Function item class. More...

#include <funitem.h>

Inheritance diagram for FunItem:

Classes
struct	DataErrorStruct
	Data error structure. More...

Public Types
enum	{ Type = UserType + Function }
	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
	FunItem ()
	Constructor. More...

	FunItem (const FunItem &a)
	Copy constructor. More...

	FunItem (const KConfigGroup plo, const KUrl &urlPlo, unsigned color=0, Symbol symbol=SolidLine, QGraphicsItem parent=0)
	Constructor. More...

	FunItem (const KUrl &url, const QString &name, 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...

virtual	~FunItem ()
	Destructor. More...

virtual QRectF	boundingRect () const
	Calculates bounding rectangle. More...

int	calcTable () const
	Calculates function value table. More...

int	calcTable (bool logX) const
	Calculates function value table. More...

double	deltaT () const
	Returns argument step size. 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 function value table to file. More...

const QLibrary *	libY () const
	Returns pointer to library for y function. More...

void	limits (double &xMin, double &xMax, double &yMin, double &yMax, bool logX) const
	Calculates minimum and maximum values. More...

QString	nameY () const
	Returns y function name. More...

virtual void	paint (QPainter painter, const QStyleOptionGraphicsItem option, QWidget *widget=0)
	Paints item. More...

double *	parY ()
	Returns y function parameter array pointer. More...

void	setDashOffset ()
	Sets offset for dashed lines. More...

void	setDeltaT (double deltaT)
	Sets argument step size. More...

bool	setFuncY (const KUrl &url, const QString &name)
	Resolves y function address. More...

virtual void	setPar (int i, double value, bool yFunc=true)
	Sets parameter. More...

void	setTMax (double xMax)
	Sets maximum argument value. More...

void	setTMin (double xMin)
	Sets minimum argument value. More...

virtual QPainterPath	shape () const
	Returns the shape of the plot item. More...

double	tMax () const
	Returns maximum argument value. More...

double	tMin () const
	Returns minimum argument value. More...

const double *	tValues () const
	Returns pointer to argument value array. More...

virtual int	type () const
	Returns specific QGraphicsItem type number. More...

const KUrl &	urlY () const
	Returns URL of y function library. More...

void	writePlo (KConfigGroup *plo, const KUrl &urlPlo, bool absolute, char format, int precision) const
	Writes into plot file. 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 (QFlags< QGraphicsItem::GraphicsItemFlag > 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 (QFlags< Qt::MouseButton > 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)

virtual QRectF	boundingRect () const =0

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

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)

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

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 (QFlags< Qt::InputMethodHint > hints)

void	installSceneEventFilter (QGraphicsItem *filterItem)

void	removeSceneEventFilter (QGraphicsItem *filterItem)

Static Public Member Functions
static void	calcTable (const double x, double values, double(func)(double, const double ), const double par, int n, QObject parent=0)
	Calculates function value table. More...

static bool	errorStructChanged (const DataErrorStruct &e1, const DataErrorStruct &e2)
	Checks data error structures for differences. More...

static int	fit (const QList< const ArrayItem * > aList, QList< FunItem > fList, const bool bFit, double par, QVector< double > resVector=0, QVector< double > sigma=0, FunItem::DataErrorStruct err=0, bool nonLin=true, double tol=1e-14, int itMax=100, LMFit lm=0, double chiSquare=0, double corr=0, double parErr=0, double avgErr=0, QObject parent=0)
	Performs fit of parameters of a set of functions to a set of arrays. More...

static QStringList	funcNames (const KUrl &url)
	Generates sorted list of function names. More...

static bool	getFuncAddr (const QString &path, const QString &name, QLibrary lib, double(func)(double, const double *))
	Gets module handle and address of a shared library function. More...

static bool	parChanged (const double p1, const double p2)
	Checks parameter arrays for differences. More...

static QString	parToString (const double *par, char format, int precision)
	Converts parameter array to string. More...

static void	stringToPar (const QString &s, double *par)
	Converts string to parameter array values. 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 KUrl	absoluteUrl (const QString &path, const KUrl &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 KUrl &urlPlo, const KUrl &url, bool absolute=false)
	Constructs absolute or (if possible) relative file path. More...

static unsigned	rgb (const QString &color)
	Converts rgb string to QRgb. More...

static unsigned	rgbQt1 (unsigned rgb)
	Converts QRgb to Qt1 QRgb. More...

static QString	tempFileName (const QString &suffix=".tmp")
	Generates unique temporary file name. More...

