This graph plots a vector field, i.e. a set of vectors (dx,dy) or (angle,length) at positions (x,y). This class is an extension of JKQTPVectorFieldGraph and additionally supports setting the line-color from an additional data column. More...

#include <jkqtpvectorfield.h>

Inheritance diagram for JKQTPParametrizedVectorFieldGraph:

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Collaboration diagram for JKQTPParametrizedVectorFieldGraph:

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Public Types
enum	VectorColorMode { DefaultColor , ColorFromMagnitude , ColorFromAngle , ColorFromCustomColumn }
	determines how the color of the vector is determined More...
Public Types inherited from JKQTPVectorFieldGraph
enum	VectorAnchorPoint { AnchorBottom , AnchorMid , AnchorTip }
	indicates the position of the point (x,y) relative to the vector More...
enum	VectorLengthMode { AutoscaleLength , LengthFromData , IgnoreLength }
	indicates how the drawn vector's length is calculated from the data More...
enum	VectorLineWidthMode { DefaultVectorLineWidth , AutoscaleLineWidthFromLength }
	describes how the line width scales with the vector properties (or not) More...
Public Types inherited from JKQTPXYAndVectorGraph
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 Member Functions
	JKQTPParametrizedVectorFieldGraph (JKQTBasePlotter *parent=nullptr)
	class constructor
	JKQTPParametrizedVectorFieldGraph (JKQTPlotter *parent)
	class constructor
virtual void	cbGetDataMinMax (double &imin, double &imax) override
	determine min/max data value of the image
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
virtual void	drawOutside (JKQTPEnhancedPainter &painter, QRect leftSpace, QRect rightSpace, QRect topSpace, QRect bottomSpace) override
	plots outside the actual plot field of view (e.g. color bars, scale bars, ...)
int	getColorColumn () const
	this column contains the symbol color
bool	getColorColumnContainsRGB () const
	if this is true, the value in the colorColumn is converted to an integer, representing a color in ARGB format (as in QRgb)
virtual void	getOutsideSize (JKQTPEnhancedPainter &painter, int &leftSpace, int &rightSpace, int &topSpace, int &bottomSpace) override
	if the graph plots outside the actual plot field of view (e.g. color bars, scale bars, ...)
VectorColorMode	getVectorColorMode () const
	indicates how color is determined from data (either from the vector or from m_colorColumn)
void	setColorColumn (int __value)
	this column contains the symbol color
void	setColorColumn (size_t __value)
	this column contains the symbol color
void	setColorColumnContainsRGB (bool __value)
	if this is true, the value in the colorColumn is converted to an integer, representing a color in ARGB format (as in QRgb)
virtual void	setParent (JKQTBasePlotter *parent) override
	sets the parent painter class
void	setVectorColorMode (VectorColorMode __value)
	indicates how color is determined from data (either from the vector or from m_colorColumn)
virtual bool	usesColumn (int c) const override
	returns `true` if the given column is used by the graph
Public Member Functions inherited from JKQTPVectorFieldGraph
	JKQTPVectorFieldGraph (JKQTBasePlotter *parent=nullptr)
	class constructor
	JKQTPVectorFieldGraph (JKQTPlotter *parent)
	class constructor
VectorAnchorPoint	getAnchorPoint () const
	defines where the vector is anchored
double	getAutoscaleLengthFactor () const
	a scaling factor that can be used to modify the result of the autoscaling algorithm (m_vectorLengthMode `==AutoscaleLength`)
