/*!


\defgroup jkqtplotter_elements Plot Elements
\ingroup jkqtplotter

This group assembles all classes that represent different elements of a plot (managed by JKQTBasePlotter/JKQTPlotter).
There are these major subgroups:
  - \ref jkqtpbaseplotter_elements contains all non-graph objects, i.e. things like coordinate axes and so on
  - \ref jkqtplotter_graphsgroup contains the actual graph classes
.

\defgroup jkqtpbaseplotter_elements Basic (non-graph) Plot Elements (coordinate axes, ...)
\ingroup jkqtplotter_elements

This group contains some tool classes that implement basic elements of the plot (coordinate axes, key, ...).
These classes are used by JKQTPlotterBase to output the plot.


\defgroup jkqtplotter_graphsgroup Graph Classes
\ingroup jkqtplotter_elements

This group contains all classes in the JKQTPlotter library that may be used to draw a graph (i.e. a curve) onto a plot.

\tableofcontents

\section jkqtplotter_graphsgroup_classstructure Graph Class Structure

\subsection jkqtplotter_graphsgroup_classstructure_basics Graph Classes

Each type of graph is represented by another class, which has to be derived from JKQTPPlotElement. This class provides a basic virtual interface
that allows JKQTPlotter to draw the graphs represented by them. This interface consists of these functions:
  - JKQTPPlotElement::draw() draws the graph onto a given JKQTPEnhancedPainter (derived from <a href="http://doc.qt.io/qt-5/qpainter.html">QPainter</a>)
  - JKQTPPlotElement::drawKeyMarker() draws the small marker image in the plot legend
  - JKQTPPlotElement::getKeyLabelColor() returns a color for the legend entry for the graph
  - JKQTPPlotElement::getXMinMax() returns the extent of the graph in x-direction (e.g. for auto-zooming)
  - JKQTPPlotElement::getYMinMax() returns the extent of the graph in Y-direction (e.g. for auto-zooming)
.
In addition to these basic functions, there are additional functions that can be used to draw something outside the actual plot rectangle.
These are used to e.g. add color-scales to the side of the graph:
  - JKQTPPlotElement::getOutsideSize() returns the amount of space required outside the plot rectangle
  - JKQTPPlotElement::drawOutside() draws the elements outside the plot rectangle
.

Usually if writing a new graph, one would not directly
derive from JKQTPPlotElement, but from a cass in it's hirarchy of children. These children already provide certain facilities for certain types of graphs.

\dot
digraph
{
 // LATEX_PDF_SIZE
  bgcolor="transparent";
  edge [fontname="FreeSans",fontsize="12",labelfontname="FreeSans",labelfontsize="12"];
  node [fontname="FreeSans",fontsize="12"];
  rankdir="LR";

  {
    rank=same;
    JKQTPPlotElement [URL="\link JKQTPPlotElement"];
    noteJKQTPPlotElement [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nelements drawn\nonto a plot"];
    JKQTPPlotElement -> noteJKQTPPlotElement [style=dashed,arrowhead=none];
  }

  {
    rank=same;
    JKQTPGraph [URL="\link JKQTPPlotElement"];
    noteJKQTPGraph [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nactual graphs"];
    JKQTPGraph -> noteJKQTPGraph [style=dashed,arrowhead=none];
	
    JKQTPGeometricPlotElement [URL="\link JKQTPGeometricPlotElement"];
    noteJKQTPGeometricPlotElement [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nnon-graph elements,\ne.g. geometric elements"];
    JKQTPGeometricPlotElement -> noteJKQTPGeometricPlotElement [style=dashed,arrowhead=none];
	
    JKQTPPlotAnnotationElement [URL="\link JKQTPPlotAnnotationElement"];
    noteJKQTPPlotAnnotationElement [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraph annotation elements,\ne.g. text, symbols, ranges ..."];
    JKQTPPlotAnnotationElement -> noteJKQTPPlotAnnotationElement [style=dashed,arrowhead=none];
  }


  {
    rank=same;

    JKQTPXYGraph [URL="\link JKQTPXYGraph"]
    noteJKQTPXYGraph [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs based on\n (x,y) data pairs"];
    JKQTPXYGraph -> noteJKQTPXYGraph [style=dashed,arrowhead=none];
	
