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Rogue Wave Views Charts Package API Reference Guide |
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Rogue Wave Views Charts Package API Reference Guide |
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Class for high-low bar displayers. More...
#include <ilviews/charts/hilo.h>
Public Member Functions | |
| IlvHiLoBarChartDisplayer (IlvDim width=IlvChartDisplayerWidth, IlvPalette *risePalette=0, IlvPalette *fallPalette=0) | |
| Constructor. More... | |
 Public Member Functions inherited from IlvHiLoChartDisplayer | |
| IlvHiLoChartDisplayer (IlvDim width=IlvChartDisplayerWidth, IlvPalette *risePalette=0, IlvPalette *fallPalette=0) | |
| Constructor. More... | |
| virtual | ~IlvHiLoChartDisplayer () |
| Destructor. More... | |
| virtual void | getClipArea (IlvRect &area, const IlvTransformer *t) const |
| Returns the clipping region that is used for the drawing. More... | |
| IlvPalette * | getFallPalette () const |
| Returns the fall palette. 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 IlvChartDataPointInfo * | getPointInfo (IlUInt dataPointIndex, const IlvChartDataSet *dataSet=0) const |
| Returns the point information associated with a given data point. More... | |
| IlvPalette * | getRisePalette () const |
| Returns the rise palette. More... | |
| IlvDim | getSize () const |
| Returns the size of the high-low items. More... | |
| virtual IlvDim | getSizeAlongBase () const |
| Returns the size along the base for the graphical representation of a given data point. More... | |
| IlvDim | getWidth () const |
| Returns the width of the high-low items. More... | |
| IlUInt | getWidthPercent () const |
| Returns the width percentage of the high-low items. 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... | |
| void | setFallPalette (IlvPalette *pal) |
| Sets the fall palette. More... | |
| virtual void | setMode (IlvDrawMode mode) |
| Sets the drawing mode. More... | |
| virtual void | setOverwrite (IlBoolean o) |
| Sets the overwrite mode. More... | |
| void | setRisePalette (IlvPalette *pal) |
| Sets the rise palette. More... | |
| void | setWidth (IlvDim width) |
| Sets the width of the high-low items. More... | |
| void | setWidthPercent (IlUInt width) |
| Sets the width percentage of the high-low items. More... | |
| virtual IlBoolean | useVirtualDataSets () const |
| Indicates whether the current displayer uses virtual data sets. More... | |
| Public Member Functions inherited from IlvSingleChartDisplayer | |
| virtual | ~IlvSingleChartDisplayer () |
| Destructor. More... | |
| virtual IlvChartDisplayerPoints * | allocDisplayerPoints () const |
Allocates and returns an IlvChartDisplayerPoints object. More... | |
| virtual IlBoolean | boundingBox (IlvRect &bbox, const IlvTransformer *t=0) const |
| Returns the bounding box of the graphical representation of data. More... | |
| virtual IlBoolean | dataPointBBox (IlUInt dataPtIdx, IlvRect &bbox, IlBoolean takeInfoIntoAccount=IlTrue, const IlvTransformer *t=0) const |
| Returns the bounding box of the graphical representation of the data points at a given index. More... | |
| virtual void | draw (IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the graphical representation of data. More... | |
| virtual void | drawDataPoint (IlUInt dataPtIdx, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the graphical representation of the data point(s) at a given index. More... | |
| virtual void | drawDataPoints (IlUInt iMin, IlUInt iMax, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the graphical representation of the data points between a given interval. More... | |
| virtual void | drawFill (IlBoolean b) |
| Sets the filling mode of the displayer. More... | |
| virtual IlvColor * | getBackground (IlUInt index=0) const |
| Returns the background color of a palette used by the current displayer to display data. More... | |
| void | getDataDisplayArea (IlvRect &dataDisplayArea, const IlvTransformer *t=0) const |
| Returns the bounds of the data display area. More... | |
| IlvChartDisplayerPointsFactory * | getDisplayerPointsFactory () const |
Returns the factory used to create IlvChartDisplayerPoints instances. More... | |
| virtual IlUInt | getDisplayersCount () const |
| Returns the number of displayers. More... | |
| virtual IlUInt | getDisplayItem (IlvChartDataSet *&dataSet, const IlvPoint &viewPoint, const IlvTransformer *t) const |
| Returns the item to which a view point corresponds. More... | |
| virtual IlBoolean | getDisplayPoint (const IlvChartDataSet *dataSet, IlUInt dataPtIdx, IlvPoint &point, const IlvTransformer *t=0) const |
| Returns the corresponding screen point for a data point. More... | |
| virtual IlvColor * | getForeground (IlUInt index=0) const |
| Returns the foreground color of a palette used by the current displayer to display data. More... | |
| virtual const char * | getInternalLegendText (IlUInt index=0) const |
| Returns the legend text stored in the current displayer. More... | |
| virtual 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 | 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 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... | |
| 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... | |
Protected Member Functions | |
| virtual void | computeItem (const IlvChartDisplayerPoints *displayerPoints, IlUInt pointIndex, IlUInt &usedPointsCount, IlvPoint *points, const IlvTransformer *t=0) const |
| Computes the item that will be displayed for a given point in screen coordinates corresponding to a data point to display. More... | |
| virtual void | drawItem (const IlvChartDisplayerPoints *displayerPoints, IlUInt pointIndex, IlUInt pointCount, IlvPoint *points, IlvPalette *itemPalette, IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const |
| Draws the item for a given point in screen coordinates corresponding to a data point to display. More... | |
| virtual 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 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 IlvHiLoChartDisplayer | |
| virtual void | boundingBoxOfPoints (IlvChartDisplayerPoints *displayerPoints, IlvRect &bbox, IlBoolean takeInfoIntoAccount, 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 | 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 IlvDoublePoint * | selectDataPointsForPoint (IlUInt dataPointIndex, IlUInt &count, IlUInt *&dataPointIndexes) const |
| Selects and returns the data points needed to display the graphical representation of the data points at a given index in the real data set(s) to be displayed by the current displayer. More... | |
| virtual void | updateVirtualDataSets () |
| Updates the virtual data set. 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... | |
| 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 * | 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. | |
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 high-low bar displayers.
