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Rogue Wave Views Charts Package API Reference Guide |
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Rogue Wave Views Charts Package API Reference Guide |
Rogue Wave Views Documentation Home |
Class for bar displayers. More...
#include <ilviews/charts/bar.h>
Public Member Functions | |
| IlvBarChartDisplayer (IlvDim width=IlvChartDisplayerWidth, IlvPalette *palette=0) | |
| Constructor. More... | |
| virtual void | getClipArea (IlvRect &area, const IlvTransformer *t) const |
| Returns the clipping region that is used for the drawing. More... | |
| IlvDim | getSize () const |
| Returns the size of the bars 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... | |
| IlUInt | getStrokeThreshold () const |
| Returns the minimum width of a bar, below which the stroke of a rendering style is not used. More... | |
| virtual IlvDim | getWidth () const |
| Returns the width of the bars used to represent the data. More... | |
| IlUInt | getWidthPercent () const |
| Returns the width percentage of the bars used to represent the data. More... | |
| virtual IlBoolean | isFilled () const |
| Indicates whether the graphical representation is filled. More... | |
| void | setStrokeThreshold (IlUInt threshold) |
| Specifies the minimum width of a bar, below which the stroke of a rendering style is not used. More... | |
| virtual void | setWidth (IlvDim width) |
| Sets the width of the bars used to represent the data. More... | |
| void | setWidthPercent (IlUInt width) |
| Sets the width percentage of the space between two bars. More... | |
 Public Member Functions inherited from IlvSingleChartDisplayer | |
| virtual | ~IlvSingleChartDisplayer () |
| Destructor. More... | |
| virtual IlvChartDisplayerPoints * | allocDisplayerPoints () const |
Allocates and returns an IlvChartDisplayerPoints object. More... | |
| virtual IlBoolean | boundingBox (IlvRect &bbox, const IlvTransformer *t=0) const |
| Returns the bounding box of the graphical representation of data. More... | |
| virtual IlBoolean | dataPointBBox (IlUInt dataPtIdx, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const |
| Returns the bounding box of the graphical representation of the data points at a given index. More... | |
| virtual void | draw (IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the graphical representation of data. More... | |
| virtual void | drawDataPoint (IlUInt dataPtIdx, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the graphical representation of the data point(s) at a given index. More... | |
| virtual void | drawDataPoints (IlUInt iMin, IlUInt iMax, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the graphical representation of the data points between a given interval. More... | |
| virtual void | drawFill (IlBoolean b) |
| Sets the filling mode of the displayer. More... | |
| virtual 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... | |
| void | getDataDisplayArea (IlvRect &dataDisplayArea, const IlvTransformer *t=0) const |
| Returns the bounds of the data display area. More... | |
| IlvChartDisplayerPointsFactory * | getDisplayerPointsFactory () const |
Returns the factory used to create IlvChartDisplayerPoints instances. More... | |
| virtual IlUInt | getDisplayersCount () const |
| Returns the number of displayers. More... | |
| virtual IlUInt | getDisplayItem (IlvChartDataSet *&dataSet, const IlvPoint &viewPoint, const IlvTransformer *t) const |
| Returns the item to which a view point corresponds. More... | |
| virtual IlBoolean | getDisplayPoint (const IlvChartDataSet *dataSet, IlUInt dataPtIdx, IlvPoint &point, const IlvTransformer *t=0) const |
| Returns the corresponding screen point for a data point. More... | |
| virtual IlvColor * | getForeground (IlUInt index=0) const |
| Returns the foreground color of a palette used by the current displayer to display data. More... | |
| virtual const char * | getInternalLegendText (IlUInt index=0) const |
| Returns the legend text stored in the current displayer. More... | |
| virtual const char * | getLegendText (IlUInt index=0) const |
| Returns the text that will be used in a legend for the current displayer. More... | |
| virtual IlUInt | getNearestPoint (IlvChartDataSet *&dataSet, const IlvPoint &viewPoint, IlvDim distance, IlvPoint &point, const IlvTransformer *t=0) const |
| Returns the nearest data point. More... | |