    JKQTPSingleColumnGraph [URL="\link JKQTPSingleColumnGraph"]
    noteJKQTPSingleColumnGraph [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs based on only\n a single column of data"];
    JKQTPSingleColumnGraph -> noteJKQTPSingleColumnGraph [style=dashed,arrowhead=none];
	
    JKQTPImageBase [URL="\link JKQTPImageBase"]
    noteJKQTPImageBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs that represent \n2D images/matrices"];
    JKQTPImageBase -> noteJKQTPImageBase [style=dashed,arrowhead=none];
  }

  {
    rank=same;

    JKQTPXYYGraph [URL="\link JKQTPXYYGraph"]
    noteJKQTPXYYGraph [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs based on\n (x, y1, y2) data tripels"];
    JKQTPXYYGraph -> noteJKQTPXYYGraph [style=dashed,arrowhead=none];

    JKQTPXXYGraph [URL="\link JKQTPXXYGraph"]
    noteJKQTPXXYGraph [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs based on\n (x1, x2, y) data tripels"];
    JKQTPXXYGraph -> noteJKQTPXXYGraph [style=dashed,arrowhead=none];

    JKQTPXYBaselineGraph [URL="\link JKQTPXYBaselineGraph"]
    noteJJKQTPXYBaselineGraph [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs based on\n (x,y) data pairs and a baseline"];
    JKQTPXYBaselineGraph -> noteJJKQTPXYBaselineGraph [style=dashed,arrowhead=none];
	
    JKQTPEvaluatedFunctionGraphBase [URL="\link JKQTPEvaluatedFunctionGraphBase"]
    noteJKQTPEvaluatedFunctionGraphBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs that represent \ndynamically evaluated functions"];
    JKQTPEvaluatedFunctionGraphBase -> noteJKQTPEvaluatedFunctionGraphBase [style=dashed,arrowhead=none];
	
    JKQTPMathImageBase [URL="\link JKQTPMathImageBase"]
    noteJKQTPMathImageBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ndata-based images"];
    JKQTPMathImageBase -> noteJKQTPMathImageBase [style=dashed,arrowhead=none];
  }  

  {
    rank=same;

    JKQTPBarGraphBase [URL="\link JKQTPBarGraphBase"]
    noteJKQTPBarGraphBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nbarcharts"];
    JKQTPBarGraphBase -> noteJKQTPBarGraphBase [style=dashed,arrowhead=none];

    JKQTPFilledCurveGraphBase [URL="\link JKQTPFilledCurveGraphBase"]
    noteJKQTPFilledCurveGraphBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nfilled graphs"];
    JKQTPFilledCurveGraphBase -> noteJKQTPFilledCurveGraphBase [style=dashed,arrowhead=none];

    JKQTPImpulsesGraphBase [URL="\link JKQTPImpulsesGraphBase"]
    noteJKQTPImpulsesGraphBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nimpulse graphs"];
    JKQTPImpulsesGraphBase -> noteJKQTPImpulsesGraphBase [style=dashed,arrowhead=none];
	
    JKQTPSpecialLineGraphBase [URL="\link JKQTPSpecialLineGraphBase"]
    noteJKQTPSpecialLineGraphBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nspecial line graphs"];
    JKQTPSpecialLineGraphBase -> noteJKQTPSpecialLineGraphBase [style=dashed,arrowhead=none];
	
    JKQTPBoxplotGraphBase [URL="\link JKQTPBoxplotGraphBase"]
    noteJKQTPBoxplotGraphBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs that represent \na set of boxplots"];
    JKQTPBoxplotGraphBase -> noteJKQTPBoxplotGraphBase [style=dashed,arrowhead=none];
	
    JKQTPRangeBase [URL="\link JKQTPRangeBase"];
    noteJKQTPRangeBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\nrange annotations"];
    JKQTPRangeBase -> noteJKQTPRangeBase [style=dashed,arrowhead=none];
	
    JKQTPBoxplotElementBase [URL="\link JKQTPBoxplotElementBase"]
    noteJKQTPBoxplotElementBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs that represent \na single boxplot"];
    JKQTPBoxplotElementBase -> noteJKQTPBoxplotElementBase [style=dashed,arrowhead=none];
	
