY);
+
+        JKQTPXYLineGraph* graph2=new JKQTPXYLineGraph(&plot);
+        graph2->setXColumn(columnX);
+        graph2->setYColumn(columnY);
+
+        // create the data labels:
+        JKQTPXYGraphLabels* graphLabels=new JKQTPXYGraphLabels(JKQTPXYGraphLabels::YValueLabel, &plot);
+        graphLabels->setXColumn(graph1->getXColumn());
+        graphLabels->setYColumn(graph1->getYColumn());
+        graphLabels->setLabelPosition(JKQTPGLabelAwayFromXAxis),
+
+        // add the graphs to the plot, so it is actually displayed
+        plot.addGraph(graph1);
+        plot.addGraph(graph2);
+        plot.addGraph(graphLabels);
+    \endcode
+
+    The text shown in the label is determined by a functor of type JKQTPXYGraphLabels::LabelGenerator that calculates
+    it from the labels position and data-index.
+    This functor can be custimized (set setCustomLabelGenerator() or the matching constructor), or it may be one of
+    three default immplementations, that display:
+      - the current x-value (JKQTPXYGraphLabels::XValueLabel constructor arguent or setDefaultXLabelGenerator() )
+      - the current y-value (JKQTPXYGraphLabels::YValueLabel constructor arguent or setDefaultYLabelGenerator() )
+      - the current x- and y-value (JKQTPXYGraphLabels::XYValueLabel constructor arguent or setDefaultXYLabelGenerator() )
+    .
+
+    The default generators can be further customized with a series of properties on how to format their output:
+      - setXValueLabelFormat(), setYValueLabelFormat(), setXYValueLabelFormat() ... these set the basic label and are
+        typically only \c "$%1$" or \c "$%1/%2$" , but you can set them to any string (\c %1 / \c %2 is replaced by
+        the string-converted x-/y-values) and e.g. add a prefix, like \c setXValueLabelFormat("$x=%1$").
+        You can use any LaTeX-markup that is allowed by JKQTMathText here!
+      - setXDefaultConverter(), setXDefaultPrecision(), setXBelowIsZero(), ... (all these exist in X and Y variants!)
+    .
+
+    \see \ref JKQTPlotterGraphLabels
+
+ */
+class JKQTPLOTTER_LIB_EXPORT JKQTPXYGraphLabels: public JKQTPXYGraph, public JKQTPGraphValueLabelStyleMixin, public JKQTPXYLabelsGeneratorMixin {
+        Q_OBJECT
+    public:
+        enum LabelContentsDefaultType {
+            XValueLabel, //!< \brief generates a label with the x-coordinate only, calls setDefaultXLabelGenerator()
+            YValueLabel, //!< \brief generates a label with the y-coordinate only, calls setDefaultYLabelGenerator()
+            XYValueLabel //!< \brief generates a label with the x- and y-coordinate, calls setDefaultXYLabelGenerator()
+        };
+        Q_ENUM(LabelContentsDefaultType)
+        /** \brief type of a functor that generates a label */
+        typedef std::function<QString(double,double,int)> LabelGenerator;
+
+        /** \brief class constructor, generates a JKQTPXYGraphLabels with one of the default label generator functors (x-value, y-value or x+y-values) */
+        explicit JKQTPXYGraphLabels(LabelContentsDefaultType lt, JKQTBasePlotter* parent=nullptr);
+        /** \brief class constructor, generates a JKQTPXYGraphLabels with one of the default label generator functors (x-value, y-value or x+y-values) */
+        JKQTPXYGraphLabels(LabelContentsDefaultType lt, JKQTPlotter* parent);
+        /** \brief class constructor, generates a JKQTPXYGraphLabels with a custom LabelGenerator functor */
+        JKQTPXYGraphLabels(const LabelGenerator& lgen, JKQTBasePlotter* parent=nullptr);
+        /** \brief class constructor, generates a JKQTPXYGraphLabels with a custom LabelGenerator functor */
+        JKQTPXYGraphLabels(const LabelGenerator& lgen, JKQTPlotter* parent);
+
+        /** \brief plots the graph to the plotter object specified as parent */
+        virtual void draw(JKQTPEnhancedPainter& painter) override;
+        /** \brief plots a key marker inside the specified rectangle \a rect */
+        virtual void drawKeyMarker(JKQTPEnhancedPainter& painter, const QRectF& rect) override;
+        /** \brief returns the color to be used for the key label */
+        virtual QColor getKeyLabelColor() const override;
+        /** \copydoc JKQTPPlotElement::getXMinMax() */
+        virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
+        /** \copydoc JKQTPPlotElement::getYMinMax() */
+        virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
+
+
+        /** \brief set color of line and symbol */
+        void setColor(QColor c, bool setTextColor_=true, bool setFrameColor_=true);
+        /** \brief sets a custom label geneator function of type LabelGenerator to use
+         *
+         *  \see m_labelGenerator, setDefaultXLabelGenerator(), setDefaultYLabelGenerator(), setDefaultXYLabelGenerator()
+         */
+        void setCustomLabelGenerator(const LabelGenerator& labgen);
+        /** \brief sets the label geneator function to a default implementation, that prints the x-value only
+         *
+         *  The generator uses m_xValueLabelFormat, m_xDefaultConverter, ...
+         *  \see m_labelGenerator, setCustomLabelGenerator(), setDefaultXLabelGenerator(), setDefaultYLabelGenerator(), setDefaultXYLabelGenerator()
+         */
+        void setDefaultXLabelGenerator();
+        /** \brief sets the label geneator function to a default implementation, that prints the y-value only
+         *
+         *  The generator uses m_yValueLabelFormat, m_yDefaultConverter, ...
+         *  \see m_labelGenerator, setCustomLabelGenerator(), setDefaultXLabelGenerator(), setDefaultYLabelGenerator(), setDefaultXYLabelGenerator()
+         */
+        void setDefaultYLabelGenerator();
+        /** \brief sets the label geneator function to a default implementation, that prints the x- and y-value
+         *
+         *  The generator uses m_xyValueLabelFormat, m_xDefaultConverter, m_yDefaultConverter, ...
+         *  \see m_labelGenerator, setCustomLabelGenerator(), setDefaultXLabelGenerator(), setDefaultYLabelGenerator(), setDefaultXYLabelGenerator()
+         */
+        void setDefaultXYLabelGenerator();
+    protected:
+        /** \brief generates the label at position (\a x , \a y ) and at the given data \a index */
+        QString generateLabel(double x, double y, int index) const;
+    private:
+        /** \brief generate the label for the datapoint at location (\a x , \a y ) and being the \a index -th value in the columns */
+        LabelGenerator m_labelGenerator;
+};
+
+
+
+
+#endif // jkqtpgraphlabels_H
--- a/lib/jkqtplotter/graphs/jkqtpgraphlabelstylemixin.cpp
+++ b/lib/jkqtplotter/graphs/jkqtpgraphlabelstylemixin.cpp
@ -0,0 +1,524 @@
+/*
+    Copyright (c) 2008-2024 Jan W. Krieger (<jan@jkrieger.de>)
+
+    
+
+    This software is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License (LGPL) as published by
+    the Free Software Foundation, either version 2.1 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License (LGPL) for more details.
