IlvAbstractChartDisplayer Class Reference

Abstract base class for data display. More...

#include <ilviews/charts/display.h>

Inheritance diagram for IlvAbstractChartDisplayer:

List of all members.

Public Member Functions
virtual	~IlvAbstractChartDisplayer ()
	Destructor.
void	addDataSet (IlvChartDataSet *dataSet)
	Adds a real data set to be displayed by the current displayer.
virtual IlBoolean	boundingBox (IlvRect &bbox, const IlvTransformer *t=0) const =0
	Returns the bounding box of the graphical representation of data.
virtual IlBoolean	canBeProjectedIfOutOfBounds () const
	Indicates whether the graphical representation can be projected when it is out-of-bounds.
virtual IlvAbstractChartDisplayer *	copy () const =0
	Virtual copy constructor.
virtual IlBoolean	dataPointBBox (IlUInt dataPtIdx, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const =0
	Returns the bounding box of the graphical representation of the data points at a given index.
IlBoolean	dataPointToDisplay (const IlvDoublePoint &dataPoint, IlvPoint &point, const IlvTransformer *t=0) const
	Projects a data point into screen coordinates.
virtual IlBoolean	displayDataSet (const IlvChartDataSet *dataSet) const
	Indicates whether the current displayer displays a data set.
IlBoolean	displayToDataPoint (const IlvPoint &point, IlvDoublePoint &dataPoint, const IlvTransformer *t=0) const
	Inversely projects a screen point to retrieve the corresponding data point.
virtual void	draw (IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const =0
	Draws the graphical representation of data.
virtual void	drawDataPoint (IlUInt dataPtIdx, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const =0
	Draws the graphical representation of the data point(s) at a given index.
virtual void	drawDataPoints (IlUInt iMin, IlUInt iMax, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const =0
	Draws the graphical representation of the data points between a given interval.
virtual void	drawFill (IlBoolean b)=0
	Sets the filling mode of the displayer.
virtual void	drawLegendItem (IlvPort *dst, const IlvRect &legendArea, IlvPalette *itemPal, const IlvRegion *clip, IlAny clientData=0) const =0
	Draws the graphic part of a legend item associated with the current displayer.
virtual IlvColor *	getBackground (IlUInt index=0) const =0
	Returns the background color of a palette used by the current displayer to display data.
IlvChartGraphic *	getChartGraphic () const
	Returns the chart graphic which uses the current displayer.
virtual void	getClipArea (IlvRect &area, const IlvTransformer *t) const =0
	Returns the clipping region that is used for the drawing.
IlvChartDataSet *	getDataSet (IlUInt index=0) const
	Returns a data set used by the current displayer.
IlUInt	getDataSetsCount () const
	Returns the number of data sets used by the current displayer.
virtual IlUInt	getDisplayersCount () const =0
	Returns the number of displayers.
virtual IlUInt	getDisplayItem (IlvChartDataSet *&dataSet, const IlvPoint &viewPoint, const IlvTransformer *t) const =0
	Returns the item to which a view point corresponds.
virtual IlBoolean	getDisplayPoint (const IlvChartDataSet *dataSet, IlUInt dataPtIdx, IlvPoint &point, const IlvTransformer *t=0) const =0
	Returns the corresponding screen point for a data point.
virtual IlvColor *	getForeground (IlUInt index=0) const =0
	Returns the foreground color of a palette used by the current displayer to display data.
virtual const char *	getInternalLegendText (IlUInt index=0) const =0
	Returns the legend text stored in the current displayer.
virtual const char *	getLegendText (IlUInt index=0) const =0
	Returns the text that will be used in a legend for the current displayer.
IlUInt	getMaxDataSetsCount () const
	Returns the maximum number of real data sets that the current displayer is allowed to display.
const char *	getName () const
	Returns the name of the current displayer.
virtual IlUInt	getNearestPoint (IlvChartDataSet *&dataSet, const IlvPoint &viewPoint, IlvDim distance, IlvPoint &point, const IlvTransformer *t=0) const =0
	Returns the nearest data point.
IlvCoordinateInfo *	getOrdinateInfo () const
	Deprecated Returns the coordinate information associated with the ordinate scale considered to display data.
virtual IlvPalette *	getPalette (IlUInt index=0) const =0
	Returns a palette used by the current displayer to display data.
const IlvCompositeChartDisplayer *	getParentDisplayer () const
	Returns the parent displayer.
virtual IlvChartDataPointInfo *	getPointInfo (IlUInt dataPtIdx, const IlvChartDataSet *dataSet=0) const
	Returns the point information associated with a given data point.
virtual IlvPointInfoCollection *	getPointInfoCollection (const IlvChartDataSet *dataSet) const =0
	Returns the point information collection defined to be used to display a given data set.
virtual IlvPalette *	getProjectedPointsPalette () const
	Returns the palette used to display out-of-bounds values.
IlvChartDataSet *	getRealDataSet (IlUInt index=0) const
	Returns a real data set to be displayed by the current displayer.
IlUInt	getRealDataSetsCount () const
	Returns the number of real data sets.
virtual IlvCombinedChartDataSet *	getVirtualDataSet (const IlvChartDataSet *dataSet, IlUInt &index) const
	Returns a virtual data set used by the current displayer.
virtual IlBoolean	graphicalRepresentationByDataPoint () const
	Indicates whether there is a graphical representation by data point.
virtual void	insertDataSet (IlvChartDataSet *dataSet, IlUInt index=IlvLastPositionIndex)
	Inserts a real data set to be displayed by the current displayer.
virtual IlBoolean	isContinuous () const
	Indicates whether the graphical representation is continuous.
virtual IlBoolean	isFilled () const
	Indicates whether the graphical representation is filled.
virtual IlBoolean	isViewable () const
	Indicates whether the graphical representation can be viewed.
IlBoolean	isVisible () const
	Indicates whether the graphical representation is visible.
virtual void	removeDataSet (IlvChartDataSet *dataSet)
	Removes a real data set from the data sets to be displayed by the current displayer.
virtual void	removeDataSets ()
	Removes all the real data sets to be displayed by the current displayer.
void	removePointInfoCollection (const IlvChartDataSet *dataSet)
	Removes the point information collection defined to be used to display a given data set.
virtual IlBoolean	replaceDataSet (IlvChartDataSet *oldDataSet, IlvChartDataSet *newDataSet)
	Replaces a real data set with another one.
IlvOutputFile &	save (IlvOutputFile &file) const
	Writes a complete description of the current object in a file.
virtual void	setBackground (IlvColor *color, IlUInt index=0)=0
	Sets the background color of a palette used by the current displayer to display data.
virtual void	setChartGraphic (IlvChartGraphic *chart)
	Sets the chart graphic which uses the current displayer.
virtual IlBoolean	setDataPoint (IlvChartDataSet *dataSet, IlUInt dataPtIdx, const IlvPoint &point, const IlvTransformer *t=0) const =0
	Sets the corresponding data point from a screen point.
void	setDataSet (IlvChartDataSet *dataSet, IlvPalette *palette, IlUInt index=0)
	Sets a real data set to be displayed by the current displayer.
virtual void	setDataSet (IlvChartDataSet *dataSet, IlUInt index=0)
	Sets a real data set to be displayed by the current displayer.
virtual void	setDataSets (IlUInt count, IlvChartDataSet *const *dataSets)
	Sets the real data sets to be displayed by the current displayer.
virtual void	setForeground (IlvColor *color, IlUInt index=0)=0
	Sets the foreground color of a palette used by the current displayer to display data.
virtual void	setLegendItems (IlvChartLegend *legend) const =0
	Sets the legend items associated with the current displayer.
virtual void	setLegendText (const char *text, IlUInt index=0)=0
	Sets the text that will be used in a legend for the current displayer.
virtual void	setMode (IlvDrawMode mode)=0
	Sets the drawing mode.
void	setName (const char *name)
	Sets the name of the current displayer.
virtual void	setOrdinateInfo (IlvCoordinateInfo *ordinateInfo)
	Sets the coordinate information associated with the ordinate scale considered to display data.
virtual void	setOverwrite (IlBoolean o)=0
	Sets the overwrite mode.
virtual void	setPalette (IlvPalette *pal, IlUInt index=0)=0
	Sets a palette used by the current displayer to display data.
void	setParentDisplayer (const IlvCompositeChartDisplayer *displayer)
	Sets the parent displayer.
virtual void	setPointInfoCollection (const IlvChartDataSet *dataSet, IlvPointInfoCollection *ptInfoCollection)=0
	Sets the point information collection that will be used to display a given data set.
void	setVirtualDataSet (IlvCombinedChartDataSet *vDataSet, IlUInt index=0)
	Sets a virtual data set used by the current displayer.
void	setVisible (IlBoolean visible)
	Specifies whether the graphical representation is visible.
virtual IlBoolean	useVirtualDataSets () const
	Indicates whether the current displayer uses virtual data sets.
virtual void	write (IlvOutputFile &file) const
	Writes the attributes of the current object in a file.
Static Public Member Functions
static IlvAbstractChartDisplayer *	Load (IlvInputFile &file)
	Reads a displayer object from a file.
Protected Member Functions
	IlvAbstractChartDisplayer (IlvInputFile &file)
	Constructor.
	IlvAbstractChartDisplayer (const IlvAbstractChartDisplayer &displayer)
	Constructor.
	IlvAbstractChartDisplayer ()
	Constructor.
virtual void	dataSetAdded (IlUInt position=IlvLastPositionIndex)
	Performs the updates needed when a real data set is added.
virtual void	dataSetRemoved (IlUInt index)
	Performs the updates needed when a real data set is removed.
virtual void	update ()
	Performs the updates needed when modifications (removing, adding, replacing) are made to the real data sets.
virtual void	updateVirtualDataSets ()
	Updates the virtual data sets.

