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updated barchart doc

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jkriege2 2024-02-11 13:53:10 +01:00
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7 changed files with 110 additions and 121 deletions
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lib/jkqtplotter/graphs/jkqtpbarchart.cpp
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@ -48,7 +48,7 @@ JKQTPBarVerticalGraph::JKQTPBarVerticalGraph(JKQTPlotter* parent):
void JKQTPBarVerticalGraph::draw(JKQTPEnhancedPainter& painter) {
#ifdef JKQTBP_AUTOTIMER
JKQTPAutoOutputTimer jkaaot("JKQTPBarHorizontalGraph::draw");
JKQTPAutoOutputTimer jkaaot("JKQTPBarVerticalGraph::draw");
#endif
if (parent==nullptr) return;
const JKQTPDatastore* datastore=parent->getDatastore();

147
lib/jkqtplotter/graphs/jkqtpbarchart.h
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@ -32,66 +32,21 @@
#include "jkqtplotter/graphs/jkqtpbarchartbase.h"
/*! \brief This implements a vertical bar graph with bars between \f$ y=\mbox{baseline} \f$ and \f$ y=f(x) \f$
\ingroup jkqtplotter_barcharts
This class plots a bargraph. This image explains the parameters:
\image html bargraph_basics.png
By default the shift parameter is, so the bar is centered at the x-value. The width is 0.9,
so adjacent bars are plotted with a small distance between them. It is possible to use these two parameters
to plot multiple bars for every x-value, by having on JKQTPSpecialLineHorizontalGraph object per
set of bars that belong together. For example for three bars per x-value one would set:
\verbatim
width=0.3
shift=-0.3 / 0 / +0.3
\endverbatim
This results in a bargraph, as shown here:
\image html JKQTPBarVerticalGraph.png
You can also set JKQTPBarGraphBase::FillMode::TwoColorFilling, which uses different fill styles for bars above and below
the baseline of the graph:
\image html JKQTPBarVerticalGraphTwoColorFilling.png
If you use JKQTPBarGraphBase::FillMode::FunctorFilling you can specify the fill style by a functor, e.g.
\code
graph->setFillMode(JKQTPBarGraphBase::FillMode::FunctorFilling);
graph->setFillBrushFunctor(
[](double key, double value) {
return QBrush(QColor::fromHsvF(key/12.0, 1.0, 1.0));
}
);
\endcode
The result may look like this:
\image html JKQTPBarVerticalGraphFunctorFilling.png
You can also completely customize the drawing by defining a custom draw functor:
\code
graph->setCustomDrawingFunctor(
[](JKQTPEnhancedPainter& painter, const QRectF& bar_px, const QPointF& datapoint, Qt::Orientation orientation, JKQTPBarGraphBase* graph) {
// draw the bar (if required), pen and brush are already set properly
painter.drawRect(bar_px);
// now we can add some decoration or replace the instruction above:
// ........
}
);
// enable usage of cutom draw functor
graph->setUseCustomDrawFunctor(true);
\endcode
See \ref JKQTPlotterBarchartsCustomDrawFunctor for a detailed example.
The result may look like this:
\image html JKQTPBarVerticalGraphCustomDrawFunctor.png
\see JKQTPBarHorizontalGraph, \ref JKQTPlotterBarcharts, jkqtpstatAddHHistogram1D(), jkqtpstatAddHHistogram1DAutoranged()
/** \brief This implements a vertical bar graph with bars between \f$ y=\mbox{baseline} \f$ and \f$ y=f(x) \f$
* \ingroup jkqtplotter_barcharts
*
*
* This class draws vertical bargraphs. The basic properties are defined and documented with JKQTPBarGraphBase .
*
* The a horizontal is defined by a series of datapoints \c (x,y=f(x)) .
* Bars are then drawn fromm a baseline (often \c =0 ) to the value \c y=f(x) at each position \c x .
* Thus the class is derived from JKQTPXYBaselineGraph, which provides a baseline as well as columns for \c x and \c y values.
*
* \image html JKQTPBarVerticalGraph.png
*
* \see \ref JKQTPlotterBarcharts, jkqtpstatAddHHistogram1D(), jkqtpstatAddHHistogram1DAutoranged()
*
*
*/
class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalGraph: public JKQTPBarGraphBase {
Q_OBJECT
@ -123,9 +78,13 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalGraph: public JKQTPBarGraphBase {
* and error indicator
* \ingroup jkqtplotter_barcharts
*
* This works much the same as JKQTPBarHorizontalGraph. Here is an example output:
* This works much the same as JKQTPBarHorizontalGraph, but also draws error indicators.
* Here is an example output:
*
* \image html JKQTPBarVerticalErrorGraph.png
*
* Error indicators are defined and styled with the functions from JKQTPYGraphErrors .
