Class for data sets described by a script function. More...

#include <ilviews/charts/scriptft.h>

Inheritance diagram for IlvScriptChartFunction:

Public Member Functions
	IlvScriptChartFunction (const char name=0, IlvPointInfoCollection ptInfoCollection=0)
	Constructor. More...

	IlvScriptChartFunction (const IlvCoordInterval &xRange, IlUInt count, const char scriptFunctionName, IlvGraphicHolder holder, const IlSymbol scriptLanguageName=0, const char name=0, IlvPointInfoCollection *ptInfoCollection=0)
	Constructor. More...

virtual	~IlvScriptChartFunction ()
	Destructor. More...

IlBoolean	callScriptFunction (IlDouble x, IlDouble &y) const
	Computes the ordinate value of a data point from the abscissa value. More...

IlvGraphicHolder *	getHolder () const
	Returns the holder in which the script function is defined. More...

virtual void	getPoint (IlUInt i, IlvDoublePoint &point) const
	Returns a data point. More...

IlvScriptContext *	getScriptContext () const
	Returns the script context in which the script function is defined. More...

const char *	getScriptFunctionName () const
	Returns the script function name. More...

const IlSymbol *	getScriptLanguageName () const
	Returns the name of the scripting language used to write the script function. More...

virtual IlBoolean	isFunctionDefined () const
	Indicates whether the script function describing the data is defined. More...

void	setHolder (IlvGraphicHolder *holder)
	Sets the holder in which the script function is defined. More...

void	setScriptFunctionName (const char *name)
	Sets the script function name. More...

void	setScriptLanguageName (const IlSymbol *name)
	Sets the name of the scripting language used to write the script function. More...

Public Member Functions inherited from IlvAbstractChartFunction
virtual IlUInt	getDataCount () const
	Returns the number of defined data items. More...

IlDouble	getXMax () const
	Returns the maximum value considered for the abscissa. More...

IlDouble	getXMin () const
	Returns the minimum value considered for the abscissa. More...

virtual IlBoolean	isIncreasingOnX () const
	Indicates whether the managed data has increasing abscissa values. More...

void	setDataCount (IlUInt count)
	Sets the number of considered data points. More...

void	setXMax (IlDouble max)
	Sets the maximum value considered for the abscissa. More...

void	setXMin (IlDouble min)
	Sets the minimum value considered for the abscissa. More...

virtual void	write (IlvOutputFile &file) const
	Writes the attributes of the current object in a file. More...

Public Member Functions inherited from IlvChartDataSet
virtual	~IlvChartDataSet ()
	Destructor. More...

void	addListener (IlvChartDataSetListener *listener)
	Adds a listener. More...

IlBoolean	addPoint (const IlvDoublePoint &point, IlvChartDataPointInfo *pointInfo=0, IlBoolean copyPointInfo=IlFalse)
	Adds a represented data point (and its associated point information object if any). More...

IlBoolean	areListenersEnabled () const
	Indicates whether the listeners are enabled. More...

virtual IlvChartDataSet *	copy () const =0
	Virtual copy constructor. More...

virtual void	dataAllPointsRemoved ()
	Performs the necessary updates when all data points are removed. More...

virtual void	dataPointAdded (IlUInt position)
	Performs the necessary updates when a new data point is added. More...

virtual void	dataPointChanged (IlUInt ptidx, IlBoolean beforeChange)
	Performs the necessary updates when a data point is changed. More...

virtual void	dataPointRemoved (IlUInt ptidx)
	Performs the necessary updates when a data point is removed. More...

void	enableListeners (IlBoolean b)
	Specifies whether the listeners should be enabled. More...

virtual void	endBatch ()
	Specifies the end of a set of modifications. More...

IlUInt	getAddMaxIdx () const
	Returns the maximum index of the data points that have been added between the first call of the `startBatch()` method and the last call of the `endBatch()` method. More...

IlUInt	getAddMinIdx () const
	Returns the minimum index of the data points that have been added between the first call of the `startBatch()` method and the last call of the `endBatch()` method. More...

void	getBoundingValues (IlvCoordInterval &xRange, IlvCoordInterval &yRange) const
	Returns the bounding values of the managed data. More...

IlvChartDataSetListener const	getListeners (IlUInt &count) const
	Returns all the listeners. More...

IlUInt	getMaxCount () const
	Returns the maximum number of data items that can be managed. More...

const char *	getName () const
	Returns the name of the current data set. More...

IlvChartDataPointInfo *	getPointInfo (IlUInt ptidx) const
	Returns the point information associated with a data item. More...

IlvPointInfoCollection *	getPointInfoCollection () const
	Returns the object used to manage the point information. More...

IlUInt	getPointInfoCount () const
	Returns the number of defined point information items. More...