    JKQTPViolinplotElementBase [URL="\link JKQTPViolinplotElementBase"]
    noteJKQTPViolinplotElementBase [shape="note", color="lightyellow",style=filled,fontsize=8,label="base class for all\ngraphs that represent \na single violin plot"];
    JKQTPViolinplotElementBase -> noteJKQTPViolinplotElementBase [style=dashed,arrowhead=none];
  }  
	
  JKQTPPlotElement -> JKQTPGraph
  JKQTPPlotElement -> JKQTPGeometricPlotElement
  JKQTPPlotElement -> JKQTPPlotAnnotationElement
  JKQTPPlotElement -> JKQTPRangeBase
  JKQTPPlotElement -> JKQTPBoxplotElementBase
  JKQTPPlotElement -> JKQTPViolinplotElementBase

  JKQTPGraph -> JKQTPXYGraph
  JKQTPGraph -> JKQTPSingleColumnGraph
  JKQTPGraph -> JKQTPImageBase -> JKQTPMathImageBase
  JKQTPGraph -> JKQTPEvaluatedFunctionGraphBase
  JKQTPGraph -> JKQTPBoxplotGraphBase

  JKQTPXYGraph -> JKQTPXYYGraph
  JKQTPXYGraph -> JKQTPXXYGraph
  JKQTPXYGraph -> JKQTPXYBaselineGraph
  
  JKQTPXYBaselineGraph -> JKQTPBarGraphBase
  JKQTPXYBaselineGraph -> JKQTPFilledCurveGraphBase
  JKQTPXYBaselineGraph -> JKQTPImpulsesGraphBase
  JKQTPXYBaselineGraph -> JKQTPSpecialLineGraphBase

}

\enddot

\subsection jkqtplotter_graphsgroup_classstructure_mixins Mix-In Classes for Graphs

\see \ref jkqtplotter_basicprinciples_graphs_and_mixins

In addition there are mix-in classes that are used via multiple inheritance
that add additional features and properties to a graph. A prominent example are the classes for \ref jkqtplotter_basegraphserrors "error indicators".
With these there are usually two variants of one type of graph: One without error indicators and one with error indicators, e.g.:
  - JKQTPXYLineGraph shows lines+symbols graphs made up from x/y-value pairs for each data point.
  - JKQTPXYLineErrorGraph extends JKQTPXYLineGraph with error indicator drawing/properties provided by JKQTPXYGraphErrors
.
This approach allows to keep interfaces and appearance recognizeable over different graph classes and locates the source code
for a feature like error indicators in a single/in few class(es).

Another example of such a class is JKQTPColorPaletteStyleAndToolsMixin, which provides functions that allow to use color palettes. It is 
mainly used for the \ref jkqtplotter_imagelots "Image/Matrix graphs", but also by e.g. JKQTPXYParametrizedScatterGraph.

\defgroup jkqtplotter_basegraphs Baseclasses for Graphs
\ingroup jkqtplotter_graphsgroup

\defgroup jkqtplotter_basegraphserrors Mix-In Classes for Error Indicators
\ingroup jkqtplotter_basegraphs

\defgroup jkqtplotter_basegraphs_stylemixins Mix-In Classes for Plot Styling
\ingroup jkqtplotter_basegraphs

\defgroup jkqtplotter_linesymbolgraphs Line/Symbol Graphs
\ingroup jkqtplotter_graphsgroup

This group assembles graphs that show their data with symbols and optionally with connecting lines in diferent styles:
<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html beeswarmplot_small.png
      <td> JKQTPSingleColumnSymbolsGraph
    <tr>
      <td>\image html JKQTPXYScatterGraph_small.png
      <td> JKQTPXYScatterGraph, JKQTPXYScatterErrorGraph
    <tr>
      <td>\image html symbols_and_styles_small.png
      <td> JKQTPXYLineGraph, JKQTPXYLineErrorGraph
    <tr>
      <td>\image html paramscatterplot_small.png
      <td> JKQTPXYParametrizedScatterGraph, JKQTPXYParametrizedErrorScatterGraph
    <tr>
      <td>\image html stepplots_small.png
      <td> JKQTPSpecialLineHorizontalGraph, JKQTPSpecialLineVerticalGraph
</table>