*
* \see jkqtpstatAddYErrorBarGraph(), JKQTPBarVerticalGraph, \ref JKQTPlotterBarcharts
*/
class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalErrorGraph: public JKQTPBarVerticalGraph, public JKQTPYGraphErrors {
@ -178,52 +137,20 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarVerticalErrorGraph: public JKQTPBarVertical
/*! \brief This implements a horizontal bar graph with bars between \f$ x=\mbox{baseline} \f$ and \f$ x=f(y) \f$
\ingroup jkqtplotter_barcharts
This works much the same as JKQTPBarHorizontalGraph. Here is an example output:
\image html JKQTPBarHorizontalGraph.png
You can also set JKQTPBarGraphBase::FillMode::TwoColorFilling, which uses different fill styles for bars above and below
the baseline of the graph:
\image html JKQTPBarHorizontalGraphTwoColorFilling.png
If you use JKQTPBarGraphBase::FillMode::FunctorFilling you can specify the fill style by a functor, e.g.
\code
graph->setFillMode(JKQTPBarGraphBase::FillMode::FunctorFilling);
graph->setFillBrushFunctor(
[](double key, double value) {
return QBrush(QColor::fromHsvF(key/12.0, 1.0, 1.0));
}
);
\endcode
The result may look like this:
\image html JKQTPBarHorizontalGraphFunctorFilling.png
You can also completely customize the drawing by defining a custom draw functor:
\code
graph->setCustomDrawingFunctor(
[](JKQTPEnhancedPainter& painter, const QRectF& bar_px, const QPointF& datapoint, Qt::Orientation orientation, JKQTPBarGraphBase* graph) {
// draw the bar (if required), pen and brush are already set properly
painter.drawRect(bar_px);
// now we can add some decoration or replace the instruction above:
// ........
}
);
// enable usage of cutom draw functor
graph->setUseCustomDrawFunctor(true);
\endcode
See \ref JKQTPlotterBarchartsCustomDrawFunctor for a detailed example.
The result may look like this:
\image html JKQTPBarHorizontalGraphCustomDrawFunctor.png
\see \ref JKQTPlotterBarcharts, jkqtpstatAddVHistogram1D(), jkqtpstatAddVHistogram1DAutoranged()
/** \brief This implements a horizontal bar graph with bars between \f$ x=\mbox{baseline} \f$ and \f$ x=f(y) \f$
* \ingroup jkqtplotter_barcharts
*
* This class draws horizontal bargraphs. The basic properties are defined and documented with JKQTPBarGraphBase .
*
* The a horizontal is defined by a series of datapoints \c (y,x=f(y)) .
* Bars are then drawn fromm a baseline (often \c =0 ) to the value \c x=f(y) at each position \c y.
* Thus the class is derived from JKQTPXYBaselineGraph, which provides a baseline as well as columns for \c x and \c y values.
*
* \image html JKQTPBarHorizontalGraph.png
*
* \see \ref JKQTPlotterBarcharts, jkqtpstatAddVHistogram1D(), jkqtpstatAddVHistogram1DAutoranged()
*
*
*/
class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalGraph: public JKQTPBarGraphBase {
Q_OBJECT
@ -262,9 +189,13 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPBarHorizontalGraph: public JKQTPBarGraphBase {
* and error indicator
* \ingroup jkqtplotter_barcharts
*
* This works much the same as JKQTPBarHorizontalGraph. Here is an example output:
* This works much the same as JKQTPBarHorizontalGraph, but also draws error indicators.
* Here is an example output:
*
* \image html JKQTPBarHorizontalErrorGraph.png
*
* Error indicators are defined and styled by functions from JKQTPXGraphErrors.
*
* \see jkqtpstatAddXErrorBarGraph(), JKQTPBarHorizontalGraph, \ref JKQTPlotterBarcharts
*
*/

82
lib/jkqtplotter/graphs/jkqtpbarchartbase.h
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@ -33,32 +33,88 @@
/** \brief This is a base-class for all bar graphs with vertical or horizontal orientation (the orientation is implemented in dervied classes!)
* \ingroup jkqtplotter_barcharts
*
* This class plots a bargraph. This image explains the parameters:
* This class provides basic properties and functionality for plotting a bargraph.
* The latter is defined by a series of datapoints \c (x,y=f(x)) .
* Bars are then drawn fromm a baseline (often \c =0 ) to the value \c y=f(x) at each position \c x.
* Thus the class is derived from JKQTPXYBaselineGraph, which provides a baseline as well as columns for \c x and \c y values.
*
* The width of each bar is determined from its distance to its direct neighbors. It occupies a fraction "width" (JKQTPBarGraphBase::setWidth(), JKQTPBarGraphBase::getWidth() )
* of the available space. Typically \c width=0.9 so the bars occupy most space, but do not touch:
*
* \image html bargraph_basics_width.png
*
* \see JKQTPBarHorizontalGraph, JKQTPBarVerticalGraph for implementations of this virtual base class.
*
*
* \section JKQTPBarGraphBase_SideBySide several JKQTPBarGraphBase side-by-side
*
* If you draw several JKQTPBarGraphBase of the same orientation (vertical or honrizontal) into the same plot, these will by default
* overlap, if all of the use the same x-values and have the same initial width parameter.
* Typically in such a case, you want to group the bars by x-values and ensure they are drawn side-by-side and do not overlap (or overlap slightly in a controlled way).
