jfreechart example source code file (SpiderWebPlot.java)
The jfreechart SpiderWebPlot.java source code/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------------
* SpiderWebPlot.java
* ------------------
* (C) Copyright 2005-2008, by Heaps of Flavour Pty Ltd and Contributors.
*
* Company Info: http://www.i4-talent.com
*
* Original Author: Don Elliott;
* Contributor(s): David Gilbert (for Object Refinery Limited);
* Nina Jeliazkova;
*
* Changes
* -------
* 28-Jan-2005 : First cut - missing a few features - still to do:
* - needs tooltips/URL/label generator functions
* - ticks on axes / background grid?
* 31-Jan-2005 : Renamed SpiderWebPlot, added label generator support, and
* reformatted for consistency with other source files in
* JFreeChart (DG);
* 20-Apr-2005 : Renamed CategoryLabelGenerator
* --> CategoryItemLabelGenerator (DG);
* 05-May-2005 : Updated draw() method parameters (DG);
* 10-Jun-2005 : Added equals() method and fixed serialization (DG);
* 16-Jun-2005 : Added default constructor and get/setDataset()
* methods (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 05-Apr-2006 : Fixed bug preventing the display of zero values - see patch
* 1462727 (DG);
* 05-Apr-2006 : Added support for mouse clicks, tool tips and URLs - see patch
* 1463455 (DG);
* 01-Jun-2006 : Fix bug 1493199, NullPointerException when drawing with null
* info (DG);
* 05-Feb-2007 : Added attributes for axis stroke and paint, while fixing
* bug 1651277, and implemented clone() properly (DG);
* 06-Feb-2007 : Changed getPlotValue() to protected, as suggested in bug
* 1605202 (DG);
* 05-Mar-2007 : Restore clip region correctly (see bug 1667750) (DG);
* 18-May-2007 : Set dataset for LegendItem (DG);
* 02-Jun-2008 : Fixed bug with chart entities using TableOrder.BY_COLUMN (DG);
* 02-Jun-2008 : Fixed bug with null dataset (DG);
*
*/
package org.jfree.chart.plot;
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.awt.geom.Arc2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Iterator;
import java.util.List;
import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.entity.CategoryItemEntity;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.PlotChangeEvent;
import org.jfree.chart.labels.CategoryItemLabelGenerator;
import org.jfree.chart.labels.CategoryToolTipGenerator;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.urls.CategoryURLGenerator;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintList;
import org.jfree.util.PaintUtilities;
import org.jfree.util.Rotation;
import org.jfree.util.ShapeUtilities;
import org.jfree.util.StrokeList;
import org.jfree.util.TableOrder;
/**
* A plot that displays data from a {@link CategoryDataset} in the form of a
* "spider web". Multiple series can be plotted on the same axis to allow
* easy comparison. This plot doesn't support negative values at present.
*/
public class SpiderWebPlot extends Plot implements Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = -5376340422031599463L;
/** The default head radius percent (currently 1%). */
public static final double DEFAULT_HEAD = 0.01;
/** The default axis label gap (currently 10%). */
public static final double DEFAULT_AXIS_LABEL_GAP = 0.10;
/** The default interior gap. */
public static final double DEFAULT_INTERIOR_GAP = 0.25;
/** The maximum interior gap (currently 40%). */
public static final double MAX_INTERIOR_GAP = 0.40;
/** The default starting angle for the radar chart axes. */
public static final double DEFAULT_START_ANGLE = 90.0;
/** The default series label font. */
public static final Font DEFAULT_LABEL_FONT = new Font("SansSerif",
Font.PLAIN, 10);
/** The default series label paint. */
public static final Paint DEFAULT_LABEL_PAINT = Color.black;
/** The default series label background paint. */
public static final Paint DEFAULT_LABEL_BACKGROUND_PAINT
= new Color(255, 255, 192);
/** The default series label outline paint. */
public static final Paint DEFAULT_LABEL_OUTLINE_PAINT = Color.black;
/** The default series label outline stroke. */
public static final Stroke DEFAULT_LABEL_OUTLINE_STROKE
= new BasicStroke(0.5f);
/** The default series label shadow paint. */
public static final Paint DEFAULT_LABEL_SHADOW_PAINT = Color.lightGray;
/**
* The default maximum value plotted - forces the plot to evaluate
* the maximum from the data passed in
*/
public static final double DEFAULT_MAX_VALUE = -1.0;
/** The head radius as a percentage of the available drawing area. */
protected double headPercent;
/** The space left around the outside of the plot as a percentage. */
private double interiorGap;
/** The gap between the labels and the axes as a %age of the radius. */
private double axisLabelGap;
/**
* The paint used to draw the axis lines.