IlvDoublePoint *	getPoints (IlUInt &count) const
	Returns all the represented data points. More...

virtual IlvDoublePoint *	getPointsBetween (IlUInt indexMin, IlUInt indexMax, IlUInt &count) const
	Returns some of the data points represented by the current data set. More...

virtual IlvDoublePoint *	getPointsInRange (IlUInt &count, IlUInt *&dataPointIndexes, const IlvCoordInterval &xRange, const IlvCoordInterval &yRange, IlBoolean needContinuity) const
	Returns a range of data points represented by the current data set. More...

virtual const IlvCoordInterval &	getXRange () const
	Returns the abscissa bounding values of the managed data. More...

virtual const IlvCoordInterval &	getYRange () const
	Returns the ordinate bounding values of the managed data. More...

virtual IlBoolean	insertPoint (const IlvDoublePoint &point, IlUInt ptidx, IlvChartDataPointInfo *pointInfo=0, IlBoolean copyPointInfo=IlFalse)
	Inserts a represented data point (and its associated point information object if any). More...

virtual IlBoolean	insertPoints (IlUInt count, const IlvDoublePoint points, IlUInt position=IlvLastPositionIndex, IlvChartDataPointInfo const *pInfos=0, IlBoolean copyPointInfo=IlFalse)
	Inserts several represented data points (and their associated point information objects if any). More...

IlBoolean	isLimited () const
	Indicates whether the number of managed data items is limited. More...

virtual IlBoolean	isRemovalAllowed () const
	Indicates whether managed data can be removed. More...

virtual IlBoolean	isWritable () const
	Indicates whether managed data can be modified. More...

void	lock ()
	Locks the current `IlvChartDataSet` object. More...

void	removeAllPointInfo ()
	Removes all the defined point information. More...

virtual void	removeAllPoints ()
	Removes all the represented data points (and their associated point information objects if any). More...

IlvChartDataSetListener *	removeListener (IlvChartDataSetListener *l)
	Removes a listener. More...

void	removeListeners ()
	Removes all the listeners.

virtual IlBoolean	removePointAndInfo (IlUInt ptidx)
	Removes a represented data point (and its associated point information object if any). More...

IlBoolean	removePointInfo (IlUInt ptidx)
	Removes the point information associated with a data item. More...

virtual void	removePointsAndInfo ()
	Removes all the represented data points (and their associated point information objects if any). More...

IlvOutputFile &	save (IlvOutputFile &file) const
	Writes a complete description of the current object in a file. More...

void	setMaxCount (IlUInt maxCount)
	Sets the maximum number of managed data items. More...

void	setName (const char *name)
	Sets the name of the current data set. More...

virtual IlBoolean	setPoint (IlUInt ptidx, const IlvDoublePoint &point)
	Sets a represented data point. More...

IlBoolean	setPointInfo (IlUInt ptidx, IlvChartDataPointInfo *pointInfo, IlBoolean copyPointInfo=IlFalse)
	Sets the point information associated with a data item. More...

void	setPointInfoCollection (IlvPointInfoCollection *ptic)
	Sets the object used to manage the point information. More...

virtual void	startBatch ()
	Specifies the beginning of a set of modifications. More...

void	unLock ()
	Unlocks the current `IlvChartDataSet` object. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvChartDataSet
static IlvChartDataSet *	Load (IlvInputFile &file)
	Reads a data set object from a file. More...

Protected Member Functions inherited from IlvAbstractChartFunction
	IlvAbstractChartFunction (const char name=0, IlvPointInfoCollection ptInfoCollection=0)
	Constructor. More...

	IlvAbstractChartFunction (const IlvCoordInterval &xRange, IlUInt count, const char name=0, IlvPointInfoCollection ptInfoCollection=0)
	Constructor. More...

	IlvAbstractChartFunction (IlvInputFile &file)
	Constructor. More...

	IlvAbstractChartFunction (const IlvAbstractChartFunction &dataSet)
	Constructor. More...

Detailed Description

Class for data sets described by a script function.

Library: ilvcharts

This is a subclass of IlvAbstractChartFunction for which the data points are described by a function of the type y = f(x) defined by a script. The script function is retrieved by using its name and the holder of the script context in which the script function is written.

The abscissa of the nth data point of this data set is obtained by the following formula:

x = ((_xMax - _xMin) / (_dataCount -1)) * i + _xMin,

where _xMin and _xMax are the minimum and the maximum values for the abscissa, and _dataCount is the number of data. The ordinate is equal to f(x).

See Also: IlvAbstractChartFunction, IlvPointInfoCollection, IlvGraphicHolder, IlvScriptContext.

Constructor & Destructor Documentation

IlvScriptChartFunction::IlvScriptChartFunction	(	const char *	name = `0`,
		IlvPointInfoCollection *	ptInfoCollection = `0`
	)

Constructor.

Initializes a new IlvScriptChartFunction object. The script function name, the holder, and the data count are set to 0.
The name of the scripting language used to write the script function is also set to 0. In this case, the scripting language that will be used is the default one. This default language can be obtained by the IlvScriptLanguage::GetDefault method.

Parameters

name	If not `0`, this string becomes the name of the created data set. The name passed as a parameter is copied.
ptInfoCollection	The object used to manage the point information for the created data set.

