This virtual JKQTPGraph descendent extends JKQTPXYGraph with two additional columns that encode for a vector starting at (x,y), i.e. either two distances along the x- and y-axis ( $\Delta x, \Delta y$ ), or a rotation angle $\alpha$ and a vector length $\l$ . More...

#include <jkqtpgraphsbase.h>

Inheritance diagram for JKQTPXYAndVectorGraph:

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Collaboration diagram for JKQTPXYAndVectorGraph:

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Public Types
enum	VectorDataLayout { DeltaXDeltaYLayout , AngleAndLengthLayout , DefaultVectorDataLayout =DeltaXDeltaYLayout }
	values from this enum indicates how to interpret the data columns provided to this graph More...
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
void	setAngleAndLengthColumn (int colAngle, int colLength)
	det angleColumn and lengthColumn column at the same time! ALso ensures that vectorDataLayout is set accordingly.
void	setAngleColumn (int col)
	the column that contains the rotation angle [in radian]
void	setDxColumn (int col)
	the column that contains the delta along the x-axis.
void	setDxDyColumn (int colDx, int colDy)
	det dxColumn and dyColumn column at the same time! ALso ensures that vectorDataLayout is set accordingly.
void	setDyColumn (int col)
	the column that contains the delta along the y-axis.
void	setLengthColumn (int col)
	the column that contains the vector length
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

Public Member Functions
	JKQTPXYAndVectorGraph (JKQTBasePlotter *parent=nullptr)
	class constructor
virtual QString	formatHitTestDefaultLabel (double x, double y, int index=-1, const JKQTPDatastore *datastore=nullptr) const override
	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.
int	getAngleColumn () const
	the column that contains the rotation angle [in radian]
int	getDxColumn () const
	the column that contains the delta along the x-axis.
int	getDyColumn () const
	the column that contains the delta along the y-axis.
int	getLengthColumn () const
	the column that contains the vector length
VectorDataLayout	getVectorDataLayout () const
	indicates, which column pairs to use (dxColumn, dyColumn), (angleColumn, lengthColumn), ...
virtual bool	getXMinMax (double &minx, double &maxx, double &smallestGreaterZero) override
	get the maximum and minimum x-value of the graph
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 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
int	getYColumn () const
	the column that contains the y-component of the datapoints
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	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, ...)
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

Protected Member Functions
virtual bool	getIndexRange (int &imin, int &imax) const override
	determines the range of row indexes available in the data columns of this graph
double	getVectorAngle (int i) const
QPointF	getVectorDxDy (int i) const
	this function interprets vectorDataLayout together with (dxColumn, dyColumn) or (angleColumn, lengthColumn) or ... and returns the i -th vectors $\Delta x, \Delta y$
double	getVectorMagnitude (int i) const
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 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()
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

Static Protected Member Functions
static double	getVectorAngle (const QPointF &v)
	calculates the rotation angle (3 o'clock is 0) in radians $[0...2\pi]$ of a vector v
static double	getVectorMagnitude (const QPointF &v)
	calculates the magnitude/length of a vector v

Properties
int	angleColumn
	the column that contains the rotation angle [in radian]
int	dxColumn
	the column that contains the delta along the x-axis.
int	dyColumn
	the column that contains the delta along the y-axis.
int	lengthColumn
	the column that contains the vector length
VectorDataLayout	vectorDataLayout
	indicates, which column pairs to use (dxColumn, dyColumn), (angleColumn, lengthColumn), ...
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

Additional Inherited Members
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

Detailed Description

This virtual JKQTPGraph descendent extends JKQTPXYGraph with two additional columns that encode for a vector starting at (x,y), i.e. either two distances along the x- and y-axis ( $\Delta x, \Delta y$ ), or a rotation angle $\alpha$ and a vector length $\l$ .