virtual QColor	getKeyLabelColor () const override
	returns the color to be used for the key label
double	getLengthScaleFactor () const
	if m_vectorLengthMode `==false`, this is the scale-factor used to calculate the vector length
double	getMinLineWIdth () const
	minimum line-width in pt, used for some modes of m_vectorLineWidthMode
VectorLengthMode	getVectorLengthMode () const
	indicates how the length of the drawn vectors are determined from the data
VectorLineWidthMode	getVectorLineWidthMode () const
	determines how the line width of the vectors is derived.
void	setAnchorPoint (VectorAnchorPoint newAnchorPoint)
	defines where the vector is anchored
void	setAutoscaleLengthFactor (double newAutoscaleLengthFactor)
	a scaling factor that can be used to modify the result of the autoscaling algorithm (m_vectorLengthMode `==AutoscaleLength`)
void	setLengthScaleFactor (double newLengthScaleFactor)
	if m_vectorLengthMode `==false`, this is the scale-factor used to calculate the vector length
void	setMinLineWidth (double lw)
	minimum line-width in pt, used for some modes of m_vectorLineWidthMode
void	setVectorLengthMode (VectorLengthMode newMode)
	indicates how the length of the drawn vectors are determined from the data
void	setVectorLineWidthMode (VectorLineWidthMode m)
	determines how the line width of the vectors is derived.
Public Member Functions inherited from JKQTPXYAndVectorGraph
	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.
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
QImage	generateKeyMarker (QSize size=QSize(16, 16))
	returns an image with a key marker inside
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 (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 JKQTPGraphDecoratedLineStyleMixin
	JKQTPGraphDecoratedLineStyleMixin ()
	class constructor
virtual	~JKQTPGraphDecoratedLineStyleMixin ()
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	calcTailDecoratorSize (double line_width) const
	calculates the tail decorator size from the line width line_width, using m_tailDecoratorSizeFactor 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
double	getTailDecoratorSizeFactor () const
	tail decorator size-factor, used to calculate the size of the arrow from the line width
JKQTPLineDecoratorStyle	getTailDecoratorStyle () const
	get the tail decorator style
void	initDecoratedLineStyle (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
void	setTailDecoratorSizeFactor (const double &__value)
	tail decorator size-factor, used to calculate the size of the arrow from the line width
void	setTailDecoratorStyle (const JKQTPLineDecoratorStyle &__value)
	set the tail 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)
Public Member Functions inherited from JKQTPColorPaletteStyleAndToolsMixin
	JKQTPColorPaletteStyleAndToolsMixin (JKQTBasePlotter *parent)
virtual	~JKQTPColorPaletteStyleAndToolsMixin ()
virtual void	cbDrawOutside (JKQTPEnhancedPainter &painter, QRect leftSpace, QRect rightSpace, QRect topSpace, QRect bottomSpace)
	plots outside the actual plot field of view (e.g. color bars, scale bars, ...)
virtual void	cbGetOutsideSize (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, ...)
virtual void	cbSetParent (JKQTBasePlotter *parent)
	set the parent class for internal objects (e.g. color bars)
JKQTPMathImageColorRangeFailAction	getActionRangeMaxFail () const
	which action to take if a color is above imageMax and autoImageRange `==false`
JKQTPMathImageColorRangeFailAction	getActionRangeMinFail () const
	which action to take if a color is below imageMin and autoImageRange `==false`
