This JKQTPGeometricPlotElement is used to draw an infinite line. More...

#include <jkqtpgeolines.h>

Inheritance diagram for JKQTPGeoInfiniteLine:

Collaboration diagram for JKQTPGeoInfiniteLine:

Public Member Functions
	JKQTPGeoInfiniteLine (JKQTBasePlotter *parent, double x, double y, double dx, double dy)
	class constructor

	JKQTPGeoInfiniteLine (JKQTPlotter *parent, double x, double y, double dx, double dy)
	class constructor

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

double	getDx () const
	x-component of the slope of the line

double	getDy () const
	y-component of the slope of the line

QPointF	getP () const
	return point (x,y) on the line as QPointF

bool	getTwoSided () const
	indicates whether the line ends at the given point (false, default), or is infinite in both directions (true)

double	getX () const
	x-coordinate of a point on the line

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

double	getY () const
	y-coordinate of a point on the line

virtual bool	getYMinMax (double &miny, double &maxy, double &smallestGreaterZero) override
	get the maximum and minimum y-value of the graph

void	setDx (double __value)
	x-component of the slope of the line

void	setDy (double __value)
	y-component of the slope of the line

void	setP (const QPointF &p)
	set point (x,y) on the line as QPointF

void	setTwoSided (bool __value)
	indicates whether the line ends at the given point (false, default), or is infinite in both directions (true)

void	setX (double __value)
	x-coordinate of a point on the line

void	setY (double __value)
	y-coordinate of a point on the line

Public Member Functions inherited from JKQTPGeoBaseDecoratedHeadLine
	JKQTPGeoBaseDecoratedHeadLine (JKQTBasePlotter *parent, DrawMode drawMode=DrawAsGraphicElement)
	class contructor

	JKQTPGeoBaseDecoratedHeadLine (JKQTPLineDecoratorStyle headStyle, JKQTBasePlotter *parent, DrawMode drawMode=DrawAsGraphicElement)
	class contructor

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

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

virtual void	setAlpha (float alpha)
	sets the alpha-channel of the color (i.e. its transparency)

virtual void	setColor (QColor c)
	set line color

virtual void	setStyle (QColor color, double lineWidth)
	set several of the style properties with one call

virtual void	setStyle (QColor color, double lineWidth, Qt::PenStyle style)
	set several of the style properties with one call

virtual void	setStyle (QColor color, Qt::PenStyle style)
	set several of the style properties with one call

Public Member Functions inherited from JKQTPGeometricPlotElement
	JKQTPGeometricPlotElement (DrawMode drawMode=DrawAsGraphicElement, JKQTBasePlotter *parent=nullptr)
	class constructor

virtual	~JKQTPGeometricPlotElement ()
	default wirtual destructor

DrawMode	getDrawMode () const
	indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves

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

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

Public Member Functions inherited from JKQTPGraphDecoratedHeadLineStyleMixin
	JKQTPGraphDecoratedHeadLineStyleMixin ()
	class constructor

virtual	~JKQTPGraphDecoratedHeadLineStyleMixin ()

double	calcHeadDecoratorSize (double line_width) const
	calculates the tail decorator size from the line width line_width, using m_headDecoratorSizeFactor and a non-linear scaling function

double	getHeadDecoratorSizeFactor () const
	head decorator size-factor, used to calculate the size of the arrow from the line width

JKQTPLineDecoratorStyle	getHeadDecoratorStyle () const
	get the head decorator style

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

void	setHeadDecoratorSizeFactor (const double &__value)
	head decorator size-factor, used to calculate the size of the arrow from the line width

void	setHeadDecoratorStyle (const JKQTPLineDecoratorStyle &__value)
	set the head decorator style

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)

Protected Attributes
double	dx
	x-component of the slope of the line

double	dy
	y-component of the slope of the line

bool	two_sided
	indicates whether the line ends at the given point (false, default), or is infinite in both directions (true)

double	x
	x-coordinate of a point on the line

double	y
	y-coordinate of a point on the line

Protected Attributes inherited from JKQTPGeometricPlotElement
DrawMode	m_drawMode
	indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves

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 JKQTPGeometricPlotElement
enum	DrawMode { DrawAsGraphicElement , DrawAsMathematicalCurve }
	indicates how to draw the geometric object More...

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

Public Slots inherited from JKQTPGeometricPlotElement
void	setDrawMode (DrawMode mode)
	indicated whether to draw lines as graphic elements (even on non-linear coordinate systems), or as mathematically correct curves

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 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

Properties inherited from JKQTPGeometricPlotElement
DrawMode	drawMode

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 JKQTPGraphDecoratedHeadLineStyleMixin
double	headDecoratorSizeFactor

JKQTPLineDecoratorStyle	headDecoratorStyle

Properties inherited from JKQTPGraphLineStyleMixin
QColor	highlightingLineColor

QColor	lineColor

Qt::PenStyle	lineStyle

double	lineWidth

Detailed Description

This JKQTPGeometricPlotElement is used to draw an infinite line.

an infinite line has a starting point and then goes on in a given direction until the end of the plotting range.

Note: This class support JKQTPGeometricPlotElement::DrawMode::DrawAsMathematicalCurve. If set, and non-linear axes are chosen, the line is drawn as a curves, instead of straight a straight line. In the mode JKQTPGeometricPlotElement::DrawMode::DrawAsGraphicElement the line is drawn as a straight line.

You can add a decorator to the head of the line (i.e. the given start point (x,y) ) iff this line is one-sided, i.e. two_sided ==false .