+
+    You should have received a copy of the GNU Lesser General Public License (LGPL)
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "jkqtplotter/graphs/jkqtpgraphlabelstylemixin.h"
+#include "jkqtplotter/jkqtpbaseplotter.h"
+#include <QApplication>
+#include <QDebug>
+#include <QDateTime>
+
+
+QString JKQTPGraphLabelPosition2String(JKQTPGraphLabelPosition pos)
+{
+    switch(pos) {
+    case JKQTPGLabelAboveData: return "label_above_data";
+    case JKQTPGLabelBelowData: return "label_below_data";
+    case JKQTPGLabelLeftHandSide: return "label_left_hand_side";
+    case JKQTPGLabelRightHandSide: return "label_right_hand_side";
+    case JKQTPGLabelAwayFromXAxis: return "label_away_from_xaxis";
+    case JKQTPGLabelAwayFromYAxis: return "label_away_from_yaxis";
+    case JKQTPGLabelTowardsXAxis: return "label_towards_xaxis";
+    case JKQTPGLabelTowardsYAxis: return "label_towards_xaxis";
+    }
+    return "label_away_from_xaxis";
+}
+
+JKQTPGraphLabelPosition String2JKQTPGraphLabelPosition(const QString &pos)
+{
+    const QString m=pos.trimmed().toLower();
+    if (m=="label_above_data" || m=="above_data" || m=="above") return JKQTPGLabelAboveData;
+    if (m=="label_below_data" || m=="below_data" || m=="below") return JKQTPGLabelBelowData;
+    if (m=="label_left_hand_side" || m=="left_hand_side" || m=="left_hand" || m=="left" || m=="lhs") return JKQTPGLabelLeftHandSide;
+    if (m=="label_right_hand_side" || m=="right_hand_side" || m=="right_hand" || m=="right" || m=="rhs") return JKQTPGLabelRightHandSide;
+    if (m=="label_away_from_xaxis" || m=="away_from_xaxis") return JKQTPGLabelAwayFromXAxis;
+    if (m=="label_away_from_yaxis" || m=="away_from_yaxis") return JKQTPGLabelAwayFromYAxis;
+    if (m=="label_towars_xaxis" || m=="towars_xaxis") return JKQTPGLabelTowardsXAxis;
+    if (m=="label_towars_yaxis" || m=="towars_yaxis") return JKQTPGLabelTowardsYAxis;
+    return JKQTPGraphLabelDefault;
+}
+
+QString JKQTPGraphLabelBoxType2String(JKQTPGraphLabelBoxType pos)
+{
+    switch(pos) {
+    case JKQTPGLSimpleBox: return "simple_box";
+    case JKQTPGLSimpleBoxAndLine: return "simple_box_and_line";
+    }
+    return "simple_box";
+}
+
+JKQTPGraphLabelBoxType String2JKQTPGraphLabelBoxType(const QString &pos)
+{
+    const QString m=pos.trimmed().toLower();
+    if (m=="simple_box" || m=="simple" || m=="box") return JKQTPGLSimpleBox;
+    if (m=="simple_box_and_line" || m=="box_and_line") return JKQTPGLSimpleBoxAndLine;
+    return JKQTPGraphLabelBoxDefault;
+}
+
+
+
+JKQTPGraphValueLabelStyleMixin::JKQTPGraphValueLabelStyleMixin(JKQTBasePlotter *parent):
+    JKQTPGraphTextStyleMixin(parent), JKQTPGraphLineStyleMixin(), JKQTPGraphFillStyleMixin()
+{
+    m_labelOffset=getTextFontSize()/4.0;
+    m_labelOffsetWithConnector=getTextFontSize()*0.75;
+    m_labelBoxRounding=getTextFontSize()/3.0;
+    m_labelXPadding=getTextFontSize()/3.0;
+    m_labelYPadding=getTextFontSize()/8.0;
+    m_labelPosition=JKQTPGraphLabelDefault;
+    m_labelBoxType=JKQTPGLSimpleBox;
+    m_drawLabelBoxFrame=false;
+    setFillStyle(Qt::NoBrush);
+}
+
+void JKQTPGraphValueLabelStyleMixin::initValueLabelStyle(JKQTBasePlotter *parent, int &parentPlotStyle, JKQTPPlotStyleType styletype)
+{
+
+    setFillStyle(Qt::NoBrush);
+    if (parent) { // get style settings from parent object
+        initTextStyle(parent, parentPlotStyle,styletype);
+        initLineStyle(parent, parentPlotStyle, styletype);
+        initFillStyle(parent, parentPlotStyle, styletype);
+        setFillColor(QColorWithAlphaF(parent->getCurrentPlotterStyle().plotBackgroundBrush.color(), 0.5));
+        setFillStyle(Qt::SolidPattern);
+        setLineWidth(parent->getCurrentPlotterStyle().keyStyle.frameWidth);
+    }
+}
+
+JKQTPGraphValueLabelStyleMixin::~JKQTPGraphValueLabelStyleMixin()
+{
+
+}
+
+void JKQTPGraphValueLabelStyleMixin::setLabelOffset(double r)
+{
+    m_labelOffset=r;
+}
+
+double JKQTPGraphValueLabelStyleMixin::getLabelOffset() const
+{
+    return m_labelOffset;
+}
+
+double JKQTPGraphValueLabelStyleMixin::getUsedLabelOffset() const
+{
+    if (m_labelBoxType==JKQTPGLSimpleBox) {
+        return m_labelOffset;
+    }
+
+    return m_labelOffsetWithConnector;
+}
+
+void JKQTPGraphValueLabelStyleMixin::setLabelOffsetWithConnector(double r)
+{
+    m_labelOffsetWithConnector=r;
+}
+
+double JKQTPGraphValueLabelStyleMixin::getLabelOffsetWithConnector() const
+{
+    return m_labelOffsetWithConnector;
+}
+void JKQTPGraphValueLabelStyleMixin::setLabelBoxRounding(double r)
+{
+    m_labelBoxRounding=r;
+}
+
+double JKQTPGraphValueLabelStyleMixin::getLabelBoxRounding() const
+{
+    return m_labelBoxRounding;
+}
+
+void JKQTPGraphValueLabelStyleMixin::setLabelXPadding(double r)
+{
+    m_labelXPadding=r;
+}
+
+double JKQTPGraphValueLabelStyleMixin::getLabelXPadding() const
+{
+    return m_labelXPadding;
+}
+
+void JKQTPGraphValueLabelStyleMixin::setLabelYPadding(double r)
+{
+    m_labelYPadding=r;
+}
+
+double JKQTPGraphValueLabelStyleMixin::getLabelYPadding() const
+{
+    return m_labelYPadding;
+}
+
+void JKQTPGraphValueLabelStyleMixin::setLabelPosition(JKQTPGraphLabelPosition r)
+{
+    m_labelPosition=r;
+}
+
+JKQTPGraphLabelPosition JKQTPGraphValueLabelStyleMixin::getLabelPosition() const
+{
+    return m_labelPosition;
+}
+
+bool JKQTPGraphValueLabelStyleMixin::isLabelPositioningGrowingInX() const
+{
+    switch (m_labelPosition) {
+    case JKQTPGLabelAwayFromYAxis:
+    case JKQTPGLabelLeftHandSide:
+    case JKQTPGLabelRightHandSide:
+        return true;
+    case JKQTPGLabelAboveData:
+    case JKQTPGLabelBelowData:
+    case JKQTPGLabelAwayFromXAxis:
+    case JKQTPGLabelTowardsXAxis:
+    case JKQTPGLabelTowardsYAxis:
+        return false;
+    }
+    return false;
+}
+
+bool JKQTPGraphValueLabelStyleMixin::isLabelPositioningGrowingInY() const
+{
+    switch (m_labelPosition) {