See also: JKQTPVectorFieldGraph, JKQTPParametrizedVectorFieldGraph

Member Enumeration Documentation

◆ VectorDataLayout

enum JKQTPXYAndVectorGraph::VectorDataLayout

values from this enum indicates how to interpret the data columns provided to this graph

Enumerator
DeltaXDeltaYLayout	Data is given in the form of two vector components (along x- and y-axis)
AngleAndLengthLayout	Data is given in the form of an angle and a length that describe the vector together.
DefaultVectorDataLayout

Constructor & Destructor Documentation

◆ JKQTPXYAndVectorGraph()

JKQTPXYAndVectorGraph::JKQTPXYAndVectorGraph ( JKQTBasePlotter * parent = nullptr )

class constructor

Member Function Documentation

◆ formatHitTestDefaultLabel()

virtual QString JKQTPXYAndVectorGraph::formatHitTestDefaultLabel	(	double	x,
		double	y,
		int	index = -1,
		const JKQTPDatastore *	datastore = nullptr ) const

overridevirtual

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.

Parameters

x	x-position of the datapoint in system coordinates
y	y-position of the datapoint in system coordinates
index	the index of the data point in the associated data column(s), or -1 (optional!)
datastore	The datastore to read error data from (optional!)

Returns: a LaTeX formatted label

Reimplemented from JKQTPPlotElement.

◆ getAngleColumn()

int JKQTPXYAndVectorGraph::getAngleColumn ( ) const

the column that contains the rotation angle [in radian]

An angle of 0 means a right-pointing vector and angle is measured count-clockwise, so angle $\alpha$ and length can be converted to $\Delta x, \Delta y$ via:

$\Delta x = l\cdot \cos\alpha$

$\Delta y = l\cdot \sin\alpha$

Note that these calculations are performed in the coordinate-axis-space, NOT in screen pixel space!

Note: Note that this column is only used, when vectorDataLayout is set accordingly to AngleAndLengthLayout! Also note that Setter-functions (e.g. setAngleColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setAngleColumn(), setLengthColumn(), getAngleColumn(), getLengthColumn()

◆ getDxColumn()

int JKQTPXYAndVectorGraph::getDxColumn ( ) const

the column that contains the delta along the x-axis.

Note: Note that this column is only used, when vectorDataLayout is set accordingly to DeltaXDeltaYLayout! Also note that Setter-functions (e.g. setDxColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setDxColumn(), setDyColumn(), setDxDyColumn(), getDxColumn(), getDyColumn()

◆ getDyColumn()

int JKQTPXYAndVectorGraph::getDyColumn ( ) const

the column that contains the delta along the y-axis.

Note: Note that this column is only used, when vectorDataLayout is set accordingly to DeltaXDeltaYLayout! Also note that Setter-functions (e.g. setDyColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setDxColumn(), setDyColumn(), setDxDyColumn(), getDxColumn(), getDyColumn()

◆ getIndexRange()

virtual bool JKQTPXYAndVectorGraph::getIndexRange	(	int &	imin,
		int &	imax ) const

overrideprotectedvirtual

determines the range of row indexes available in the data columns of this graph

Parameters

[out]	imin	first usable row-index
[out]	imax	last usable row-index

Returns: true on success and false if the information is not available

Reimplemented from JKQTPXYGraph.

◆ getLengthColumn()

int JKQTPXYAndVectorGraph::getLengthColumn ( ) const

the column that contains the vector length

An angle of 0 means a right-pointing vector and angle is measured count-clockwise, so angle $\alpha$ and length can be converted to $\Delta x, \Delta y$ via:

$\Delta x = l\cdot \cos\alpha$

$\Delta y = l\cdot \sin\alpha$

Note that these calculations are performed in the coordinate-axis-space, NOT in screen pixel space!

Note: Note that this column is only used, when vectorDataLayout is set accordingly to AngleAndLengthLayout! Also note that Setter-functions (e.g. setAngleColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setAngleColumn(), setLengthColumn(), getAngleColumn(), getLengthColumn()

◆ getVectorAngle() [1/2]

double JKQTPXYAndVectorGraph::getVectorAngle ( const QPointF & v )

inlinestaticprotected

calculates the rotation angle (3 o'clock is 0) in radians $[0...2\pi]$ of a vector v

◆ getVectorAngle() [2/2]

double JKQTPXYAndVectorGraph::getVectorAngle ( int i ) const

inlineprotected

◆ getVectorDataLayout()

VectorDataLayout JKQTPXYAndVectorGraph::getVectorDataLayout ( ) const

indicates, which column pairs to use (dxColumn, dyColumn), (angleColumn, lengthColumn), ...