bool	getAutoImageRange () const
	indicates whether to estimate min/max of the image automatically
int	getColorBarOffset () const
	offset between outside space border and color bar
double	getColorBarRelativeHeight () const
	height of the color bar, as multiple of plotHeight
JKQTPVerticalIndependentAxis *	getColorBarRightAxis ()
	object used for color bar axes at the right
const JKQTPVerticalIndependentAxis *	getColorBarRightAxis () const
	object used for color bar axes at the right
bool	getColorBarRightVisible () const
	right color bar visible
JKQTPHorizontalIndependentAxis *	getColorBarTopAxis ()
	object used for color bar axes at the top
const JKQTPHorizontalIndependentAxis *	getColorBarTopAxis () const
	object used for color bar axes at the top
bool	getColorBarTopVisible () const
	top color bar visible
int	getColorBarWidth () const
	width of the color bar
JKQTPMathImageColorPalette	getColorPalette () const
	palette for plotting an image
double	getImageMax () const
	image value range maximum
double	getImageMin () const
	image value range minimum
QString	getImageName () const
	name of the image displayed above color bar (may contain LaTeX markup!)
QString	getImageNameFontName () const
	font name when displaying imageName
double	getImageNameFontSize () const
	font size in points when displaying imageName
QColor	getInfColor () const
	color to use for an infinity value
QColor	getNanColor () const
	color to use for a not-a-number value
QColor	getRangeMaxFailColor () const
	color to use for some settings of rangeMaxFailAction
QColor	getRangeMinFailColor () const
	color to use for some settings of rangeMinFailAction
bool	getShowColorBar () const
	indicate whether to display a color bar
void	setAutoImageRange (bool __value)
	indicates whether to estimate min/max of the image automatically
void	setColorBarOffset (int __value)
	offset between outside space border and color bar
void	setColorBarRelativeHeight (double __value)
	height of the color bar, as multiple of plotHeight
void	setColorBarRightVisible (bool __value)
	right color bar visible
void	setColorBarTopVisible (bool __value)
	top color bar visible
void	setColorBarWidth (int __value)
	width of the color bar
void	setColorPalette (const JKQTPMathImageColorPalette &__value)
	palette for plotting an image
void	setColorPalette (int pal)
	palette for plotting an image
void	setImageMax (double __value)
	image value range maximum
void	setImageMin (double __value)
	image value range minimum
void	setImageName (const QString &__value)
	name of the image displayed above color bar (may contain LaTeX markup!)
void	setImageNameFontName (const QString &__value)
	font name when displaying imageName
void	setImageNameFontSize (double __value)
	font size in points when displaying imageName
void	setInfColor (const QColor &__value)
	color to use for an infinity value
void	setNanColor (const QColor &__value)
	color to use for a not-a-number value
void	setRangeMaxFailAction (const JKQTPMathImageColorRangeFailAction &__value)
	which action to take if a color is above imageMax and autoImageRange `==false`
void	setRangeMaxFailColor (const QColor &__value)
	color to use for some settings of rangeMaxFailAction
void	setRangeMinFailAction (const JKQTPMathImageColorRangeFailAction &__value)
	which action to take if a color is below imageMin and autoImageRange `==false`
void	setRangeMinFailColor (const QColor &__value)
	color to use for some settings of rangeMinFailAction
void	setShowColorBar (bool __value)
	indicate whether to display a color bar