+    case JKQTPGLabelAwayFromXAxis:
+    case JKQTPGLabelAboveData:
+    case JKQTPGLabelBelowData:
+        return true;
+    case JKQTPGLabelAwayFromYAxis:
+    case JKQTPGLabelTowardsXAxis:
+    case JKQTPGLabelTowardsYAxis:
+    case JKQTPGLabelLeftHandSide:
+    case JKQTPGLabelRightHandSide:
+        return false;
+    }
+    return false;
+}
+
+void JKQTPGraphValueLabelStyleMixin::setDrawLabelBoxFrame(bool r)
+{
+    m_drawLabelBoxFrame=r;
+}
+
+bool JKQTPGraphValueLabelStyleMixin::drawsLabelBoxFrame() const
+{
+    return m_drawLabelBoxFrame;
+}
+
+void JKQTPGraphValueLabelStyleMixin::setLabelBoxType(JKQTPGraphLabelBoxType r)
+{
+    m_labelBoxType=r;
+}
+
+JKQTPGraphLabelBoxType JKQTPGraphValueLabelStyleMixin::getLabelBoxType() const
+{
+    return m_labelBoxType;
+}
+
+void JKQTPGraphValueLabelStyleMixin::drawLabel(JKQTPEnhancedPainter &painter, const QPointF &xDataPixel, const QPointF &xData, const QString &contents, JKQTBasePlotter *parent) const
+{
+    painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
+
+    // calculate geometry
+    const LabelGeometry g=calcLabelGeometry(painter, xDataPixel, xData, contents, parent);
+
+    // draw Box
+    if (m_drawLabelBoxFrame) painter.setPen(getLinePenForRects(painter, parent));
+    else painter.setPen(Qt::NoPen);
+    painter.setBrush(getFillBrush(painter, parent));
+    if (m_labelBoxType==JKQTPGLSimpleBox || m_labelBoxType==JKQTPGLSimpleBoxAndLine) {
+        painter.drawRoundedRectOrRect(g.boxRect, m_labelBoxRounding);
+    }
+    if (m_labelBoxType==JKQTPGLSimpleBoxAndLine) {
+        //qDebug()<<"linestyle="<<getLineStyle()<<", color="<<getLineColor()<<", width="<<getLineWidth();
+        painter.setPen(getLinePen(painter, parent));
+        switch(g.boxpos) {
+        case LabelGeometry::BoxLeft:
+            painter.drawLine(xDataPixel, QPointF(qMax(g.boxRect.left(),g.boxRect.right()), xDataPixel.y()));
+            break;
+        case LabelGeometry::BoxRight:
+            painter.drawLine(xDataPixel, QPointF(qMin(g.boxRect.left(),g.boxRect.right()), xDataPixel.y()));
+            break;
+        case LabelGeometry::BoxTop:
+            painter.drawLine(xDataPixel, QPointF(xDataPixel.x(), qMax(g.boxRect.top(),g.boxRect.bottom())));
+            break;
+        case LabelGeometry::BoxBottom:
+            painter.drawLine(xDataPixel, QPointF(xDataPixel.x(), qMin(g.boxRect.top(),g.boxRect.bottom())));
+            break;
+
+        }
+    }
+
+
+    // draw text
+    parent->getMathText()->setFontSpecial(getTextFontName());
+    parent->getMathText()->setFontSize(getTextFontSize()*parent->getFontSizeMultiplier());
+    parent->getMathText()->setFontColor(getTextColor());
+    parent->getMathText()->parse(contents);
+    parent->getMathText()->draw(painter, Qt::AlignVCenter|Qt::AlignHCenter, g.textRect, parent->getCurrentPlotterStyle().debugShowTextBoxes);
+}
+
+JKQTPGraphValueLabelStyleMixin::LabelGeometry JKQTPGraphValueLabelStyleMixin::calcLabelGeometry(JKQTPEnhancedPainter &painter, const QPointF &xDataPixel, const QPointF &xData, const QString &contents, JKQTBasePlotter *parent) const
+{
+    LabelGeometry res;
+    res.label=contents;
+    res.labelOffsetPx=parent->pt2px(getUsedLabelOffset(),painter);
+    res.padX=parent->pt2px(m_labelXPadding,painter);
+    res.padY=parent->pt2px(m_labelYPadding,painter);
+    res.lw=parent->pt2px(getLineWidth(),painter);
+    res.textSize=parent->getTextSizeDetail(getTextFontName(), getTextFontSize(), contents, painter);
+
+    if(m_labelPosition==JKQTPGLabelAboveData || (m_labelPosition==JKQTPGLabelAwayFromXAxis && xData.y()>=0) || (m_labelPosition==JKQTPGLabelTowardsXAxis && xData.y()<0)) {
+        // label above
+        res.textRect=QRectF(xDataPixel.x()-res.textSize.width/2.0, xDataPixel.y()-res.labelOffsetPx-res.padY-res.lw/2.0-res.textSize.overallHeight, res.textSize.width, res.textSize.overallHeight);
+        res.boxpos=LabelGeometry::BoxTop;
+    } else if (m_labelPosition==JKQTPGLabelBelowData || (m_labelPosition==JKQTPGLabelAwayFromXAxis && xData.y()<0) || (m_labelPosition==JKQTPGLabelTowardsXAxis && xData.y()>=0)) {
+        // label below
+        res.textRect=QRectF(xDataPixel.x()-res.textSize.width/2.0, xDataPixel.y()+res.labelOffsetPx+res.padY+res.lw/2.0, res.textSize.width, res.textSize.overallHeight);
+        res.boxpos=LabelGeometry::BoxBottom;
+    } else if(m_labelPosition==JKQTPGLabelLeftHandSide || (m_labelPosition==JKQTPGLabelAwayFromYAxis && xData.x()<0) || (m_labelPosition==JKQTPGLabelTowardsYAxis && xData.x()>=0)) {
+        // lhs
+        res.textRect=QRectF(xDataPixel.x()-res.labelOffsetPx-res.padX-res.lw/2.0-res.textSize.width, xDataPixel.y()-res.textSize.overallHeight/2.0, res.textSize.width, res.textSize.overallHeight);
+        res.boxpos=LabelGeometry::BoxLeft;
+    } else if (m_labelPosition==JKQTPGLabelRightHandSide || (m_labelPosition==JKQTPGLabelAwayFromYAxis && xData.x()>=0) || (m_labelPosition==JKQTPGLabelTowardsYAxis && xData.x()<0)) {
+        // rhs
+        res.textRect=QRectF(xDataPixel.x()+res.labelOffsetPx+res.padX+res.lw/2.0, xDataPixel.y()-res.textSize.overallHeight/2.0, res.textSize.width, res.textSize.overallHeight);
+        res.boxpos=LabelGeometry::BoxRight;
+    }
+
+    res.boxRect=QRectF(res.textRect.x()-res.padX-res.lw/2.0, res.textRect.y()-res.padY-res.lw/2.0, res.textRect.width()+res.padX*2.0+res.lw, res.textRect.height()+res.padY*2.0+res.lw);
+
+    return res;
+}
+
+JKQTPXYLabelsGeneratorMixin::JKQTPXYLabelsGeneratorMixin():
+    m_xValueLabelFormat("$%1$"),
+    m_yValueLabelFormat("$%1$"),
+    m_xyValueLabelFormat("$%1 / %2$"),
+    m_xDefaultConverter(JKQTPGLDefaultConverter),
+    m_yDefaultConverter(JKQTPGLDefaultConverter),
+    m_xDefaultPrecision(4),
+    m_yDefaultPrecision(4),
+    m_xBelowIsZero(std::numeric_limits<double>::min()*4),
+    m_yBelowIsZero(std::numeric_limits<double>::min()*4),