Public Attributes
double(*	funcY )(double, const double *)
	y function. More...

Public Attributes inherited from QGraphicsItem
typedef	GraphicsItemFlags

Static Public Attributes
static const int	NumParMax = 20
	Dimension of parameter arrays. More...

Static Public Attributes inherited from KplItem
static const double	Deg2rad
	Factor for converting from degrees to radians. More...

Protected Member Functions
void	init ()
	Performs initialization. More...

void	paintCond (QPainter *painter) const
	Paints or calculates bounding area. More...

void	unload ()
	Unloads y function library. 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

double	m_tMin

double	m_tMax

double	m_deltaT

double	tMino

double	tMaxo

double	deltaTo

double(*	funcYo )(double, const double *)

double	m_parY [NumParMax]

double	parYo [NumParMax]

QVector< double >	m_tValues

QVector< double >	m_yValues

QString	m_nameY

KUrl	m_urlY

QLibrary *	m_libY

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

QPen	m_pen

QPainterPath	bPath

QRectF	bRect

QRectF	symbRect

QTransform	m_matrix

Protected Attributes inherited from KplItem
double	m_relSize

Additional Inherited Members
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

Function item class.

Class for function items showing ordinary functions 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 FunItem for function type().

Constructor & Destructor Documentation

FunItem::FunItem ( )

Constructor.

FunItem::FunItem ( const FunItem & a )

Copy constructor.

Parameters

a	source item.

FunItem::FunItem	(	const KConfigGroup *	plo,
		const KUrl &	urlPlo,
		unsigned	color = `0`,
		Symbol	symbol = `SolidLine`,
		QGraphicsItem *	parent = `0`
	)

Constructor.

Initializes corresponding to plot file.

Parameters

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

FunItem::FunItem	(	const KUrl &	url,
		const QString &	name,
		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

url	URL of the function library.
name	function name.
color	color for function 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, 0 for automatic.
visible	true for visible item.
fillStyle	fill style.
xOffset	offset for x values.
yOffset	offset for x values.
relSize	relative size of lines or symbols.

virtual FunItem::~FunItem ( )

virtual

Destructor.

Member Function Documentation

virtual QRectF FunItem::boundingRect ( ) const

virtual

Calculates bounding rectangle.

Reimplemented in ParFunItem.

static void FunItem::calcTable	(	const double *	x,
		double *	values,
		double()(double, const double )	func,
		const double *	par,
		int	n,
		QObject *	parent = `0`
	)

static

Calculates function value table.

Parameters

x	array with argument values.
values	array for function values.
func	function.
par	parameter array.
n	number of values.
parent	pointer to parent QObject.

int FunItem::calcTable ( ) const

Calculates function value table.

Returns: number of rows.

int FunItem::calcTable ( bool logX ) const

Calculates function value table.

Parameters

logX	true for logarithmic steps

Returns: number of rows.

double FunItem::deltaT ( ) const

inline

Returns argument step size.

static bool FunItem::errorStructChanged	(	const DataErrorStruct &	e1,
		const DataErrorStruct &	e2
	)

static

Checks data error structures for differences.

Parameters

e1	first data error structure.
e2	second data error structure.

Returns: true for different structure contents.

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

Exports function value table to file.

Parameters

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

static int FunItem::fit	(	const QList< const ArrayItem * > *	aList,
		QList< FunItem * > *	fList,
		const bool *	bFit,
		double *	par,
		QVector< double > *	resVector = `0`,
		QVector< double > *	sigma = `0`,
		FunItem::DataErrorStruct *	err = `0`,
		bool	nonLin = `true`,
		double	tol = `1e-14`,
		int	itMax = `100`,
		LMFit *	lm = `0`,
		double *	chiSquare = `0`,
		double *	corr = `0`,
		double *	parErr = `0`,
		double *	avgErr = `0`,
		QObject *	parent = `0`
	)

static

Performs fit of parameters of a set of functions to a set of arrays.