See also: Example (JKQTPlotter): Plotting Geometric Objects and Example (JKQTPlotter): Plotting Arrows

Constructor & Destructor Documentation

◆ JKQTPGeoInfiniteLine() [1/2]

JKQTPGeoInfiniteLine::JKQTPGeoInfiniteLine	(	JKQTBasePlotter *	parent,
		double	x,
		double	y,
		double	dx,
		double	dy
	)

class constructor

Parameters

parent	the parent plotter object
x	x-coordinate of start point of line
y	y-coordinate of start point of line
dx	x-direction of the line
dy	y-direction of the line

◆ JKQTPGeoInfiniteLine() [2/2]

JKQTPGeoInfiniteLine::JKQTPGeoInfiniteLine	(	JKQTPlotter *	parent,
		double	x,
		double	y,
		double	dx,
		double	dy
	)

class constructor

Parameters

parent	the parent plotter object
x	x-coordinate of start point of line
y	y-coordinate of start point of line
dx	x-direction of the line
dy	y-direction of the line

Member Function Documentation

◆ draw()

virtual void JKQTPGeoInfiniteLine::draw ( JKQTPEnhancedPainter & painter )

overridevirtual

plots the graph to the plotter object specified as parent

Note: This function support JKQTPGeometricPlotElement::DrawMode::DrawAsMathematicalCurve. If set, and non-linear axes are chosen, the line will possibly be represented as a curve, instead of a straight line.

Implements JKQTPPlotElement.

◆ getDx()

double JKQTPGeoInfiniteLine::getDx ( ) const

x-component of the slope of the line

◆ getDy()

double JKQTPGeoInfiniteLine::getDy ( ) const

y-component of the slope of the line

◆ getP()

QPointF JKQTPGeoInfiniteLine::getP ( ) const

return point (x,y) on the line as QPointF

◆ getTwoSided()

bool JKQTPGeoInfiniteLine::getTwoSided ( ) const

indicates whether the line ends at the given point (false, default), or is infinite in both directions (true)

◆ getX()

double JKQTPGeoInfiniteLine::getX ( ) const

x-coordinate of a point on the line

◆ getXMinMax()

virtual bool JKQTPGeoInfiniteLine::getXMinMax	(	double &	minx,
		double &	maxx,
		double &	smallestGreaterZero
	)

overridevirtual

get the maximum and minimum x-value of the graph

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

Parameters

[out]	minx	minimal x-value used in the graph
[out]	maxx	maximal x-value used in the graph
[out]	smallestGreaterZero	the smalles x-value in the graph, which is larger than 0 (this is used in auto-sizing for logarithmic axes)

Returns: true on success, i.e. if there were datapoints in the plot, or false on failure (e.g. when the graph is empty)

Implements JKQTPPlotElement.

◆ getY()

double JKQTPGeoInfiniteLine::getY ( ) const

y-coordinate of a point on the line

◆ getYMinMax()

virtual bool JKQTPGeoInfiniteLine::getYMinMax	(	double &	miny,
		double &	maxy,
		double &	smallestGreaterZero
	)

overridevirtual

get the maximum and minimum y-value of the graph

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

Parameters

[out]	miny	minimal y-value used in the graph
[out]	maxy	maximal y-value used in the graph
[out]	smallestGreaterZero	the smalles y-value in the graph, which is larger than 0 (this is used in auto-sizing for logarithmic axes)

Returns: true on success, i.e. if there were datapoints in the plot, or false on failure (e.g. when the graph is empty)

Implements JKQTPPlotElement.

◆ setDx()

void JKQTPGeoInfiniteLine::setDx ( double __value )

x-component of the slope of the line

◆ setDy()

void JKQTPGeoInfiniteLine::setDy ( double __value )

y-component of the slope of the line

◆ setP()

void JKQTPGeoInfiniteLine::setP ( const QPointF & p )

set point (x,y) on the line as QPointF

◆ setTwoSided()

void JKQTPGeoInfiniteLine::setTwoSided ( bool __value )

indicates whether the line ends at the given point (false, default), or is infinite in both directions (true)

◆ setX()

void JKQTPGeoInfiniteLine::setX ( double __value )

x-coordinate of a point on the line

◆ setY()

void JKQTPGeoInfiniteLine::setY ( double __value )

y-coordinate of a point on the line

Member Data Documentation

◆ dx

double JKQTPGeoInfiniteLine::dx

protected

x-component of the slope of the line

◆ dy

double JKQTPGeoInfiniteLine::dy

protected

y-component of the slope of the line

◆ two_sided

bool JKQTPGeoInfiniteLine::two_sided

protected

indicates whether the line ends at the given point (false, default), or is infinite in both directions (true)

◆ x

double JKQTPGeoInfiniteLine::x

protected

x-coordinate of a point on the line

◆ y

double JKQTPGeoInfiniteLine::y

protected

y-coordinate of a point on the line

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

jkqtpgeolines.h

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ JKQTPGeoInfiniteLine() [1/2]

◆ JKQTPGeoInfiniteLine() [2/2]

Member Function Documentation

◆ draw()

◆ getDx()

◆ getDy()

◆ getP()

◆ getTwoSided()

◆ getX()

◆ getXMinMax()

◆ getY()

◆ getYMinMax()

◆ setDx()

◆ setDy()

◆ setP()

◆ setTwoSided()

◆ setX()

◆ setY()

Member Data Documentation

◆ dx

◆ dy

◆ two_sided

◆ x

◆ y