This implements xy line plots. This also alows to draw symbols at the data points. More...

#include <jkqtplines.h>

Inheritance diagram for JKQTPXYLineGraph:

Collaboration diagram for JKQTPXYLineGraph:

Public Member Functions
	JKQTPXYLineGraph (JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPXYLineGraph (JKQTPlotter *parent)
	class constructor

virtual void	draw (JKQTPEnhancedPainter &painter) override
	plots the graph to the plotter object specified as parent

virtual void	drawKeyMarker (JKQTPEnhancedPainter &painter, const QRectF &rect) override
	plots a key marker inside the specified rectangle rect

bool	getDrawLine () const
	indicates whether to draw a line or not

bool	getDrawLineInForeground () const
	indicates whether to draw the line behind or above the symbols

virtual QColor	getKeyLabelColor () const override
	returns the color to be used for the key label

void	setColor (QColor c)
	set color of line and symbol

void	setDrawLine (bool __value)
	indicates whether to draw a line or not

void	setDrawLineInForeground (bool __value)
	indicates whether to draw the line behind or above the symbols

Public Member Functions inherited from JKQTPXYGraph
	JKQTPXYGraph (JKQTBasePlotter *parent=nullptr)
	class constructor

DataSortOrder	getDataSortOrder () const
	if `!=Unsorted`, the data is sorted before plotting

virtual int	getKeyColumn () const
	returns the column used as "key" for the current graph (typically this call getXColumn(), but for horizontal graphs like filled curves or barcharts it may call getYColumn() )

virtual int	getValueColumn () const
	returns the column used as "value" for the current graph (typically this call getXColumn(), but for horizontal graphs like filled curves or barcharts it may call getYColumn() )

int	getXColumn () const
	the column that contains the x-component of the datapoints

virtual bool	getXMinMax (double &minx, double &maxx, double &smallestGreaterZero) override
	get the maximum and minimum x-value of the graph

int	getYColumn () const
	the column that contains the y-component of the datapoints

virtual bool	getYMinMax (double &miny, double &maxy, double &smallestGreaterZero) override
	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 override
	Implmentation of JKQTPPlotElement::hitTest(), which searches through all graph points defined by xColumn and yColumn and returns a general x/y-label, also taking into account possibly known errors to the graphs (if it is derived from JKQTPXGraphErrorData and/or JKQTPYGraphErrorData.

virtual bool	usesColumn (int column) const override
	returns `true` if the given column is used by the graph

Public Member Functions inherited from JKQTPGraph
	JKQTPGraph (JKQTBasePlotter *parent=nullptr)
	class constructor

virtual	~JKQTPGraph ()=default
	default wirtual destructor

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	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 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, ...)

JKQTBasePlotter *	getParent ()
	returns the parent painter class

const JKQTBasePlotter *	getParent () const
	returns the parent painter class

QString	getTitle () const
	returns the the title of the plot

const JKQTPCoordinateAxis *	getXAxis () 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

const JKQTPCoordinateAxis *	getYAxis () 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

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

Public Member Functions inherited from JKQTPGraphLineStyleMixin
	JKQTPGraphLineStyleMixin ()
	class constructor

virtual	~JKQTPGraphLineStyleMixin ()

QColor	getHighlightingLineColor () const
	get the color of the graph line when highlighted

QPen	getHighlightingLinePen (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties

QPen	getHighlightingLinePenForRects (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties, suitable for drawing rectangle with sharp corners

QPen	getKeyLinePen (JKQTPEnhancedPainter &painter, const QRectF &rect, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties, but uses getKeyLineWidthPx() for the width, i.e. constructs a pen for drawing lines in key-symbols

double	getKeyLineWidthPx (JKQTPEnhancedPainter &painter, const QRectF &keyRect, const JKQTBasePlotter *parent) const
	returns the linewidth for drawing lines in a key entry with keyRect for the symbol, using painter and parent .