*
* To achieve this, an addition shift parameter (JKQTPBarGraphBase::setShift(), JKQTPBarGraphBase::getShift() ) was introduced, which moves each bar inside the available space:
*
* \image html bargraph_basics.png
*
* By default the sift parameter is, so the bar is centered at the x-value. The width is 0.9,
* so adjacent bars are plotted with a small distance between them. It is possible to use these two parameters
* to plot multiple bars for every x-value, by having on JKQTPSpecialLineHorizontalGraph object per
* set of bars that belong together. For example for three bars per x-value one would set:
* By default the shift parameter (see JKQTPBarGraphBase::setShift() ) is, so the bar is centered at the x-value (i.e. \c shift=0 ).
*
* You can now use shift to separate three JKQTPBarGraphBase in a graph, by setting e.g.:
* \verbatim
* width=0.3
* shift=-0.3 / 0 / +0.3
* \endverbatim
*
* For convenience, two functions are provided (JKQTPBarGraphBase::autoscaleBarWidthAndShift(), JKQTPBarGraphBase::autoscaleBarWidthAndShiftSeparatedGroups() )
* that can be applied to any JKQTPBarGraphBase in the plot and will calculate all bargraphs' shift and width parameter
* in such a way that the graphs appear tidied up into groups as above. With these functions you don't have to calculate
* the shift and width values by hand! A call always only affects the JKQTPBarGraphBase in the plot with the same orientation
* (vertical or horizontal).
*
* This results in a bargraph, as shown here:
*
* \image html JKQTPBarVerticalGraph.png
*
* You can also set JKQTPBarGraphBase::FillMode::TwoColorFilling, which uses different fill styles for bars above and below
* the baseline of the graph:
* \section JKQTPBarGraphBaseStyling Basic Bargraph Styling
*
* There are several options that allow to style the barchraph. The most direct way is to use the setters from
* - JKQTPGraphLineStyleMixin
* - JKQTPGraphFillStyleMixin
* .
* that are available in the class and that allow directly chaning the appearance.
* It is also possibly to draw the baseline itself (\c JKQTPBarGraphBase::setDrawBaseline(true) ).
* Its style is defined in JKQTPBarGraphBase::baselineStyle() .
*
* Several convenience functions allow to set these properties in a simplified way:
* - JKQTPBarGraphBase::setFillColor_and_darkenedColor()
* .
*
* By default this class will draw boxes for each bar. They can be rounded at the corners by setting:
* - JKQTPBarGraphBase::setRectRadiusAtValue()
* - JKQTPBarGraphBase::setRectRadiusAtBaseline()
* - JKQTPBarGraphBase::setRectRadius()
* .
*
*
*
* \section JKQTPBarGraphBaseDataDependentFilling Data-Dependent Styling of Bargraphs
*
* You can also use <code>JKQTPBarGraphBase::setFillMode(JKQTPBarGraphBase::FillMode::TwoColorFilling)</code>,
* which uses different fill styles for bars above and below the baseline of the graph:
*
* \image html JKQTPBarVerticalGraphTwoColorFilling.png
*
* If you use JKQTPBarGraphBase::FillMode::FunctorFilling you can specify the fill style by a functor, e.g.
* The styles for above the baseline is set by the inherited JKQTPGraphLineStyleMixin and JKQTPGraphFillStyleMixin.
* The alternate "below" style, can be modified using
* - JKQTPBarGraphBase::fillStyleBelow()
* - the line-style is the same as from the inherited JKQTPGraphLineStyleMixin
* .
*
* If you use <code>JKQTPBarGraphBase::setFillMode(JKQTPBarGraphBase::FillMode::FunctorFilling)</code> you can specify
* the fill style (in the form of a QBruch) for each bar by a custom functor, e.g.
* \code
* graph->setFillMode(JKQTPBarGraphBase::FillMode::FunctorFilling);
* graph->setFillBrushFunctor(
* [](double key, double value) {
* [](double key, double value) -> QBrush {
* return QBrush(QColor::fromHsvF(key/12.0, 1.0, 1.0));
* }
* );
@ -68,7 +124,11 @@
*
* \image html JKQTPBarVerticalGraphFunctorFilling.png
*
* You can also completely customize the drawing by defining a custom draw functor:
*
*
* \section JKQTPBarGraphBaseCustomStyling Custom Bargraph Drawing
*
* You can also completely customize the drawing by defining a custom draw functor. This allows to draw other shapes than the typical bars:
* \code
* graph->setCustomDrawingFunctor(
* [](JKQTPEnhancedPainter& painter, const QRectF& bar_px, const QPointF& datapoint, Qt::Orientation orientation, JKQTPBarGraphBase* graph) {
@ -87,9 +147,7 @@
* The result may look like this:
*
* \image html JKQTPBarVerticalGraphCustomDrawFunctor.png
*
* \see JKQTPBarHorizontalGraph, JKQTPBarVerticalGraph
*/
class JKQTPLOTTER_LIB_EXPORT JKQTPBarGraphBase: public JKQTPXYBaselineGraph, public JKQTPGraphLineStyleMixin, public JKQTPGraphFillStyleMixin {
Q_OBJECT