+    m_xMinNoExponent(1e-3),
+    m_yMinNoExponent(1e-3),
+    m_xMaxNoExponent(1e4),
+    m_yMaxNoExponent(1e4),
+    m_xDateTimeFormat(QLocale().dateTimeFormat(QLocale::NarrowFormat)),
+    m_yDateTimeFormat(QLocale().dateTimeFormat(QLocale::NarrowFormat))
+{
+
+}
+
+JKQTPXYLabelsGeneratorMixin::~JKQTPXYLabelsGeneratorMixin()
+{
+
+}
+
+int JKQTPXYLabelsGeneratorMixin::getXDefaultPrecision() const
+{
+    return m_xDefaultPrecision;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXDefaultPrecision(int v)
+{
+    m_xDefaultPrecision=v;
+}
+
+int JKQTPXYLabelsGeneratorMixin::getYDefaultPrecision() const
+{
+    return m_yDefaultPrecision;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYDefaultPrecision(int v)
+{
+    m_yDefaultPrecision=v;
+}
+
+JKQTPGraphLabelConverterType JKQTPXYLabelsGeneratorMixin::getXDefaultConverter() const
+{
+    return m_xDefaultConverter;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXDefaultConverter(JKQTPGraphLabelConverterType v)
+{
+    m_xDefaultConverter=v;
+}
+
+JKQTPGraphLabelConverterType JKQTPXYLabelsGeneratorMixin::getYDefaultConverter() const
+{
+    return m_yDefaultConverter;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYDefaultConverter(JKQTPGraphLabelConverterType v)
+{
+    m_yDefaultConverter=v;
+}
+
+QString JKQTPXYLabelsGeneratorMixin::getXValueLabelFormat() const
+{
+    return m_xValueLabelFormat;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXValueLabelFormat(const QString &v)
+{
+    m_xValueLabelFormat=v;
+}
+
+QString JKQTPXYLabelsGeneratorMixin::getYValueLabelFormat() const
+{
+    return m_yValueLabelFormat;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYValueLabelFormat(const QString &v)
+{
+    m_yValueLabelFormat=v;
+}
+
+QString JKQTPXYLabelsGeneratorMixin::getXYValueLabelFormat() const
+{
+    return m_xyValueLabelFormat;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXYValueLabelFormat(const QString &v)
+{
+    m_xyValueLabelFormat=v;
+}
+
+double JKQTPXYLabelsGeneratorMixin::getXBelowIsZero() const
+{
+    return m_xBelowIsZero;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXBelowIsZero(double v)
+{
+    m_xBelowIsZero=v;
+}
+
+double JKQTPXYLabelsGeneratorMixin::getYBelowIsZero() const
+{
+    return m_yBelowIsZero;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYBelowIsZero(double v)
+{
+    m_yBelowIsZero=v;
+}
+
+double JKQTPXYLabelsGeneratorMixin::getXMinNoExponent() const
+{
+    return m_xMinNoExponent;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXMinNoExponent(double v)
+{
+    m_xMinNoExponent=v;
+}
+
+double JKQTPXYLabelsGeneratorMixin::getYMinNoExponent() const
+{
+    return m_yMinNoExponent;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYMinNoExponent(double v)
+{
+    m_yMinNoExponent=v;
+}
+
+double JKQTPXYLabelsGeneratorMixin::getXMaxNoExponent() const
+{
+    return m_xMaxNoExponent;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXMaxNoExponent(double v)
+{
+    m_xMaxNoExponent=v;
+}
+
+double JKQTPXYLabelsGeneratorMixin::getYMaxNoExponent() const
+{
+    return m_yMaxNoExponent;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYMaxNoExponent(double v)
+{
+    m_yMaxNoExponent=v;
+}
+
+QString JKQTPXYLabelsGeneratorMixin::getXDateTimeFormmat() const
+{
+    return m_xDateTimeFormat;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setXDateTimeFormmat(const QString &v)
+{
+    m_xDateTimeFormat=v;
+}
+
+QString JKQTPXYLabelsGeneratorMixin::getYDateTimeFormmat() const
+{
+    return m_yDateTimeFormat;
+}
+
+void JKQTPXYLabelsGeneratorMixin::setYDateTimeFormmat(const QString &v)
+{
+    m_yDateTimeFormat=v;
+}
+
+
+QString JKQTPXYLabelsGeneratorMixin::generateDefaultXLabel(double x, double , int ) const
+{
+    return m_xValueLabelFormat.arg(xValToString(x));
+}
+
+QString JKQTPXYLabelsGeneratorMixin::generateDefaultYLabel(double , double y, int ) const
+{
+    return m_yValueLabelFormat.arg(yValToString(y));
+}
+
+QString JKQTPXYLabelsGeneratorMixin::generateDefaultXYLabel(double x, double y, int ) const
+{
+    return m_xyValueLabelFormat.arg(xValToString(x)).arg(yValToString(y));
+}
+
+QString JKQTPXYLabelsGeneratorMixin::valToString(double x, JKQTPGraphLabelConverterType converter, int precision, double belowIsZero, double minNoExponent, double maxNoExponent, const QString& dateTimeFormat)
+{
+    switch(converter) {
+    case JKQTPGLCdecimal: return jkqtp_floattoqstr(x,'f',precision,true);
+    case JKQTPGLCscientific: return jkqtp_floattoqstr(x,'e',precision,true);
+    case JKQTPGLCexponentCharacter: return jkqtp_floattolatexunitqstr(x,precision,true, belowIsZero);
+    case JKQTPGLCexponent: return jkqtp_floattolatexqstr(x,precision,true, belowIsZero,minNoExponent,maxNoExponent);
+    case JKQTPGLCdatetime: {
+        QDateTime dt;
+        dt.setMSecsSinceEpoch(uint64_t(x));
+        return dt.toString(dateTimeFormat);
+    }
+    }
+    qWarning()<<"unknown m_xDefaultConverter="<<converter<<" in JKQTPXYLabelsGeneratorMixin::xValToString()";
+    return "";
+}
+
+QString JKQTPXYLabelsGeneratorMixin::xValToString(double x) const
+{
+    return valToString(x, m_xDefaultConverter,m_xDefaultPrecision, m_xBelowIsZero, m_xMinNoExponent,m_xMaxNoExponent, m_xDateTimeFormat);
+}
+
+QString JKQTPXYLabelsGeneratorMixin::yValToString(double x) const
+{
+    return valToString(x, m_yDefaultConverter,m_yDefaultPrecision, m_yBelowIsZero, m_yMinNoExponent,m_yMaxNoExponent, m_yDateTimeFormat);
+}
+
+
--- a/lib/jkqtplotter/graphs/jkqtpgraphlabelstylemixin.h
+++ b/lib/jkqtplotter/graphs/jkqtpgraphlabelstylemixin.h
@ -0,0 +1,429 @@
+/*
+    Copyright (c) 2008-2024 Jan W. Krieger (<jan@jkrieger.de>)
+
+    
+
+    This software is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License (LGPL) as published by
+    the Free Software Foundation, either version 2.1 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License (LGPL) for more details.