Protected Member Functions
virtual QColor	getLocalVectorColor (int i, double x, double y, double dx, double dy) const override
Protected Member Functions inherited from JKQTPVectorFieldGraph
double	getMaxVecLen () const
	acess to internally calculated (before draw() actually draws) maximum vector length
double	getMinVecLen () const
	acess to internally calculated (before draw() actually draws) minimum vector length
Protected Member Functions inherited from JKQTPXYAndVectorGraph
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

Private Attributes
int	m_colorColumn
	this column contains the symbol color
bool	m_colorColumnContainsRGB
	if this is true, the value in the colorColumn is converted to an integer, representing a color in ARGB format (as in QRgb)
double	m_intColMax
	internally used to store the range of the color column
double	m_intColMin
	internally used to store the range of the color column
VectorColorMode	m_vectorColorMode
	indicates how color is determined from data (either from the vector or from m_colorColumn)

Additional Inherited Members
Public Slots inherited from JKQTPXYAndVectorGraph
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
Static Public Member Functions inherited from JKQTPColorPaletteStyleAndToolsMixin
static QIcon	getPaletteIcon (int i)
	get QIcon representing the given palette
static QIcon	getPaletteIcon (JKQTPMathImageColorPalette palette)
	get QIcon representing the given palette
static QImage	getPaletteImage (int i, size_t width)
	get QIcon representing the given palette
static QImage	getPaletteImage (JKQTPMathImageColorPalette palette, size_t width)
	get QIcon representing the given palette
static QIcon	getPaletteKeyIcon (int i)
	get QIcon representing the given palette
static QIcon	getPaletteKeyIcon (JKQTPMathImageColorPalette palette)
	get QIcon representing the given palette
static QImage	getPaletteKeyImage (int i, size_t width, size_t height)
	get QIcon representing the given palette
static QImage	getPaletteKeyImage (JKQTPMathImageColorPalette palette, size_t width, size_t height)
	get QIcon representing the given palette
static QStringList	getPalettes ()
	get list with all available palettes
static int	getPalettesCount ()
	get list with all available palettes
Static Protected Member Functions inherited from JKQTPXYAndVectorGraph
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
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
Protected Attributes inherited from JKQTPColorPaletteStyleAndToolsMixin
bool	autoImageRange
	indicates whether to estimate min/max of the image automatically
JKQTBasePlotter *	cbParent
int	colorBarOffset
	offset between outside space border and color bar
double	colorBarRelativeHeight
	height of the color bar, as multiple of plotHeight
JKQTPVerticalIndependentAxis *	colorBarRightAxis
	object used for color bar axes at the right
bool	colorBarRightVisible
	right color bar visible
JKQTPHorizontalIndependentAxis *	colorBarTopAxis
	object used for color bar axes at the top
bool	colorBarTopVisible
	top color bar visible
int	colorBarWidth
	width of the color bar
double	imageMax
	image value range maximum
double	imageMin
	image value range minimum
QString	imageName
	name of the image displayed above color bar (may contain LaTeX markup!)
QString	imageNameFontName
	font name when displaying imageName
double	imageNameFontSize
	font size in points when displaying imageName
QColor	infColor
	color to use for an infinity value
QColor	nanColor
	color to use for a not-a-number value
JKQTPMathImageColorPalette	palette
	palette for plotting an image
JKQTPMathImageColorRangeFailAction	rangeMaxFailAction
	which action to take if a color is above imageMax and autoImageRange `==false`
QColor	rangeMaxFailColor
	color to use for some settings of rangeMaxFailAction
JKQTPMathImageColorRangeFailAction	rangeMinFailAction
	which action to take if a color is below imageMin and autoImageRange `==false`
QColor	rangeMinFailColor
	color to use for some settings of rangeMinFailAction
bool	showColorBar
	indicate whether to display a color bar
Properties inherited from JKQTPVectorFieldGraph
VectorAnchorPoint	anchorPoint
bool	autoscaleLengthFactor
double	lengthScaleFactor
double	minLineWidth
VectorLengthMode	vectorLengthMode
VectorLineWidthMode	vectorLineWidthMode
Properties inherited from JKQTPXYAndVectorGraph
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
Properties inherited from JKQTPGraphDecoratedLineStyleMixin
double	headDecoratorSizeFactor
JKQTPLineDecoratorStyle	headDecoratorStyle
double	tailDecoratorSizeFactor
JKQTPLineDecoratorStyle	tailDecoratorStyle
Properties inherited from JKQTPGraphLineStyleMixin
QColor	highlightingLineColor
QColor	lineColor
Qt::PenStyle	lineStyle
double	lineWidth

Detailed Description

This graph plots a vector field, i.e. a set of vectors (dx,dy) or (angle,length) at positions (x,y). This class is an extension of JKQTPVectorFieldGraph and additionally supports setting the line-color from an additional data column.

Note: This type of plot is sometimes also refered to as quiver plot (e.g. in Matlab or matplotlib)

To achieve this, use code like this:

// 1. setup a plotter window and get a pointer to the internal datastore (for convenience)
JKQTPlotter plot;
JKQTPDatastore* ds=plot.getDatastore();
 
// 2. make up some arbitrary data to be used for plotting
//    this generates a 2D grid of x/y-coordinates and then calculates dx=cos(y)*sqrt(x/3.0) and dy=sin(x)*sqrt(x/3.0)
const auto columnXY=ds->addLinearGridColumns(NX, 0, 6, NY, -3, 3,"x","y");
const auto columnDX=ds->addCalculatedColumnFromColumn(columnXY.first, columnXY.second, [](double x,double y) { return sin(y)*sqrt(x/3.0); });
const auto columnDY=ds->addCalculatedColumnFromColumn(columnXY.first, columnXY.second, [](double x,double y) { return cos(x)*sqrt(x/3.0); });
 