IlvScriptChartFunction::IlvScriptChartFunction	(	const IlvCoordInterval &	xRange,
		IlUInt	count,
		const char *	scriptFunctionName,
		IlvGraphicHolder *	holder,
		const IlSymbol *	scriptLanguageName = `0`,
		const char *	name = `0`,
		IlvPointInfoCollection *	ptInfoCollection = `0`
	)

Constructor.

Initializes a new IlvScriptChartFunction object.

Parameters

xRange	The interval of values considered for the abscissa.
count	The number of considered data points.
scriptFunctionName	The name of the script function used to define the data points.
holder	The holder that the script context in which the script function is written is associated with. If no holder is specified, the script context that will be used is the global script context.
scriptLanguageName	The name of the scripting language used to write the script function. If no name is specified (that means that scriptFunctionName is equal to `0`), the scripting language that will be used is the default one. This default language can be obtained by the `IlvScriptLanguage::GetDefault` method.
name	If not `0`, this string becomes the name of the created data set. The name passed as a parameter is copied.
ptInfoCollection	The object used to manage the point information for the created data set.

virtual IlvScriptChartFunction::~IlvScriptChartFunction ( )

virtual

Destructor.

The destructor deletes the name of the script function and sets the pointer to the holder stored by the current object to 0.

Member Function Documentation

IlBoolean IlvScriptChartFunction::callScriptFunction	(	IlDouble	x,
		IlDouble &	y
	)		const

Computes the ordinate value of a data point from the abscissa value.

This method calls the defined script function with the parameter x and returns the result of the function in y.

Parameters

x	The abscissa value of a given data point.
y	The computed ordinate of the data point.

Returns: IlTrue if the call of the script function is successful. Otherwise, it returns IlFalse.

IlvGraphicHolder* IlvScriptChartFunction::getHolder ( ) const

Returns the holder in which the script function is defined.

The script function is defined in a given script context. This method returns the holder with which this script context is associated. The holder is used to retrieve the definition of the script function.

Returns: The holder in which the script function is defined.

virtual void IlvScriptChartFunction::getPoint	(	IlUInt	i,
		IlvDoublePoint &	point
	)		const

virtual

Returns a data point.

Returns in point the point of index i for the current data set. This point is defined as follows:

IlDouble x = ((_xMax - _xMin) / ( _dataCount -1)) * i + _xMin;
IlDouble y;
if (isFunctionDefined()) callScriptFunction(x, y);
else y = _yMin;
point.x(x);
point.y(y);

where _xMin and _xMax are the minimum and the maximum values for the abscissa, _dataCount is the number of data considered, and _yMin the minimum value of the ordinate for all the considered data.

Parameters

i	The index of the returned data point.
point	The returned data point.

Implements IlvChartDataSet.

IlvScriptContext* IlvScriptChartFunction::getScriptContext ( ) const

Returns the script context in which the script function is defined.

Returns: The script context in which the script function is defined. The script context is obtained by using the stored holder. Several script contexts may be associated with the holder. The returned script context is the script context using the scripting language whose name is returned by the IlvScriptChartFunction::getScriptLanguageName method or the default scripting language if no name is defined.
If no holder is defined, the returned script context is the global one that can be obtained by a call to the IlvScriptContext::GetGlobal method.

const char* IlvScriptChartFunction::getScriptFunctionName ( ) const

Returns the script function name.

Returns: The name of the script function used to describe the data points for the considered data set. You must not modify or delete the returned string.

const IlSymbol* IlvScriptChartFunction::getScriptLanguageName ( ) const

Returns the name of the scripting language used to write the script function.

Returns: The name of the scripting language used to write the script function or 0 if no name is defined.

Note: If no name of scripting language is defined, the scripting language that will be used is the default one. This default language can be obtained by the IlvScriptLanguage::GetDefault() method.

virtual IlBoolean IlvScriptChartFunction::isFunctionDefined ( ) const

virtual

Indicates whether the script function describing the data is defined.

Returns: IlTrue if the script function describing the data is defined and IlFalse otherwise.

Reimplemented from IlvAbstractChartFunction.

void IlvScriptChartFunction::setHolder ( IlvGraphicHolder * holder )

Sets the holder in which the script function is defined.

The script function is defined in a given script context. This method sets the holder with which this script context is associated. The stored holder allows you to retrieve the definition of the script function.

Parameters

holder The new holder in which the script function is defined.

void IlvScriptChartFunction::setScriptFunctionName ( const char * name )

Sets the script function name.

Parameters

name	The name of the script function used to describe the data points for the considered data set.

void IlvScriptChartFunction::setScriptLanguageName ( const IlSymbol * name )

Sets the name of the scripting language used to write the script function.

Parameters

name	The new name of the scripting language used to write the script function. If name is equal to `0`, the scripting language that will be used is the default one. This default language can be obtained by the `IlvScriptLanguage::GetDefault` method.

Rogue Wave ViewsCharts Package API Reference Guide

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Rogue Wave Views
Charts Package API Reference Guide