SplineItem Class Reference

Spline item class. More...

#include <splineitem.h>

Inheritance diagram for SplineItem:

Public Types
enum	{ Type = UserType + Spline }
	Specific QGraphicsItem type number for function type() More...
Public Types inherited from KplItem
enum	FillStyle {   NoBrush, SolidPattern, HorPattern, VerPattern,   CrossPattern, BDiagPattern, FDiagPattern, DiagCrossPattern }
	Fill styles. More...
enum	ItemType {   Frame = 1, Array, Function, ParFunction,   Spline, Array3D, Function3D, Legend,   Text, Line, Arrow, Arc,   Rectangle, Ellipse, Image, ScaleBar }
	Item types. More...
enum	PenType { FramePen, GridPen, DataPen }
	Pen types. More...
enum	Symbol {   Invisible = -17, FilledOctagon, FilledHourglass, FilledTriangle,   FilledSquare, FilledDiamond, FilledCircle, Umbrella,   Ypsilon, Plus, Cross, OpenOctagon,   OpenHourglass, OpenTriangle, OpenSquare, OpenDiamond,   Dot, OpenCircle, SolidLine, DashLine1,   DashLine2, DotLine1, DashLine3, DashDotLine,   DashLine4, DashLine5, DotLine2 }
	Symbol types. More...

