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IlvScatterChartDisplayer Class Reference

Class for scatter displayers. More...

#include <ilviews/charts/scatter.h>

Inheritance diagram for IlvScatterChartDisplayer:
IlvSingleChartDisplayer IlvAbstractChartDisplayer IlvValueInterface

Public Member Functions

 IlvScatterChartDisplayer (IlvMarkerType marker=IlvMarkerFilledSquare, IlvDim markerSize=IlvDefaultMarkerSize, IlvPalette *palette=0)
 Constructor. 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 getClipArea (IlvRect &area, const IlvTransformer *t) const
 Returns the clipping region that is used for the drawing. More...
 
IlvMarkerType getMarker () const
 Returns the type of the markers used to represent the data. More...
 
IlvDim getMarkerSize () const
 Returns the size of the markers used to represent the data. More...
 
virtual IlvDim getSizeAlongBase () const
 Returns the size along the base for the graphical representation of a given data point. More...
 
void setMarker (IlvMarkerType marker)
 Sets the type of the markers used to represent the data. More...
 
void setMarkerSize (IlvDim size)
 Sets the size of the markers used to represent the data. More...
 
- Public Member Functions inherited from IlvSingleChartDisplayer
virtual ~IlvSingleChartDisplayer ()
 Destructor. More...
 
virtual IlvChartDisplayerPointsallocDisplayerPoints () 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 IlvColorgetBackground (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...
 
IlvChartDisplayerPointsFactorygetDisplayerPointsFactory () 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 IlvColorgetForeground (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 IlvPalettegetPalette (IlUInt=0) const
 Returns a palette used by the current displayer to display data. More...
 
virtual IlvPointInfoCollectiongetPointInfoCollection (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...
 
IlvChartDisplayerPointsFactorysetDisplayerPointsFactory (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 IlvAbstractChartDisplayercopy () 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...
 
IlvChartGraphicgetChartGraphic () const
 Returns the chart graphic which uses the current displayer. More...
 
IlvChartDataSetgetDataSet (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...
 
IlvCoordinateInfogetOrdinateInfo () const
 Deprecated Returns the coordinate information associated with the ordinate scale considered to display data. More...
 
const IlvCompositeChartDisplayergetParentDisplayer () const
 Returns the parent displayer. More...
 
virtual IlvChartDataPointInfogetPointInfo (IlUInt dataPtIdx, const IlvChartDataSet *dataSet=0) const
 Returns the point information associated with a given data point. More...
 
virtual IlvPalettegetProjectedPointsPalette () const
 Returns the palette used to display out-of-bounds values. More...
 
IlvChartDataSetgetRealDataSet (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 IlvCombinedChartDataSetgetVirtualDataSet (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...
 
IlvOutputFilesave (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
 Returns 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=IlTrue, const IlvTransformer *t=0) const
 Returns 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 &usedPoints, 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, 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...
 
- 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...
 
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...
 
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 IlvDoublePointselectDataPointsForPoint (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 IlvDoublePointselectDataPointsForRange (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 IlvDoublePointselectDataPointsInRect (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 IlvAbstractChartDisplayerLoad (IlvInputFile &file)
 Reads a displayer object from a file. More...
 

Detailed Description

Class for scatter displayers.

Library: ilvcharts

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

The scatter displayer displays a unique data set. This displayer can be used with any type of projection (see the IlvAbstractProjector class for more details).

The images below show data sets represented with scatter displayers in a Cartesian chart (on the left) and a polar chart (on the right).

See also
IlvSingleChartDisplayer.

Constructor & Destructor Documentation

IlvScatterChartDisplayer::IlvScatterChartDisplayer ( IlvMarkerType  marker = IlvMarkerFilledSquare,
IlvDim  markerSize = IlvDefaultMarkerSize,
IlvPalette palette = 0 
)

Constructor.

Initializes a new IlvScatterChartDisplayer object.

Parameters
markerThe type of the markers that will be used to represent the data.
markerSizeThe size of the markers.
paletteThe palette that will be used to display the markers.

Member Function Documentation

virtual void IlvScatterChartDisplayer::boundingBoxOfItem ( const IlvChartDisplayerPoints displayerPoints,
IlUInt  pointIndex,
IlUInt  pointCount,
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.

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 just returns the bounding box of the marker centered on the screen point stored in points, since the item that is drawn for a given screen point corresponding to a data point to display is a marker.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvScatterChartDisplayer::boundingBoxOfPoints ( IlvChartDisplayerPoints displayerPoints,
IlvRect bbox,
IlBoolean  takeInfoIntoAccount = IlTrue,
const IlvTransformer t = 0 
) const
protectedvirtual

Returns 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 just calls the IlvSingleChartDisplayer::boundingBoxOfPoints method and expands the computed bounding box by the size of the markers.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvScatterChartDisplayer::computeItem ( const IlvChartDisplayerPoints displayerPoints,
IlUInt  pointIndex,
IlUInt usedPoints,
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 marker centered on this screen point.

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

Implements IlvSingleChartDisplayer.

virtual void IlvScatterChartDisplayer::drawItem ( const IlvChartDisplayerPoints displayerPoints,
IlUInt  pointIndex,
IlUInt  pointCount,
IlvPoint points,
IlvPalette itemPalette,
IlvPort dst,
const IlvTransformer t,
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 just draws a marker centered on the screen point stored in points since the item that is drawn for a given screen point corresponding to a data point to display is a marker. The marker is drawn with the palette itemPalette.

Implements IlvSingleChartDisplayer.

virtual void IlvScatterChartDisplayer::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 marker.

Parameters
dstThe port used for the drawing.
legendAreaThe area where the drawing is performed.
itemPalThe palette of the legend item associated with the current displayer.
clipThe optional clipping region.
clientDataThe client data defined for the legend item associated with the current displayer.

Reimplemented from IlvSingleChartDisplayer.

virtual void IlvScatterChartDisplayer::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::getClipArea method expanded by the size of the marker (obtained by the IlvScatterChartDisplayer::getMarkerSize method).

Parameters
areaThe clipping region that is used to clip the graphical representation of data drawn by the current displayer.
tThe transformer that is applied to the returned clipping region.

Reimplemented from IlvSingleChartDisplayer.

virtual IlUInt IlvScatterChartDisplayer::getItemPointsCount ( const IlvChartDisplayerPoints displayerPoints) const
protectedvirtual

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

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

Parameters
displayerPointsThe object that stores the points in screen coordinates that have to be displayed by the current displayer.
Returns
1.

Reimplemented from IlvSingleChartDisplayer.

IlvMarkerType IlvScatterChartDisplayer::getMarker ( ) const

Returns the type of the markers used to represent the data.

Returns
The type of the markers used to represent the data.
IlvDim IlvScatterChartDisplayer::getMarkerSize ( ) const

Returns the size of the markers used to represent the data.

Returns
The size of the markers used to represent the data.
virtual IlvDim IlvScatterChartDisplayer::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 size of the markers used to represent the data.

Reimplemented from IlvSingleChartDisplayer.

void IlvScatterChartDisplayer::setMarker ( IlvMarkerType  marker)

Sets the type of the markers used to represent the data.

Parameters
markerThe new type of the markers used to represent the data.
void IlvScatterChartDisplayer::setMarkerSize ( IlvDim  size)

Sets the size of the markers used to represent the data.

Parameters
sizeThe new size of the markers used to represent the data.

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