*
* @since 1.0.4
*/
private transient Paint axisLinePaint;
/**
* The stroke used to draw the axis lines.
*
* @since 1.0.4
*/
private transient Stroke axisLineStroke;
/** The dataset. */
private CategoryDataset dataset;
/** The maximum value we are plotting against on each category axis */
private double maxValue;
/**
* The data extract order (BY_ROW or BY_COLUMN). This denotes whether
* the data series are stored in rows (in which case the category names are
* derived from the column keys) or in columns (in which case the category
* names are derived from the row keys).
*/
private TableOrder dataExtractOrder;
/** The starting angle. */
private double startAngle;
/** The direction for drawing the radar axis & plots. */
private Rotation direction;
/** The legend item shape. */
private transient Shape legendItemShape;
/** The paint for ALL series (overrides list). */
private transient Paint seriesPaint;
/** The series paint list. */
private PaintList seriesPaintList;
/** The base series paint (fallback). */
private transient Paint baseSeriesPaint;
/** The outline paint for ALL series (overrides list). */
private transient Paint seriesOutlinePaint;
/** The series outline paint list. */
private PaintList seriesOutlinePaintList;
/** The base series outline paint (fallback). */
private transient Paint baseSeriesOutlinePaint;
/** The outline stroke for ALL series (overrides list). */
private transient Stroke seriesOutlineStroke;
/** The series outline stroke list. */
private StrokeList seriesOutlineStrokeList;
/** The base series outline stroke (fallback). */
private transient Stroke baseSeriesOutlineStroke;
/** The font used to display the category labels. */
private Font labelFont;
/** The color used to draw the category labels. */
private transient Paint labelPaint;
/** The label generator. */
private CategoryItemLabelGenerator labelGenerator;
/** controls if the web polygons are filled or not */
private boolean webFilled = true;
/** A tooltip generator for the plot (<code>null permitted). */
private CategoryToolTipGenerator toolTipGenerator;
/** A URL generator for the plot (<code>null permitted). */
private CategoryURLGenerator urlGenerator;
/**
* Creates a default plot with no dataset.
*/
public SpiderWebPlot() {
this(null);
}
/**
* Creates a new spider web plot with the given dataset, with each row
* representing a series.
*
* @param dataset the dataset (<code>null permitted).
*/
public SpiderWebPlot(CategoryDataset dataset) {
this(dataset, TableOrder.BY_ROW);
}
/**
* Creates a new spider web plot with the given dataset.
*
* @param dataset the dataset.
* @param extract controls how data is extracted ({@link TableOrder#BY_ROW}
* or {@link TableOrder#BY_COLUMN}).
