JKQTPlotter trunk/v5.0.0
an extensive Qt5+Qt6 Plotter framework (including a feature-richt plotter widget, a speed-optimized, but limited variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies
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this virtual base class of the (data-column based) graphs, which are part of a JKQTPlotter plot and which use the coordinate system of the JKQTPlotter (i.e. the two coordinate axes getXAxis() and getYAxis()) as basis for the graphs More...

#include <jkqtpgraphsbase.h>

Inheritance diagram for JKQTPGraph:
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Collaboration diagram for JKQTPGraph:
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Public Member Functions

 JKQTPGraph (JKQTBasePlotter *parent=nullptr)
 class constructor
virtual ~JKQTPGraph ()=default
 default wirtual destructor
virtual bool usesColumn (int column) const
 returns true if the given column is used by the graph
Public Member Functions inherited from JKQTPPlotElement
 JKQTPPlotElement (JKQTBasePlotter *parent=nullptr)
 class constructor
virtual ~JKQTPPlotElement ()=default
 default wirtual destructor
QPointF backTransform (const QPointF &x) const
 tool routine that back-transforms a QPointF according to the parent's transformation rules (pixels --> plot coordinate)
QPointF backTransform (double x, double y) const
 tool routine that back-transforms a QPointF according to the parent's transformation rules (pixels --> plot coordinate)
double backtransformX (double x) const
 tool routine that backtransforms an x-coordinate (pixels --> plot coordinate) for this plot element, uses the axis referenced in xAxisRef
double backtransformY (double y) const
 tool routine that backtransforms a y-coordinate (pixels --> plot coordinate) for this plot element, uses the axis referenced in yAxisRef
virtual void draw (JKQTPEnhancedPainter &painter)=0
 plots the graph to the plotter object specified as parent
virtual void drawKeyMarker (JKQTPEnhancedPainter &painter, const QRectF &rect)=0
 plots a key marker inside the specified rectangle rect
virtual void drawOutside (JKQTPEnhancedPainter &painter, QRect leftSpace, QRect rightSpace, QRect topSpace, QRect bottomSpace)
 plots outside the actual plot field of view (e.g. color bars, scale bars, ...)
QImage generateKeyMarker (QSize size=QSize(16, 16))
 returns an image with a key marker inside
virtual QColor getKeyLabelColor () const =0
 returns the color to be used for the key label
virtual void getOutsideSize (JKQTPEnhancedPainter &painter, int &leftSpace, int &rightSpace, int &topSpace, int &bottomSpace)
 if the graph plots outside the actual plot field of view (e.g. color bars, scale bars, ...)
JKQTBasePlottergetParent ()
 returns the parent painter class
const JKQTBasePlottergetParent () const
 returns the parent painter class
QString getTitle () const
 returns the the title of the plot
const JKQTPCoordinateAxisgetXAxis () const
 returns the actual x-Axis-object from the parent plotter, referenced in xAxisRef
JKQTPCoordinateAxisRef getXAxisRef () const
 indicates which coordinate axis to use for coordinate transforms in x-direction
virtual bool getXMinMax (double &minx, double &maxx, double &smallestGreaterZero)=0
 get the maximum and minimum x-value of the graph
const JKQTPCoordinateAxisgetYAxis () const
 returns the actual y-Axis-object from the parent plotter, referenced in yAxisRef
JKQTPCoordinateAxisRef getYAxisRef () const
 indicates which coordinate axis to use for coordinate transforms in y-direction
virtual bool getYMinMax (double &miny, double &maxy, double &smallestGreaterZero)=0
 get the maximum and minimum y-value of the graph
virtual double hitTest (const QPointF &posSystem, QPointF *closestSpotSystem=nullptr, QString *label=nullptr, HitTestMode mode=HitTestXY) const
 returns the closest distance of the plot element to the (screen pixel) position pos, or NAN
bool isHighlighted () const
 returns whether the graph is shown in a highlighted style in the plot
bool isVisible () const
 returns whether the graph is visible in the plot
void setAxes (JKQTPCoordinateAxisRef ref)
 set the coordinate axes to use for this plot element
virtual void setParent (JKQTBasePlotter *parent)
 sets the parent painter class
virtual void setParent (JKQTPlotter *parent)
 sets the parent painter class
void setXAxis (JKQTPCoordinateAxisRef ref)
 indicates which coordinate axis to use for coordinate transforms in x-direction
void setYAxis (JKQTPCoordinateAxisRef ref)
 indicates which coordinate axis to use for coordinate transforms in y-direction
QPointF transform (const QPointF &x) const
 tool routine that transforms a QPointF according to the parent's transformation rules (plot coordinate --> pixels)
QPolygonF transform (const QPolygonF &x) const
 tool routine that transforms a QPolygonF according to the parent's transformation rules (plot coordinate --> pixels)
QPointF transform (double x, double y) const
 tool routine that transforms a QPointF according to the parent's transformation rules (plot coordinate --> pixels)
QPainterPath transformToLinePath (const QPolygonF &x) const
 tool routine that transforms a QPolygonF according to the parent's transformation rules and returns a (non-closed) path consisting of lines (plot coordinate --> pixels)
QVector< double > transformX (const QVector< double > &x) const
 transform all x-coordinates in a vector x
double transformX (double x) const
 tool routine that transforms an x-coordinate (plot coordinate --> pixels) for this plot element, uses the axis referenced in xAxisRef
QVector< double > transformY (const QVector< double > &x) const
 transform all y-coordinates in a vector x
double transformY (double y) const
 tool routine that transforms a y-coordinate (plot coordinate --> pixels) for this plot element, uses the axis referenced in yAxisRef