Public Member Functions
	SplineItem (int degree=3, int derivOrder=0, double xLow=0, unsigned color=0, Symbol symbol=SolidLine, double fx=1, double fy=1, QGraphicsItem *parent=0, double xMin=0, double xMax=0, double deltaX=0, bool visible=true, FillStyle fillStyle=NoBrush, double xOffset=0, double yOffset=0, double relSize=1)
	Constructor. More...
	SplineItem (const SplineItem &a)
	Copy constructor. More...
	SplineItem (const KConfigGroup *plo, unsigned color=0, Symbol symbol=SolidLine, QGraphicsItem *parent=0)
	Constructor. More...
virtual	~SplineItem ()
	Destructor. More...
virtual QRectF	boundingRect () const
	Calculates bounding rectangle. More...
int	calcTable (bool logX) const
	Calculates spline value table. More...
int	calcTable (const double *x, double *values, int n=1, int derivOrder=0, double xLow=0) const
	Calculates spline value table. More...
void	copySpline (const SplineItem *a)
	Copies spline data. More...
int	degree () const
	Returns degree of spline. More...
double	deltaX () const
	Returns argument step size. More...
int	derivOrder () const
	Returns order of derivative. More...
void	exponent (int &expX, int &expY, double &fx, double &fy, bool logX) const
	Calculates normalization factors. More...
void	exportTable (QTextStream &stream, char separator, char format, int precision) const
	Exports spline value table to file. More...
int	fit (const ArrayItem *ai, double xMin, double xMax, double *chiSquare=0, int *numKnots=0, double smooth=0, FunItem::DataErrorStruct *err=0, double *avgErr=0)
	Performs smoothing spline fit. More...
int	fit (const double *x, const double *y, const double *errors, int n, double xMin, double xMax, double *chiSquare=0, int *numKnots=0, double smooth=0, FunItem::DataErrorStruct *err=0, double *avgErr=0)
	Performs smoothing spline fit. More...
int	interpolation (const double *x, const double *y, int n, double xMin, double xMax)
	Performs interpolating (non-smoothing) spline fit. More...
void	limits (double &xMin, double &xMax, double &yMin, double &yMax, bool logX) const
	Calculates minimum and maximum values. More...
int	numKnots () const
	Returns number of knots. More...
virtual void	paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget=0)
	Paints item. More...
int	roots (QVector< double > &zero, int derivOrder=0, double offset=0) const
	Finds roots of a cubic spline or its derivatives. More...
void	setDashOffset ()
	Sets offset for dashed lines. More...
void	setDegree (int degree)
	Sets degree of spline. More...
void	setDeltaX (double deltaX)
	Sets argument step size. More...
void	setDerivOrder (int derivOrder)
	Sets order of derivative. More...
void	setXLow (double xLow)
	Sets lower x limit for spline integral. More...
void	setXMax (double xMax)
	Sets maximum argument value. More...
void	setXMin (double xMin)
	Sets minimum argument value. More...
virtual QPainterPath	shape () const
	Returns the shape of the plot item. More...
virtual int	type () const
	Returns specific QGraphicsItem type number. More...
void	writePlo (KConfigGroup *plo, char format, int precision) const
	Writes into plot file. More...
double	xLow () const
	Returns lower x limit for spline integral. More...
double	xMax () const
	Returns maximum argument value. More...
double	xMin () const
	Returns minimum argument value. More...
double *	xValues () const
	Returns pointer to x function value array. More...
double *	yValues () const
	Returns pointer to y function value array. More...
Public Member Functions inherited from ScaledItem
	ScaledItem ()
	Constructor. More...
	ScaledItem (const ScaledItem &a)
	Copy constructor. More...
	ScaledItem (const KConfigGroup *plo, Symbol symbol, unsigned color, QGraphicsItem *parent)
	Constructor. More...
	ScaledItem (FillStyle fillStyle, Symbol symbol, unsigned color, double fx, double fy, double xOffset, double yOffset, double relSize, QGraphicsItem *parent)
	Constructor. More...
virtual	~ScaledItem ()
	Destructor. More...
unsigned	color () const
	Returns color. More...
FillStyle	fillStyle () const
	Returns fill style. More...
bool	isNormalized (double fx, double fy) const
	Checks if both normalization factors are equal to given values. More...
void	normalize (double fx, double fy)
	Sets normalization factors. More...
double	normX () const
	Returns normalization factor for x values. More...
double	normY () const
	Returns normalization factor for y values. More...
QPixmap	pixmap () const
	Returns decoration pixmap for item list. More...
void	readPlo (const KConfigGroup *plo, Symbol symbol, unsigned color)
	Initializes corresponding to plot file. More...
void	setColor (unsigned color)
	Sets color. More...
void	setFillStyle (FillStyle style)
	Sets fill style. More...
void	setNormX (double fx)
	Sets normalization factor for x values. More...
void	setNormY (double fy)
	Sets normalization factor for y values. More...
void	setProperties (const QTransform &m)
	Sets properties according to transformation matrix. More...
void	setSize ()
	Sets size according to transformation matrix. More...
void	setSymbol (Symbol symbol)
	Sets symbol type. More...
void	setXOffset (double xOffset)
	Sets offset for x values. More...
void	setYOffset (double yOffset)
	Sets offset for y values. More...
Symbol	symbol () const
	Returns symbol type. More...
void	update ()
	Applies changes and forces redrawing. More...
void	updateGeometry ()
	Updates geometry. More...
void	writePlo (KConfigGroup *plo, bool visible) const
	Writes into plot file. More...
double	xOffset () const
	Returns offset for x values. More...
double	yOffset () const
	Returns offset for y values. More...
Public Member Functions inherited from KplItem
	KplItem (double relSize=1)
	Constructor. More...
	KplItem (const KplItem &a)
	Copy constructor. More...
	KplItem (const KConfigGroup *plo)
	Constructor. More...
virtual	~KplItem ()
	Destructor. More...
void	readPlo (const KConfigGroup *plo)
	Initializes corresponding to plot file. More...
double	relSize () const
	Returns relative size of item. More...
void	setRelSize (double relSize)
	Sets relative size of item. More...
void	writePlo (KConfigGroup *plo, bool visible=true) const
	Writes into plot file. More...
Public Member Functions inherited from QGraphicsItem
	QGraphicsItem (QGraphicsItem *parent)
QGraphicsScene *	scene () const
QGraphicsItem *	parentItem () const
QGraphicsItem *	topLevelItem () const
QGraphicsObject *	parentObject () const
QGraphicsWidget *	parentWidget () const
QGraphicsWidget *	topLevelWidget () const
QGraphicsWidget *	window () const
QGraphicsItem *	panel () const
void	setParentItem (QGraphicsItem *newParent)
QList< QGraphicsItem * >	children () const
QList< QGraphicsItem * >	childItems () const
bool	isWidget () const
bool	isWindow () const
bool	isPanel () const
QGraphicsObject *	toGraphicsObject ()
const QGraphicsObject *	toGraphicsObject () const
QGraphicsItemGroup *	group () const
void	setGroup (QGraphicsItemGroup *group)
GraphicsItemFlags	flags () const
void	setFlag (GraphicsItemFlag flag, bool enabled)
void	setFlags (GraphicsItemFlags flags)
CacheMode	cacheMode () const
void	setCacheMode (CacheMode mode, const QSize &logicalCacheSize)
PanelModality	panelModality () const
void	setPanelModality (PanelModality panelModality)
bool	isBlockedByModalPanel (QGraphicsItem **blockingPanel) const