---

Detailed Description

Abstract base class for data display.

Library: ilvcharts

This abstract class defines a given type of graphical representation of data that is used within a chart. For example, data can be represented by markers, by polylines, and so on.

Each type of graphical representation of data is displayed within a chart by an instance of a derived class of IlvAbstractChartDisplayer. These objects that allow you to represent data in a specific way are commonly called displayers.

The displayers are divided into two categories:

• displayers that display data with a single basic rendering shape. For example, these are the displayers representing data with markers, polylines, bars, and so on.

  These displayers are all instances of subclasses of the IlvSingleChartDisplayer class, which is a subclass of IlvAbstractChartDisplayer.

• displayers that display data with a composition of several rendering shapes, thus allowing you to represent more complex graphical representations of data. For example, these displayers represent data with stacked bars or with stock charts. The stacked-bar displayer (see the IlvStackedBarChartDisplayer class) is composed of several single displayers that represent data with bars (see the IlvBarChartDisplayer class). The stock-chart displayer (see the IlvHiLoOpenCloseChartDisplayer class) is composed of a single displayer that represents data with a high-low chart (see the IlvHiLoChartDisplayer class) and a single displayer that displays data with a high-low bar chart (see the IlvHiLoBarChartDisplayer class).

  These displayers are all instances of subclasses of the IlvCompositeChartDisplayer class, which is a subclass of IlvAbstractChartDisplayer. They are defined as a composition of other displayers that can be single or composite displayers.

A displayer can be used to display one or several data sets, depending on the type of the displayer. (See the IlvChartDataSet class for details about the data sets.) For example, a displayer that displays data with bars displays a unique data set, and a displayer that displays data with a high-low chart displays at least two data sets. For a given displayer, there are two kinds of data sets:

• The real data sets are the data sets to be displayed with this displayer and that are set on this displayer. These data sets are stored in the object managing data sets that is set on the chart using this displayer.

• The virtual data sets are the data sets constructed just for the needs of the drawing from the real data sets that are to be displayed with the current displayer.

  Virtual data sets are not constructed in each displayer. Virtual data sets are constructed only in displayer types that cannot directly display the real data sets to be displayed but that need to put the data into another format before being able to display them. This is the case, for example, for the pie displayer that needs a specific virtual data set to internally transform the data set into a set of angle values that will then be displayed by the pie displayer.

  The virtual data sets that are constructed inside the displayers are defined as a combination of the real data sets. (See the IlvCombinedChartDataSet class for more details.)

