IlvSingleChartDisplayer Class Reference

Base class for single displayers. More...

#include <ilviews/charts/display.h>

Inheritance diagram for IlvSingleChartDisplayer:

Public Member Functions
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 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 IlvColor *	getBackground (IlUInt index=0) const
	Returns the background color of a palette used by the current displayer to display data. More...
virtual void	getClipArea (IlvRect &area, const IlvTransformer *t) const
	Returns the clipping region that is used for the drawing. 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...
virtual IlvDim	getSizeAlongBase () const
	Returns the size along the base for the graphical representation of a given data point. 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...
virtual IlBoolean	isViewable () const
	Indicates whether the graphical representation can be viewed. 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
	IlvSingleChartDisplayer (IlvPalette *palette=0)
	Constructor. More...
	IlvSingleChartDisplayer (IlvInputFile &file)
	Constructor. More...
	IlvSingleChartDisplayer (const IlvSingleChartDisplayer &displayer)
	Constructor. More...
virtual void	boundingBoxOfItem (const IlvChartDisplayerPoints *displayerPoints, IlUInt pointIndex, IlUInt pointsCount, IlvPoint *points, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const
	Returns the bounding box of the item drawn for a given point in screen coordinates corresponding to a data point to display. 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 void	boundingBoxOfPoints (IlvChartDisplayerPoints *displayerPoints, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const
	Returns the bounding box of the graphical representation of projected points. More...
virtual void	computeItem (const IlvChartDisplayerPoints *displayerPoints, IlUInt pointIndex, IlUInt &usedPointsCount, IlvPoint *points, const IlvTransformer *t=0) const =0
	Computes the item that will be displayed for a given point in screen coordinates corresponding to a data point to display. 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...
virtual void	drawItem (const IlvChartDisplayerPoints *displayerPoints, IlUInt pointIndex, IlUInt pointsCount, IlvPoint *points, IlvPalette *itemPalette, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const =0
	Draws the item for a given point in screen coordinates corresponding to a data point to display. 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...
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 IlUInt	getItemPointsCount (const IlvChartDisplayerPoints *displayerPoints) const
	Returns the maximum number of points needed to define an item for the current displayer. 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	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. 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

Base class for single displayers.

Library: ilvcharts

This class is an abstract subclass of IlvAbstractChartDisplayer that defines single displayers that display data with a single basic rendering shape. Examples of single displayers are displayers representing data with markers, polylines, bars, and so on.

See also

IlvAbstractChartDisplayer, IlvBarChartDisplayer, IlvBubbleChartDisplayer, IlvHiLoChartDisplayer, IlvPieChartDisplayer, IlvPolylineChartDisplayer, IlvStepChartDisplayer, IlvScatterChartDisplayer, IlvChartDisplayerPoints.

Constructor & Destructor Documentation

virtual IlvSingleChartDisplayer::~IlvSingleChartDisplayer ( )

virtual

Destructor.

The destructor removes all the data sets in the collection of data sets that will be displayed by the current displayer, deletes the text defined to be used in a legend for the current displayer, and unlocks the palette used by the current displayer.

IlvSingleChartDisplayer::IlvSingleChartDisplayer ( IlvPalette *  palette = 0 )

protected

Constructor.

Initializes a new IlvSingleChartDisplayer instance. The shift offset and the text that will be used in a legend for the current displayer are set to 0 by default.

Parameters

palette

The palette used by the current displayer to display data.

IlvSingleChartDisplayer::IlvSingleChartDisplayer ( IlvInputFile &  file )

protected

Constructor.

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

Parameters

file	The file used to initialize the current displayer.

IlvSingleChartDisplayer::IlvSingleChartDisplayer ( const IlvSingleChartDisplayer &  displayer )

protected

Constructor.

Initializes a new IlvSingleChartDisplayer instance as a copy of displayer.

Parameters

displayer

The object used to initialize the current one.