QBrush	getLineBrush () const
	gets the brush used to fill the line area

Qt::PenCapStyle	getLineCapStyle () const
	gets the cap style

QColor	getLineColor () const
	get the color of the graph line

qreal	getLineDashOffset () const
	returns the dash offset for a custom dash style

QVector< qreal >	getLineDashPattern () const
	gets the dash pattern for a custom dash style

Qt::PenJoinStyle	getLineJoinStyle () const
	returns the join style

QPen	getLinePen (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties

QPen	getLinePenForRects (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties, suitable for drawing rectangles with sharp edges

Qt::PenStyle	getLineStyle () const
	get the style of the graph line

double	getLineWidth () const
	get the line width of the graph line (in pt)

void	initLineStyle (JKQTBasePlotter *parent, int &parentPlotStyle, JKQTPPlotStyleType styletype=JKQTPPlotStyleType::Default)
	initiaize the line style (from the parent plotter)

void	setHighlightingLineColor (const QColor &__value)
	set the color of the graph line when highlighted

void	setHighlightingLineColor (const QColor &__value, double alpha)
	set the color of the graph line when highlighted

void	setLineBrush (const QBrush &style)
	sets the brush used to fill the line area

void	setLineCapStyle (Qt::PenCapStyle style)
	sets the cap style

void	setLineColor (const QColor &__value)
	set the color of the graph line

void	setLineColor (const QColor &__value, double alpha)
	set the color of the graph line

void	setLineColorInvertedFrom (QColor __noninvertedColor)
	sets the line-color as an inverted version of the given color

void	setLineDashOffset (qreal offset)
	sets the dash offset for a custom dash style

void	setLineDashPattern (const QVector< qreal > &pattern)
	sets the dash pattern for a custom dash style

void	setLineJoinStyle (Qt::PenJoinStyle style)
	sets the join style

void	setLineStyle (Qt::PenStyle __value)
	set the style of the graph line

void	setLineWidth (double __value)
	set the line width of the graph line (in pt)

Public Member Functions inherited from JKQTPGraphSymbolStyleMixin
	JKQTPGraphSymbolStyleMixin ()
	class constructor

virtual	~JKQTPGraphSymbolStyleMixin ()

QColor	getSymbolColor () const
	set the color of the graph symbols

QColor	getSymbolFillColor () const
	set the color of filling of the graph symbols

QString	getSymbolFontName () const
	get the font to be used for character symbols `JKQTPCharacterSymbol+QChar`('').unicode()

double	getSymbolLineWidth () const
	get the line width of the graph symbol outline (in pt)

double	getSymbolSize () const
	get the size (=diameter in pt) of the graph symbol (in pt)

JKQTPGraphSymbols	getSymbolType () const
	get the type of the graph symbol

void	initSymbolStyle (JKQTBasePlotter *parent, int &parentPlotStyle, JKQTPPlotStyleType styletype=JKQTPPlotStyleType::Default)
	initiaize the symbol style (from the parent plotter)

void	setSymbolAlpha (double alpha)
	set alpha-value of symbol outline and filling

void	setSymbolColor (const QColor &__value)
	set the color of the graph symbols

void	setSymbolColor (const QColor &__value, double alpha)
	set the color of the graph symbols

void	setSymbolFillColor (const QColor &__value)
	set the color of filling of the graph symbols

void	setSymbolFillColor (const QColor &__value, double alpha)
	set the color of filling of the graph symbols

void	setSymbolFontName (const QString &__value)
	set the font to be used for character symbols `JKQTPCharacterSymbol+QChar`('').unicode()

void	setSymbolLineWidth (double __value)
	set the line width of the graph symbol outline (in pt)

void	setSymbolSize (double __value)
	set the size (=diameter in pt) of the graph symbol (in pt)

void	setSymbolType (JKQTPGraphSymbols __value)
	set the type of the graph symbol

Public Member Functions inherited from JKQTPGraphLinesCompressionMixin
	JKQTPGraphLinesCompressionMixin ()
	class constructor

virtual	~JKQTPGraphLinesCompressionMixin ()

double	getNonvisibleLineCompressionAgressiveness () const

bool	getUseNonvisibleLineCompression () const

void	setNonvisibleLineCompressionAgressiveness (double Agressiveness)

void	setUseNonvisibleLineCompression (bool _useNonvisibleLineCompression)

Protected Attributes
bool	drawLine
	indicates whether to draw a line or not

bool	drawLineInForeground
	indicates whether to draw the line behind or above the symbols