  If virtual data sets are defined for a given displayer, these data sets, constructed from the real data sets that are set on the displayer, will be displayed by the displayer. Otherwise, the displayer will directly display the real data sets that are set on it.

The current class stores a pointer to the chart graphic that uses it to display data and a pointer to a possible parent displayer. For a given displayer, the parent displayer corresponds to the composite displayer that uses this displayer if the displayer is used by a composite displayer.

See also:

IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvChartGraphic, IlvChartDataSet, IlvCombinedChartDataSet.

---

Constructor & Destructor Documentation

virtual IlvAbstractChartDisplayer::~IlvAbstractChartDisplayer

(

)

[virtual]

Destructor.

The destructor sets the pointers to the chart graphic that uses the current displayer and to the parent displayer if it is defined to 0.

IlvAbstractChartDisplayer::IlvAbstractChartDisplayer

(

)

[protected]

Constructor.

Initializes a new IlvAbstractChartDisplayer instance. By default, the Boolean that indicates the visibility is set to IlTrue. The name, the pointers to the chart graphic that uses the current displayer, and the pointers to the parent displayer are set to 0.

IlvAbstractChartDisplayer::IlvAbstractChartDisplayer

(

const IlvAbstractChartDisplayer &

displayer

)

[protected]

Constructor.

Initializes a new IlvAbstractChartDisplayer instance as a copy of displayer.

Parameters:

displayer

The object used to initialize the current one.

IlvAbstractChartDisplayer::IlvAbstractChartDisplayer

(

IlvInputFile &

file

)

[protected]

Constructor.

Initializes a new IlvAbstractChartDisplayer instance from the description read in the input file named file.

Parameters:

file

The file used to initialize the current displayer.

---

Member Function Documentation

void IlvAbstractChartDisplayer::addDataSet

(

IlvChartDataSet *

dataSet

)

Adds a real data set to be displayed by the current displayer.

Adds a data set at the end of the collection of data sets to be displayed by the current displayer.

Parameters:

dataSet

The data set to add.

virtual IlBoolean IlvAbstractChartDisplayer::boundingBox	(	IlvRect &	bbox,
		const IlvTransformer *	t = 0
	)			const [pure virtual]

Returns the bounding box of the graphical representation of data.

Parameters:

	bbox	The bounding box of the graphical representation of data displayed by the current displayer.
	t	The transformer that is applied to the returned bounding box.

Returns:

IlTrue if the bounding box has been successfully computed and IlFalse otherwise.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::canBeProjectedIfOutOfBounds

(

)

const [virtual]

Indicates whether the graphical representation can be projected when it is out-of-bounds.

This method returns IlTrue if the graphical representation displayed by the current displayer can be projected when it is out-of-bounds and IlFalse otherwise.

Returns:

IlFalse by default.

Reimplemented in IlvPolylineChartDisplayer.

virtual IlvAbstractChartDisplayer* IlvAbstractChartDisplayer::copy

(

)

const [pure virtual]

Virtual copy constructor.

Creates and returns a copy of the current object. This method must be overloaded in subclasses. It is automatically declared by the DeclareChartDisplayerTypeInfo macro. The IlvPredefinedChartDisplayerIOMembers macro lets you define a default implementation, which returns an instance initialized with the copy constructor.

Returns:

A copy of the current object.

Implemented in IlvPieChartDisplayer, IlvPolylineChartDisplayer, IlvPolygonChartDisplayer, IlvStepChartDisplayer, IlvFixedStepChartDisplayer, IlvStairChartDisplayer, IlvScatterChartDisplayer, IlvMarkedPolylineChartDisplayer, IlvSideBySideChartDisplayer, IlvSideBySideBarChartDisplayer, IlvStackedChartDisplayer, IlvStackedBarChartDisplayer, IlvStackedPolygonChartDisplayer, and IlvStacked3dBarChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::dataPointBBox	(	IlUInt	dataPtIdx,
		IlvRect &	bbox,
		IlBoolean	takeInfoIntoAccount = IlTrue,
		const IlvTransformer *	t = 0
	)			const [pure virtual]

Returns the bounding box of the graphical representation of the data points at a given index.

Parameters:

	dataPtIdx	The index of the data point(s) for which we want to get the bounding box of their graphical representation.
	bbox	The returned bounding box of the graphical representation of the data point(s).
	takeInfoIntoAccount	A Boolean value indicating whether the point information must be taken into account when the bounding box is computed.
	t	The transformer that is applied to the bounding box.

Returns:

IlTrue if the bounding box has been successfully computed and IlFalse otherwise.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

IlBoolean IlvAbstractChartDisplayer::dataPointToDisplay	(	const IlvDoublePoint &	dataPoint,
		IlvPoint &	point,
		const IlvTransformer *	t = 0
	)			const

Projects a data point into screen coordinates.

Parameters:

	dataPoint	The data point to project into screen coordinates.
	point	The corresponding screen point.
	t	The optional transformer that is applied to the computed screen point.

Returns:

IlTrue if the computation has been successfully performed and IlFalse otherwise.

Warning:

[note] The data point passed as a parameter to this method belongs to a real data set that is displayed by the current displayer if the current displayer does not use virtual data sets. Otherwise, it belongs to a virtual data set used by the current displayer.

virtual void IlvAbstractChartDisplayer::dataSetAdded

(

IlUInt

position = IlvLastPositionIndex

)

[protected, virtual]

Performs the updates needed when a real data set is added.

Parameters:

position

The index at which the data set is added.

virtual void IlvAbstractChartDisplayer::dataSetRemoved

(

IlUInt

index

)

[protected, virtual]

Performs the updates needed when a real data set is removed.

This method just calls the IlvAbstractChartDisplayer::update method.

Parameters:

index

The index of the removed data set.

Reimplemented in IlvSideBySideChartDisplayer, and IlvStackedChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::displayDataSet

(

const IlvChartDataSet *

dataSet

)

const [virtual]

Indicates whether the current displayer displays a data set.

This method returns IlTrue if the data set dataSet is one of the real data sets to be displayed by the current displayer or one of the virtual data sets used by this displayer. Otherwise, it returns IlFalse.

Parameters:

dataSet

The data set for which we want to know whether it is displayed by the current displayer.