+
+    You should have received a copy of the GNU Lesser General Public License (LGPL)
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef jkqtpgraphlabelstylemixin_H
+#define jkqtpgraphlabelstylemixin_H
+
+
+#include <QString>
+#include <QPainter>
+#include <QPen>
+#include <QBrush>
+#include "jkqtplotter/jkqtptools.h"
+#include "jkqtplotter/jkqtplotter_imexport.h"
+#include "jkqtplotter/jkqtpbaseplotter.h"
+#include "jkqtcommon/jkqtpdrawingtools.h"
+#include "jkqtplotter/jkqtplotter_configmacros.h"
+#include "jkqtplotter/jkqtpgraphsbasestylingmixins.h"
+
+
+class JKQTPlotter; // forward
+
+
+
+/** \brief position of a label near a data-point, used by JKQTPGraphValueLabelStyleMixin
+ *  \ingroup jkqtplotter_specialgraphs_stylemixins
+ *
+ *  \see JKQTPGraphValueLabelStyleMixin
+ */
+enum JKQTPGraphLabelPosition {
+    JKQTPGLabelAboveData=0, /*!< \brief all labels always above the datapoint \image html JKQTPGLabelAboveData.png */
+    JKQTPGLabelBelowData, /*!< \brief all labels always below the datapoint \image html JKQTPGLabelBelowData.png */
+    JKQTPGLabelTowardsXAxis, /*!< \brief all labels between the datapoint and the x-axis the datapoint \image html JKQTPGLabelTowardsXAxis.png */
+    JKQTPGLabelAwayFromXAxis, /*!< \brief all labels pointing away from the x-axis \image html JKQTPGLabelAwayFromXAxis.png */
+    JKQTPGLabelRightHandSide, /*!< \brief all labels always on the right-hand side of the datapoint \image html JKQTPGLabelRightHandSide.png */
+    JKQTPGLabelLeftHandSide, /*!< \brief all labels always on the left-hand side of the datapoint \image html JKQTPGLabelLeftHandSide.png */
+    JKQTPGLabelTowardsYAxis, /*!< \brief all labels between the datapoint and the y-axis the datapoint \image html JKQTPGLabelTowardsYAxis.png */
+    JKQTPGLabelAwayFromYAxis, /*!< \brief all labels pointing away from the y-axis \image html JKQTPGLabelAwayFromYAxis.png */
+
+    JKQTPGraphLabelDefault=JKQTPGLabelAwayFromXAxis,
+};
+
+
+/** \brief converts a JKQTPGraphLabelPosition variable into a human-readable string
+ * \ingroup jkqtplotter_specialgraphs_stylemixins
+ */
+JKQTPLOTTER_LIB_EXPORT QString JKQTPGraphLabelPosition2String(JKQTPGraphLabelPosition pos);
+
+/** \brief converts a String into a JKQTPGraphLabelPosition
+ * \ingroup jkqtplotter_specialgraphs_stylemixins
+ */
+JKQTPLOTTER_LIB_EXPORT JKQTPGraphLabelPosition String2JKQTPGraphLabelPosition(const QString& pos);
+
+/** \brief type of box surrounding a label near a data-point, used by JKQTPGraphValueLabelStyleMixin
+ *  \ingroup jkqtplotter_specialgraphs_stylemixins
+ *
+ *  \see JKQTPGraphValueLabelStyleMixin
+ */
+enum JKQTPGraphLabelBoxType {
+    JKQTPGLSimpleBox=0, /*!< \brief a simple (possibly rounded and outlined) box \image html JKQTPGLSimpleBox.png */
+    JKQTPGLSimpleBoxAndLine=1, /*!< \brief a simple (possibly rounded and outlined) box, connected to the datapoint by a line \image html JKQTPGLSimpleBoxAndLine.png */
+
+    JKQTPGraphLabelBoxDefault=JKQTPGLSimpleBox,
+};
+
+
+/** \brief converts a JKQTPGraphLabelBoxType variable into a human-readable string
+ * \ingroup jkqtplotter_specialgraphs_stylemixins
+ */
+JKQTPLOTTER_LIB_EXPORT QString JKQTPGraphLabelBoxType2String(JKQTPGraphLabelBoxType pos);
+
+/** \brief converts a String into a JKQTPGraphLabelBoxType
+ * \ingroup jkqtplotter_specialgraphs_stylemixins
+ */
+JKQTPLOTTER_LIB_EXPORT JKQTPGraphLabelBoxType String2JKQTPGraphLabelBoxType(const QString& pos);
+
+
+
+
+/*! \brief This Mix-In class provides setter/getter methods, storage and other facilities for value labels in graphs
+    \ingroup jkqtplotter_specialgraphs_stylemixins
+
+    in addition to all properties of JKQTPGraphTextStyleMixin for the actual label text,
+    JKQTPGraphLineStyleMixin & JKQTPGraphFillStyleMixin for a box around the label,
+    it also supports properties for positioning and further sryling the labels.
+
+    supported properties:
+      - padding from actual label to border
+      - distance of label to actual datapoint
+      - positioning of the label
+      - styling for the box around the label
+    .