QString	toolTip () const
void	setToolTip (const QString &toolTip)
QCursor	cursor () const
void	setCursor (const QCursor &cursor)
bool	hasCursor () const
void	unsetCursor ()
bool	isVisible () const
bool	isVisibleTo (const QGraphicsItem *parent) const
void	setVisible (bool visible)
void	hide ()
void	show ()
bool	isEnabled () const
void	setEnabled (bool enabled)
bool	isSelected () const
void	setSelected (bool selected)
bool	acceptDrops () const
void	setAcceptDrops (bool on)
qreal	opacity () const
qreal	effectiveOpacity () const
void	setOpacity (qreal opacity)
QGraphicsEffect *	graphicsEffect () const
void	setGraphicsEffect (QGraphicsEffect *effect)
Qt::MouseButtons	acceptedMouseButtons () const
void	setAcceptedMouseButtons (Qt::MouseButtons buttons)
bool	acceptsHoverEvents () const
void	setAcceptsHoverEvents (bool enabled)
bool	acceptHoverEvents () const
void	setAcceptHoverEvents (bool enabled)
bool	acceptTouchEvents () const
void	setAcceptTouchEvents (bool enabled)
bool	filtersChildEvents () const
void	setFiltersChildEvents (bool enabled)
bool	handlesChildEvents () const
void	setHandlesChildEvents (bool enabled)
bool	isActive () const
void	setActive (bool active)
bool	hasFocus () const
void	setFocus (Qt::FocusReason focusReason)
void	clearFocus ()
QGraphicsItem *	focusProxy () const
void	setFocusProxy (QGraphicsItem *item)
QGraphicsItem *	focusItem () const
void	grabMouse ()
void	ungrabMouse ()
void	grabKeyboard ()
void	ungrabKeyboard ()
QPointF	pos () const
qreal	x () const
void	setX (qreal x)
qreal	y () const
void	setY (qreal y)
QPointF	scenePos () const
void	setPos (const QPointF &pos)
void	setPos (qreal x, qreal y)
void	moveBy (qreal dx, qreal dy)
void	ensureVisible (const QRectF &rect, int xmargin, int ymargin)
void	ensureVisible (qreal x, qreal y, qreal w, qreal h, int xmargin, int ymargin)
QMatrix	matrix () const
QMatrix	sceneMatrix () const
void	setMatrix (const QMatrix &matrix, bool combine)
void	resetMatrix ()
QTransform	transform () const
QTransform	sceneTransform () const
QTransform	deviceTransform (const QTransform &viewportTransform) const
QTransform	itemTransform (const QGraphicsItem *other, bool *ok) const
void	setTransform (const QTransform &matrix, bool combine)
void	resetTransform ()
void	rotate (qreal angle)
void	scale (qreal sx, qreal sy)
void	shear (qreal sh, qreal sv)
void	translate (qreal dx, qreal dy)
void	setRotation (qreal angle)
qreal	rotation () const
void	setScale (qreal factor)
qreal	scale () const
QList< QGraphicsTransform * >	transformations () const
void	setTransformations (const QList< QGraphicsTransform * > &transformations)
QPointF	transformOriginPoint () const
void	setTransformOriginPoint (const QPointF &origin)
void	setTransformOriginPoint (qreal x, qreal y)
virtual void	advance (int phase)
qreal	zValue () const
void	setZValue (qreal z)
void	stackBefore (const QGraphicsItem *sibling)
QRectF	childrenBoundingRect () const
QRectF	sceneBoundingRect () const
bool	isClipped () const
QPainterPath	clipPath () const
virtual bool	contains (const QPointF &point) const
virtual bool	collidesWithItem (const QGraphicsItem *other, Qt::ItemSelectionMode mode) const
virtual bool	collidesWithPath (const QPainterPath &path, Qt::ItemSelectionMode mode) const
QList< QGraphicsItem * >	collidingItems (Qt::ItemSelectionMode mode) const
bool	isObscured (const QRectF &rect) const
bool	isObscured (qreal x, qreal y, qreal w, qreal h) const
virtual bool	isObscuredBy (const QGraphicsItem *item) const
virtual QPainterPath	opaqueArea () const
QRegion	boundingRegion (const QTransform &itemToDeviceTransform) const
qreal	boundingRegionGranularity () const
void	setBoundingRegionGranularity (qreal granularity)
void	update (const QRectF &rect)
void	update (qreal x, qreal y, qreal width, qreal height)
void	scroll (qreal dx, qreal dy, const QRectF &rect)
QPointF	mapToItem (const QGraphicsItem *item, const QPointF &point) const
QPointF	mapToParent (const QPointF &point) const
QPointF	mapToScene (const QPointF &point) const
QPolygonF	mapToItem (const QGraphicsItem *item, const QRectF &rect) const
QPolygonF	mapToParent (const QRectF &rect) const
QPolygonF	mapToScene (const QRectF &rect) const
QRectF	mapRectToItem (const QGraphicsItem *item, const QRectF &rect) const
QRectF	mapRectToParent (const QRectF &rect) const
QRectF	mapRectToScene (const QRectF &rect) const
QPolygonF	mapToItem (const QGraphicsItem *item, const QPolygonF &polygon) const
QPolygonF	mapToParent (const QPolygonF &polygon) const
QPolygonF	mapToScene (const QPolygonF &polygon) const
QPainterPath	mapToItem (const QGraphicsItem *item, const QPainterPath &path) const
QPainterPath	mapToParent (const QPainterPath &path) const
QPainterPath	mapToScene (const QPainterPath &path) const
QPointF	mapFromItem (const QGraphicsItem *item, const QPointF &point) const
QPointF	mapFromParent (const QPointF &point) const
QPointF	mapFromScene (const QPointF &point) const
QPolygonF	mapFromItem (const QGraphicsItem *item, const QRectF &rect) const
QPolygonF	mapFromParent (const QRectF &rect) const
QPolygonF	mapFromScene (const QRectF &rect) const
QRectF	mapRectFromItem (const QGraphicsItem *item, const QRectF &rect) const
QRectF	mapRectFromParent (const QRectF &rect) const
QRectF	mapRectFromScene (const QRectF &rect) const
QPolygonF	mapFromItem (const QGraphicsItem *item, const QPolygonF &polygon) const
QPolygonF	mapFromParent (const QPolygonF &polygon) const
QPolygonF	mapFromScene (const QPolygonF &polygon) const
QPainterPath	mapFromItem (const QGraphicsItem *item, const QPainterPath &path) const
QPainterPath	mapFromParent (const QPainterPath &path) const
QPainterPath	mapFromScene (const QPainterPath &path) const
QPointF	mapToItem (const QGraphicsItem *item, qreal x, qreal y) const
QPointF	mapToParent (qreal x, qreal y) const
QPointF	mapToScene (qreal x, qreal y) const
QPolygonF	mapToItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
QPolygonF	mapToParent (qreal x, qreal y, qreal w, qreal h) const
QPolygonF	mapToScene (qreal x, qreal y, qreal w, qreal h) const
QRectF	mapRectToItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
QRectF	mapRectToParent (qreal x, qreal y, qreal w, qreal h) const
QRectF	mapRectToScene (qreal x, qreal y, qreal w, qreal h) const
QPointF	mapFromItem (const QGraphicsItem *item, qreal x, qreal y) const
QPointF	mapFromParent (qreal x, qreal y) const
QPointF	mapFromScene (qreal x, qreal y) const
QPolygonF	mapFromItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
QPolygonF	mapFromParent (qreal x, qreal y, qreal w, qreal h) const
QPolygonF	mapFromScene (qreal x, qreal y, qreal w, qreal h) const
QRectF	mapRectFromItem (const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
QRectF	mapRectFromParent (qreal x, qreal y, qreal w, qreal h) const
QRectF	mapRectFromScene (qreal x, qreal y, qreal w, qreal h) const
bool	isAncestorOf (const QGraphicsItem *child) const
QGraphicsItem *	commonAncestorItem (const QGraphicsItem *other) const
bool	isUnderMouse () const
QVariant	data (int key) const
void	setData (int key, const QVariant &value)
Qt::InputMethodHints	inputMethodHints () const
void	setInputMethodHints (Qt::InputMethodHints hints)
void	installSceneEventFilter (QGraphicsItem *filterItem)
void	removeSceneEventFilter (QGraphicsItem *filterItem)