Member Function Documentation

virtual IlvChartDisplayerPoints* IlvSingleChartDisplayer::allocDisplayerPoints ( ) const

virtual

Allocates and returns an IlvChartDisplayerPoints object.

Allocates and returns the IlvChartDisplayerPoints object that will be used by the current displayer to project and render data. If a factory is associated with the current displayer, the IlvChartDisplayerPointsFactory::create() method is used. If no factory is defined, an instance of the IlvChartDisplayerPoints class is returned.

Returns

A pointer to the allocated IlvChartDisplayerPoints object.

See also

releaseDisplayerPoints().

virtual IlBoolean IlvSingleChartDisplayer::boundingBox ( IlvRect &  bbox, const IlvTransformer *  t = 0  ) const

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.

Implements IlvAbstractChartDisplayer.

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

protectedvirtual

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

The item drawn for a given screen point corresponding to a data point to display depends on the type of the displayer. For example, for a displayer that displays data with 3D bars, the item is a 3D bar extending from this screen point to the abscissa scale.

Note

The points defining the item are computed by using the IlvSingleChartDisplayer::computeItem() method. (See this method for more details.)

Parameters

displayerPoints	The object that stores the points in screen coordinates that have to be displayed by the current displayer.
pointIndex	The index of the point in screen coordinates corresponding to a data point to display for which we want to compute the bounding box of the corresponding item.
pointsCount	The number of points defining the item.
points	The points defining the item for which we want to compute the bounding box.
bbox	The bounding box of the item. The returned bounding box is transformed by t.
takeInfoIntoAccount	Indicates whether the point information must be taken into account for computing the bounding box.
t	The optional transformer.

Reimplemented in IlvPieChartDisplayer, IlvBubbleChartDisplayer, and IlvScatterChartDisplayer.

IlBoolean IlvSingleChartDisplayer::boundingBoxOfPart ( const IlvCoordInterval &  abscissaRange, IlBoolean  shiftOfCycleLength, IlvRect &  partBBox, IlBoolean  takeInfoIntoAccount, const IlvTransformer *  t = 0  ) const

protected

Returns the bounding box of a part of the graphical representation of data.

Computes the bounding box of the graphical representation of the data that are within the abscissa interval defined by abscissaRange and returns it in partBBox.

Parameters

abscissaRange	The abscissa interval used to select the data for which the bounding box is computed.
shiftOfCycleLength	A Boolean value indicating whether the data are shifted by the cycle length before being displayed.
takeInfoIntoAccount	A Boolean value indicating whether the point information must be taken into account for computing the bounding box.
partBBox	The returned bounding box of the graphical representation of the data that are within the abscissa interval abscissaRange.
t	The transformer that is applied to the returned bounding box.

Returns

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

Note

This method is used inside the IlvSingleChartDisplayer::boundingBox() method. Since the graphical representation is drawn by parts (see the IlvSingleChartDisplayer::drawPart() method), the bounding box of the graphical representation of data is also computed by parts. Two parts are considered if the chart that uses the current displayer to display data is in cyclic mode (see the IlvChartGraphic::isInCyclicMode() method). One part is for data that have not been shifted by the cycle length before being displayed, and the other part is for data that have been shifted by the cycle length before being displayed. (See the IlvCoordinateInfo::getFirstCycleRange() and IlvCoordinateInfo::getSecondCycleRange() methods for more details.) Otherwise, only one part is considered.

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

protectedvirtual

Returns the bounding box of the graphical representation of projected points.

Computes the bounding box of the graphical representation from the points expressed in screen coordinates that correspond to the data points to be displayed by the current displayer and returns it in bbox.

At this level of the class hierarchy, the method returns in bbox the bounding box of the points stored in displayerPoints and of the defined point information objects (if any and if the Boolean takeInfoIntoAccount is equal to IlTrue).