+
+    \image html jkqtpxygraphlabels.png
+
+    \see JKQTPGraphTextStyleMixin, JKQTPGraphLineStyleMixin, JKQTPGraphFillStyleMixin, JKQTPXYGraphLabels
+ */
+class JKQTPLOTTER_LIB_EXPORT JKQTPGraphValueLabelStyleMixin: public JKQTPGraphTextStyleMixin, public JKQTPGraphLineStyleMixin, public JKQTPGraphFillStyleMixin {
+#ifndef JKQTPLOTTER_WORKAROUND_QGADGET_BUG
+    Q_GADGET
+#endif
+public:
+
+
+    /** \brief class constructor */
+    JKQTPGraphValueLabelStyleMixin(JKQTBasePlotter *parent);
+
+    /** \brief initiaize the fill style (from the parent plotter) */
+    void initValueLabelStyle(JKQTBasePlotter* parent, int &parentPlotStyle, JKQTPPlotStyleType styletype=JKQTPPlotStyleType::Default);
+
+    virtual ~JKQTPGraphValueLabelStyleMixin();
+
+    /** \copydoc m_labelOffset */
+    void setLabelOffset(double r);
+    /** \copydoc m_labelOffset */
+    double getLabelOffset() const;
+    /** \brief determines, whether to use getLabelOffset() or getLabelOffsetWithConnector() (or something else) and returns it */
+    double getUsedLabelOffset() const;
+
+    /** \copydoc m_labelOffsetWithConnector */
+    void setLabelOffsetWithConnector(double r);
+    /** \copydoc m_labelOffsetWithConnector */
+    double getLabelOffsetWithConnector() const;
+
+    /** \copydoc m_labelBoxRounding */
+    void setLabelBoxRounding(double r);
+    /** \copydoc m_labelBoxRounding */
+    double getLabelBoxRounding() const;
+
+    /** \copydoc m_labelXPadding */
+    void setLabelXPadding(double r);
+    /** \copydoc m_labelXPadding */
+    double getLabelXPadding() const;
+
+
+    /** \copydoc m_labelYPadding */
+    void setLabelYPadding(double r);
+    /** \copydoc m_labelYPadding */
+    double getLabelYPadding() const;
+
+    /** \copydoc m_labelPosition */
+    void setLabelPosition(JKQTPGraphLabelPosition r);
+    /** \copydoc m_labelPosition */
+    JKQTPGraphLabelPosition getLabelPosition() const;
+    /** \brief determines whether a label is positioned left of the mininmum, or right of the maxinmum datapoint (\c true )  */
+    bool isLabelPositioningGrowingInX() const;
+    /** \brief determines whether a label is positioned below the mininmum, or above the maxinmum datapoint (\c true )  */
+    bool isLabelPositioningGrowingInY() const;
+
+    /** \copydoc m_drawLabelBoxFrame */
+    void setDrawLabelBoxFrame(bool r);
+    /** \copydoc m_drawLabelBoxFrame */
+    bool drawsLabelBoxFrame() const;
+
+    /** \copydoc m_labelBoxType */
+    void setLabelBoxType(JKQTPGraphLabelBoxType r);
+    /** \copydoc m_labelBoxType */
+    JKQTPGraphLabelBoxType getLabelBoxType() const;
+
+    /** \brief draws a label, including its box
+     *
+     *  \brief painter the JKQTPEnhancedPainter to use  for drawing
+     *  \brief xDataPixel position of the labeled datapoint in (screen) pixels
+     *  \brief xData x- and y-coordinate of the datapoint (needed for some JKQTPGraphLabelPosition)
+     *  \brief contents the text to be rendered
+     *  \brief parent the JKQTPBasePlotter in whos context we are drawing (e.g. needed to render \a contents )
+     *
+     */
+    void drawLabel(JKQTPEnhancedPainter& painter, const QPointF& xDataPixel, const QPointF& xData, const QString& contents, JKQTBasePlotter *parent) const;
+
+
+
+#ifndef JKQTPLOTTER_WORKAROUND_QGADGET_BUG
+    Q_PROPERTY(double labelOffset MEMBER m_labelOffset READ getLabelOffset WRITE setLabelOffset)
+    Q_PROPERTY(double labelOffsetWithConnector MEMBER m_labelOffsetWithConnector READ getLabelOffsetWithConnector WRITE setLabelOffsetWithConnector)
+    Q_PROPERTY(double labelBoxRounding MEMBER m_labelBoxRounding READ getLabelBoxRounding WRITE setLabelBoxRounding)
+    Q_PROPERTY(double labelXPadding MEMBER m_labelXPadding READ getLabelXPadding WRITE setLabelXPadding)
+    Q_PROPERTY(double labelYPadding MEMBER m_labelYPadding READ getLabelYPadding WRITE setLabelYPadding)
+    Q_PROPERTY(JKQTPGraphLabelPosition labelPosition MEMBER m_labelPosition READ getLabelPosition WRITE setLabelPosition)
+    Q_PROPERTY(bool drawLabelBoxFrame MEMBER m_drawLabelBoxFrame READ drawsLabelBoxFrame WRITE setDrawLabelBoxFrame)
+    Q_PROPERTY(JKQTPGraphLabelBoxType labelBoxType MEMBER m_labelBoxType READ getLabelBoxType WRITE setLabelBoxType)
+#endif
+
+protected:
+    /** \brief describes details about the geometry of a label, used by calcLabelGeometry() */
+    struct LabelGeometry {
+        inline LabelGeometry():
+            labelOffsetPx(0.0),
+            padX(0.0),
+            padY(0.0),
+            lw(0.0),
+            label(""),
+            textSize(),
+            textRect(),
+            boxRect(),
+            boxpos(BoxTop)
+            { };
+        double labelOffsetPx;
+        double padX;
+        double padY;
+        double lw;
+        QString label;
+        JKQTMathTextNodeSize textSize;
+        QRectF textRect;
+        QRectF boxRect;
+        enum BoxPos {
+            BoxLeft,
+            BoxRight,
+            BoxTop,
+            BoxBottom
+        };
+        BoxPos boxpos;
+    };
+
+    /** \brief calculate everything that is necessary to draw a label, including its box
+     *
+     *  \brief painter the JKQTPEnhancedPainter to use  for drawing
+     *  \brief xDataPixel position of the labeled datapoint in (screen) pixels
+     *  \brief xData x- and y-coordinate of the datapoint (needed for some JKQTPGraphLabelPosition)
+     *  \brief contents the text to be rendered
+     *  \brief parent the JKQTPBasePlotter in whos context we are drawing (e.g. needed to render \a contents )
+     *
+     */
+    LabelGeometry calcLabelGeometry(JKQTPEnhancedPainter& painter, const QPointF& xDataPixel, const QPointF& xData, const QString& contents, JKQTBasePlotter *parent) const;
+
+private:
+    /** \brief offset of the box rectangle to the actual data point location [pt], this is used for simple boxes and is a rather close distance (e.g. JKQTPGLSimpleBox)
+     *
+     *  \see setLabelOffset(), getLabelOffset(), setLabelOffsetWithConnector(), getLabelOffsetWithConnector()
+     */
+    double m_labelOffset;
+    /** \brief offset of the box rectangle to the actual data point location [pt], this variant is used when a visible connector is shown (e.g. JKQTPGLSimpleBoxAndLine)
+     *
+     *  \see setLabelOffsetWithConnector(), getLabelOffsetWithConnector(), setLabelOffset(), getLabelOffset()
+     */
+    double m_labelOffsetWithConnector;
+    /** \brief rounding radius of the box rectangle (<=0 -> no rounded rectangle) [pt] */
+    double m_labelBoxRounding;