| virtual IlvPalette * | getPalette (IlUInt=0) const |
| Returns a palette used by the current displayer to display data. More... | |
| virtual IlvPointInfoCollection * | getPointInfoCollection (const IlvChartDataSet *dataSet) const |
| Returns the point information collection defined to be used to display a given data set. More... | |
| IlvPos | getShiftOffset () const |
| Returns the offset by which the graphical representation of data is shifted along the base of the chart. More... | |
| IlBoolean | isDrawingFill () const |
| Returns the filling mode for the current displayer. More... | |
| virtual void | releaseDisplayerPoints (IlvChartDisplayerPoints *dispPts) const |
Releases an IlvChartDisplayerPoints object used by the current displayer. More... | |
| virtual void | setBackground (IlvColor *color, IlUInt index=0) |
| Sets the background color of a palette used by the current displayer to display data. More... | |
| virtual IlBoolean | setDataPoint (IlvChartDataSet *dataSet, IlUInt dataPtIdx, const IlvPoint &point, const IlvTransformer *t=0) const |
| Sets the corresponding data point from a screen point. More... | |
| IlvChartDisplayerPointsFactory * | setDisplayerPointsFactory (IlvChartDisplayerPointsFactory *factory) |
Sets the factory used to create IlvChartDisplayerPoints instances. More... | |
| virtual void | setForeground (IlvColor *color, IlUInt index=0) |
| Sets the foreground color of a palette used by the current displayer to display data. More... | |
| virtual void | setLegendItems (IlvChartLegend *legend) const |
| Sets the legend items associated with the current displayer. More... | |
| virtual void | setLegendText (const char *text, IlUInt index=0) |
| Sets the text that will be used in a legend for the current displayer. More... | |
| virtual void | setMode (IlvDrawMode mode) |
| Sets the drawing mode. More... | |
| virtual void | setOverwrite (IlBoolean o) |
| Sets the overwrite mode. More... | |
| virtual void | setPalette (IlvPalette *pal, IlUInt index=0) |
| Sets a palette used by the current displayer to display data. More... | |
| virtual void | setPointInfoCollection (const IlvChartDataSet *dataSet, IlvPointInfoCollection *ptInfoCollection) |
| Sets the point information collection that will be used to display a given data set. More... | |
| void | setShiftOffset (IlvPos offset) |
| Sets the offset by which the graphical representation of data is shifted along the base of the chart. More... | |
| virtual void | treatPointsOutOfAbscissaLimits (const IlvRect &dataDisplayArea, IlvChartDisplayerPoints *displayerPoints, const IlvCoordInterval &abscissaRange, const IlvPoint &minLimit, const IlvPoint &maxLimit) const |
| Treats the occurrence of points in screen coordinates that are outside the abscissa limits. More... | |
| virtual IlBoolean | usePointInfo () const |
| Indicates whether point information collections are defined. More... | |
| virtual void | write (IlvOutputFile &file) const |
| Writes the attributes of the current object in a file. More... | |
| Public Member Functions inherited from IlvAbstractChartDisplayer | |
| virtual | ~IlvAbstractChartDisplayer () |
| Destructor. More... | |
| void | addDataSet (IlvChartDataSet *dataSet) |
| Adds a real data set to be displayed by the current displayer. More... | |
| virtual IlBoolean | canBeProjectedIfOutOfBounds () const |
| Indicates whether the graphical representation can be projected when it is out-of-bounds. More... | |
| virtual IlvAbstractChartDisplayer * | copy () const =0 |
| Virtual copy constructor. More... | |
| IlBoolean | dataPointToDisplay (const IlvDoublePoint &dataPoint, IlvPoint &point, const IlvTransformer *t=0) const |
| Projects a data point into screen coordinates. More... | |
| virtual IlBoolean | displayDataSet (const IlvChartDataSet *dataSet) const |
| Indicates whether the current displayer displays a data set. More... | |
| IlBoolean | displayToDataPoint (const IlvPoint &point, IlvDoublePoint &dataPoint, const IlvTransformer *t=0) const |
| Inversely projects a screen point to retrieve the corresponding data point. More... | |
| IlvChartGraphic * | getChartGraphic () const |
| Returns the chart graphic which uses the current displayer. More... | |
| IlvChartDataSet * | getDataSet (IlUInt index=0) const |
| Returns a data set used by the current displayer. More... | |
| IlUInt | getDataSetsCount () const |
| Returns the number of data sets used by the current displayer. More... | |