Static Public Member Functions
static int	sortArrays (const double *x0, const double *y0, const double *errors0, int &n, FunItem::DataErrorStruct *err, double *x, double *y, double *errors)
	Sorts arrays and calculates error column. More...
Static Public Member Functions inherited from ScaledItem
static void	exponent (double a, int &iExp, double &f)
	Calculates normalization factor. More...
static bool	limits (double &xMin, double &xMax, const double *values, int n)
	Calculates minimum and maximum values of an array. More...
Static Public Member Functions inherited from KplItem
static QUrl	absoluteUrl (const QString &path, const QUrl &urlPlo)
	Constructs absolute file URL. More...
static QBrush	createBrush (unsigned color, FillStyle fillStyle=NoBrush)
	Creates brush. More...
static QPen	createPen (double width, unsigned color, PenType penType, Symbol symbol)
	Creates pen. More...
static void	paintSymbol (QPainter *painter, const QRectF &rect, Symbol symbol=OpenCircle)
	Paints symbol. More...
static QPixmap	pixmap (Symbol symbol)
	Returns black decoration pixmap of plot symbol for use in dialog GUI. More...
static QPixmap	pixmap (QPen pen, Symbol symbol=SolidLine)
	Returns decoration pixmap of plot symbol for use in item lists. More...
static QString	path (const QUrl &urlPlo, const QUrl &url, bool absolute=false)
	Constructs absolute or (if possible) relative file path. More...
static void	resetDashOffset ()
	Resets offset for dashed lines. More...
static unsigned	rgb (const QString &color)
	Converts rgb string to QRgb. More...
static unsigned	rgbQt1 (unsigned rgb)
	Converts QRgb to Qt1 QRgb. More...