◆ getVectorDxDy()

QPointF JKQTPXYAndVectorGraph::getVectorDxDy ( int i ) const

protected

this function interprets vectorDataLayout together with (dxColumn, dyColumn) or (angleColumn, lengthColumn) or ... and returns the i -th vectors $\Delta x, \Delta y$

◆ getVectorMagnitude() [1/2]

double JKQTPXYAndVectorGraph::getVectorMagnitude ( const QPointF & v )

inlinestaticprotected

calculates the magnitude/length of a vector v

◆ getVectorMagnitude() [2/2]

double JKQTPXYAndVectorGraph::getVectorMagnitude ( int i ) const

inlineprotected

◆ getXMinMax()

virtual bool JKQTPXYAndVectorGraph::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)

Reimplemented from JKQTPXYGraph.

◆ getYMinMax()

virtual bool JKQTPXYAndVectorGraph::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)

Reimplemented from JKQTPXYGraph.

◆ hitTest()

virtual double JKQTPXYAndVectorGraph::hitTest	(	const QPointF &	posSystem,
		QPointF *	closestSpotSystem = nullptr,
		QString *	label = nullptr,
		HitTestMode	mode = HitTestXY ) const

overridevirtual

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.

Note: This function first checks whether JKQTPPlotElement::hitTest() returns any result, so you can use the basic implementation in JKQTPPlotElement to override the behaviour here, by simply calling addHitTestData() during your draw() implementation

See also: See JKQTPPlotElement::hitTest() for details on the function definition!

Reimplemented from JKQTPXYGraph.

◆ setAngleAndLengthColumn

void JKQTPXYAndVectorGraph::setAngleAndLengthColumn	(	int	colAngle,
		int	colLength )

slot

det angleColumn and lengthColumn column at the same time! ALso ensures that vectorDataLayout is set accordingly.

See also: angleColumn, lengthColumn

◆ setAngleColumn

void JKQTPXYAndVectorGraph::setAngleColumn ( int col )

slot

the column that contains the rotation angle [in radian]

An angle of 0 means a right-pointing vector and angle is measured count-clockwise, so angle $\alpha$ and length can be converted to $\Delta x, \Delta y$ via:

$\Delta x = l\cdot \cos\alpha$

$\Delta y = l\cdot \sin\alpha$

Note that these calculations are performed in the coordinate-axis-space, NOT in screen pixel space!

Note: Note that this column is only used, when vectorDataLayout is set accordingly to AngleAndLengthLayout! Also note that Setter-functions (e.g. setAngleColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setAngleColumn(), setLengthColumn(), getAngleColumn(), getLengthColumn()

◆ setDxColumn

void JKQTPXYAndVectorGraph::setDxColumn ( int col )

slot

the column that contains the delta along the x-axis.

Note: Note that this column is only used, when vectorDataLayout is set accordingly to DeltaXDeltaYLayout! Also note that Setter-functions (e.g. setDxColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setDxColumn(), setDyColumn(), setDxDyColumn(), getDxColumn(), getDyColumn()

◆ setDxDyColumn

void JKQTPXYAndVectorGraph::setDxDyColumn	(	int	colDx,
		int	colDy )

slot

det dxColumn and dyColumn column at the same time! ALso ensures that vectorDataLayout is set accordingly.

See also: dxColumn, dyColumn

◆ setDyColumn

void JKQTPXYAndVectorGraph::setDyColumn ( int col )

slot

the column that contains the delta along the y-axis.

Note: Note that this column is only used, when vectorDataLayout is set accordingly to DeltaXDeltaYLayout! Also note that Setter-functions (e.g. setDyColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setDxColumn(), setDyColumn(), setDxDyColumn(), getDxColumn(), getDyColumn()

◆ setLengthColumn

void JKQTPXYAndVectorGraph::setLengthColumn ( int col )

slot

the column that contains the vector length

An angle of 0 means a right-pointing vector and angle is measured count-clockwise, so angle $\alpha$ and length can be converted to $\Delta x, \Delta y$ via:

$\Delta x = l\cdot \cos\alpha$

$\Delta y = l\cdot \sin\alpha$

Note that these calculations are performed in the coordinate-axis-space, NOT in screen pixel space!