| IlUInt | getMaxDataSetsCount () const |
| Returns the maximum number of real data sets that the current displayer is allowed to display. More... | |
| const char * | getName () const |
| Returns the name of the current displayer. More... | |
| IlvCoordinateInfo * | getOrdinateInfo () const |
| Deprecated Returns the coordinate information associated with the ordinate scale considered to display data. More... | |
| const IlvCompositeChartDisplayer * | getParentDisplayer () const |
| Returns the parent displayer. More... | |
| virtual IlvChartDataPointInfo * | getPointInfo (IlUInt dataPtIdx, const IlvChartDataSet *dataSet=0) const |
| Returns the point information associated with a given data point. More... | |
| virtual IlvPalette * | getProjectedPointsPalette () const |
| Returns the palette used to display out-of-bounds values. More... | |
| IlvChartDataSet * | getRealDataSet (IlUInt index=0) const |
| Returns a real data set to be displayed by the current displayer. More... | |
| IlUInt | getRealDataSetsCount () const |
| Returns the number of real data sets. More... | |
| virtual IlvCombinedChartDataSet * | getVirtualDataSet (const IlvChartDataSet *dataSet, IlUInt &index) const |
| Returns a virtual data set used by the current displayer. More... | |
| virtual IlBoolean | graphicalRepresentationByDataPoint () const |
| Indicates whether there is a graphical representation by data point. More... | |
| virtual void | insertDataSet (IlvChartDataSet *dataSet, IlUInt index=IlvLastPositionIndex) |
| Inserts a real data set to be displayed by the current displayer. More... | |
| virtual IlBoolean | isContinuous () const |
| Indicates whether the graphical representation is continuous. More... | |
| virtual IlBoolean | 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 | |
| virtual void | boundingBoxOfPoints (IlvChartDisplayerPoints *dspPts, IlvRect &bbox, IlBoolean takeInfoIntoAccount, const IlvTransformer *t=0) const |
| Computes the bounding box of the graphical representation from points in screen coordinates corresponding to the data points to display. More... | |
| virtual void | computeItem (const IlvChartDisplayerPoints *dspPts, IlUInt pointIndex, IlUInt &usedPointsCount, IlvPoint *points, const IlvTransformer *t=0) const |
| Computes the item that will be displayed for a given point in screen coordinates corresponding to a data point to display. More... | |
| virtual void | drawItem (const IlvChartDisplayerPoints *dspPts, IlUInt pointIndex, IlUInt pointCount, IlvPoint *points, IlvPalette *itemPalette, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the item for a given point in screen coordinates corresponding to a data point to display. More... | |
| virtual IlUInt | getItemPointsCount (const IlvChartDisplayerPoints *dspPts) 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... | |
| 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 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 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... | |
Class for bar displayers.
Library: ilvcharts
This class is a subclass of IlvSingleChartDisplayer which allows you to represent data with bars.
The bar 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 bar displayers in a Cartesian chart (on the left) and a polar chart (on the right).
IlvSingleChartDisplayer. | IlvBarChartDisplayer::IlvBarChartDisplayer | ( | IlvDim | width = IlvChartDisplayerWidth, |
| IlvPalette * | palette = 0 |
||
| ) |
Constructor.
Initializes a new IlvBarChartDisplayer object.
| width | The width of the bars that will be used to represent the data. |
| palette | The palette that will be used to display the bars. |
|
protectedvirtual |
Computes the bounding box of the graphical representation from points in screen coordinates corresponding to the data points to display.
See the IlvSingleChartDisplayer::boundingBoxOfPoints method for more details.
This method calls the IlvSingleChartDisplayer::boundingBoxOfPoints method, then enlarges the computed bounding box by extending it to the origin (see the IlvBarChartDisplayer::isFilled method for more information), and finally expands it by half the width of the bars.
Reimplemented from IlvSingleChartDisplayer.
Reimplemented in Ilv3dBarChartDisplayer.
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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 dspPts 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.)