Parameters

aList	array item list.
fList	function item list.
bFit	array containing true values for parameters to be fitted.
par	parameter array.
resVector	array for weighted residuals.
sigma	array for data errors.
err	array of structures containing the data error settings.
nonLin	true for nonlinear fit.
tol	tolerance value for stopping nonlinear fit iterations.
itMax	maximum number of nonlinear fit iterations.
lm	object for Levenberg-Marquardt fits.
chiSquare	chi-square.
corr	array for parameter correlation matrix.
parErr	array for parameter erros.
avgErr	average error.
parent	parent object for lm.

Returns: error code.

static QStringList FunItem::funcNames ( const KUrl & url )

static

Generates sorted list of function names.

Parameters

url	URL of function library.

Returns: list of names.

static bool FunItem::getFuncAddr	(	const QString &	path,
		const QString &	name,
		QLibrary **	lib,
		double(*)(double, const double )	func
	)

static

Gets module handle and address of a shared library function.

Parameters

path	path of the library.
name	function name.
lib	pointer to library.
func	pointer to function address.

Returns: true for success.

void FunItem::init ( )

protected

Performs initialization.

const QLibrary* FunItem::libY ( ) const

inline

Returns pointer to library for y function.

void FunItem::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.

QString FunItem::nameY ( ) const

inline

Returns y function name.

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

virtual

Paints item.

Reimplemented in ParFunItem.

void FunItem::paintCond ( QPainter * painter ) const

protected

Paints or calculates bounding area.

Parameters

painter QPainter object, 0 for calculating bounding area.

static bool FunItem::parChanged	(	const double *	p1,
		const double *	p2
	)

static

Checks parameter arrays for differences.

Parameters

p1	first parameter array.
p2	second parameter array.

Returns: true for different array contents.

static QString FunItem::parToString	(	const double *	par,
		char	format,
		int	precision
	)

static

Converts parameter array to string.

Parameters

par	parameter array.
format	C format character.
precision	number of digits.

Returns: space separated string.

double* FunItem::parY ( )

inline

Returns y function parameter array pointer.

void FunItem::setDashOffset ( )

Sets offset for dashed lines.

void FunItem::setDeltaT ( double deltaT )

inline

Sets argument step size.

Parameters

deltaT step size.

bool FunItem::setFuncY	(	const KUrl &	url,
		const QString &	name
	)

Resolves y function address.

Parameters

url	url of the function library.
name	function name.

Returns: true for success.

virtual void FunItem::setPar	(	int	i,
		double	value,
		bool	yFunc = `true`
	)

virtual

Sets parameter.

Parameters

i	parameter index.
value	value.
yFunc	true for y value function.

Reimplemented in ParFunItem.

void FunItem::setTMax ( double xMax )

inline

Sets maximum argument value.

Parameters

xMax	maximum value.

void FunItem::setTMin ( double xMin )

inline

Sets minimum argument value.

Parameters

xMin	maximum value.

virtual QPainterPath FunItem::shape ( ) const

virtual

Returns the shape of the plot item.

Reimplemented from QGraphicsItem.

static void FunItem::stringToPar	(	const QString &	s,
		double *	par
	)

static

Converts string to parameter array values.

Parameters

s	string.
par	parameter array.

double FunItem::tMax ( ) const

inline

Returns maximum argument value.

double FunItem::tMin ( ) const

inline

Returns minimum argument value.

const double* FunItem::tValues ( ) const

Returns pointer to argument value array.

virtual int FunItem::type ( ) const

inlinevirtual

Returns specific QGraphicsItem type number.

Reimplemented from QGraphicsItem.

Reimplemented in ParFunItem.

void FunItem::unload ( )

protected

Unloads y function library.

const KUrl& FunItem::urlY ( ) const

inline

Returns URL of y function library.

void FunItem::writePlo	(	KConfigGroup *	plo,
		const KUrl &	urlPlo,
		bool	absolute,
		char	format,
		int	precision
	)		const

Writes into plot file.

Parameters

plo	KConfigGroup object.
urlPlo	URL of plot file.
absolute	true to save absolute paths.
format	C format character.
precision	number of digits.

double* FunItem::yValues ( ) const

Returns pointer to y function value array.

Member Data Documentation

double(* FunItem::funcY)(double, const double *)

y function.

const int FunItem::NumParMax = 20

static

Dimension of parameter arrays.

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

funitem.h

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