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.
bbox	The bounding box of the graphical representation computed from the points in screen coordinates corresponding to the data to display. This returned bounding box is transformed by t.
takeInfoIntoAccount	A Boolean value indicating whether the point information must be taken into account for computing the bounding box.
t	The optional transformer.

Reimplemented in IlvStairChartDisplayer, IlvFixedStepChartDisplayer, IlvPieChartDisplayer, IlvStepChartDisplayer, IlvPolygonChartDisplayer, Ilv3dBarChartDisplayer, IlvHiLoChartDisplayer, IlvBubbleChartDisplayer, IlvBarChartDisplayer, and IlvScatterChartDisplayer.

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

protectedpure virtual

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

The item that will be displayed for a given screen point corresponding to a data point to display depends on the type of the displayer.

For example, for a displayer that displays data with 3D bars, the item that will be displayed for a given screen point corresponding to a data point to display is a 3D bar extending from this screen point to the abscissa scale.

The item that must be drawn is defined by twelve points corresponding to the corners of the three faces of the 3D bar that will be displayed.

Note

The memory that has been allocated for the returned points points defining the item must be sufficient to store the maximum number of points needed to define an item that is returned by the IlvSingleChartDisplayer::getItemPointsCount() method.

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.
pointIndex	The index of the point stored in displayerPoints for which we want to compute the corresponding item to display with the current displayer.
usedPointsCount	The number of computed points defining the item.
points	The points defining the item. These points are transformed by t.
t	The transformer (if any) that is applied to the computed points.

Implemented in IlvStairChartDisplayer, IlvFixedStepChartDisplayer, IlvPieChartDisplayer, IlvStepChartDisplayer, IlvHiLoBarChartDisplayer, Ilv3dBarChartDisplayer, IlvHiLoChartDisplayer, IlvBubbleChartDisplayer, IlvPolylineChartDisplayer, IlvBarChartDisplayer, and IlvScatterChartDisplayer.

virtual IlBoolean IlvSingleChartDisplayer::computeLimitsForDataSelection ( const IlvRect &  clipRect, const IlvCoordInterval &  abscissaRange, const IlvCoordInterval &  ordinateRange, IlvCoordInterval &  abscissaSelectionRange, IlvCoordInterval &  ordinateSelectionRange, IlBoolean &  dataToSelect, const IlvTransformer *  t = 0  ) const

protectedvirtual

Computes the abscissa and ordinate intervals used to select the data to be displayed in a given rectangle.

Given the abscissa and ordinate intervals for all the data points displayed by the current displayer, this method computes the abscissa and ordinate intervals for the data points that will be displayed in the rectangle clipRect. These computed intervals will allow the data points that are needed to draw the part of the graphical representation that appears in the rectangle clipRect to be selected later.

Parameters

clipRect	The rectangle for which we want to compute the abscissa and ordinate intervals of the data points that are displayed inside this rectangle.
abscissaRange	The abscissa interval of all the data points displayed by the current displayer.
ordinateRange	The ordinate interval of all the data points displayed by the current displayer.
abscissaSelectionRange	This parameter is used to return the abscissa interval of the data points that will be displayed in the rectangle clipRect.
ordinateSelectionRange	This parameter is used to return the ordinate interval of the data points that will be displayed in the rectangle clipRect.
dataToSelect	This parameter is used to return a Boolean value indicating whether there will be some data to select (that is, there will be some data points that will be displayed in the rectangle clipRect).
t	The transformer (if any) that has been applied to clipRect.

Returns

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

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

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.

Implements IlvAbstractChartDisplayer.

virtual void IlvSingleChartDisplayer::draw ( IlvPort *  dst, const IlvTransformer *  t = 0, const IlvRegion *  clip = 0  ) const

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.

Implements IlvAbstractChartDisplayer.

virtual void IlvSingleChartDisplayer::drawDataPoint ( IlUInt  dataPtIdx, IlvPort *  dst, const IlvTransformer *  t = 0, const IlvRegion *  clip = 0  ) const

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.