Protected Attributes inherited from JKQTPXYGraph
QVector< int >	sortedIndices
	this array contains the order of indices, in which to access the data in the data columns

Protected Attributes inherited from JKQTPPlotElement
QVector< HitTestLocation >	m_hitTestData
	dataset with graph-points and associated data from the function hitTest()

JKQTBasePlotter *	parent
	the plotter object this object belongs to

int	parentPlotStyle
	internal storage for the used parent plot style

Additional Inherited Members
Public Types inherited from JKQTPXYGraph
enum	DataSortOrder { Unsorted =0 , SortedX =1 , SortedY =2 }
	specifies how to sort the data in a JKQTPXYGraph before drawing More...

Public Types inherited from JKQTPPlotElement
enum	HitTestMode { HitTestXY , HitTestXOnly , HitTestYOnly }
	modes of operation for the function hitTest() More...

Public Slots inherited from JKQTPXYGraph
void	setDataSortOrder (DataSortOrder __value)
	if `!=Unsorted`, the data is sorted before plotting

void	setDataSortOrder (int __value)
	if `!=Unsorted`, the data is sorted before plotting

virtual void	setKeyColumn (int __value)
	sets the column used as "key" for the current graph (typically this call setXColumn(), but for horizontal graphs like filled curves or barcharts it may call setYColumn() )

virtual void	setValueColumn (int __value)
	sets the column used as "value" for the current graph (typically this call setXColumn(), but for horizontal graphs like filled curves or barcharts it may call setYColumn() )

void	setXColumn (int __value)
	the column that contains the x-component of the datapoints

void	setXColumn (size_t __value)
	the column that contains the x-component of the datapoints

void	setXYColumns (int xCol, int yCol)
	sets xColumn and yColumn at the same time

void	setXYColumns (QPair< int, int > xyColPair)
	sets xColumn and yColumn at the same time

void	setXYColumns (QPair< size_t, size_t > xyColPair)
	sets xColumn and yColumn at the same time

void	setXYColumns (size_t xCol, size_t yCol)
	sets xColumn and yColumn at the same time

void	setYColumn (int __value)
	the column that contains the y-component of the datapoints

void	setYColumn (size_t __value)
	the column that contains the y-component of the datapoints

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 Member Functions inherited from JKQTPXYGraph
int	getDataIndex (int i) const
	returns the index of the i-th datapoint (where i is an index into the SORTED datapoints)

virtual bool	getIndexRange (int &imin, int &imax) const
	determines the range of row indexes available in the data columns of this graph

virtual void	intSortData ()
	sorts data according to the specified criterion in sortData ... The result is stored as a index-map in sorted Indices

Protected Member Functions inherited from JKQTPGraph
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

Protected Member Functions inherited from JKQTPGraphSymbolStyleMixin
double	getKeySymbolLineWidthPx (JKQTPEnhancedPainter &painter, const QRectF &keyRect, const JKQTBasePlotter *parent, double maxSymbolSizeFracton=0.9) const
	returns the symbol linewidth for drawing symbols in a key entry with keyRect for the symbol, using painter and parent . maxSymbolSizeFracton specifies the maximum fraction of keyRect to be used for the symbol.

double	getKeySymbolSizePx (JKQTPEnhancedPainter &painter, const QRectF &keyRect, const JKQTBasePlotter *parent, double maxSymbolSizeFracton=0.9) const
	returns the symbol size for drawing symbols in a key entry with keyRect for the symbol, using painter and parent . maxSymbolSizeFracton specifies the maximum fraction of keyRect to be used for the symbol.

QBrush	getSymbolBrush (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties

QFont	getSymbolFont () const
	generate a QFont for darwing symbols

QPen	getSymbolPen (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties

void	plotStyledSymbol (JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, double x, double y) const
	plot a symbol at location x,y (in painter coordinates), using the current style

void	plotStyledSymbol (JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, double x, double y, double symbolSize) const
	plot a symbol at location x,y (in painter coordinates), using the current style

void	plotStyledSymbol (JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, double x, double y, JKQTPGraphSymbols type) const
	plot a symbol at location x,y (in painter coordinates), using the current style

void	plotStyledSymbol (JKQTBasePlotter *parent, JKQTPEnhancedPainter &painter, double x, double y, QColor color, QColor fillColor) const
	plot a symbol at location x,y (in painter coordinates), using the current style