Protected Member Functions
void	paintCond (QPainter *painter) const
	Paints or calculates bounding area. More...
Protected Member Functions inherited from ScaledItem
double	length (const double *x, const double *y, int n) const
	Calculates line length. More...
void	plotArray (QPainter *painter, const double *x, const double *y, int n) const
	Plots array. More...
void	setProperties ()
	Sets properties according to transformation matrix. More...
Protected Member Functions inherited from KplItem
QPen &	changePenWidth (QPen &pen, double width) const
	Changes pen width. More...
QPen	createPen (QGraphicsItem *item, unsigned color=0, PenType penType=DataPen, Symbol symbol=SolidLine) const
	Creates pen for plot item. More...
double	penWidth (const QGraphicsItem *item, PenType penType=DataPen) const
	Calculates pen width for plot item. More...
Protected Member Functions inherited from QGraphicsItem
void	updateMicroFocus ()
virtual bool	sceneEventFilter (QGraphicsItem *watched, QEvent *event)
virtual bool	sceneEvent (QEvent *event)
virtual void	contextMenuEvent (QGraphicsSceneContextMenuEvent *event)
virtual void	dragEnterEvent (QGraphicsSceneDragDropEvent *event)
virtual void	dragLeaveEvent (QGraphicsSceneDragDropEvent *event)
virtual void	dragMoveEvent (QGraphicsSceneDragDropEvent *event)
virtual void	dropEvent (QGraphicsSceneDragDropEvent *event)
virtual void	focusInEvent (QFocusEvent *event)
virtual void	focusOutEvent (QFocusEvent *event)
virtual void	hoverEnterEvent (QGraphicsSceneHoverEvent *event)
virtual void	hoverMoveEvent (QGraphicsSceneHoverEvent *event)
virtual void	hoverLeaveEvent (QGraphicsSceneHoverEvent *event)
virtual void	keyPressEvent (QKeyEvent *event)
virtual void	keyReleaseEvent (QKeyEvent *event)
virtual void	mousePressEvent (QGraphicsSceneMouseEvent *event)
virtual void	mouseMoveEvent (QGraphicsSceneMouseEvent *event)
virtual void	mouseReleaseEvent (QGraphicsSceneMouseEvent *event)
virtual void	mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event)
virtual void	wheelEvent (QGraphicsSceneWheelEvent *event)
virtual void	inputMethodEvent (QInputMethodEvent *event)
virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) const
virtual QVariant	itemChange (GraphicsItemChange change, const QVariant &value)
void	prepareGeometryChange ()