Implements IlvAbstractChartDisplayer.

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

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.

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.

Warning

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.

Implements IlvAbstractChartDisplayer.

virtual void IlvSingleChartDisplayer::drawFill ( IlBoolean  b )

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).

Implements IlvAbstractChartDisplayer.

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

protectedpure virtual

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

The item that is drawn for a given screen point corresponding to a data point to display depends on the type of the displayer. For example, for a displayer that displays data with 3D bars, the item is a 3D bar extending from this screen point to the abscissa scale.

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

Note

The points defining the item points are computed by using the IlvSingleChartDisplayer::computeItem() method. (See this method for more details.)

Parameters

displayerPoints	The object that stores the points in screen coordinates that have to be displayed by the current displayer.
pointIndex	The index of the point in screen coordinates corresponding to a data point to display for which we want to draw the corresponding item.
pointsCount	The number of points defining the item to draw.
points	The points defining the item to draw.
itemPalette	The palette used to draw the item.
dst	The port used for the drawing.
t	The optional transformer.
clip	The optional clipping region.

Implemented in IlvStairChartDisplayer, IlvFixedStepChartDisplayer, IlvPieChartDisplayer, IlvStepChartDisplayer, IlvHiLoBarChartDisplayer, Ilv3dBarChartDisplayer, IlvHiLoChartDisplayer, IlvPolygonChartDisplayer, IlvBubbleChartDisplayer, IlvPolylineChartDisplayer, IlvBarChartDisplayer, and IlvScatterChartDisplayer.

virtual void IlvSingleChartDisplayer::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 drawing is performed in the port dst using the clipping region clip. It is bounded by the rectangle legendArea.

The current implementation of the method simply draws a rectangle on the limits of legendArea with the foreground color of the palette defined for the current displayer and fills this rectangle with the background color of this palette.

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.

Implements IlvAbstractChartDisplayer.

Reimplemented in IlvStairChartDisplayer, IlvFixedStepChartDisplayer, IlvHiLoBarChartDisplayer, IlvPieChartDisplayer, IlvStepChartDisplayer, IlvPolygonChartDisplayer, IlvHiLoChartDisplayer, IlvBubbleChartDisplayer, IlvPolylineChartDisplayer, and IlvScatterChartDisplayer.

void IlvSingleChartDisplayer::drawPart ( const IlvCoordInterval &  abscissaRange, IlBoolean  shiftOfCycleLength, IlvPort *  dst, const IlvTransformer *  t = 0, const IlvRegion *  clip = 0  ) const

protected

Draws a part of the graphical representation of data.

Draws the graphical representation of the data that are within the abscissa interval defined by abscissaRange. shiftOfCycleLength indicates whether the data must be shifted by the cycle length before being displayed. The drawing is performed in the given port dst using the transformer t and the clipping region clip.

Parameters

abscissaRange	The abscissa interval used to select the data to display.
shiftOfCycleLength	A Boolean value indicating whether the data must be shifted by the cycle length before being displayed.
dst	The port used for the drawing.
t	The optional transformer.
clip	The optional clipping region.

Note

This method is used inside the IlvSingleChartDisplayer::draw() method to draw the graphical representation by parts. If the chart that uses the current displayer to display data is in a cyclic mode (see the IlvChartGraphic::isInCyclicMode() method), the graphical representation is displayed in two parts. One part displays data without shifting the data by the cycle length. The other part displays the data by shifting the data by the cycle length. (See the IlvCoordinateInfo::getFirstCycleRange() and IlvCoordinateInfo::getSecondCycleRange() methods for more details.) Otherwise, the graphical representation is displayed in one part.

virtual void IlvSingleChartDisplayer::drawPointInfos ( const IlvChartDisplayerPoints *  displayerPoints, IlvPort *  dst, const IlvTransformer *  t = 0, const IlvRegion *  clip = 0, const IlvChartDataSet *  dataSet = 0  ) const

protectedvirtual

Draws the point information defined for the data points to be displayed.