// 3. create JKQTPVectorFieldGraph to display the data:
JKQTPVectorFieldGraph* graph1=new JKQTPVectorFieldGraph(&plot);
graph1->setXYColumns(columnXY);
graph1->setDxColumn(columnDX);
graph1->setDyColumn(columnDY);
graph1->setTitle(QObject::tr("$\\vec{f}(x,y)=\\bigl[\\sin(y)\\cdot\\sqrt{x/3}, \\cos(x)\\cdot\\sqrt{x/3}\\bigr]^\\mathrm{T}$"));
 
// 4. add the graphs to the plot, so it is actually displayed
plot.addGraph(graph1);

Use setVectorColorMode() if you don't want to use a custom column, but just use the vector's magnitude/length or rotation angle as parameter for the color.

See also: Example (JKQTPlotter): Vector Field Plot Example , JKQTPVectorFieldGraph , JKQTPColorPaletteStyleAndToolsMixin

Member Enumeration Documentation

◆ VectorColorMode

enum JKQTPParametrizedVectorFieldGraph::VectorColorMode

determines how the color of the vector is determined

Enumerator
DefaultColor	no color-coding, just use getLineColor()
ColorFromMagnitude	color-coding by vector magnitude/length
ColorFromAngle	color-coding by vector angle
ColorFromCustomColumn	color-coding from getColorColumn() column

Constructor & Destructor Documentation

◆ JKQTPParametrizedVectorFieldGraph() [1/2]

JKQTPParametrizedVectorFieldGraph::JKQTPParametrizedVectorFieldGraph ( JKQTBasePlotter * parent = nullptr )

explicit

class constructor

◆ JKQTPParametrizedVectorFieldGraph() [2/2]

JKQTPParametrizedVectorFieldGraph::JKQTPParametrizedVectorFieldGraph ( JKQTPlotter * parent )

class constructor

Member Function Documentation

◆ cbGetDataMinMax()

virtual void JKQTPParametrizedVectorFieldGraph::cbGetDataMinMax	(	double &	imin,
		double &	imax )

overridevirtual

determine min/max data value of the image

Implements JKQTPColorPaletteStyleAndToolsMixin.

◆ draw()

virtual void JKQTPParametrizedVectorFieldGraph::draw ( JKQTPEnhancedPainter & painter )

overridevirtual

plots the graph to the plotter object specified as parent

Reimplemented from JKQTPVectorFieldGraph.

◆ drawKeyMarker()

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

overridevirtual

plots a key marker inside the specified rectangle rect

Reimplemented from JKQTPVectorFieldGraph.

◆ drawOutside()

virtual void JKQTPParametrizedVectorFieldGraph::drawOutside	(	JKQTPEnhancedPainter &	painter,
		QRect	leftSpace,
		QRect	rightSpace,
		QRect	topSpace,
		QRect	bottomSpace )

overridevirtual

plots outside the actual plot field of view (e.g. color bars, scale bars, ...)

Note: If you want to draw outside, then you'll also have to implement getOutsideSize(), so enough space is reserved

The four value supplied tell the method where to draw (inside one of the rectangles).

Reimplemented from JKQTPPlotElement.

◆ getColorColumn()

int JKQTPParametrizedVectorFieldGraph::getColorColumn ( ) const

this column contains the symbol color

See also: setColorColumn(), getColorColumn()

◆ getColorColumnContainsRGB()

bool JKQTPParametrizedVectorFieldGraph::getColorColumnContainsRGB ( ) const

if this is true, the value in the colorColumn is converted to an integer, representing a color in ARGB format (as in QRgb)

See also: setColorColumnContainsRGB(), getColorColumnContainsRGB()

◆ getLocalVectorColor()

virtual QColor JKQTPParametrizedVectorFieldGraph::getLocalVectorColor	(	int	i,
		double	x,
		double	y,
		double	dx,
		double	dy ) const

overrideprotectedvirtual

\copdydoc JKQTPVectorFieldGraph::getLocalVectorColor()

Reimplemented from JKQTPVectorFieldGraph.