*/
public SpiderWebPlot(CategoryDataset dataset, TableOrder extract) {
super();
if (extract == null) {
throw new IllegalArgumentException("Null 'extract' argument.");
}
this.dataset = dataset;
if (dataset != null) {
dataset.addChangeListener(this);
}
this.dataExtractOrder = extract;
this.headPercent = DEFAULT_HEAD;
this.axisLabelGap = DEFAULT_AXIS_LABEL_GAP;
this.axisLinePaint = Color.black;
this.axisLineStroke = new BasicStroke(1.0f);
this.interiorGap = DEFAULT_INTERIOR_GAP;
this.startAngle = DEFAULT_START_ANGLE;
this.direction = Rotation.CLOCKWISE;
this.maxValue = DEFAULT_MAX_VALUE;
this.seriesPaint = null;
this.seriesPaintList = new PaintList();
this.baseSeriesPaint = null;
this.seriesOutlinePaint = null;
this.seriesOutlinePaintList = new PaintList();
this.baseSeriesOutlinePaint = DEFAULT_OUTLINE_PAINT;
this.seriesOutlineStroke = null;
this.seriesOutlineStrokeList = new StrokeList();
this.baseSeriesOutlineStroke = DEFAULT_OUTLINE_STROKE;
this.labelFont = DEFAULT_LABEL_FONT;
this.labelPaint = DEFAULT_LABEL_PAINT;
this.labelGenerator = new StandardCategoryItemLabelGenerator();
this.legendItemShape = DEFAULT_LEGEND_ITEM_CIRCLE;
}
/**
* Returns a short string describing the type of plot.
*
* @return The plot type.
*/
public String getPlotType() {
// return localizationResources.getString("Radar_Plot");
return ("Spider Web Plot");
}
/**
* Returns the dataset.
*
* @return The dataset (possibly <code>null).
*
* @see #setDataset(CategoryDataset)
*/
public CategoryDataset getDataset() {
return this.dataset;
}
/**
* Sets the dataset used by the plot and sends a {@link PlotChangeEvent}
* to all registered listeners.
*
* @param dataset the dataset (<code>null permitted).
*
* @see #getDataset()
*/
public void setDataset(CategoryDataset dataset) {
// if there is an existing dataset, remove the plot from the list of
// change listeners...
if (this.dataset != null) {
this.dataset.removeChangeListener(this);
}
// set the new dataset, and register the chart as a change listener...
this.dataset = dataset;
if (dataset != null) {
setDatasetGroup(dataset.getGroup());
dataset.addChangeListener(this);
}
// send a dataset change event to self to trigger plot change event
datasetChanged(new DatasetChangeEvent(this, dataset));
}
/**
* Method to determine if the web chart is to be filled.
*
* @return A boolean.
*
* @see #setWebFilled(boolean)
*/
public boolean isWebFilled() {
return this.webFilled;
}
/**
* Sets the webFilled flag and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param flag the flag.
*
* @see #isWebFilled()
*/
public void setWebFilled(boolean flag) {
this.webFilled = flag;
fireChangeEvent();
}
/**
* Returns the data extract order (by row or by column).
*
* @return The data extract order (never <code>null).
*
* @see #setDataExtractOrder(TableOrder)
*/
public TableOrder getDataExtractOrder() {
return this.dataExtractOrder;
}
/**
* Sets the data extract order (by row or by column) and sends a
* {@link PlotChangeEvent}to all registered listeners.
*
* @param order the order (<code>null not permitted).
*
* @throws IllegalArgumentException if <code>order is
* <code>null.
*
* @see #getDataExtractOrder()
*/
public void setDataExtractOrder(TableOrder order) {
if (order == null) {
throw new IllegalArgumentException("Null 'order' argument");
}
this.dataExtractOrder = order;
fireChangeEvent();
}
/**
* Returns the head percent.
*
* @return The head percent.
*
* @see #setHeadPercent(double)
*/
public double getHeadPercent() {
return this.headPercent;
}
/**
* Sets the head percent and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param percent the percent.
*
* @see #getHeadPercent()
*/
public void setHeadPercent(double percent) {
this.headPercent = percent;
fireChangeEvent();
}
/**
* Returns the start angle for the first radar axis.
* <BR>
* This is measured in degrees starting from 3 o'clock (Java Arc2D default)
* and measuring anti-clockwise.
*
* @return The start angle.
*
* @see #setStartAngle(double)
*/
public double getStartAngle() {
return this.startAngle;
}
/**
* Sets the starting angle and sends a {@link PlotChangeEvent} to all
* registered listeners.
* <P>
* The initial default value is 90 degrees, which corresponds to 12 o'clock.