Draws the point information defined for the data points to be displayed by the current displayer, using the points expressed in screen coordinates that correspond to these data points. The drawing is performed in the given port dst using the transformer t and the clipping region clip by calling the IlvChartDataPointInfo::draw() method on all the point information defined for the data points to display.

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.
dataSet	The data set associated with the projected data points. If this parameter is set to 0, the first data set of the current displayer is considered.

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

protectedvirtual

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 in IlvStairChartDisplayer, IlvPieChartDisplayer, Ilv3dBarChartDisplayer, IlvPolygonChartDisplayer, IlvHiLoChartDisplayer, IlvBubbleChartDisplayer, and IlvPolylineChartDisplayer.

virtual IlvColor* IlvSingleChartDisplayer::getBackground ( IlUInt  index = 0 ) const

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.

Implements IlvAbstractChartDisplayer.

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

virtual

Returns the clipping region that is used for the drawing.

The current implementation of the method returns in area the area obtained by the IlvSingleChartDisplayer::getDataDisplayArea() method expanded along the base by the shift offset if it is different from 0 (obtained by the IlvSingleChartDisplayer::getShiftOffset() method). The term base of a chart refers to the abscissa scale of this chart.

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.

Implements IlvAbstractChartDisplayer.

Reimplemented in IlvFixedStepChartDisplayer, IlvPieChartDisplayer, Ilv3dBarChartDisplayer, IlvHiLoChartDisplayer, IlvBubbleChartDisplayer, IlvBarChartDisplayer, and IlvScatterChartDisplayer.

void IlvSingleChartDisplayer::getDataDisplayArea	(	IlvRect &	dataDisplayArea,
		const IlvTransformer *	t = 0
	)		const

Returns the bounds of the data display area.

Returns in dataDisplayArea the maximum area where data can be displayed by the current displayer. This area is referred to as the data display area. It determines the limits outside of which the current displayer cannot display data.

Parameters

dataDisplayArea	The returned data display area.
t	The transformer that is applied to the returned data display area.

IlvChartDisplayerPointsFactory* IlvSingleChartDisplayer::getDisplayerPointsFactory

(

)

const

Returns the factory used to create IlvChartDisplayerPoints instances.

Returns

A pointer to the factory associated with the current displayer.

See also

setDisplayerPointsFactory().

virtual IlUInt IlvSingleChartDisplayer::getDisplayersCount ( ) const

virtual

Returns the number of displayers.

Returns

1.

Implements IlvAbstractChartDisplayer.

virtual IlUInt IlvSingleChartDisplayer::getDisplayItem ( IlvChartDataSet *&  dataSet, const IlvPoint &  viewPoint, const IlvTransformer *  t  ) const

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.
t	The optional transformer.

Returns

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

Implements IlvAbstractChartDisplayer.

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

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.

Implements IlvAbstractChartDisplayer.

virtual IlvColor* IlvSingleChartDisplayer::getForeground ( IlUInt  index = 0 ) const

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.

Implements IlvAbstractChartDisplayer.

virtual const char* IlvSingleChartDisplayer::getInternalLegendText ( IlUInt  index = 0 ) const

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.

Implements IlvAbstractChartDisplayer.

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

protectedvirtual

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

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

Parameters

displayerPoints

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

Returns

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

Reimplemented in IlvStairChartDisplayer, IlvFixedStepChartDisplayer, IlvPieChartDisplayer, IlvStepChartDisplayer, IlvHiLoBarChartDisplayer, Ilv3dBarChartDisplayer, IlvHiLoChartDisplayer, IlvBubbleChartDisplayer, IlvPolylineChartDisplayer, IlvBarChartDisplayer, and IlvScatterChartDisplayer.

virtual const char* IlvSingleChartDisplayer::getLegendText ( IlUInt  index = 0 ) const

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.