+    /** \brief padding in x-direction between label and surrounding box [pt] */
+    double m_labelXPadding;
+    /** \brief padding in y-direction between label and surrounding box [pt] */
+    double m_labelYPadding;
+    /** \brief indicates whether to draw a frame around the box */
+    bool m_drawLabelBoxFrame;
+    /** \brief position of the label
+     *
+     *  \see JKQTPGraphLabelPosition for details on available options
+     */
+    JKQTPGraphLabelPosition m_labelPosition;
+    /** \brief type or style of the box surrounding the label text
+     *
+     *  \see JKQTPGraphLabelBoxType for details on available options
+     */
+    JKQTPGraphLabelBoxType m_labelBoxType;
+};
+
+
+
+
+/** \brief display mode for the (axis) labels
+ * \ingroup jkqtplotter_specialgraphs_stylemixins */
+enum JKQTPGraphLabelConverterType {
+    JKQTPGLCdecimal, /*!< \brief print the numbers in decimal notation, without using exponent characters e.g. \c "0.00123"  */
+    JKQTPGLCscientific, /*!< \brief print the numbers in scientific notation, e.g. \c "1.23e-4"  */
+    JKQTPGLCexponentCharacter, /*!< \brief print the numbers and show a unit character, i.e. 5&mu; for \f$ 5\cdot 10^{-6} \f$ , \c 3k for \f$ 3\cdot 10^3 \f$ ...  */
+    JKQTPGLCexponent, /*!< \brief show numbers in exponential for, e.g. \f$ 3\cdot 10^5 \f$ ...  */
+    JKQTPGLCdatetime, /*!< \brief show numbers as times  */
+
+    JKQTPGLDefaultConverter=JKQTPGLCexponent,
+    };
+
+
+/*! \brief This Mix-In class provides setter/getter methods, and tools for x- and y-value label formatting (i.e. double to string conversion)
+    \ingroup jkqtplotter_specialgraphs_stylemixins
+
+    \see JKQTPXYGraphLabels
+ */
+class JKQTPLOTTER_LIB_EXPORT JKQTPXYLabelsGeneratorMixin {
+#ifndef JKQTPLOTTER_WORKAROUND_QGADGET_BUG
+    Q_GADGET
+#endif
+public:
+
+    /** \brief class constructor */
+    explicit JKQTPXYLabelsGeneratorMixin();
+
+    virtual ~JKQTPXYLabelsGeneratorMixin();
+
+
+
+    /** \copydoc m_xDefaultPrecision */
+    int getXDefaultPrecision() const;
+    /** \copydoc m_xDefaultPrecision */
+    void setXDefaultPrecision(int v);
+    /** \copydoc m_yDefaultPrecision */
+    int getYDefaultPrecision() const;
+    /** \copydoc m_yDefaultPrecision */
+    void setYDefaultPrecision(int v);
+
+    /** \copydoc m_xDefaultConverter */
+    JKQTPGraphLabelConverterType getXDefaultConverter() const;
+    /** \copydoc m_xDefaultConverter */
+    void setXDefaultConverter(JKQTPGraphLabelConverterType v);
+    /** \copydoc m_yDefaultConverter */
+    JKQTPGraphLabelConverterType getYDefaultConverter() const;
+    /** \copydoc m_yDefaultConverter */
+    void setYDefaultConverter(JKQTPGraphLabelConverterType v);
+
+
+    /** \copydoc m_xValueLabelFormat */
+    QString getXValueLabelFormat() const;
+    /** \copydoc m_xValueLabelFormat */
+    void setXValueLabelFormat(const QString& v);
+    /** \copydoc m_yValueLabelFormat */
+    QString getYValueLabelFormat() const;
+    /** \copydoc m_yValueLabelFormat */
+    void setYValueLabelFormat(const QString& v);
+    /** \copydoc m_xyValueLabelFormat */
+    QString getXYValueLabelFormat() const;
+    /** \copydoc m_xyValueLabelFormat */
+    void setXYValueLabelFormat(const QString& v);
+
+
+    /** \copydoc m_xBelowIsZero */
+    double getXBelowIsZero() const;
+    /** \copydoc m_xBelowIsZero */
+    void setXBelowIsZero(double v);
+    /** \copydoc m_yBelowIsZero */
+    double getYBelowIsZero() const;
+    /** \copydoc m_yBelowIsZero */
+    void setYBelowIsZero(double v);
+
+
+    /** \copydoc m_xMinNoExponent */
+    double getXMinNoExponent() const;
+    /** \copydoc m_xMinNoExponent */
+    void setXMinNoExponent(double v);
+    /** \copydoc m_yMinNoExponent */
+    double getYMinNoExponent() const;
+    /** \copydoc m_yMinNoExponent */
+    void setYMinNoExponent(double v);
+
+
+    /** \copydoc m_xMaxNoExponent */
+    double getXMaxNoExponent() const;
+    /** \copydoc m_xMaxNoExponent */
+    void setXMaxNoExponent(double v);
+    /** \copydoc m_yMaxNoExponent */
+    double getYMaxNoExponent() const;
+    /** \copydoc m_yMaxNoExponent */
+    void setYMaxNoExponent(double v);
+
+
+
+    /** \copydoc m_xDateTimeFormmat */
+    QString getXDateTimeFormmat() const;
+    /** \copydoc m_xDateTimeFormmat */
+    void setXDateTimeFormmat(const QString& v);
+    /** \copydoc m_yDateTimeFormmat */
+    QString getYDateTimeFormmat() const;
+    /** \copydoc m_yDateTimeFormmat */
+    void setYDateTimeFormmat(const QString& v);
+
+
+protected:
+    /** \brief default label generator for x-value only */
+    QString generateDefaultXLabel(double x, double y, int index) const;
+    /** \brief default label generator for y-value only */
+    QString generateDefaultYLabel(double x, double y, int index) const;
+    /** \brief default label generator for x- and y-value */
+    QString generateDefaultXYLabel(double x, double y, int index) const;
+    /** \brief converts \a x to a string, using several of the formatting properties set in this class for x-values */
+    QString xValToString(double x) const;
+    /** \brief converts \a y to a string, using several of the formatting properties set in this class for y-values */
+    QString yValToString(double y) const;
+    /** \rief converts \a x to a QString, using the provided options */
+    static QString valToString(double x, JKQTPGraphLabelConverterType m_xDefaultConverter, int m_xDefaultPrecision, double m_xBelowIsZero, double m_xMinNoExponent, double m_xMaxNoExponent, const QString& m_xDateTimeFormat);
+private:
+    /** \brief format string for the x-label, use \c %1 as placeholder for the numeric value */
+    QString m_xValueLabelFormat;
+    /** \brief format string for the y-label, use \c %1 as placeholder for the numeric value */
+    QString m_yValueLabelFormat;
+    /** \brief format string for the x/y-label, use \c %1 as placeholder for the numeric value of x and \c %2 for y */
+    QString m_xyValueLabelFormat;
+    /** \brief type of number to string conversion for x-values */
+    JKQTPGraphLabelConverterType m_xDefaultConverter;
+    /** \brief type of number to string conversion for y-values */
+    JKQTPGraphLabelConverterType m_yDefaultConverter;
+    /** \brief default precision for x-labels */
+    int m_xDefaultPrecision;
+    /** \brief default precision for x-labels */
+    int m_yDefaultPrecision;
+    /** \brief x-values below this value are treated as exactly 0 */
+    double m_xBelowIsZero;
+    /** \brief y-values below this value are treated as exactly 0 */