Library: ilvcharts
This class is a subclass of IlvHiLoChartDisplayer which allows you to represent data with high-low items that are shown as bars. A high-low item is made up of a bar linking a low value and a high value.
The high-low bar displayer (just as with the high-low displayer) displays two data sets. The first data set is composed of the low values and the second data set is composed of the high values.
A high-low item is drawn between each pair of low-high values, the low values being taken in order from the first data set and the high values being taken in order from the second data set. Two palettes are defined for this displayer: a rise palette and a fall palette. The rise palette is used to draw the high-low items for which the corresponding low value is smaller than the high value. The fall palette is used to draw the high-low items for which the corresponding low value is greater than the high value.
See the IlvHiLoChartDisplayer class, and particularly the Detailed Description, for more details about objects displaying high-low items.
The high-low bar displayer can be used with any type of projection. (See the IlvAbstractProjector class for more details.)
The following images show data sets represented with a high-low bar displayer in a Cartesian chart (on the left) and a polar chart (on the right). The rise palette has its foreground color set to green and the fall palette to red. The background color is set to white for both the rise palette and the fall palette.
IlvHiLoChartDisplayer. | IlvHiLoBarChartDisplayer::IlvHiLoBarChartDisplayer | ( | IlvDim | width = IlvChartDisplayerWidth, |
| IlvPalette * | risePalette = 0, |
||
| IlvPalette * | fallPalette = 0 |
||
| ) |
Constructor.
Initializes a new IlvHiLoBarChartDisplayer object.
| width | The width of the bars that will be drawn for the high-low items. |
| risePalette | The rise palette that will be used to draw the high-low items for which the corresponding low value is smaller than the high value. |
| fallPalette | The fall palette that will be used to draw the high-low items for which the corresponding low value is greater than the high value. |
|
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 to 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.)
The data points that are displayed are those of the virtual data set that is constructed internally from the two data sets that are set on the current displayer. (See the Detailed Description of the IlvHiLoChartDisplayer class for more details.) These data points are the alternated data points of the low-values and high-values data sets. Since two data points (one from the low-values data set and one from the high-values data set) are needed to draw a high-low item, the data points of the virtual data set are considered in pairs and the computeItem method will be called once for each pair of screen points corresponding to data points to display instead of once for each screen point.
The item that will be displayed for a given pair of screen points corresponding to a data point of the low values data set and a data point of the high-values data set, respectively, is a bar that links the pair of screen points and has the width returned by the getWidth() method. This bar is defined by five points (the last one being equal to the first one).
The number of points defining the item is returned in usedPointsCount.
drawPoints() method. Reimplemented from IlvHiLoChartDisplayer.
|
protectedvirtual |
Draws the item for a given point in screen coordinates corresponding to a data point to display.
Draws the item for the point in screen coordinates that is stored at the index pointIndex in the displayerPoints object. This object stores the points in screen coordinates corresponding to the data points that have to be displayed by the current displayer. (See the IlvSingleChartDisplayer::drawItem() method for more details.)
This method draws the high-low item defined by the points stored in points. A polyline is drawn between these points 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 IlvHiLoBarChartDisplayer::computeItem() method for more details.)
drawPoints() method. Reimplemented from IlvHiLoChartDisplayer.
|
protectedvirtual |
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 two bars side-by-side. These bars are bounded by the area legendArea. They are displayed with the fall and rise palettes respectively.
| 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. |
Reimplemented from IlvHiLoChartDisplayer.
|
protectedvirtual |
Returns the maximum number of points needed to define an item for the current displayer.
(See the IlvHiLoBarChartDisplayer::computeItem method for more details.)
| displayerPoints | The object that stores the points in screen coordinates to be displayed by the current displayer. |
5. Reimplemented from IlvHiLoChartDisplayer.
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