Implements IlvAbstractChartDisplayer.

Reimplemented in IlvHiLoChartDisplayer.

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

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.

Implements IlvAbstractChartDisplayer.

IlUInt IlvSingleChartDisplayer::getNearestPointInsidePart ( const IlvCoordInterval &  abscissaRange, IlBoolean  shiftOfCycleLength, IlvChartDataSet *&  dataSet, const IlvPoint &  viewPoint, IlvDim  distance, IlvPoint &  point, const IlvTransformer *  t = 0  ) const

protected

Returns the nearest data point within a given abscissa range.

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 the point viewPoint. The data point is searched for only within the abscissa interval defined by abscissaRange.

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

abscissaRange	The abscissa interval that is considered in order to find the nearest data point.
shiftOfCycleLength	A Boolean value indicating whether the data have been shifted by the cycle length before being displayed.
dataSet	The data set in which we get a data point.
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.

Note

This method is used inside the IlvSingleChartDisplayer::getNearestPoint() method. Since the graphical representation is drawn by parts (see the IlvSingleChartDisplayer::drawPart() method), the search for the nearest data point of a given screen point is also performed by parts. Two parts are considered if the chart that uses the current displayer to display data is in cyclic mode (see the IlvChartGraphic::isInCyclicMode() method). One part is for data that have not been shifted by the cycle length before being displayed and the other part is for data that have been shifted by the cycle length before being displayed. (See the IlvCoordinateInfo::getFirstCycleRange() and IlvCoordinateInfo::getSecondCycleRange() methods for more details). Otherwise, only one part is considered.

virtual IlvPalette* IlvSingleChartDisplayer::getPalette ( IlUInt  index = 0 ) const

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.

Implements IlvAbstractChartDisplayer.

virtual IlvPointInfoCollection* IlvSingleChartDisplayer::getPointInfoCollection ( const IlvChartDataSet *  dataSet ) const

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.

Implements IlvAbstractChartDisplayer.

IlvPos IlvSingleChartDisplayer::getShiftOffset

(

)

const

Returns the offset by which the graphical representation of data is shifted along the base of the chart.

The term base of a chart refers to the abscissa scale of this chart. By default, the shift offset is equal to 0. This offset is useful when displaying side-by-side charts in which the graphical representations are shifted along the abscissa.

Returns

The offset by which the graphical representation of data displayed by the current displayer is shifted.

virtual IlvDim IlvSingleChartDisplayer::getSizeAlongBase ( ) const

virtual

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

The term base of a chart refers to the abscissa scale of this chart. This size is useful for displaying side-by-side charts. It is used to indicate the offset by which the graphical representation for a data point must be shifted so it can be drawn next to the graphical representation for another data point. For example, for a bar displayer, the size along the base corresponds to the width of a bar.

Returns

0 by default.

Reimplemented in IlvFixedStepChartDisplayer, IlvBubbleChartDisplayer, IlvBarChartDisplayer, IlvHiLoChartDisplayer, and IlvScatterChartDisplayer.

IlBoolean IlvSingleChartDisplayer::isDrawingFill

(

)

const

Returns the filling mode for the current displayer.

See the IlvAbstractChartDisplayer::drawFill() method for more details.

Returns

IlTrue if the shape of the graphical representation of data is displayed filled and IlFalse otherwise.

virtual void IlvSingleChartDisplayer::releaseDisplayerPoints ( IlvChartDisplayerPoints *  dispPts ) const

virtual

Releases an IlvChartDisplayerPoints object used by the current displayer.

Releases the IlvChartDisplayerPoints object dispPts when it is no more used by the current displayer. If a factory is associated with the current displayer, the IlvChartDisplayerPointsFactory::release() method is used. If no factory is defined, the delete operator is called on dispPts.

Parameters

dispPts

An IlvChartDisplayerPoints object that is used by the current displayer.