Returns:

IlTrue if the data set dataSet is displayed by the current displayer and IlFalse otherwise.

IlBoolean IlvAbstractChartDisplayer::displayToDataPoint	(	const IlvPoint &	point,
		IlvDoublePoint &	dataPoint,
		const IlvTransformer *	t = 0
	)			const

Inversely projects a screen point to retrieve the corresponding data point.

Parameters:

	dataPoint	The data point retrieved from the screen point point.
	point	The screen point that is inversely projected to retrieve the corresponding data point.
	t	The transformer that has already been applied to point.

Returns:

IlTrue if the computation has been successfully performed and IlFalse otherwise.

virtual void IlvAbstractChartDisplayer::draw	(	IlvPort *	dst,
		const IlvTransformer *	t = 0,
		const IlvRegion *	clip = 0
	)			const [pure virtual]

Draws the graphical representation of data.

Draws the graphical representation of data in the given IlvPort dst using the transformer t and the clipping region clip. In the case of a composite displayer, the draw method is called for each child displayer that composes the composite displayer.

Parameters:

	dst	The port used for the drawing.
	t	The optional transformer.
	clip	The optional clipping region.

Implemented in IlvSingleChartDisplayer, IlvCompositeChartDisplayer, and IlvStackedChartDisplayer.

virtual void IlvAbstractChartDisplayer::drawDataPoint	(	IlUInt	dataPtIdx,
		IlvPort *	dst,
		const IlvTransformer *	t = 0,
		const IlvRegion *	clip = 0
	)			const [pure virtual]

Draws the graphical representation of the data point(s) at a given index.

Draws the graphical representation of the data point(s) at the index dataPtIdx in the data set(s) to be displayed by the current displayer. The drawing is performed in the port dst using the transformer t, and the clipping region clip.

Parameters:

	dataPtIdx	The index of the data point(s) to draw.
	dst	The port used for the drawing.
	t	The optional transformer.
	clip	The optional clipping region.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::drawDataPoints	(	IlUInt	iMin,
		IlUInt	iMax,
		IlvPort *	dst,
		const IlvTransformer *	t = 0,
		const IlvRegion *	clip = 0
	)			const [pure virtual]

Draws the graphical representation of the data points between a given interval.

Draws the graphical representation of the data points between the indexes iMin and iMax in the data set(s) to be displayed by the current displayer. The drawing is performed in the port dst using the transformer t and the clipping region clip.

Parameters:

	iMin	The minimum index used to select the data points to draw.
	iMax	The maximum index used to select the data points to draw.
	dst	The port used for the drawing.
	t	The optional transformer.
	clip	The optional clipping region.

Warning:

[note] For handling the needs of chart drawing, iMin is decreased by 1 and iMax is increased by 1 before selecting the data points whenever possible. This ensures continuity when drawing the chart, especially when polylines are used.

This method is simplified for performance reasons and does not work if the data have to be shifted by the cycle length before being displayed. If the data must be shifted, you have to use the IlvAbstractChartDisplayer::drawDataPoint method, which works for all cases.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::drawFill

(

IlBoolean

b

)

[pure virtual]

Sets the filling mode of the displayer.

This method tells the displayer whether the shape to render must be filled (using the background color of the palette) or simply outlined. In the case of a composite displayer, the new mode is propagated to all the child displayers.

Parameters:

b

The new value of the Boolean indicating if the shape is to be filled (IlTrue) or only outlined (IlFalse).

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::drawLegendItem	(	IlvPort *	dst,
		const IlvRect &	legendArea,
		IlvPalette *	itemPal,
		const IlvRegion *	clip,
		IlAny	clientData = 0
	)			const [pure virtual]

Draws the graphic part of a legend item associated with the current displayer.

The drawing is performed in the port dst using the clipping region clip. It is bounded by the rectangle legendArea.

Parameters:

	dst	The port used for the drawing.
	legendArea	The area where the drawing is performed.
	itemPal	The palette of the legend item associated with the current displayer.
	clip	The optional clipping region.
	clientData	The client data defined for the legend item associated with the current displayer.

Implemented in IlvBubbleChartDisplayer, IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvHiLoChartDisplayer, IlvHiLoBarChartDisplayer, IlvPieChartDisplayer, IlvPolylineChartDisplayer, IlvPolygonChartDisplayer, IlvStepChartDisplayer, IlvFixedStepChartDisplayer, IlvStairChartDisplayer, and IlvScatterChartDisplayer.

virtual IlvColor* IlvAbstractChartDisplayer::getBackground

(

IlUInt

index = 0

)

const [pure virtual]

Returns the background color of a palette used by the current displayer to display data.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just returns the background color of the palette stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method returns the background color of the palette used by the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

index

If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Returns:

A pointer to the background color.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

IlvChartGraphic* IlvAbstractChartDisplayer::getChartGraphic

(

)

const

Returns the chart graphic which uses the current displayer.

Returns:

A pointer to the chart graphic which uses the current displayer.

virtual void IlvAbstractChartDisplayer::getClipArea	(	IlvRect &	area,
		const IlvTransformer *	t
	)			const [pure virtual]

Returns the clipping region that is used for the drawing.

Parameters:

	area	The clipping region that is used to clip the graphical representation of data drawn by the current displayer.
	t	The transformer that is applied to the returned clipping region.

Implemented in IlvBarChartDisplayer, Ilv3dBarChartDisplayer, IlvBubbleChartDisplayer, IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvHiLoChartDisplayer, IlvPieChartDisplayer, IlvFixedStepChartDisplayer, and IlvScatterChartDisplayer.

IlvChartDataSet* IlvAbstractChartDisplayer::getDataSet

(

IlUInt

index = 0

)

const

Returns a data set used by the current displayer.

The returned data set corresponds to the data set at the index index among the virtual data sets if the current displayer uses virtual data sets. (See the IlvAbstractChartDisplayer::useVirtualDataSets method.) Otherwise, it corresponds to the data set at the index index among the real data sets to be displayed by the current displayer.

Parameters:

index

The index of the returned data set.

Returns:

A pointer to the returned data set.

IlUInt IlvAbstractChartDisplayer::getDataSetsCount

(

)

const

Returns the number of data sets used by the current displayer.