Protected Attributes
bool	logXo
int	m_degree
int	m_numKnots
int	m_derivOrder
int	degreeo
int	numKnotso
int	derivOrdero
double	m_xMin
double	m_xMax
double	m_deltaX
double	m_xLow
double	xMino
double	xMaxo
double	deltaXo
double	xLowo
QVector< double >	m_xValues
QVector< double >	m_yValues
QVector< double >	t
QVector< double >	c
Protected Attributes inherited from ScaledItem
FillStyle	m_fillStyle
Symbol	m_symbol
unsigned	m_color
double	m_normX
double	m_normY
double	m_xOffset
double	m_yOffset
double	dydx
double	myDashOffset
QPen	m_pen
QPainterPath	bPath
QRectF	bRect
QRectF	symbRect
QTransform	m_matrix
Protected Attributes inherited from KplItem
double	m_relSize

Additional Inherited Members
Public Attributes inherited from QGraphicsItem
typedef	GraphicsItemFlags
Static Protected Member Functions inherited from KplItem
static double	parentWidth (const QGraphicsItem *item)
	Returns width of item's parent frame or width of scene if the item has no parent item. More...
static double	penWidthFactor (PenType penType)
	Returns factor to calculate pen width from frame width. More...
Static Protected Attributes inherited from KplItem
static double	m_dashOffset

Detailed Description

Spline item class.

Class for smoothing spline items for plotting spline interpolations, derivatives or integrals by lines or markers.

Author

Werner Stille

Member Enumeration Documentation

anonymous enum

Specific QGraphicsItem type number for function type()

Enumerator
Type	Specific QGraphicsItem type number of SplineItem for function type().

Constructor & Destructor Documentation

SplineItem::SplineItem	(	int	degree = 3,
		int	derivOrder = 0,
		double	xLow = 0,
		unsigned	color = 0,
		Symbol	symbol = SolidLine,
		double	fx = 1,
		double	fy = 1,
		QGraphicsItem *	parent = 0,
		double	xMin = 0,
		double	xMax = 0,
		double	deltaX = 0,
		bool	visible = true,
		FillStyle	fillStyle = NoBrush,
		double	xOffset = 0,
		double	yOffset = 0,
		double	relSize = 1
	)

Constructor.