See also

allocDisplayerPoints().

virtual IlvDoublePoint* IlvSingleChartDisplayer::selectDataPointsForPoint ( IlUInt  dataPtIdx, IlUInt &  count, IlUInt *&  dataPtIdxes  ) const

protectedvirtual

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.

For example, for a displayer displaying a data set with a polyline, to be able to draw the graphical representation for a data point at a given index of the data set, we must select the data point at this index plus the data point at the index before (if it exists) and the data point at the index after (if it exists). The data points thus selected will allow the part of the polyline passing through the considered data point at a given index to be drawn.

The current implementation of this method simply returns the data point at the index dataPtIdx and stores this index in the array dataPtIdxes.

Parameters

dataPtIdx	The index of the data point(s) for which we want to select the data points that are needed to draw the graphical representation for the data point(s) at this index.
count	The number of selected data points.
dataPtIdxes	An array of the indexes of the selected data points.

Returns

An array of the selected data points.

Note

The allocated arrays of data points and data point indexes that are returned by this method must not be deleted since they are maintained internally.

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

virtual IlvDoublePoint* IlvSingleChartDisplayer::selectDataPointsForRange ( const IlvCoordInterval &  abscissaRange, IlUInt &  pointCount, IlUInt *&  dataPtIdxes, const IlvTransformer *  t = 0, const IlvRect *  clip = 0  ) const

protectedvirtual

Selects And returns the data points to display that are within a given abscissa interval.

The current implementation of the method takes the clipping region clip into account to select from the data points that are within abscissaRange only those that are needed to draw inside the clipping region.

Parameters

abscissaRange	The abscissa interval used to select the data points.
pointCount	The number of selected data points.
dataPtIdxes	An array of the indexes of the selected data points.
t	The transformer (if any) that is used for drawing the data points by the current displayer.
clip	The clipping region (if any) that is used for drawing the data points by the current displayer.

Returns

An array of the selected data points.

Note

The allocated arrays of data points and data points indexes that are returned by this method must not be deleted since they are maintained internally.

Reimplemented in IlvPieChartDisplayer.

virtual IlvDoublePoint* IlvSingleChartDisplayer::selectDataPointsInRect ( IlUInt &  pointCount, IlUInt *&  dataPtIndexes, IlvRect  pickRect, const IlvTransformer *  t = 0  ) const

protectedvirtual

Selects the data points that are rendered within a rectangle.

Parameters

pointCount	Is set to the number of selected data points.
dataPtIndexes	An array of the indexes of the selected data points. You must not delete this array since it is maintained internally.
pickRect	The rectangle, in the port coordinates system, that locates the points to be selected.
t	The transformer (if any) that is used for drawing the data points by the current displayer.

Returns

An array of the selected data points. You must not delete this array since it is maintained internally.

virtual void IlvSingleChartDisplayer::setBackground ( IlvColor *  color, IlUInt  index = 0  )

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.

Implements IlvAbstractChartDisplayer.

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

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.

Implements IlvAbstractChartDisplayer.

IlvChartDisplayerPointsFactory* IlvSingleChartDisplayer::setDisplayerPointsFactory

(

IlvChartDisplayerPointsFactory *

factory

)

Sets the factory used to create IlvChartDisplayerPoints instances.

The factory is used by the allocDisplayerPoints() and releaseDisplayerPoints() methods.

Parameters

factory

The new factory.

Returns

The previous factory.

See also

getDisplayerPointsFactory().

virtual void IlvSingleChartDisplayer::setForeground ( IlvColor *  color, IlUInt  index = 0  )

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.

Implements IlvAbstractChartDisplayer.

virtual void IlvSingleChartDisplayer::setLegendItems ( IlvChartLegend *  legend ) const

virtual

Sets the legend items associated with the current displayer.

Sets the legend items associated with the current displayer on the legend legend.