Note: Note that this column is only used, when vectorDataLayout is set accordingly to AngleAndLengthLayout! Also note that Setter-functions (e.g. setAngleColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setAngleColumn(), setLengthColumn(), getAngleColumn(), getLengthColumn()

◆ usesColumn()

virtual bool JKQTPXYAndVectorGraph::usesColumn ( int column ) const

overridevirtual

returns true if the given column is used by the graph

This virtual function indicates 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.

Reimplemented from JKQTPXYGraph.

Reimplemented in JKQTPParametrizedVectorFieldGraph.

Property Documentation

◆ angleColumn

int JKQTPXYAndVectorGraph::angleColumn

readwrite

the column that contains the rotation angle [in radian]

An angle of 0 means a right-pointing vector and angle is measured count-clockwise, so angle $\alpha$ and length can be converted to $\Delta x, \Delta y$ via:

$\Delta x = l\cdot \cos\alpha$

$\Delta y = l\cdot \sin\alpha$

Note that these calculations are performed in the coordinate-axis-space, NOT in screen pixel space!

Note: Note that this column is only used, when vectorDataLayout is set accordingly to AngleAndLengthLayout! Also note that Setter-functions (e.g. setAngleColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setAngleColumn(), setLengthColumn(), getAngleColumn(), getLengthColumn()

◆ dxColumn

int JKQTPXYAndVectorGraph::dxColumn

readwrite

the column that contains the delta along the x-axis.

Note: Note that this column is only used, when vectorDataLayout is set accordingly to DeltaXDeltaYLayout! Also note that Setter-functions (e.g. setDxColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setDxColumn(), setDyColumn(), setDxDyColumn(), getDxColumn(), getDyColumn()

◆ dyColumn

int JKQTPXYAndVectorGraph::dyColumn

readwrite

the column that contains the delta along the y-axis.

Note: Note that this column is only used, when vectorDataLayout is set accordingly to DeltaXDeltaYLayout! Also note that Setter-functions (e.g. setDyColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setDxColumn(), setDyColumn(), setDxDyColumn(), getDxColumn(), getDyColumn()

◆ lengthColumn

int JKQTPXYAndVectorGraph::lengthColumn

readwrite

the column that contains the vector length

An angle of 0 means a right-pointing vector and angle is measured count-clockwise, so angle $\alpha$ and length can be converted to $\Delta x, \Delta y$ via:

$\Delta x = l\cdot \cos\alpha$

$\Delta y = l\cdot \sin\alpha$

Note that these calculations are performed in the coordinate-axis-space, NOT in screen pixel space!

Note: Note that this column is only used, when vectorDataLayout is set accordingly to AngleAndLengthLayout! Also note that Setter-functions (e.g. setAngleColumn() ) will ensure that vectorDataLayout is set accordingly.

See also: setAngleColumn(), setLengthColumn(), getAngleColumn(), getLengthColumn()

◆ vectorDataLayout

VectorDataLayout JKQTPXYAndVectorGraph::vectorDataLayout

read

indicates, which column pairs to use (dxColumn, dyColumn), (angleColumn, lengthColumn), ...

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

jkqtpgraphsbase.h

Public Types

Public Slots

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ VectorDataLayout

Constructor & Destructor Documentation

◆ JKQTPXYAndVectorGraph()

Member Function Documentation

◆ formatHitTestDefaultLabel()

◆ getAngleColumn()

◆ getDxColumn()

◆ getDyColumn()

◆ getIndexRange()

◆ getLengthColumn()

◆ getVectorAngle() [1/2]

◆ getVectorAngle() [2/2]

◆ getVectorDataLayout()

◆ getVectorDxDy()

◆ getVectorMagnitude() [1/2]

◆ getVectorMagnitude() [2/2]

◆ getXMinMax()

◆ getYMinMax()

◆ hitTest()

◆ setAngleAndLengthColumn

◆ setAngleColumn

◆ setDxColumn

◆ setDxDyColumn

◆ setDyColumn

◆ setLengthColumn

◆ usesColumn()

Property Documentation

◆ angleColumn

◆ dxColumn

◆ dyColumn

◆ lengthColumn

◆ vectorDataLayout