\defgroup jkqtplotter_linesymbolgraphs_simple Basic Line/Scatter Graphs
\ingroup jkqtplotter_linesymbolgraphs

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html beeswarmplot_small.png
      <td> JKQTPSingleColumnSymbolsGraph
    <tr>
      <td>\image html symbols_and_styles_small.png
      <td> JKQTPXYLineGraph, JKQTPXYLineErrorGraph
    <tr>
      <td>\image html stepplots_small.png
      <td> JKQTPSpecialLineHorizontalGraph, JKQTPSpecialLineVerticalGraph
</table>


\defgroup jkqtplotter_linesymbolgraphs_param Parametrized Line/Scatter Graphs
\ingroup jkqtplotter_linesymbolgraphs

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html paramscatterplot_small.png
      <td> JKQTPXYParametrizedScatterGraph, JKQTPXYParametrizedErrorScatterGraph
</table>

\defgroup jkqtplotter_filledgraphs Filled Polygon/Area Graphs
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html filledgraphs_small.png
      <td> JKQTPFilledCurveXGraph, JKQTPFilledCurveYGraph
    <tr>
      <td>\image html JKQTPFilledCurveXErrorGraph_small.png
      <td> JKQTPFilledCurveXErrorGraph, JKQTPFilledCurveYErrorGraph
    <tr>
      <td>\image html JKQTPfilledVerticalRangeGraph_WithLines_small.png
      <td> JKQTPFilledVerticalRangeGraph, JKQTPFilledHorizontalRangeGraph
</table>

\defgroup jkqtplotter_functiongraphs Function Graphs
\ingroup jkqtplotter_linesymbolgraphs

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html functionplot_small.png
      <td> JKQTPXFunctionLineGraph,  JKQTPYFunctionLineGraph
    <tr>
      <td>\image html evalcurve_small.png
      <td> JKQTPXYFunctionLineGraph
</table>

\defgroup jkqtplotter_parsedFgraphs Parsed Function Graphs
\ingroup jkqtplotter_linesymbolgraphs

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html functionplot_small.png
      <td> JKQTPXParsedFunctionLineGraph,  JKQTPYParsedFunctionLineGraph
</table>

\defgroup jkqtplotter_barssticks Barcharts, Impulse-Charts, ...
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html barchart_small.png
      <td> JKQTPBarVerticalGraph,  JKQTPBarHorizontalGraph
    <tr>
      <td>\image html barchart_error_small.png
      <td> JKQTPBarVerticalErrorGraph, JKQTPBarHorizontalErrorGraph
    <tr>
      <td>\image html JKQTPbarVerticalGraphStacked_small.png
      <td> JKQTPBarVerticalStackableGraph, JKQTPBarHorizontalStackableGraph
    <tr>
      <td>\image html impulsesplot_small.png
      <td> JKQTPImpulsesHorizontalGraph, JKQTPImpulsesVerticalGraph
    <tr>
      <td>\image html impulses_errors_small.png
      <td> JKQTPImpulsesHorizontalErrorGraph, JKQTPImpulsesVerticalErrorGraph
</table>

\defgroup jkqtplotter_statgraphs Statistical Graphs (e.g. Boxplots ...)
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html boxplot_small.png
      <td> JKQTPBoxplotVerticalGraph, JKQTPBoxplotHorizontalGraph
    <tr>
      <td>\image html JKQTPViolinplotVerticalElement_small.png
      <td> JKQTPViolinplotVerticalElement, JKQTPViolinplotHorizontalElement
</table>

\see \ref jkqtptools_math_statistics_adaptors for shortcuts to calculate statistical properties of data and then adding a plot with the results.