+    double m_yBelowIsZero;
+    /** \brief x-values below this value will be shown in exponent notation, above in decimal notation */
+    double m_xMinNoExponent;
+    /** \brief y-values below this value will be shown in exponent notation, above in decimal notation */
+    double m_yMinNoExponent;
+    /** \brief x-values above this value will be shown in exponent notation, below in decimal notation */
+    double m_xMaxNoExponent;
+    /** \brief y-values above this value will be shown in exponent notation, below in decimal notation */
+    double m_yMaxNoExponent;
+    /** \brief format string for datetime -> string conversion of x-values */
+    QString m_xDateTimeFormat;
+    /** \brief format string for datetime -> string conversion of y-value */
+    QString m_yDateTimeFormat;
+};
+
+
+
+#endif // jkqtpgraphlabelstylemixin_H
--- a/lib/jkqtplotter/graphs/jkqtpviolinplotstylingmixins.h
+++ b/lib/jkqtplotter/graphs/jkqtpviolinplotstylingmixins.h
@ -34,7 +34,7 @@


 /*! \brief Styling Mix-In for Violinplots
-    \ingroup jkqtplotter_basegraphs_stylemixins
+    \ingroup jkqtplotter_specialgraphs_stylemixins


    \image html JKQTPViolinplotHorizontalElement_elements.png
--- a/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp
+++ b/lib/jkqtplotter/jkqtpgraphsbasestylingmixins.cpp
@ -36,13 +36,22 @@ JKQTPGraphLineStyleMixin::JKQTPGraphLineStyleMixin()
 void JKQTPGraphLineStyleMixin::initLineStyle(JKQTBasePlotter* parent, int &parentPlotStyle, JKQTPPlotStyleType styletype)
 {
    if (parent) { // get style settings from parent object
-        if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
-        const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
-        m_linePen.setColor(pen.color());
-        m_linePen.setStyle(pen.style());
-        m_lineWidth=pen.widthF();
-        m_highlightingLineColor=getLineColor();
-        m_highlightingLineColor.setAlphaF(0.5);
+        if (styletype==JKQTPPlotStyleType::Annotation) {
+            m_linePen=QPen(parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultLineStyle);
+            m_linePen.setColor(parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultColor);
+            m_linePen.setWidthF(parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultLineWidth);
+            m_lineWidth=m_linePen.widthF();
+            m_highlightingLineColor=getLineColor();
+            m_highlightingLineColor.setAlphaF(0.5);
+        } else {
+            if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_linePen.setColor(pen.color());
+            m_linePen.setStyle(pen.style());
+            m_lineWidth=pen.widthF();
+            m_highlightingLineColor=getLineColor();
+            m_highlightingLineColor.setAlphaF(0.5);
+        }
    }
 }

@ -219,14 +228,22 @@ JKQTPGraphSymbolStyleMixin::JKQTPGraphSymbolStyleMixin()
 void JKQTPGraphSymbolStyleMixin::initSymbolStyle(JKQTBasePlotter *parent, int& parentPlotStyle, JKQTPPlotStyleType styletype)
 {
    if (parent) { // get style settings from parent object
-        if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
-        const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
-        m_symbolColor=pen.color();
-        m_symbolSize=pen.symbolSize();
-        m_symbolLineWidth=pen.symbolLineWidthF();
-        m_symbolType=pen.symbol();
-        m_symbolFillColor=pen.symbolFillColor();
-        m_symbolFontName=parent->getDefaultTextFontName();
+        if (styletype==JKQTPPlotStyleType::Annotation) {
+            m_symbolType=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultSymbol;
+            m_symbolColor=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultColor;
+            m_symbolLineWidth=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultSymbolLineWidth;
+            m_symbolSize=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultSymbolSize;
+            m_symbolFillColor=JKQTPGetDerivedColor(parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.symbolFillColorDerivationMode, m_symbolColor);
+        } else {
+            if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_symbolColor=pen.color();
+            m_symbolSize=pen.symbolSize();
+            m_symbolLineWidth=pen.symbolLineWidthF();
+            m_symbolType=pen.symbol();
+            m_symbolFillColor=pen.symbolFillColor();
+            m_symbolFontName=parent->getDefaultTextFontName();
+        }
    }
 }

@ -395,10 +412,15 @@ void JKQTPGraphFillStyleMixin::initFillStyleInvertedColor(JKQTPGraphFillStyleMix
 void JKQTPGraphFillStyleMixin::initFillStyle(JKQTBasePlotter *parent, int &parentPlotStyle, JKQTPPlotStyleType styletype)
 {
    if (parent) { // get style settings from parent object
-        if (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
-        const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
-        m_fillColor=pen.fillColor();
-        m_fillBrush=pen.fillStyle().brush(m_fillColor);
+        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 (parentPlotStyle<0) parentPlotStyle=parent->getNextStyle();
+            const JKQTBasePlotter::JKQTPPen pen=parent->getPlotStyle(parentPlotStyle, styletype);
+            m_fillColor=pen.fillColor();
+            m_fillBrush=pen.fillStyle().brush(m_fillColor);
+        }
    }
 }

@ -537,10 +559,14 @@ JKQTPGraphTextStyleMixin::JKQTPGraphTextStyleMixin(JKQTBasePlotter *parent)

 void JKQTPGraphTextStyleMixin::initTextStyle(JKQTBasePlotter *parent, int &/*parentPlotStyle*/, JKQTPPlotStyleType styletype)
 {
-    if (parent && styletype==JKQTPPlotStyleType::Annotation) { // get style settings from parent object
-        m_textFontSize=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultFontSize;
+    if (parent) { // get style settings from parent object
        m_textColor=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultTextColor;
        m_textFontName=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultFontName;
+        if (styletype==JKQTPPlotStyleType::Annotation) {
+            m_textFontSize=parent->getCurrentPlotterStyle().graphsStyle.annotationStyle.defaultFontSize;
+        } else {
+            m_textFontSize=QApplication::font().pointSizeF();
+        }
    }
 }

--- a/screenshots/graphlabels.png
+++ b/screenshots/graphlabels.png
--- a/screenshots/graphlabels_hor.png
+++ b/screenshots/graphlabels_hor.png
--- a/screenshots/graphlabels_hor_small.png
+++ b/screenshots/graphlabels_hor_small.png
--- a/screenshots/graphlabels_small.png
+++ b/screenshots/graphlabels_small.png