Initializes corresponding to arguments.

Parameters

degree	degree of spline.
derivOrder	order of derivative.
xLow	lower x limit for spline integral.
color	color for plot.
symbol	symbol type.
fx	normalization factor for x values.
fy	normalization factor for y values.
parent	pointer to parent item.
xMin	minimum argument value.
xMax	maximum argument value.
deltaX	argument step size.
visible	true for visible item.
fillStyle	> 0 for filled polygon representation.
xOffset	offset for x values.
yOffset	offset for x values.
relSize	relative size of lines or symbols.

SplineItem::SplineItem

(

const SplineItem &

a

)

Copy constructor.

SplineItem::SplineItem	(	const KConfigGroup *	plo,
		unsigned	color = 0,
		Symbol	symbol = SolidLine,
		QGraphicsItem *	parent = 0
	)

Constructor.

Initializes corresponding to plot file.

Parameters

plo	pointer to KConfigGroup object containing item data.
color	default color for function plot.
symbol	default symbol type.
parent	pointer to parent item.

virtual SplineItem::~SplineItem ( )

virtual

Destructor.

Member Function Documentation

virtual QRectF SplineItem::boundingRect ( ) const

virtual

Calculates bounding rectangle.

Implements QGraphicsItem.

int SplineItem::calcTable

(

bool

logX

)

const

Calculates spline value table.

Parameters

logX	true for logarithmic steps

Returns

number of rows.

int SplineItem::calcTable	(	const double *	x,
		double *	values,
		int	n = 1,
		int	derivOrder = 0,
		double	xLow = 0
	)		const

Calculates spline value table.

Parameters

x	array with x values.
values	array for y values.
n	number of points.
derivOrder	order of derivative.
xLow	lower x limit in case of spline integral.

Returns

error code.

void SplineItem::copySpline

(

const SplineItem *

a

)

Copies spline data.

Parameters

a	pointer to source item.

int SplineItem::degree ( ) const

inline

Returns degree of spline.

double SplineItem::deltaX ( ) const

inline

Returns argument step size.

int SplineItem::derivOrder ( ) const

inline

Returns order of derivative.

void SplineItem::exponent	(	int &	expX,
		int &	expY,
		double &	fx,
		double &	fy,
		bool	logX
	)		const

Calculates normalization factors.

Parameters

expX	reference to logarithm of x normalization factor.
expY	reference to logarithm of x normalization factor.
fx	reference to x normalization factor.
fy	reference to y normalization factor.
logX	true for logarithmic x axis.

void SplineItem::exportTable	(	QTextStream &	stream,
		char	separator,
		char	format,
		int	precision
	)		const

Exports spline value table to file.

Parameters

stream	stream for output file.
separator	column separator character.
format	C format character.
precision	number of digits.

int SplineItem::fit	(	const ArrayItem *	ai,
		double	xMin,
		double	xMax,
		double *	chiSquare = 0,
		int *	numKnots = 0,
		double	smooth = 0,
		FunItem::DataErrorStruct *	err = 0,
		double *	avgErr = 0
	)

Performs smoothing spline fit.

Parameters

ai	pointer to array item.
xMin	lower boundary of approximation interval.
xMax	upper boundary of approximation interval.
chiSquare	chi-square.
numKnots	number of knots.
smooth	smoothing factor.
err	pointer to structure containing the data error settings.
avgErr	average error.

Returns

error code.

int SplineItem::fit	(	const double *	x,
		const double *	y,
		const double *	errors,
		int	n,
		double	xMin,
		double	xMax,
		double *	chiSquare = 0,
		int *	numKnots = 0,
		double	smooth = 0,
		FunItem::DataErrorStruct *	err = 0,
		double *	avgErr = 0
	)

Performs smoothing spline fit.