* A value of zero corresponds to 3 o'clock... this is the encoding used by
* Java's Arc2D class.
*
* @param angle the angle (in degrees).
*
* @see #getStartAngle()
*/
public void setStartAngle(double angle) {
this.startAngle = angle;
fireChangeEvent();
}
/**
* Returns the maximum value any category axis can take.
*
* @return The maximum value.
*
* @see #setMaxValue(double)
*/
public double getMaxValue() {
return this.maxValue;
}
/**
* Sets the maximum value any category axis can take and sends
* a {@link PlotChangeEvent} to all registered listeners.
*
* @param value the maximum value.
*
* @see #getMaxValue()
*/
public void setMaxValue(double value) {
this.maxValue = value;
fireChangeEvent();
}
/**
* Returns the direction in which the radar axes are drawn
* (clockwise or anti-clockwise).
*
* @return The direction (never <code>null).
*
* @see #setDirection(Rotation)
*/
public Rotation getDirection() {
return this.direction;
}
/**
* Sets the direction in which the radar axes are drawn and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param direction the direction (<code>null not permitted).
*
* @see #getDirection()
*/
public void setDirection(Rotation direction) {
if (direction == null) {
throw new IllegalArgumentException("Null 'direction' argument.");
}
this.direction = direction;
fireChangeEvent();
}
/**
* Returns the interior gap, measured as a percentage of the available
* drawing space.
*
* @return The gap (as a percentage of the available drawing space).
*
* @see #setInteriorGap(double)
*/
public double getInteriorGap() {
return this.interiorGap;
}
/**
* Sets the interior gap and sends a {@link PlotChangeEvent} to all
* registered listeners. This controls the space between the edges of the
* plot and the plot area itself (the region where the axis labels appear).
*
* @param percent the gap (as a percentage of the available drawing space).
*
* @see #getInteriorGap()
*/
public void setInteriorGap(double percent) {
if ((percent < 0.0) || (percent > MAX_INTERIOR_GAP)) {
throw new IllegalArgumentException(
"Percentage outside valid range.");
}
if (this.interiorGap != percent) {
this.interiorGap = percent;
fireChangeEvent();
}
}
/**
* Returns the axis label gap.
*
* @return The axis label gap.
*
* @see #setAxisLabelGap(double)
*/
public double getAxisLabelGap() {
return this.axisLabelGap;
}
/**
* Sets the axis label gap and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param gap the gap.
*
* @see #getAxisLabelGap()
*/
public void setAxisLabelGap(double gap) {
this.axisLabelGap = gap;
fireChangeEvent();
}
/**
* Returns the paint used to draw the axis lines.
*
* @return The paint used to draw the axis lines (never <code>null).
*
* @see #setAxisLinePaint(Paint)
* @see #getAxisLineStroke()
* @since 1.0.4
*/
public Paint getAxisLinePaint() {
return this.axisLinePaint;
}
/**
* Sets the paint used to draw the axis lines and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param paint the paint (<code>null not permitted).
*
* @see #getAxisLinePaint()
* @since 1.0.4
*/
public void setAxisLinePaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.axisLinePaint = paint;
fireChangeEvent();
}
/**
* Returns the stroke used to draw the axis lines.
*
* @return The stroke used to draw the axis lines (never <code>null).
*
* @see #setAxisLineStroke(Stroke)
* @see #getAxisLinePaint()
* @since 1.0.4
*/
public Stroke getAxisLineStroke() {
return this.axisLineStroke;
}
/**
* Sets the stroke used to draw the axis lines and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param stroke the stroke (<code>null not permitted).
*
* @see #getAxisLineStroke()
* @since 1.0.4
*/
public void setAxisLineStroke(Stroke stroke) {
if (stroke == null) {
throw new IllegalArgumentException("Null 'stroke' argument.");
}
this.axisLineStroke = stroke;
fireChangeEvent();
}
//// SERIES PAINT /////////////////////////
/**
* Returns the paint for ALL series in the plot.
*
* @return The paint (possibly <code>null).