Properties inherited from JKQTPXYGraph
DataSortOrder	sortData
	if `!=Unsorted`, the data is sorted before plotting

int	xColumn
	the column that contains the x-component of the datapoints

int	yColumn
	the column that contains the y-component of the datapoints

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

Properties inherited from JKQTPGraphLineStyleMixin
QColor	highlightingLineColor

QColor	lineColor

Qt::PenStyle	lineStyle

double	lineWidth

Properties inherited from JKQTPGraphSymbolStyleMixin
QColor	symbolColor

QColor	symbolFillColor

QString	symbolFontName

double	symbolLineWidth

double	symbolSize

JKQTPGraphSymbols	symbolType

Properties inherited from JKQTPGraphLinesCompressionMixin
double	nonvisibleLineCompressionAgressiveness

bool	useNonvisibleLineCompression

Detailed Description

This implements xy line plots. This also alows to draw symbols at the data points.

Note: This classes can (and does by default) apply a line-compression strategy that improves plotting speed but reduces accuracy a bit. See JKQTPGraphLinesCompressionMixin for details.

See also: Example (JKQTPlotter): Advanced Line and Fill Styling, Example (JKQTPlotter): Very simple line-graph, Example (JKQTPlotter): Line Graph with Different Symbols and Line Styles, jkqtpstatAddVKDE1D(), jkqtpstatAddVKDE1DAutoranged(), jkqtpstatAddHKDE1D(), jkqtpstatAddHKDE1DAutoranged(), JKQTPGraphLinesCompressionMixin

Constructor & Destructor Documentation

◆ JKQTPXYLineGraph() [1/2]

JKQTPXYLineGraph::JKQTPXYLineGraph ( JKQTBasePlotter * parent = nullptr )

explicit

class constructor

◆ JKQTPXYLineGraph() [2/2]

JKQTPXYLineGraph::JKQTPXYLineGraph ( JKQTPlotter * parent )

class constructor

Member Function Documentation

◆ draw()

virtual void JKQTPXYLineGraph::draw ( JKQTPEnhancedPainter & painter )

overridevirtual

plots the graph to the plotter object specified as parent

Implements JKQTPPlotElement.

◆ drawKeyMarker()

virtual void JKQTPXYLineGraph::drawKeyMarker	(	JKQTPEnhancedPainter &	painter,
		const QRectF &	rect
	)

overridevirtual

plots a key marker inside the specified rectangle rect

Implements JKQTPPlotElement.

◆ getDrawLine()

bool JKQTPXYLineGraph::getDrawLine ( ) const

indicates whether to draw a line or not

◆ getDrawLineInForeground()

bool JKQTPXYLineGraph::getDrawLineInForeground ( ) const

indicates whether to draw the line behind or above the symbols

◆ getKeyLabelColor()

virtual QColor JKQTPXYLineGraph::getKeyLabelColor ( ) const

overridevirtual

returns the color to be used for the key label

Implements JKQTPPlotElement.

◆ setColor()

void JKQTPXYLineGraph::setColor ( QColor c )

set color of line and symbol

◆ setDrawLine()

void JKQTPXYLineGraph::setDrawLine ( bool __value )

indicates whether to draw a line or not

◆ setDrawLineInForeground()

void JKQTPXYLineGraph::setDrawLineInForeground ( bool __value )

indicates whether to draw the line behind or above the symbols

Member Data Documentation

◆ drawLine

bool JKQTPXYLineGraph::drawLine

protected

indicates whether to draw a line or not

◆ drawLineInForeground

bool JKQTPXYLineGraph::drawLineInForeground

protected

indicates whether to draw the line behind or above the symbols

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

jkqtplines.h

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ JKQTPXYLineGraph() [1/2]

◆ JKQTPXYLineGraph() [2/2]

Member Function Documentation

◆ draw()

◆ drawKeyMarker()

◆ getDrawLine()

◆ getDrawLineInForeground()

◆ getKeyLabelColor()

◆ setColor()

◆ setDrawLine()

◆ setDrawLineInForeground()

Member Data Documentation

◆ drawLine

◆ drawLineInForeground