Protected Member Functions

virtual void drawErrorsAfter (JKQTPEnhancedPainter &)
 this function is used to plot error inidcators after plotting the graphs.
virtual void drawErrorsBefore (JKQTPEnhancedPainter &)
 this function is used to plot error inidcators before plotting the graphs.
bool getDataMinMax (int column, double &minx, double &maxx, double &smallestGreaterZero)
 get the maximum and minimum value of the given column
Protected Member Functions inherited from JKQTPPlotElement
void addHitTestData (const HitTestLocation &loc)
 clear the internal datastore for hitTest()
void addHitTestData (const QPointF &pos_, const QString &label_)
 clear the internal datastore for hitTest()
void addHitTestData (const QPointF &pos_, int index_, const QString &label_)
 clear the internal datastore for hitTest()
void addHitTestData (const QPointF &pos_, int index_=-1, const JKQTPDatastore *datastore=nullptr)
 clear the internal datastore for hitTest(), this variant uses formatHitTestDefaultLabel() to auto-generate the label
void addHitTestData (double x_, double y_, const QString &label_)
 add a new point on the graph to the internal datastore for hitTest()
void addHitTestData (double x_, double y_, int index_, const QString &label_)
 clear the internal datastore for hitTest()
void addHitTestData (double x_, double y_, int index_=-1, const JKQTPDatastore *datastore=nullptr)
 add a new point on the graph to the internal datastore for hitTest(), this variant uses formatHitTestDefaultLabel() to auto-generate the label
void clearHitTestData ()
 clear the internal datastore for hitTest()
virtual QString formatHitTestDefaultLabel (double x, double y, int index=-1, const JKQTPDatastore *datastore=nullptr) const
 tool-function for hitTest(), which formats a default label, taking into account the x- and y-position (both provided) and optionally the errors of these positions.
void reserveHitTestData (int points)
 reserve list entries for up to points graph points in the internal datastore for hitTest()
QString xFloatToString (double v, int past_comma=-1) const
 converts a x-value v into a string, taking into account the type of x-axis
QString yFloatToString (double v, int past_comma=-1) const
 converts a x-value v into a string, taking into account the type of x-axis