*
* @see #setSeriesPaint(Paint)
*/
public Paint getSeriesPaint() {
return this.seriesPaint;
}
/**
* Sets the paint for ALL series in the plot. If this is set to</code> null
* </code>, then a list of paints is used instead (to allow different colors
* to be used for each series of the radar group).
*
* @param paint the paint (<code>null permitted).
*
* @see #getSeriesPaint()
*/
public void setSeriesPaint(Paint paint) {
this.seriesPaint = paint;
fireChangeEvent();
}
/**
* Returns the paint for the specified series.
*
* @param series the series index (zero-based).
*
* @return The paint (never <code>null).
*
* @see #setSeriesPaint(int, Paint)
*/
public Paint getSeriesPaint(int series) {
// return the override, if there is one...
if (this.seriesPaint != null) {
return this.seriesPaint;
}
// otherwise look up the paint list
Paint result = this.seriesPaintList.getPaint(series);
if (result == null) {
DrawingSupplier supplier = getDrawingSupplier();
if (supplier != null) {
Paint p = supplier.getNextPaint();
this.seriesPaintList.setPaint(series, p);
result = p;
}
else {
result = this.baseSeriesPaint;
}
}
return result;
}
/**
* Sets the paint used to fill a series of the radar and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param series the series index (zero-based).
* @param paint the paint (<code>null permitted).
*
* @see #getSeriesPaint(int)
*/
public void setSeriesPaint(int series, Paint paint) {
this.seriesPaintList.setPaint(series, paint);
fireChangeEvent();
}
/**
* Returns the base series paint. This is used when no other paint is
* available.
*
* @return The paint (never <code>null).
*
* @see #setBaseSeriesPaint(Paint)
*/
public Paint getBaseSeriesPaint() {
return this.baseSeriesPaint;
}
/**
* Sets the base series paint.
*
* @param paint the paint (<code>null not permitted).
*
* @see #getBaseSeriesPaint()
*/
public void setBaseSeriesPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.baseSeriesPaint = paint;
fireChangeEvent();
}
//// SERIES OUTLINE PAINT ////////////////////////////
/**
* Returns the outline paint for ALL series in the plot.
*
* @return The paint (possibly <code>null).
*/
public Paint getSeriesOutlinePaint() {
return this.seriesOutlinePaint;
}
/**
* Sets the outline paint for ALL series in the plot. If this is set to
* </code> null, then a list of paints is used instead (to allow
* different colors to be used for each series).
*
* @param paint the paint (<code>null permitted).
*/
public void setSeriesOutlinePaint(Paint paint) {
this.seriesOutlinePaint = paint;
fireChangeEvent();
}
/**
* Returns the paint for the specified series.
*
* @param series the series index (zero-based).
*
* @return The paint (never <code>null).
*/
public Paint getSeriesOutlinePaint(int series) {
// return the override, if there is one...
if (this.seriesOutlinePaint != null) {
return this.seriesOutlinePaint;
}
// otherwise look up the paint list
Paint result = this.seriesOutlinePaintList.getPaint(series);
if (result == null) {
result = this.baseSeriesOutlinePaint;
}
return result;
}
/**
* Sets the paint used to fill a series of the radar and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param series the series index (zero-based).
* @param paint the paint (<code>null permitted).
*/
public void setSeriesOutlinePaint(int series, Paint paint) {
this.seriesOutlinePaintList.setPaint(series, paint);
fireChangeEvent();
}
/**
* Returns the base series paint. This is used when no other paint is
* available.
*
* @return The paint (never <code>null).
*/
public Paint getBaseSeriesOutlinePaint() {
return this.baseSeriesOutlinePaint;
}
/**
* Sets the base series paint.
*
* @param paint the paint (<code>null not permitted).
*/
public void setBaseSeriesOutlinePaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.baseSeriesOutlinePaint = paint;
fireChangeEvent();
}
//// SERIES OUTLINE STROKE /////////////////////
/**
* Returns the outline stroke for ALL series in the plot.
*
* @return The stroke (possibly <code>null).