Parameters

x	array with x values.
y	array with y values.
errors	array with error values.
n	number of points.
xMin	lower boundary of approximation interval.
xMax	upper boundary of approximation interval.
chiSquare	chi-square.
numKnots	number of knots.
smooth	smoothing factor.
err	pointer to structure containing the data error settings.
avgErr	average error.

Returns

error code.

int SplineItem::interpolation	(	const double *	x,
		const double *	y,
		int	n,
		double	xMin,
		double	xMax
	)

Performs interpolating (non-smoothing) spline fit.

Parameters

x	array with x values.
y	array with y values.
n	number of points.
xMin	lower boundary of approximation interval.
xMax	upper boundary of approximation interval.

Returns

error code.

void SplineItem::limits	(	double &	xMin,
		double &	xMax,
		double &	yMin,
		double &	yMax,
		bool	logX
	)		const

Calculates minimum and maximum values.

Parameters

xMin	reference to minimum of x values.
xMax	reference to maximum of x values.
yMin	reference to minimum of y values.
yMax	reference to maximum of y values.
logX	true for logarithmic x axis.

int SplineItem::numKnots ( ) const

inline

Returns number of knots.

virtual void SplineItem::paint ( QPainter *  painter, const QStyleOptionGraphicsItem *  option, QWidget *  widget = 0  )

virtual

Paints item.

Implements QGraphicsItem.

void SplineItem::paintCond ( QPainter *  painter ) const

protected

Paints or calculates bounding area.

Parameters

painter

QPainter object, 0 for calculating bounding area.

int SplineItem::roots	(	QVector< double > &	zero,
		int	derivOrder = 0,
		double	offset = 0
	)		const

Finds roots of a cubic spline or its derivatives.

Parameters

zero	array for roots.
derivOrder	order of derivative.
offset	value of the spline or derivative.

Returns

error code.

void SplineItem::setDashOffset

(

)

Sets offset for dashed lines.

void SplineItem::setDegree ( int  degree )

inline

Sets degree of spline.

Parameters

degree

degree.

void SplineItem::setDeltaX ( double  deltaX )

inline

Sets argument step size.

Parameters

deltaX

step size.

void SplineItem::setDerivOrder ( int  derivOrder )

inline

Sets order of derivative.

Parameters

derivOrder

order.

void SplineItem::setXLow ( double  xLow )

inline

Sets lower x limit for spline integral.

Parameters

xLow	lower x limit.

void SplineItem::setXMax ( double  xMax )

inline

Sets maximum argument value.

Parameters

xMax	maximum argument value.

void SplineItem::setXMin ( double  xMin )

inline

Sets minimum argument value.

Parameters

xMin	minimum argument value.

virtual QPainterPath SplineItem::shape ( ) const

virtual

Returns the shape of the plot item.

Reimplemented from QGraphicsItem.

static int SplineItem::sortArrays ( const double *  x0, const double *  y0, const double *  errors0, int &  n, FunItem::DataErrorStruct *  err, double *  x, double *  y, double *  errors  )

static

Sorts arrays and calculates error column.

Parameters

x0	array with x values.
y0	array with y values.
errors0	array with error values.
n	number of points.
err	pointer to structure containing the data error settings.
x	array for sorted x values.
y	array for y values.
errors	array for error values.

Returns

error code.

virtual int SplineItem::type ( ) const

inlinevirtual

Returns specific QGraphicsItem type number.

Reimplemented from QGraphicsItem.

void SplineItem::writePlo	(	KConfigGroup *	plo,
		char	format,
		int	precision
	)		const

Writes into plot file.

Parameters

plo	KConfigGroup object.
format	C format character.
precision	number of digits.

double SplineItem::xLow ( ) const

inline

Returns lower x limit for spline integral.

double SplineItem::xMax ( ) const

inline

Returns maximum argument value.

double SplineItem::xMin ( ) const

inline

Returns minimum argument value.

double* SplineItem::xValues

(

)

const

Returns pointer to x function value array.

double* SplineItem::yValues

(

)

const

Returns pointer to y function value array.

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

• splineitem.h