The item that will be displayed for a given screen point corresponding to a data point is a bar. This bar is defined by five points: four points corresponding to the corners of the bar and one screen point corresponding to the data point for which the item is displayed. The following figure shows these points. The indexes at which the points are stored in the array points that is used to return the points defining the item are displayed next to the points.
The number of computed points defining the item (that is, 5) is returned in usedPointsCount.
Implements IlvSingleChartDisplayer.
Reimplemented in Ilv3dBarChartDisplayer.
|
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 dspPts object. This object stores the points in screen coordinates corresponding to the data points that have to be displayed by the current displayer. (See the IlvSingleChartDisplayer::drawItem method for more details.)
This method draws the bar defined by the points stored in points. A polyline is drawn between the first and the fifth point with the foreground color of the palette itemPalette. The bar is filled with the background color of the palette itemPalette if the method IlvSingleChartDisplayer::isDrawingFill returns IlTrue. (See the IlvBarChartDisplayer::computeItem method for more details.)
Implements IlvSingleChartDisplayer.
Reimplemented in Ilv3dBarChartDisplayer.
|
virtual |
Returns the clipping region that is used for the drawing.
This method returns in area the clipping region that is used to clip the graphical representation of data drawn by the current object. If a transformer t is specified, the returned clipping region is transformed by t. The current implementation of the method returns in area the area obtained by the IlvSingleChartDisplayer::getClipArea method expanded along the base by the size of a bar (obtained by the IlvBarChartDisplayer::getSize method). The term base of a chart refers to the abscissa scale of this chart.
| area | The returned clipping region that is used by the current object for the drawing. |
| t | The transformer that is applied to the returned clipping region. |
Reimplemented from IlvSingleChartDisplayer.
Reimplemented in Ilv3dBarChartDisplayer.
|
protectedvirtual |
Returns the maximum number of points needed to define an item for the current displayer.
See the IlvBarChartDisplayer::computeItem method for more details.
| dspPts | The object that stores the points in screen coordinates to be displayed by the current displayer. |
5. Reimplemented from IlvSingleChartDisplayer.
Reimplemented in Ilv3dBarChartDisplayer.
| IlvDim IlvBarChartDisplayer::getSize | ( | ) | const |
Returns the size of the bars used to represent the data.
|
virtual |
Returns the size along the base for the graphical representation of a given data point.
See the IlvSingleChartDisplayer::getSizeAlongBase() method for more details.
IlvBarChartDisplayer::getSize() method. Reimplemented from IlvSingleChartDisplayer.
| IlUInt IlvBarChartDisplayer::getStrokeThreshold | ( | ) | const |
Returns the minimum width of a bar, below which the stroke of a rendering style is not used.
The default value is 6.
|
virtual |
Returns the width of the bars used to represent the data.
Reimplemented in Ilv3dBarChartDisplayer.
| IlUInt IlvBarChartDisplayer::getWidthPercent | ( | ) | const |
Returns the width percentage of the bars used to represent the data.
|
virtual |
Indicates whether the graphical representation is filled.
This method indicates whether the graphical representation is filled. A graphical representation is filled for a given data point if it is not only located around this data point but also if it extends towards the origin. This is the case for displayers representing data with bars. A bar begins at the data point position and is drawn to the abscissa scale in Cartesian charts and to the center of the data display area in polar charts.
IlTrue by default. Reimplemented from IlvAbstractChartDisplayer.
| void IlvBarChartDisplayer::setStrokeThreshold | ( | IlUInt | threshold | ) |
Specifies the minimum width of a bar, below which the stroke of a rendering style is not used.
| threshold | The new threshold in pixel. Bars with a width smaller than this threshold will not be rendered with a stroke, unless they are not filled. |
|
virtual |
Sets the width of the bars used to represent the data.
| width | The new width of the bars used to represent the data. |
Reimplemented in Ilv3dBarChartDisplayer.
| void IlvBarChartDisplayer::setWidthPercent | ( | IlUInt | width | ) |
Sets the width percentage of the space between two bars.
The bars width will be computed as a percentage of the available space between two abscissa points. Therefore, the bars width will grow along if the chart is enlarged.
| width | The width percentage, between 0 and 100. |
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