◆ getOutsideSize()

virtual void JKQTPParametrizedVectorFieldGraph::getOutsideSize	(	JKQTPEnhancedPainter &	painter,
		int &	leftSpace,
		int &	rightSpace,
		int &	topSpace,
		int &	bottomSpace )

overridevirtual

if the graph plots outside the actual plot field of view (e.g. color bars, scale bars, ...)

Note: If you want to draw outside, then you'll also have to implement drawOutside()

Reimplemented from JKQTPPlotElement.

◆ getVectorColorMode()

VectorColorMode JKQTPParametrizedVectorFieldGraph::getVectorColorMode ( ) const

indicates how color is determined from data (either from the vector or from m_colorColumn)

◆ setColorColumn() [1/2]

void JKQTPParametrizedVectorFieldGraph::setColorColumn ( int __value )

this column contains the symbol color

See also: setColorColumn(), getColorColumn()

◆ setColorColumn() [2/2]

void JKQTPParametrizedVectorFieldGraph::setColorColumn ( size_t __value )

this column contains the symbol color

See also: setColorColumn(), getColorColumn()

◆ setColorColumnContainsRGB()

void JKQTPParametrizedVectorFieldGraph::setColorColumnContainsRGB ( bool __value )

if this is true, the value in the colorColumn is converted to an integer, representing a color in ARGB format (as in QRgb)

See also: setColorColumnContainsRGB(), getColorColumnContainsRGB()

◆ setParent()

virtual void JKQTPParametrizedVectorFieldGraph::setParent ( JKQTBasePlotter * parent )

overridevirtual

sets the parent painter class

Reimplemented from JKQTPPlotElement.

◆ setVectorColorMode()

void JKQTPParametrizedVectorFieldGraph::setVectorColorMode ( VectorColorMode __value )

indicates how color is determined from data (either from the vector or from m_colorColumn)

◆ usesColumn()

virtual bool JKQTPParametrizedVectorFieldGraph::usesColumn ( int c ) 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 JKQTPXYAndVectorGraph.

Member Data Documentation

◆ m_colorColumn

int JKQTPParametrizedVectorFieldGraph::m_colorColumn

private

this column contains the symbol color

See also: setColorColumn(), getColorColumn()

◆ m_colorColumnContainsRGB

bool JKQTPParametrizedVectorFieldGraph::m_colorColumnContainsRGB

private

if this is true, the value in the colorColumn is converted to an integer, representing a color in ARGB format (as in QRgb)

See also: setColorColumnContainsRGB(), getColorColumnContainsRGB()

◆ m_intColMax

double JKQTPParametrizedVectorFieldGraph::m_intColMax

private

internally used to store the range of the color column

◆ m_intColMin

double JKQTPParametrizedVectorFieldGraph::m_intColMin

private

internally used to store the range of the color column

◆ m_vectorColorMode

VectorColorMode JKQTPParametrizedVectorFieldGraph::m_vectorColorMode

private

indicates how color is determined from data (either from the vector or from m_colorColumn)

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

jkqtpvectorfield.h

Public Types

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ VectorColorMode

Constructor & Destructor Documentation

◆ JKQTPParametrizedVectorFieldGraph() [1/2]

◆ JKQTPParametrizedVectorFieldGraph() [2/2]

Member Function Documentation

◆ cbGetDataMinMax()

◆ draw()

◆ drawKeyMarker()

◆ drawOutside()

◆ getColorColumn()

◆ getColorColumnContainsRGB()

◆ getLocalVectorColor()

◆ getOutsideSize()

◆ getVectorColorMode()

◆ setColorColumn() [1/2]

◆ setColorColumn() [2/2]

◆ setColorColumnContainsRGB()

◆ setParent()

◆ setVectorColorMode()

◆ usesColumn()

Member Data Documentation

◆ m_colorColumn

◆ m_colorColumnContainsRGB

◆ m_intColMax

◆ m_intColMin

◆ m_vectorColorMode