This number of data sets corresponds to the number of virtual data sets if the current displayer uses virtual data sets. (See the IlvAbstractChartDisplayer::useVirtualDataSets method.) Otherwise, it corresponds to the number of real data sets to be displayed by the current displayer.

Returns:

The number of data sets used by the current displayer.

virtual IlUInt IlvAbstractChartDisplayer::getDisplayItem	(	IlvChartDataSet *&	dataSet,
		const IlvPoint &	viewPoint,
		const IlvTransformer *	t
	)			const [pure virtual]

Returns the item to which a view point corresponds.

Returns the index of the data point in the data set dataSet displayed by the current displayer that has its corresponding representation colliding with the point viewPoint. The returned index is equal to IlvBadIndex if no data point has been found. If the data set dataSet passed as a parameter is equal to 0, the nearest data point is searched for in all the data sets displayed by the current displayer. Otherwise, it is searched for in the data set dataSet. At the end, dataSet references the data set in which the data point has been found or 0 if no data set has been found. If no point has been found in a data set, dataSet is also equal to 0.

Parameters:

	dataSet	The data set from which a data point is retrieved.
	viewPoint	The point in screen coordinates for which we want to get the nearest displayed data point.
	point	The screen point corresponding to the nearest data point that has been found.
	t	The optional transformer.

Returns:

The index of the nearest data point that has been found.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::getDisplayPoint	(	const IlvChartDataSet *	dataSet,
		IlUInt	dataPtIdx,
		IlvPoint &	point,
		const IlvTransformer *	t = 0
	)			const [pure virtual]

Returns the corresponding screen point for a data point.

Returns in point the point in screen coordinates corresponding to the data point at the index dataPtIdx in the data set data set to be displayed by the current displayer.

Parameters:

	dataSet	The data set to which the considered data point belongs.
	dataPtIdx	The index of the considered data point in the data set dataSet.
	point	The screen point corresponding to the considered data point.
	t	The transformer that is applied to the returned screen point.

Returns:

IlTrue if the corresponding screen point has been successfully computed and IlFalse otherwise.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual IlvColor* IlvAbstractChartDisplayer::getForeground

(

IlUInt

index = 0

)

const [pure virtual]

Returns the foreground color of a palette used by the current displayer to display data.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just returns the foreground color of the palette stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method returns the foreground color of the palette used by the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

index

If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Returns:

A pointer to the foreground color.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual const char* IlvAbstractChartDisplayer::getInternalLegendText

(

IlUInt

index = 0

)

const [pure virtual]

Returns the legend text stored in the current displayer.

This text, if it is defined, is used in a legend as comments for the data represented by the current displayer. (See the IlvAbstractChartDisplayer::getLegendText method.) If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just returns the legend text stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method returns the legend text stored for the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

index

If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Returns:

The legend text that is stored.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual const char* IlvAbstractChartDisplayer::getLegendText

(

IlUInt

index = 0

)

const [pure virtual]

Returns the text that will be used in a legend for the current displayer.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just returns the legend text stored inside the displayer if it is defined. Otherwise, the method returns the name of the data set obtained by the IlvAbstractChartDisplayer::getRealDataSet method. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method returns the text that will be used in a legend for the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

index

If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Returns:

The text that will be used in a legend as comments for the data represented by the current displayer.

Implemented in IlvSingleChartDisplayer, IlvCompositeChartDisplayer, and IlvHiLoChartDisplayer.

IlUInt IlvAbstractChartDisplayer::getMaxDataSetsCount

(

)

const

Returns the maximum number of real data sets that the current displayer is allowed to display.

Returns:

The maximum number of real data sets that the current displayer is allowed to display.

const char* IlvAbstractChartDisplayer::getName

(

)

const

Returns the name of the current displayer.

Returns:

The name of the current displayer.

virtual IlUInt IlvAbstractChartDisplayer::getNearestPoint	(	IlvChartDataSet *&	dataSet,
		const IlvPoint &	viewPoint,
		IlvDim	distance,
		IlvPoint &	point,
		const IlvTransformer *	t = 0
	)			const [pure virtual]

Returns the nearest data point.

Returns the index of the data point in the data set dataSet displayed by the current displayer that has its corresponding point in screen coordinates nearest to the point viewPoint. The returned index is equal to IlvBadIndex if no data point has been found. If the data set dataSet passed as a parameter is equal to 0, the nearest data point is searched for in all the data sets displayed by the current displayer. Otherwise, it is searched for in the data set dataSet. At the end, dataSet references the data set in which the data point has been found or 0 if no data set has been found. If no point has been found in a data set, dataSet is also equal to 0.

Parameters:

	dataSet	The data set from which a data point is retrieved.
	viewPoint	The point in screen coordinates for which we want to get the nearest displayed data point.
	distance	The maximum distance allowed between viewPoint and the screen point corresponding to the returned data point.
	point	The screen point corresponding to the nearest data point that has been found.
	t	The optional transformer.

Returns:

The index of the nearest data point that has been found.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

IlvCoordinateInfo* IlvAbstractChartDisplayer::getOrdinateInfo

(

)

const

Deprecated Returns the coordinate information associated with the ordinate scale considered to display data.

Returns:

A pointer to the coordinate information associated with the ordinate scale that is considered to display data.

virtual IlvPalette* IlvAbstractChartDisplayer::getPalette

(

IlUInt

index = 0

)

const [pure virtual]

Returns a palette used by the current displayer to display data.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just returns the palette stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method returns the palette used by the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

index

If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers composing the current displayer. Otherwise, this parameter can be omitted.

Returns:

A pointer to the palette.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

const IlvCompositeChartDisplayer* IlvAbstractChartDisplayer::getParentDisplayer

(

)

const

Returns the parent displayer.

This method is appropriate when the current displayer is used by a composite displayer.

Returns:

A pointer to the composite displayer that uses the current displayer if the current displayer is used by a composite displayer. Otherwise, it returns 0.

virtual IlvChartDataPointInfo* IlvAbstractChartDisplayer::getPointInfo	(	IlUInt	dataPtIdx,
		const IlvChartDataSet *	dataSet = 0
	)			const [virtual]

Returns the point information associated with a given data point.