\defgroup jkqtplotter_geoplots Geometric Elements (Lines, Rectangles, ...)
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html symbol_filled_diamond.png
      <td> JKQTPGeoSymbol
    <tr>
      <td>\image html geo_text_small.png
      <td> JKQTPGeoText
    <tr>
      <td>\image html geo_line_small.png
      <td> JKQTPGeoLine, JKQTPGeoInfiniteLine, JKQTPGeoPolyLines
    <tr>
      <td>\image html geo_arrows_small.png
      <td> JKQTPGeoArrow
    <tr>
      <td>\image html geo_rect_small.png
      <td> JKQTPGeoRectangle
    <tr>
      <td>\image html geo_polygon_small.png
      <td> JKQTPGeoPolygon
    <tr>
      <td>\image html geo_ellipse_small.png
      <td> JKQTPGeoEllipse
    <tr>
      <td>\image html geo_arc_small.png
      <td> JKQTPGeoArc
    <tr>
      <td>\image html geo_pie_small.png
      <td> JKQTPGeoPie
    <tr>
      <td>\image html geo_chords_small.png
      <td> JKQTPGeoChord
</table>

Examples:
  - \ref JKQTPlotterGeometricGraphs
.

\defgroup jkqtplotter_annotations Graph Annotations
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html symbol_filled_diamond.png
      <td> JKQTPGeoSymbol
    <tr>
      <td>\image html geo_text_small.png
      <td> JKQTPGeoText
    <tr>
      <td>\image html JKQTPHorizontalRange_small.png
      <td> JKQTPHorizontalRange, JKQTPVerticalRange
</table>

Examples:
  - \ref JKQTPlotterGeometricGraphs
.

\defgroup jkqtplotter_diverse Diverse Other Graphs (Ranges, ...)
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html JKQTPPeakStreamGraphY_small.png
      <td> JKQTPPeakStreamGraph
    <tr>
      <td>\image html geo_boxplot_small.png
      <td> JKQTPBoxplotVerticalElement, JKQTPBoxplotHorizontalElement
    <tr>
      <td>\image html JKQTPViolinplotVerticalElement_small.png
      <td> JKQTPViolinplotVerticalElement, JKQTPViolinplotHorizontalElement
</table>

\defgroup jkqtplotter_imagelots Matrix/Image Plotting
\ingroup jkqtplotter_graphsgroup

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html rgbimageplot_qt_small.png
      <td> JKQTPImage
    <tr>
      <td>\image html JKQTPMathImageBaseModifyNone_small.png
      <td> JKQTPMathImage, JKQTPColumnMathImage
    <tr>
      <td>\image html rgbimageplots_small.png
      <td> JKQTPRGBMathImage, JKQTPColumnRGBMathImage
    <tr>
      <td>\image html overlayimage_small.png
      <td> JKQTPOverlayImage
    <tr>
      <td>\image html overlayimageenhanced_small.png
      <td>  JKQTPOverlayImageEnhanced, JKQTPColumnOverlayImageEnhanced
    <tr>
      <td>\image html JKQTPColumnContourPlot_small.png
      <td> JKQTPContourPlot, JKQTPColumnContourPlot
</table>

\defgroup jkqtplotter_imagelots_elements Image Graphs
\ingroup jkqtplotter_imagelots


<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html rgbimageplot_qt_small.png
      <td> JKQTPImage
    <tr>
      <td>\image html JKQTPMathImageBaseModifyNone_small.png
      <td> JKQTPMathImage, JKQTPColumnMathImage
    <tr>
      <td>\image html rgbimageplot_cimg_small.png
      <td> JKQTPRGBMathImage, JKQTPColumnRGBMathImage
</table>

\defgroup jkqtplotter_imagelots_overlays Image/Matrix Overlay Graphs
\ingroup jkqtplotter_imagelots

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html overlayimage_small.png
      <td> JKQTPOverlayImage
    <tr>
      <td>\image html overlayimageenhanced_small.png
      <td>  JKQTPOverlayImageEnhanced, JKQTPColumnOverlayImageEnhanced
</table>

\defgroup jkqtplotter_imagelots_tools Tool Functions & Classes for Image Drawing
\ingroup jkqtplotter_imagelots

\defgroup jkqtplotter_imagelots_tools_LUTS Tool Functions to Build Lookup-Tables for Palettes
\ingroup jkqtplotter_imagelots_tools

\defgroup jkqtplotter_imagelots_contour Contour Graphs (based on Image Data)
\ingroup jkqtplotter_imagelots

<table>
    <tr>
      <th> Screenshot
      <th> Classes
    <tr>
      <td>\image html JKQTPColumnContourPlot_small.png
      <td> JKQTPContourPlot, JKQTPColumnContourPlot
</table>


  
*/