The current implementation simply calls the IlvChartLegend::addLegendItem() method one time if the current displayer can be viewed (see the IlvAbstractChartDisplayer::isViewable() method).

See the IlvAbstractChartDisplayer::setLegendItems() method for more details.

Parameters

legend

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

Implements IlvAbstractChartDisplayer.

Reimplemented in IlvPieChartDisplayer.

virtual void IlvSingleChartDisplayer::setLegendText ( const char *  text, IlUInt  index = 0  )

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.

Implements IlvAbstractChartDisplayer.

virtual void IlvSingleChartDisplayer::setMode ( IlvDrawMode  mode )

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.

Implements IlvAbstractChartDisplayer.

Reimplemented in IlvPieChartDisplayer, Ilv3dBarChartDisplayer, and IlvHiLoChartDisplayer.

virtual void IlvSingleChartDisplayer::setOverwrite ( IlBoolean  o )

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.

Implements IlvAbstractChartDisplayer.

Reimplemented in IlvPieChartDisplayer, Ilv3dBarChartDisplayer, and IlvHiLoChartDisplayer.

virtual void IlvSingleChartDisplayer::setPalette ( IlvPalette *  pal, IlUInt  index = 0  )

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.

Implements IlvAbstractChartDisplayer.

Reimplemented in Ilv3dBarChartDisplayer.

virtual void IlvSingleChartDisplayer::setPointInfoCollection ( const IlvChartDataSet *  dataSet, IlvPointInfoCollection *  ptInfoCollection  )

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.

Implements IlvAbstractChartDisplayer.

void IlvSingleChartDisplayer::setShiftOffset

(

IlvPos

offset

)

Sets the offset by which the graphical representation of data is shifted along the base of the chart.

The term base of a chart refers to the abscissa scale of this chart.

Parameters

offset

The new offset used to shift the graphical representation of data displayed by the current displayer.

Note

This method is used internally and should not be used directly by the user. By default, the shift offset is set to 0. This offset is used by the side-by-side displayers to draw graphical representations that are shifted along the abscissa. In this case, an appropriate shift offset is automatically set in the IlvSideBySideChartDisplayer::updateDisplayers() method and, therefore, does not need to be set by hand.

virtual void IlvSingleChartDisplayer::treatPointsOutOfAbscissaLimits ( const IlvRect &  dataDisplayArea, IlvChartDisplayerPoints *  displayerPoints, const IlvCoordInterval &  abscissaRange, const IlvPoint &  minLimit, const IlvPoint &  maxLimit  ) const

virtual

Treats the occurrence of points in screen coordinates that are outside the abscissa limits.

The current implementation of the method simply removes the screen points stored in displayerPoints that are outside the abscissa limits. This means that they are before the minimum value considered for the abscissa or after the maximum value considered for the ordinate.

Note

The area dataDisplayArea, the points minLimit and maxLimit, and the points in screen coordinates stored in displayerPoints are considered to be already transformed.

Parameters

dataDisplayArea	The data display area used by the current displayer.
displayerPoints	The object that stores the points in screen coordinates that have to be displayed by the current displayer.
abscissaRange	The interval of values that is considered for the abscissa.
minLimit	The point on the abscissa scale that corresponds to the minimum value that is considered for the abscissa.
maxLimit	The point on the abscissa scale that corresponds to the maximum value that is considered for the abscissa.

Reimplemented in IlvStepChartDisplayer, and IlvPolylineChartDisplayer.

virtual IlBoolean IlvSingleChartDisplayer::usePointInfo ( ) const

virtual

Indicates whether point information collections are defined.

Returns

IlTrue if at least one point information collection is defined for one of the real data sets to be displayed by the current displayer (either the point information collection is defined only to be used by the current displayer or it has been set directly on the data set). Otherwise, it returns IlFalse.

virtual void IlvSingleChartDisplayer::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 from IlvAbstractChartDisplayer.