Returns the point information associated with the data point at the index index in the data set dataSet if dataSet is different from 0. dataSet must be a real data set displayed by the current displayer. If dataSet is equal to 0, this method returns the point information associated with the data point at the index index in the data set returned by the IlvAbstractChartDisplayer::getRealDataSet method.

If a point information collection has been defined to be used by the current displayer to display the considered data set, this method returns the point information that is managed by this point information collection. If no such point information collection has been defined, this method returns the point information that is managed by the point information collection that has directly been set on the considered data set (by using the IlvChartDataSet::setPointInfoCollection method) if this point information collection exists.

Parameters:

	dataPtIdx	The index of the data point for which we want to get the point information.
	dataSet	The data set to which the data point belongs.

Returns:

A pointer to the point information associated with the considered data point.

Warning:

[note] The returned point information will be used by the current displayer to display the data point with which it is associated.

Reimplemented in IlvHiLoChartDisplayer.

virtual IlvPointInfoCollection* IlvAbstractChartDisplayer::getPointInfoCollection

(

const IlvChartDataSet *

dataSet

)

const [pure virtual]

Returns the point information collection defined to be used to display a given data set.

Parameters:

dataSet

The data set that will be displayed by the current displayer.

Returns:

A pointer to the point information collection defined to be used to display the data set dataSet.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual IlvPalette* IlvAbstractChartDisplayer::getProjectedPointsPalette

(

)

const [virtual]

Returns the palette used to display out-of-bounds values.

The current implementation of the method returns a pointer to the palette object that has been set to display out-of-bounds data points in the chart object that uses the current displayer.

Returns:

A pointer to the palette object used to display out-of-bounds data points.

Reimplemented in IlvPolylineChartDisplayer.

IlvChartDataSet* IlvAbstractChartDisplayer::getRealDataSet

(

IlUInt

index = 0

)

const

Returns a real data set to be displayed by the current displayer.

Parameters:

index

The index of the real data set that is returned.

Returns:

A pointer to the real data set that is returned.

IlUInt IlvAbstractChartDisplayer::getRealDataSetsCount

(

)

const

Returns the number of real data sets.

Returns:

The number of real data sets to be displayed by the current displayer.

virtual IlvCombinedChartDataSet* IlvAbstractChartDisplayer::getVirtualDataSet	(	const IlvChartDataSet *	dataSet,
		IlUInt &	index
	)			const [virtual]

Returns a virtual data set used by the current displayer.

The default implementation returns the first virtual data set among the virtual data sets used by the current displayer for which the data set dataSet is one of the real data sets used to construct this virtual data set.

Parameters:

	dataSet	The real data set for which we want to get the first virtual data set that uses it.
	index	The index of the virtual data set that is returned.

Returns:

The first virtual data set among the virtual data sets used by the current displayer for which the data set dataSet is one of the real data sets used to construct this virtual data set.

Reimplemented in IlvStackedChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::graphicalRepresentationByDataPoint

(

)

const [virtual]

Indicates whether there is a graphical representation by data point.

There is a graphical representation by data point for displayers displaying markers, bars, and so on. But there is not a graphical representation by data point for some displayers (such as polyline displayers, step displayers, and so on) that display continuous graphical representations linking several data points together.

This method returns IlTrue if there is a graphical representation by data point for the current displayer and IlFalse otherwise.

Returns:

IlTrue by default.

Reimplemented in IlvCompositeChartDisplayer, IlvPolylineChartDisplayer, and IlvStepChartDisplayer.

virtual void IlvAbstractChartDisplayer::insertDataSet	(	IlvChartDataSet *	dataSet,
		IlUInt	index = IlvLastPositionIndex
	)			[virtual]

Inserts a real data set to be displayed by the current displayer.

Parameters:

	dataSet	The data set to insert.
	index	The index at which the data set must be inserted.

virtual IlBoolean IlvAbstractChartDisplayer::isContinuous

(

)

const [virtual]

Indicates whether the graphical representation is continuous.

The graphical representation of data displayed by a displayer is continuous if the graphical representation displayed for a given data point extends to and relies on another data point. So it is continuous if a given data point is not sufficient to display the graphical representation for this data point. For example, the graphical representation of data by a polyline is continuous since it requires the given data point and the following data point to be able to draw the graphical representation for a given data point. On the other hand, the graphical representation of data by markers is not continuous.

This method returns IlTrue if the current displayer is continuous and IlFalse otherwise.

Returns:

IlFalse by default.

Reimplemented in IlvCompositeChartDisplayer, IlvHiLoChartDisplayer, IlvPieChartDisplayer, IlvPolylineChartDisplayer, and IlvStepChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::isFilled

(

)

const [virtual]

Indicates whether the graphical representation is filled.

A graphical representation is filled for a given data point if it is not only located around this data point but also if it extends towards the origin. This is the case, for example, for displayers representing data with bars. A bar begins at the data point position and is drawn to the abscissa scale in Cartesian charts and to the center of the data display area in polar charts.

This method returns IlTrue if the graphical representation displayed by the current displayer is filled and IlFalse otherwise.

Returns:

IlFalse by default.

Reimplemented in IlvBarChartDisplayer, IlvCompositeChartDisplayer, IlvHiLoChartDisplayer, IlvPolygonChartDisplayer, and IlvStairChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::isViewable

(

)

const [virtual]

Indicates whether the graphical representation can be viewed.

The graphical representation displayed by the current displayer can be viewed if and only if all the elements required to be able to display this graphical representation are verified. By default, it can be viewed if the graphical representation is visible, if the number of data sets to display is greater than 0, and if the coordinate information associated with the ordinate scale considered to display the data is defined.

Returns:

IlTrue if the graphical representation displayed by the current displayer can be viewed, IlFalse otherwise.

Reimplemented in IlvBubbleChartDisplayer, IlvCompositeChartDisplayer, and IlvHiLoChartDisplayer.

IlBoolean IlvAbstractChartDisplayer::isVisible

(

)

const

Indicates whether the graphical representation is visible.

Returns:

IlTrue if the graphical representation displayed by the current displayer is visible and IlFalse otherwise.

static IlvAbstractChartDisplayer* IlvAbstractChartDisplayer::Load

(

IlvInputFile &

file

)

[static]

Reads a displayer object from a file.

Creates a displayer instance from the description stored in the file file. The object description must have been written with the IlvAbstractChartDisplayer::save method.

Parameters:

file

The file where the object description is stored.

Returns:

A pointer to the created object.

virtual void IlvAbstractChartDisplayer::removeDataSet

(

IlvChartDataSet *

dataSet

)

[virtual]

Removes a real data set from the data sets to be displayed by the current displayer.

Parameters:

dataSet

The data set that is to be removed from the collection of data sets to be displayed by the current displayer.

Warning:

[note] To get the data set that will be removed, you must uses the getRealDataSet function if the displayer uses composite data sets like the IlvStackedChartDisplayer.

void IlvAbstractChartDisplayer::removePointInfoCollection

(

const IlvChartDataSet *

dataSet

)

Removes the point information collection defined to be used to display a given data set.

Parameters:

dataSet

The data set for which we want to remove the defined point information collection.

virtual IlBoolean IlvAbstractChartDisplayer::replaceDataSet	(	IlvChartDataSet *	oldDataSet,
		IlvChartDataSet *	newDataSet
	)			[virtual]

Replaces a real data set with another one.

Parameters:

	oldDataSet	The data set that is to be replaced in the collection of data sets to be displayed by the current displayer.
	newDataSet	The data set that will replace oldDataSet.

Returns:

IlTrue if the data set replacement has been successfully performed and IlFalse otherwise.

IlvOutputFile& IlvAbstractChartDisplayer::save

(

IlvOutputFile &

file

)

const

Writes a complete description of the current object in a file.

Writes the complete object description in a file. This description contains all the information necessary to read back this object with the IlvAbstractChartDisplayer::Load member function. This method first writes information regarding the type of the object and calls the IlvAbstractChartDisplayer::write method.

Parameters:

file

The file where the complete object description is written.

virtual void IlvAbstractChartDisplayer::setBackground	(	IlvColor *	color,
		IlUInt	index = 0
	)			[pure virtual]

Sets the background color of a palette used by the current displayer to display data.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just sets the background color of the palette stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method sets the background color of the palette used by the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

	color	The background color to be set.
	index	If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::setChartGraphic

(

IlvChartGraphic *

chart

)

[virtual]

Sets the chart graphic which uses the current displayer.

Parameters:

chart

The chart graphic which uses the current displayer.

Warning:

[note] This method is for internal use only and should not be used directly by the user. The chart graphic that uses the current displayer is automatically set when the displayer is added to this chart graphic. Therefore, the chart graphic does not need to be set by hand.

Reimplemented in IlvCompositeChartDisplayer, and IlvPieChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::setDataPoint	(	IlvChartDataSet *	dataSet,
		IlUInt	dataPtIdx,
		const IlvPoint &	point,
		const IlvTransformer *	t = 0
	)			const [pure virtual]

Sets the corresponding data point from a screen point.

Computes from the point in screen coordinates point the corresponding data point and sets this data point at the index dataPtIdx in the data set dataSet that is displayed by the current displayer.

Parameters:

	dataSet	The data set for which we want to set a data point.
	dataPtIdx	The index of the data point to be set.
	point	The point in screen coordinates that is considered to be already transformed by t.
	t	The transformer that has already been applied to point.

Returns:

IlTrue if the data point has been successfully set and IlFalse otherwise.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

void IlvAbstractChartDisplayer::setDataSet	(	IlvChartDataSet *	dataSet,
		IlvPalette *	palette,
		IlUInt	index = 0
	)

Sets a real data set to be displayed by the current displayer.

If a data set already exists at the index index, it is replaced by the new one. Otherwise, the new data set is added at the end.

Parameters:

	dataSet	The new real data set to be displayed by the current displayer.
	palette	A pointer to the palette that will be used to display the data set dataSet.
	index	The index at which the new data set is set.

virtual void IlvAbstractChartDisplayer::setDataSet	(	IlvChartDataSet *	dataSet,
		IlUInt	index = 0
	)			[virtual]

Sets a real data set to be displayed by the current displayer.

If a data set already exists at the index index, it is replaced by the new one. Otherwise, the new data set is added at the end.

Parameters:

	dataSet	The new real data set to be displayed by the current displayer.
	index	The index at which the new data set is set.

virtual void IlvAbstractChartDisplayer::setDataSets	(	IlUInt	count,
		IlvChartDataSet *const *	dataSets
	)			[virtual]

Sets the real data sets to be displayed by the current displayer.

Parameters:

	count	The number of data sets contained in the array dataSets.
	dataSets	The new array of real data sets to be displayed by the current displayer.

virtual void IlvAbstractChartDisplayer::setForeground	(	IlvColor *	color,
		IlUInt	index = 0
	)			[pure virtual]

Sets the foreground color of a palette used by the current displayer to display data.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just sets the foreground color of the palette stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method sets the foreground color of the palette used by the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

	color	The foreground color to be set.
	index	If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::setLegendItems

(

IlvChartLegend *

legend

)

const [pure virtual]

Sets the legend items associated with the current displayer.

Sets the legend items associated with the current displayer on the legend legend. This is done by calling the IlvChartLegend::addLegendItem method for each legend item associated with the current displayer.

Parameters:

legend

The legend that will display the legend items associated with the current displayer.

Implemented in IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvPieChartDisplayer, and IlvMarkedPolylineChartDisplayer.

virtual void IlvAbstractChartDisplayer::setLegendText	(	const char *	text,
		IlUInt	index = 0
	)			[pure virtual]

Sets the text that will be used in a legend for the current displayer.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just sets the legend text stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method sets the legend text defined for the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

	text	The text that will be used in a legend for the current displayer. The text passed as a parameter is copied.
	index	If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers that compose the current displayer. Otherwise, this parameter can be omitted.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::setMode

(

IlvDrawMode

mode

)

[pure virtual]

Sets the drawing mode.

Sets the drawing mode for the current object. The information is passed to all the palettes used by the current displayer to display data.

Parameters:

mode

The new drawing mode for the current object.

Implemented in Ilv3dBarChartDisplayer, IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvHiLoChartDisplayer, and IlvPieChartDisplayer.

void IlvAbstractChartDisplayer::setName

(

const char *

name

)

Sets the name of the current displayer.

Parameters:

name

The new name of the current displayer. The name passed as a parameter is copied.

virtual void IlvAbstractChartDisplayer::setOrdinateInfo

(

IlvCoordinateInfo *

ordinateInfo

)

[virtual]

Sets the coordinate information associated with the ordinate scale considered to display data.

This method allows you to specify the ordinate scale that will be considered to display data for the current displayer. The coordinate information associated with this ordinate scale is set in the current displayer. In the case of a composite displayer, the coordinate information is propagated to all the child displayers.

Parameters:

ordinateInfo

The new coordinate information associated with the ordinate scale that will be considered to display the data for the current displayer.

Warning:

[note] This method is for internal use only and should not be directly used by the user. The coordinate information associated with the ordinate scale that will be considered to display data for the current displayer is automatically set when the displayer is added to a chart graphic. (See the IlvChartGraphic::addDisplayer method.) Therefore, the coordinate information does not need to be set by hand.

Reimplemented in IlvCompositeChartDisplayer.

virtual void IlvAbstractChartDisplayer::setOverwrite

(

IlBoolean

o

)

[pure virtual]

Sets the overwrite mode.

Modifies the way the drawing member functions of the current object operate when drawing on the root port. If the o parameter is set to IlFalse, the drawing operations are hidden by the windows stored on the top window. If the parameter is set to IlTrue, the drawing operations are performed on top of every window present on the screen, just as if the windows were part of the root window. The information is passed to all the palettes used by the current displayer to display data.

Parameters:

o

The new value of the Boolean indicating the way the drawing member functions operate.

Implemented in Ilv3dBarChartDisplayer, IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvHiLoChartDisplayer, and IlvPieChartDisplayer.

virtual void IlvAbstractChartDisplayer::setPalette	(	IlvPalette *	pal,
		IlUInt	index = 0
	)			[pure virtual]

Sets a palette used by the current displayer to display data.

If the current displayer is a single displayer (that is, an object inherited from the IlvSingleChartDisplayer class), this method just sets the palette stored inside the displayer. If the current displayer is a composite displayer (that is, an object inherited from the IlvCompositeChartDisplayer class), this method sets the palette used by the displayer at the index index in the collection of displayers that compose the current displayer.

Parameters:

	pal	The palette to be set.
	index	If the current displayer is a composite displayer, this parameter indicates the index of the displayer within the displayers composing the current displayer. Otherwise, this parameter can be omitted.

Implemented in Ilv3dBarChartDisplayer, IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

void IlvAbstractChartDisplayer::setParentDisplayer

(

const IlvCompositeChartDisplayer *

displayer

)

Sets the parent displayer.

This method is appropriate when the current displayer is used by a composite displayer.

Parameters:

displayer

The pointer to the composite displayer that uses the current displayer.

Warning:

[note] This method is used internally and should not be used directly by the user.

virtual void IlvAbstractChartDisplayer::setPointInfoCollection	(	const IlvChartDataSet *	dataSet,
		IlvPointInfoCollection *	ptInfoCollection
	)			[pure virtual]

Sets the point information collection that will be used to display a given data set.

This new point information collection has priority. It is the one that will be considered to display the data set dataSet, even if a point information collection has already been defined for the data set dataSet by using the IlvChartDataSet::setPointInfoCollection method.

Parameters:

	dataSet	The data set that will be displayed by the current displayer.
	ptInfoCollection	The point information collection that will be used to display the data set dataSet.

Implemented in IlvSingleChartDisplayer, and IlvCompositeChartDisplayer.

void IlvAbstractChartDisplayer::setVirtualDataSet	(	IlvCombinedChartDataSet *	vDataSet,
		IlUInt	index = 0
	)

Sets a virtual data set used by the current displayer.

If a data set already exists at the index index, it is replaced by the new one. Otherwise, the new data set is added at the end.

Parameters:

	dataSet	The new virtual data set.
	index	The index at which the new data set is set.

Warning:

[note] This method is used internally and should not be used directly by the user since the creation and the handling of the virtual data sets for a given displayer are performed internally within the class.

void IlvAbstractChartDisplayer::setVisible

(

IlBoolean

visible

)

Specifies whether the graphical representation is visible.

Parameters:

visible

The new value of the Boolean indicating whether the graphical representation displayed by the current displayer is visible.

virtual void IlvAbstractChartDisplayer::updateVirtualDataSets

(

)

[protected, virtual]

Updates the virtual data sets.

This method does nothing at this level of the class hierarchy.

Warning:

[note] This method is used internally and should not be used directly by the user. It is called in the IlvAbstractChartDisplayer::update method to update the virtual data sets when the real data sets have been modified.

Reimplemented in IlvHiLoChartDisplayer, IlvPieChartDisplayer, and IlvStackedChartDisplayer.

virtual IlBoolean IlvAbstractChartDisplayer::useVirtualDataSets

(

)

const [virtual]

Indicates whether the current displayer uses virtual data sets.

Returns:

IlTrue if the current displayer uses virtual data sets and IlFalse otherwise.

Reimplemented in IlvHiLoChartDisplayer, IlvHiLoOpenCloseChartDisplayer, IlvPieChartDisplayer, and IlvStackedChartDisplayer.

virtual void IlvAbstractChartDisplayer::write

(

IlvOutputFile &

file

)

const [virtual]

Writes the attributes of the current object in a file.

Called by the IlvAbstractChartDisplayer::save method. This method can be overloaded in subclasses that define new attributes. The information written by the write method is read by the IO constructor, which takes an IlvInputFile as its only argument. Both this method and the IO constructor can be automatically declared by using the DeclareChartDisplayerTypeInfo macro within the class declaration.

Parameters:

file

The file where the attributes of the current object are written.

Reimplemented in IlvSingleChartDisplayer, IlvCompositeChartDisplayer, IlvPieChartDisplayer, IlvPolylineChartDisplayer, IlvFixedStepChartDisplayer, IlvScatterChartDisplayer, IlvMarkedPolylineChartDisplayer, and IlvStackedChartDisplayer.