Friends

class JKQTPGraphErrorStyleMixin

Additional Inherited Members

Public Types inherited from JKQTPPlotElement
enum  HitTestMode {
  HitTestXY ,
  HitTestXOnly ,
  HitTestYOnly
}
 modes of operation for the function hitTest() More...
Public Slots inherited from JKQTPPlotElement
void setHighlighted (bool __value)
 sets whether the graph is drawn in a highlighted style in the plot
virtual void setTitle (const QString &__value)
 sets the title of the plot (for display in key!).
void setVisible (bool __value)
 sets whether the graph is visible in the plot
Protected Attributes inherited from JKQTPPlotElement
QVector< HitTestLocationm_hitTestData
 dataset with graph-points and associated data from the function hitTest()
JKQTBasePlotterparent
 the plotter object this object belongs to
int parentPlotStyle
 internal storage for the used parent plot style
Properties inherited from JKQTPPlotElement
bool highlighted
 indicates whether the graph is shown in a "highlghted" in the plot
QString title
 title of the plot (for display in key!). If no title is supplied, no key entry is drawn.
bool visible
 indicates whether the graph is visible in the plot
JKQTPCoordinateAxisRef xAxisRef
 indicates which coordinate axis to use for coordinate transforms in x-direction
JKQTPCoordinateAxisRef yAxisRef
 indicates which coordinate axis to use for coordinate transforms in y-direction

Detailed Description

this virtual base class of the (data-column based) graphs, which are part of a JKQTPlotter plot and which use the coordinate system of the JKQTPlotter (i.e. the two coordinate axes getXAxis() and getYAxis()) as basis for the graphs

This class adds features to work with data columns.

  • There are two properties datarange_start and datarange_end. By default they are -1 and therefore ignored. if they are != -1 the plotter only displays the datapoints with the indexes [datarange_start .. datarange_end] although there might be more data points available (range [0 .. maxDataPoints]). The datarange is cut at the full range, i.e. if datarange_end>maxDataPoints the plotter displays [datarange_start .. maxDataPoints].
  • Also there is a virtual function usesColumn() which checks whether a given column is used by this graph. Override this function in your derived graphs to indicate to JKQTPlotter / JKQTBasePlotter , which columns from the internal JKQTPDatastore are actually used. This information can be used e.g. for graph-specific data-export.
See also
Graphs

Constructor & Destructor Documentation

◆ JKQTPGraph()

JKQTPGraph::JKQTPGraph ( JKQTBasePlotter * parent = nullptr)
explicit

class constructor

◆ ~JKQTPGraph()

virtual JKQTPGraph::~JKQTPGraph ( )
virtualdefault

default wirtual destructor

Member Function Documentation

◆ drawErrorsAfter()

virtual void JKQTPGraph::drawErrorsAfter ( JKQTPEnhancedPainter & )
protectedvirtual

this function is used to plot error inidcators after plotting the graphs.

By default this function does nothing. But children of this class may overwrite it to implement drawing error indicators.

Reimplemented in JKQTPBarHorizontalErrorGraph, JKQTPBarVerticalErrorGraph, JKQTPFilledCurveXErrorGraph, JKQTPFilledCurveYErrorGraph, JKQTPImpulsesHorizontalErrorGraph, and JKQTPImpulsesVerticalErrorGraph.

◆ drawErrorsBefore()

virtual void JKQTPGraph::drawErrorsBefore ( JKQTPEnhancedPainter & )
protectedvirtual

this function is used to plot error inidcators before plotting the graphs.

By default this function does nothing. But children of this class may overwrite it to implement drawing error indicators.

Reimplemented in JKQTPXYLineErrorGraph, JKQTPXYParametrizedErrorScatterGraph, and JKQTPXYScatterErrorGraph.

◆ getDataMinMax()

bool JKQTPGraph::getDataMinMax ( int column,
double & minx,
double & maxx,
double & smallestGreaterZero )
protected

get the maximum and minimum value of the given column

The result is given in the two parameters which are call-by-reference parameters!

◆ usesColumn()

virtual bool JKQTPGraph::usesColumn ( int column) const
virtual

◆ JKQTPGraphErrorStyleMixin

friend class JKQTPGraphErrorStyleMixin
friend

The documentation for this class was generated from the following file: