Class for bubble displayers. More...

#include <ilviews/charts/bubble.h>

Inheritance diagram for IlvBubbleChartDisplayer:

Public Types
enum	BubbleSizeMode { MinMax, Scaling }
	This enumeration type defines how the size of the bubbles is computed. More...

Public Member Functions
	IlvBubbleChartDisplayer (IlvGraphic graphic, IlvDim maxSize=40, IlvDim minSize=0, IlvPalette palette=0)
	Constructor. More...

	IlvBubbleChartDisplayer (IlvGraphic graphic, IlDouble scaling, IlvPalette palette=0)
	Constructor. More...

virtual	~IlvBubbleChartDisplayer ()
	Destructor. More...

virtual void	drawLegendItem (IlvPort dst, const IlvRect &legendArea, IlvPalette itemPal, const IlvRegion *clip, IlAny clientData=0) const
	Draws the graphic part of a legend item associated with the current displayer. More...

virtual void	drawPoints (IlvChartDisplayerPoints displayerPoints, IlvPort dst, const IlvTransformer t=0, const IlvRegion clip=0) const
	Draws the graphical representation from points in screen coordinates corresponding to the data points to display. More...

virtual void	getClipArea (IlvRect &area, const IlvTransformer *t) const
	Returns the clipping region that is used for the drawing. More...

IlvGraphic *	getGraphicModel () const
	Returns the graphic object that is used as bubbles. More...

IlvDim	getGraphicSize (IlUInt pointIndex) const
	Returns the size of the graphic object that will be displayed as bubble for the data point at a given index. More...

IlvDim	getMaxSize () const
	Returns the maximum size that the bubbles will have on the screen. More...

IlvDim	getMinSize () const
	Returns the minimum size that the bubbles will have on the screen. More...

IlDouble	getScaling () const
	Retrieves the scaling factor used to compute the bubble size. More...

virtual IlvDim	getSizeAlongBase () const
	Returns the size along the base for the graphical representation of a given data point. More...

IlvChartDataSet *	getSizeDataSet () const
	Returns the data set that indicates the size of the bubbles. More...

virtual IlBoolean	isViewable () const
	Indicates whether the graphical representation can be viewed. More...

IlvGraphic *	setGraphicModel (IlvGraphic *graphic)
	Sets the graphic object that is used as bubbles. More...

void	setMaxSize (IlvDim maxSize)
	Sets the maximum size that the bubbles will have on the screen. More...

void	setMinSize (IlvDim minSize)
	Sets the minimum size that the bubbles will have on the screen. More...

void	setScaling (IlDouble scaling)
	Sets the scaling factor used to compute the bubble size. More...

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

virtual IlvChartDisplayerPoints *	allocDisplayerPoints () const
	Allocates and returns an `IlvChartDisplayerPoints` object. More...

virtual IlBoolean	boundingBox (IlvRect &bbox, const IlvTransformer *t=0) const
	Returns the bounding box of the graphical representation of data. More...

virtual IlBoolean	dataPointBBox (IlUInt dataPtIdx, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const
	Returns the bounding box of the graphical representation of the data points at a given index. More...

virtual void	draw (IlvPort dst, const IlvTransformer t=0, const IlvRegion *clip=0) const
	Draws the graphical representation of data. More...

virtual void	drawDataPoint (IlUInt dataPtIdx, IlvPort dst, const IlvTransformer t=0, const IlvRegion *clip=0) const
	Draws the graphical representation of the data point(s) at a given index. More...

virtual void	drawDataPoints (IlUInt iMin, IlUInt iMax, IlvPort dst, const IlvTransformer t=0, const IlvRegion *clip=0) const
	Draws the graphical representation of the data points between a given interval. More...

virtual void	drawFill (IlBoolean b)
	Sets the filling mode of the displayer. More...

virtual IlvColor *	getBackground (IlUInt index=0) const
	Returns the background color of a palette used by the current displayer to display data. More...

void	getDataDisplayArea (IlvRect &dataDisplayArea, const IlvTransformer *t=0) const
	Returns the bounds of the data display area. More...

IlvChartDisplayerPointsFactory *	getDisplayerPointsFactory () const
	Returns the factory used to create `IlvChartDisplayerPoints` instances. More...

virtual IlUInt	getDisplayersCount () const
	Returns the number of displayers. More...

virtual IlUInt	getDisplayItem (IlvChartDataSet &dataSet, const IlvPoint &viewPoint, const IlvTransformer t) const
	Returns the item to which a view point corresponds. More...

virtual IlBoolean	getDisplayPoint (const IlvChartDataSet dataSet, IlUInt dataPtIdx, IlvPoint &point, const IlvTransformer t=0) const
	Returns the corresponding screen point for a data point. More...

virtual IlvColor *	getForeground (IlUInt index=0) const
	Returns the foreground color of a palette used by the current displayer to display data. More...

virtual const char *	getInternalLegendText (IlUInt index=0) const
	Returns the legend text stored in the current displayer. More...

virtual const char *	getLegendText (IlUInt index=0) const
	Returns the text that will be used in a legend for the current displayer. More...

virtual IlUInt	getNearestPoint (IlvChartDataSet &dataSet, const IlvPoint &viewPoint, IlvDim distance, IlvPoint &point, const IlvTransformer t=0) const
	Returns the nearest data point. More...

virtual IlvPalette *	getPalette (IlUInt=0) const
	Returns a palette used by the current displayer to display data. More...

virtual IlvPointInfoCollection *	getPointInfoCollection (const IlvChartDataSet *dataSet) const
	Returns the point information collection defined to be used to display a given data set. More...

IlvPos	getShiftOffset () const
	Returns the offset by which the graphical representation of data is shifted along the base of the chart. More...

IlBoolean	isDrawingFill () const
	Returns the filling mode for the current displayer. More...

virtual void	releaseDisplayerPoints (IlvChartDisplayerPoints *dispPts) const
	Releases an `IlvChartDisplayerPoints` object used by the current displayer. More...

virtual void	setBackground (IlvColor *color, IlUInt index=0)
	Sets the background color of a palette used by the current displayer to display data. More...

virtual IlBoolean	setDataPoint (IlvChartDataSet dataSet, IlUInt dataPtIdx, const IlvPoint &point, const IlvTransformer t=0) const
	Sets the corresponding data point from a screen point. More...

IlvChartDisplayerPointsFactory *	setDisplayerPointsFactory (IlvChartDisplayerPointsFactory *factory)
	Sets the factory used to create `IlvChartDisplayerPoints` instances. More...

virtual void	setForeground (IlvColor *color, IlUInt index=0)
	Sets the foreground color of a palette used by the current displayer to display data. More...

virtual void	setLegendItems (IlvChartLegend *legend) const
	Sets the legend items associated with the current displayer. More...

virtual void	setLegendText (const char *text, IlUInt index=0)
	Sets the text that will be used in a legend for the current displayer. More...

virtual void	setMode (IlvDrawMode mode)
	Sets the drawing mode. More...

virtual void	setOverwrite (IlBoolean o)
	Sets the overwrite mode. More...

virtual void	setPalette (IlvPalette *pal, IlUInt index=0)
	Sets a palette used by the current displayer to display data. More...

virtual void	setPointInfoCollection (const IlvChartDataSet dataSet, IlvPointInfoCollection ptInfoCollection)
	Sets the point information collection that will be used to display a given data set. More...

void	setShiftOffset (IlvPos offset)
	Sets the offset by which the graphical representation of data is shifted along the base of the chart. More...

virtual void	treatPointsOutOfAbscissaLimits (const IlvRect &dataDisplayArea, IlvChartDisplayerPoints *displayerPoints, const IlvCoordInterval &abscissaRange, const IlvPoint &minLimit, const IlvPoint &maxLimit) const
	Treats the occurrence of points in screen coordinates that are outside the abscissa limits. More...

virtual IlBoolean	usePointInfo () const
	Indicates whether point information collections are defined. More...

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

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

void	addDataSet (IlvChartDataSet *dataSet)
	Adds a real data set to be displayed by the current displayer. More...

virtual IlBoolean	canBeProjectedIfOutOfBounds () const
	Indicates whether the graphical representation can be projected when it is out-of-bounds. More...

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

IlBoolean	dataPointToDisplay (const IlvDoublePoint &dataPoint, IlvPoint &point, const IlvTransformer *t=0) const
	Projects a data point into screen coordinates. More...

virtual IlBoolean	displayDataSet (const IlvChartDataSet *dataSet) const
	Indicates whether the current displayer displays a data set. More...

IlBoolean	displayToDataPoint (const IlvPoint &point, IlvDoublePoint &dataPoint, const IlvTransformer *t=0) const
	Inversely projects a screen point to retrieve the corresponding data point. More...

IlvChartGraphic *	getChartGraphic () const
	Returns the chart graphic which uses the current displayer. More...

IlvChartDataSet *	getDataSet (IlUInt index=0) const
	Returns a data set used by the current displayer. More...

IlUInt	getDataSetsCount () const
	Returns the number of data sets used by the current displayer. More...

IlUInt	getMaxDataSetsCount () const
	Returns the maximum number of real data sets that the current displayer is allowed to display. More...

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

IlvCoordinateInfo *	getOrdinateInfo () const
	Deprecated Returns the coordinate information associated with the ordinate scale considered to display data. More...

const IlvCompositeChartDisplayer *	getParentDisplayer () const
	Returns the parent displayer. More...

virtual IlvChartDataPointInfo *	getPointInfo (IlUInt dataPtIdx, const IlvChartDataSet *dataSet=0) const
	Returns the point information associated with a given data point. More...

virtual IlvPalette *	getProjectedPointsPalette () const
	Returns the palette used to display out-of-bounds values. More...

IlvChartDataSet *	getRealDataSet (IlUInt index=0) const
	Returns a real data set to be displayed by the current displayer. More...

IlUInt	getRealDataSetsCount () const
	Returns the number of real data sets. More...

virtual IlvCombinedChartDataSet *	getVirtualDataSet (const IlvChartDataSet *dataSet, IlUInt &index) const
	Returns a virtual data set used by the current displayer. More...

virtual IlBoolean	graphicalRepresentationByDataPoint () const
	Indicates whether there is a graphical representation by data point. More...

virtual void	insertDataSet (IlvChartDataSet *dataSet, IlUInt index=IlvLastPositionIndex)
	Inserts a real data set to be displayed by the current displayer. More...

virtual IlBoolean	isContinuous () const
	Indicates whether the graphical representation is continuous. More...

virtual IlBoolean	isFilled () const
	Indicates whether the graphical representation is filled. More...

IlBoolean	isVisible () const
	Indicates whether the graphical representation is visible. More...

virtual void	removeDataSet (IlvChartDataSet *dataSet)
	Removes a real data set from the data sets to be displayed by the current displayer. More...

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. More...

virtual IlBoolean	replaceDataSet (IlvChartDataSet oldDataSet, IlvChartDataSet newDataSet)
	Replaces a real data set with another one. More...

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

virtual void	setChartGraphic (IlvChartGraphic *chart)
	Sets the chart graphic which uses the current displayer. More...

virtual void	setDataSet (IlvChartDataSet *dataSet, IlUInt index=0)
	Sets a real data set to be displayed by the current displayer. More...

void	setDataSet (IlvChartDataSet dataSet, IlvPalette palette, IlUInt index=0)
	Sets a real data set to be displayed by the current displayer. More...

virtual void	setDataSets (IlUInt count, IlvChartDataSet const dataSets)
	Sets the real data sets to be displayed by the current displayer. More...

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

virtual void	setOrdinateInfo (IlvCoordinateInfo *ordinateInfo)
	Sets the coordinate information associated with the ordinate scale considered to display data. More...

void	setParentDisplayer (const IlvCompositeChartDisplayer *displayer)
	Sets the parent displayer. More...

void	setVirtualDataSet (IlvCombinedChartDataSet *vDataSet, IlUInt index=0)
	Sets a virtual data set used by the current displayer. More...

void	setVisible (IlBoolean visible)
	Specifies whether the graphical representation is visible. More...

virtual IlBoolean	useVirtualDataSets () const
	Indicates whether the current displayer uses virtual data sets. More...

Protected Member Functions
virtual void	boundingBoxOfItem (const IlvChartDisplayerPoints displayerPoints, IlUInt pointIndex, IlUInt pointCount, IlvPoint points, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const
	Computes the bounding box of the item drawn for a given point in screen coordinates corresponding to a data point to display. More...

virtual void	boundingBoxOfPoints (IlvChartDisplayerPoints displayerPoints, IlvRect &bbox, IlBoolean takeInfoIntoAccount, const IlvTransformer t=0) const
	Computes the bounding box of the graphical representation from points in screen coordinates corresponding to the data points to display. More...

virtual void	computeItem (const IlvChartDisplayerPoints displayerPoints, IlUInt pointIndex, IlUInt &usedPointsCount, IlvPoint points, const IlvTransformer *t=0) const
	Computes the item that will be displayed for a given point in screen coordinates corresponding to a data point to display. More...

virtual void	drawItem (const IlvChartDisplayerPoints displayerPoints, IlUInt pointIndex, IlUInt pointCount, IlvPoint points, IlvPalette itemPalette, IlvPort dst, const IlvTransformer t=0, const IlvRegion clip=0) const
	Draws the item for a given point in screen coordinates corresponding to a data point to display. More...

virtual IlUInt	getItemPointsCount (const IlvChartDisplayerPoints *displayerPoints) const
	Returns the maximum number of points needed to define an item for the current displayer. More...

virtual void	update ()
	Performs the updates needed when modifications are made to the real data sets. More...

Protected Member Functions inherited from IlvSingleChartDisplayer
	IlvSingleChartDisplayer (IlvPalette *palette=0)
	Constructor. More...

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

	IlvSingleChartDisplayer (const IlvSingleChartDisplayer &displayer)
	Constructor. More...

IlBoolean	boundingBoxOfPart (const IlvCoordInterval &abscissaRange, IlBoolean shiftOfCycleLength, IlvRect &partBBox, IlBoolean takeInfoIntoAccount, const IlvTransformer *t=0) const
	Returns the bounding box of a part of the graphical representation of data. More...

virtual IlBoolean	computeLimitsForDataSelection (const IlvRect &clipRect, const IlvCoordInterval &abscissaRange, const IlvCoordInterval &ordinateRange, IlvCoordInterval &abscissaSelectionRange, IlvCoordInterval &ordinateSelectionRange, IlBoolean &dataToSelect, const IlvTransformer *t=0) const
	Computes the abscissa and ordinate intervals used to select the data to be displayed in a given rectangle. More...

void	drawPart (const IlvCoordInterval &abscissaRange, IlBoolean shiftOfCycleLength, IlvPort dst, const IlvTransformer t=0, const IlvRegion *clip=0) const
	Draws a part of the graphical representation of data. More...

virtual void	drawPointInfos (const IlvChartDisplayerPoints displayerPoints, IlvPort dst, const IlvTransformer t=0, const IlvRegion clip=0, const IlvChartDataSet *dataSet=0) const
	Draws the point information defined for the data points to be displayed. More...

IlUInt	getNearestPointInsidePart (const IlvCoordInterval &abscissaRange, IlBoolean shiftOfCycleLength, IlvChartDataSet &dataSet, const IlvPoint &viewPoint, IlvDim distance, IlvPoint &point, const IlvTransformer t=0) const
	Returns the nearest data point within a given abscissa range. More...

virtual IlUInt	pointsContains (const IlvPoint &viewPoint, IlvChartDisplayerPoints , const IlvTransformer t=0) const
	Returns the index of the data point of which the corresponding displayer item holds viewPoint.

virtual IlvDoublePoint *	selectDataPointsForPoint (IlUInt dataPtIdx, IlUInt &count, IlUInt *&dataPtIdxes) const
	Selects and returns the data points needed to be able to display the graphical representation of the data point(s) at a given index in the real data set(s) to be displayed by the current displayer. More...

virtual IlvDoublePoint *	selectDataPointsForRange (const IlvCoordInterval &abscissaRange, IlUInt &pointCount, IlUInt &dataPtIdxes, const IlvTransformer t=0, const IlvRect *clip=0) const
	Selects And returns the data points to display that are within a given abscissa interval. More...

virtual IlvDoublePoint *	selectDataPointsInRect (IlUInt &pointCount, IlUInt &dataPtIndexes, IlvRect pickRect, const IlvTransformer t=0) const
	Selects the data points that are rendered within a rectangle. More...

Protected Member Functions inherited from IlvAbstractChartDisplayer
	IlvAbstractChartDisplayer ()
	Constructor. More...

	IlvAbstractChartDisplayer (const IlvAbstractChartDisplayer &displayer)
	Constructor. More...

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

virtual void	dataSetAdded (IlUInt position=IlvLastPositionIndex)
	Performs the updates needed when a real data set is added. More...

virtual void	dataSetRemoved (IlUInt index)
	Performs the updates needed when a real data set is removed. More...

virtual void	updateVirtualDataSets ()
	Updates the virtual data sets. More...

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

Detailed Description

Class for bubble displayers.

Library: ilvcharts

This class is a subclass of IlvSingleChartDisplayer which allows you to represent data with bubbles.

The bubble displayer displays two data sets. The first data set indicates the location of the bubbles and the second data set indicates the size of the bubbles.

Note: The two data sets must have the same number of data items.

Any graphic object can be used as bubbles.

This displayer can be used with any type of projection. (See the IlvAbstractProjector class for more details.)

The following images show data sets represented with a bubble displayer in a Cartesian chart (on the left) and a polar chart (on the right).

See Also: IlvSingleChartDisplayer.

Member Enumeration Documentation

enum IlvBubbleChartDisplayer::BubbleSizeMode

This enumeration type defines how the size of the bubbles is computed.

Enumerator
MinMax	The size of the bubbles is computed by specifying a maximum and a minimum size.
Scaling	The size of the bubbles is computed by applying a scaling factor to the data values.

Constructor & Destructor Documentation

IlvBubbleChartDisplayer::IlvBubbleChartDisplayer	(	IlvGraphic *	graphic,
		IlvDim	maxSize = `40`,
		IlvDim	minSize = `0`,
		IlvPalette *	palette = `0`
	)

Constructor.

Initializes a new IlvBubbleChartDisplayer object.

Parameters

graphic	The graphic object that will be used to display the bubbles.
maxSize	The maximum size that the bubbles will have on the screen.
minSize	The minimum size that the bubbles will have on the screen.
palette	The palette that will be used to display the bubbles.

IlvBubbleChartDisplayer::IlvBubbleChartDisplayer	(	IlvGraphic *	graphic,
		IlDouble	scaling,
		IlvPalette *	palette = `0`
	)

Constructor.

Initializes a new IlvBubbleChartDisplayer object.

Parameters

graphic	The graphic object that will be used to display the bubbles.
scaling	The scaling factor that is applied to the data values to compute the size of the bubbles.
palette	The palette that will be used to display the bubbles.

virtual IlvBubbleChartDisplayer::~IlvBubbleChartDisplayer ( )

virtual

Destructor.

The destructor deletes the graphic object that is used to display the bubbles.

Member Function Documentation

virtual void IlvBubbleChartDisplayer::boundingBoxOfItem	(	const IlvChartDisplayerPoints *	displayerPoints,
		IlUInt	pointIndex,
		IlUInt	pointCount,
		IlvPoint *	points,
		IlvRect &	bbox,
		IlBoolean	takeInfoIntoAccount = `IlTrue`,
		const IlvTransformer *	t = `0`
	)		const

protectedvirtual

Computes the bounding box of the item drawn for a given point in screen coordinates corresponding to a data point to display.

Computes the bounding box of the item drawn for the point in screen coordinates that is stored at the index pointIndex in the displayerPoints object. (See the IlvSingleChartDisplayer::boundingBoxOfItem method for more details.)

This method returns the bounding box of the bubble centered on the screen point stored in points.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvBubbleChartDisplayer::boundingBoxOfPoints	(	IlvChartDisplayerPoints *	displayerPoints,
		IlvRect &	bbox,
		IlBoolean	takeInfoIntoAccount,
		const IlvTransformer *	t = `0`
	)		const

protectedvirtual

Computes the bounding box of the graphical representation from points in screen coordinates corresponding to the data points to display.

(See the IlvSingleChartDisplayer::boundingBoxOfPoints() method for more details).

This method calls the IlvSingleChartDisplayer::boundingBoxOfPoints() method. Then, the computed bounding box is expanded of the maximum size of the displayed bubbles divided by 2.

Note: The computed bounding box is slightly larger than the real bounding box to avoid expensive computations on IlvRect objects.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvBubbleChartDisplayer::computeItem	(	const IlvChartDisplayerPoints *	displayerPoints,
		IlUInt	pointIndex,
		IlUInt &	usedPointsCount,
		IlvPoint *	points,
		const IlvTransformer *	t = `0`
	)		const

protectedvirtual

Computes the item that will be displayed for a given point in screen coordinates corresponding to a data point to display.

Computes the points defining the item that will be displayed for the point in screen coordinates that is stored at the index pointIndex in the displayerPoints object. This object stores the points in screen coordinates corresponding to the data points that have to be displayed by the current displayer. (See the IlvSingleChartDisplayer::computeItem method for more details.)

This method just returns in points the point at the index pointIndex since the item that will be displayed for a given screen point corresponding to a data point to display is a bubble centered on this screen point.

The number of computed points defining the item (that is, 1) is returned in usedPointsCount.

Implements IlvSingleChartDisplayer.

virtual void IlvBubbleChartDisplayer::drawItem	(	const IlvChartDisplayerPoints *	displayerPoints,
		IlUInt	pointIndex,
		IlUInt	pointCount,
		IlvPoint *	points,
		IlvPalette *	itemPalette,
		IlvPort *	dst,
		const IlvTransformer *	t = `0`,
		const IlvRegion *	clip = `0`
	)		const

protectedvirtual

Draws the item for a given point in screen coordinates corresponding to a data point to display.

Draws the item for the point in screen coordinates that is stored at the index pointIndex in the displayerPoints object. This object stores the points in screen coordinates corresponding to the data points that have to be displayed by the current displayer. (See the IlvSingleChartDisplayer::drawItem method for more details.)

This method draws the graphic object defined to be used as bubbles centered on the screen point stored in points. The size of the graphic object is given by the IlvBubbleChartDisplayer::getGraphicSize method. The graphic object is drawn with the palette itemPalette.

Implements IlvSingleChartDisplayer.

virtual void IlvBubbleChartDisplayer::drawLegendItem	(	IlvPort *	dst,
		const IlvRect &	legendArea,
		IlvPalette *	itemPal,
		const IlvRegion *	clip,
		IlAny	clientData = `0`
	)		const

virtual

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

The current implementation of this method draws the graphic object used to display the bubbles.

Parameters

dst	The port used for the drawing.
legendArea	The area where the graphic object is drawn.
itemPal	The legend item palette associated with the current displayer.
clip	The clipping region.
clientData	The client data for the legend item associated with the current displayer.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvBubbleChartDisplayer::drawPoints	(	IlvChartDisplayerPoints *	displayerPoints,
		IlvPort *	dst,
		const IlvTransformer *	t = `0`,
		const IlvRegion *	clip = `0`
	)		const

virtual

Draws the graphical representation from points in screen coordinates corresponding to the data points to display.

The drawing is performed in the given port dst using the transformer t and the clipping region clip.

The default implementation of this method uses the IlvSingleChartDisplayer::getClipArea() method to obtain the clipping region to be used for the drawing. Then, for each point in screen coordinates stored in displayerPoints, it uses:

the IlvSingleChartDisplayer::computeItem() method to compute the item that will be displayed for this screen point.
the IlvSingleChartDisplayer::drawItem() method to draw the item for this screen point.

At the end, it uses the IlvSingleChartDisplayer::drawPointInfos() method to draw the point information (if any).

Parameters

displayerPoints	The object that stores the points in screen coordinates that have to be displayed by the current displayer. These points are considered to be already transformed by t.
dst	The port used for the drawing.
t	The optional transformer.
clip	The optional clipping region.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvBubbleChartDisplayer::getClipArea	(	IlvRect &	area,
		const IlvTransformer *	t
	)		const

virtual

Returns the clipping region that is used for the drawing.

Returns in area the area obtained by the IlvSingleChartDisplayer::getClipArea method expanded by the maximum size that the bubbles will have on the screen.

Parameters

area	The returned clipping region.
t	The transformer applied to the returned clipping region.

Reimplemented from IlvSingleChartDisplayer.

IlvGraphic* IlvBubbleChartDisplayer::getGraphicModel ( ) const

Returns the graphic object that is used as bubbles.

Returns: A pointer to the graphic object that is used to display the bubbles if such an object is defined or 0 otherwise.

IlvDim IlvBubbleChartDisplayer::getGraphicSize ( IlUInt pointIndex ) const

Returns the size of the graphic object that will be displayed as bubble for the data point at a given index.

Parameters

pointIndex The index of the data point for which we want to get the size of the drawn bubble.

Returns: The size of the graphic object that will be displayed as a bubble for the data point at the index pointIndex.

virtual IlUInt IlvBubbleChartDisplayer::getItemPointsCount ( const IlvChartDisplayerPoints * displayerPoints ) const

protectedvirtual

Returns the maximum number of points needed to define an item for the current displayer.

(See the IlvBubbleChartDisplayer::computeItem method for more details).

Parameters

displayerPoints The object that stores the points in screen coordinates to be displayed by the current displayer.

Returns: 1.

Reimplemented from IlvSingleChartDisplayer.

IlvDim IlvBubbleChartDisplayer::getMaxSize ( ) const

Returns the maximum size that the bubbles will have on the screen.

Returns: The maximum size that the bubbles will have on the screen.

IlvDim IlvBubbleChartDisplayer::getMinSize ( ) const

Returns the minimum size that the bubbles will have on the screen.

Returns: The minimum size that the bubbles will have on the screen.

IlDouble IlvBubbleChartDisplayer::getScaling ( ) const

Retrieves the scaling factor used to compute the bubble size.

Returns: The scaling factor that is applied to the data values to compute the size of the bubbles.

virtual IlvDim IlvBubbleChartDisplayer::getSizeAlongBase ( ) const

virtual

Returns the size along the base for the graphical representation of a given data point.

See the IlvSingleChartDisplayer::getSizeAlongBase method for more details.

Returns: The maximum size that the bubbles will have on the screen.

Reimplemented from IlvSingleChartDisplayer.

IlvChartDataSet* IlvBubbleChartDisplayer::getSizeDataSet ( ) const

Returns the data set that indicates the size of the bubbles.

Returns: A pointer to the data set that indicates the size of the bubbles.

virtual IlBoolean IlvBubbleChartDisplayer::isViewable ( ) const

virtual

Indicates whether the graphical representation can be viewed.

Returns a Boolean indicating whether the graphical representation displayed by the current displayer is viewable. The graphical representation displayed by the current displayer is viewable if and only if all the elements required to be able to display this graphical representation are verified. It is viewable if the method IlvSingleChartDisplayer::isViewable returns IlTrue, if a graphic object to be used as bubbles is defined and if the number of data sets to display is equal to 2.

Returns: IlTrue if the graphical representation displayed by the current displayer is viewable and IlFalse otherwise.

Reimplemented from IlvAbstractChartDisplayer.

IlvGraphic* IlvBubbleChartDisplayer::setGraphicModel ( IlvGraphic * graphic )

Sets the graphic object that is used as bubbles.

Parameters

graphic The new graphic object that is used as bubbles.

void IlvBubbleChartDisplayer::setMaxSize ( IlvDim maxSize )

Sets the maximum size that the bubbles will have on the screen.

Parameters

maxSize The new maximum size that the bubbles will have on the screen.

void IlvBubbleChartDisplayer::setMinSize ( IlvDim minSize )

Sets the minimum size that the bubbles will have on the screen.

Parameters

minSize The new minimum size that the bubbles will have on the screen.

void IlvBubbleChartDisplayer::setScaling ( IlDouble scaling )

Sets the scaling factor used to compute the bubble size.

Parameters

scaling The new scaling factor that is applied to the data values to compute the size of the bubbles.

virtual void IlvBubbleChartDisplayer::update ( )

protectedvirtual

Performs the updates needed when modifications are made to the real data sets.

Performs the updates needed when modifications (removing, adding, or replacing data sets) are made to the real data sets to be displayed by the current displayer.

The current implementation of the method sets a dedicated listener on the data set indicating the size of the bubbles. This listener will allow the size of the bubbles on the screen to be updated when modifications are made to the data set indicating the size of the bubbles.

Reimplemented from IlvAbstractChartDisplayer.

Rogue Wave ViewsCharts Package API Reference Guide

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Rogue Wave Views
Charts Package API Reference Guide