*/
public Stroke getSeriesOutlineStroke() {
return this.seriesOutlineStroke;
}
/**
* Sets the outline stroke for ALL series in the plot. If this is set to
* </code> null, then a list of paints is used instead (to allow
* different colors to be used for each series).
*
* @param stroke the stroke (<code>null permitted).
*/
public void setSeriesOutlineStroke(Stroke stroke) {
this.seriesOutlineStroke = stroke;
fireChangeEvent();
}
/**
* Returns the stroke for the specified series.
*
* @param series the series index (zero-based).
*
* @return The stroke (never <code>null).
*/
public Stroke getSeriesOutlineStroke(int series) {
// return the override, if there is one...
if (this.seriesOutlineStroke != null) {
return this.seriesOutlineStroke;
}
// otherwise look up the paint list
Stroke result = this.seriesOutlineStrokeList.getStroke(series);
if (result == null) {
result = this.baseSeriesOutlineStroke;
}
return result;
}
/**
* Sets the stroke used to fill a series of the radar and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param series the series index (zero-based).
* @param stroke the stroke (<code>null permitted).
*/
public void setSeriesOutlineStroke(int series, Stroke stroke) {
this.seriesOutlineStrokeList.setStroke(series, stroke);
fireChangeEvent();
}
/**
* Returns the base series stroke. This is used when no other stroke is
* available.
*
* @return The stroke (never <code>null).
*/
public Stroke getBaseSeriesOutlineStroke() {
return this.baseSeriesOutlineStroke;
}
/**
* Sets the base series stroke.
*
* @param stroke the stroke (<code>null not permitted).
*/
public void setBaseSeriesOutlineStroke(Stroke stroke) {
if (stroke == null) {
throw new IllegalArgumentException("Null 'stroke' argument.");
}
this.baseSeriesOutlineStroke = stroke;
fireChangeEvent();
}
/**
* Returns the shape used for legend items.
*
* @return The shape (never <code>null).
*
* @see #setLegendItemShape(Shape)
*/
public Shape getLegendItemShape() {
return this.legendItemShape;
}
/**
* Sets the shape used for legend items and sends a {@link PlotChangeEvent}
* to all registered listeners.
*
* @param shape the shape (<code>null not permitted).
*
* @see #getLegendItemShape()
*/
public void setLegendItemShape(Shape shape) {
if (shape == null) {
throw new IllegalArgumentException("Null 'shape' argument.");
}
this.legendItemShape = shape;
fireChangeEvent();
}
/**
* Returns the series label font.
*
* @return The font (never <code>null).
*
* @see #setLabelFont(Font)
*/
public Font getLabelFont() {
return this.labelFont;
}
/**
* Sets the series label font and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param font the font (<code>null not permitted).
*
* @see #getLabelFont()
*/
public void setLabelFont(Font font) {
if (font == null) {
throw new IllegalArgumentException("Null 'font' argument.");
}
this.labelFont = font;
fireChangeEvent();
}
/**
* Returns the series label paint.
*
* @return The paint (never <code>null).
*
* @see #setLabelPaint(Paint)
*/
public Paint getLabelPaint() {
return this.labelPaint;
}
/**
* Sets the series label paint and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param paint the paint (<code>null not permitted).
*
* @see #getLabelPaint()
*/
public void setLabelPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.labelPaint = paint;
fireChangeEvent();
}
/**
* Returns the label generator.
*
* @return The label generator (never <code>null).
*
* @see #setLabelGenerator(CategoryItemLabelGenerator)
*/
public CategoryItemLabelGenerator getLabelGenerator() {
return this.labelGenerator;
}
/**
* Sets the label generator and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param generator the generator (<code>null not permitted).
*
* @see #getLabelGenerator()
*/
public void setLabelGenerator(CategoryItemLabelGenerator generator) {
if (generator == null) {
throw new IllegalArgumentException("Null 'generator' argument.");
}
this.labelGenerator = generator;
}
/**
* Returns the tool tip generator for the plot.
*
* @return The tool tip generator (possibly <code>null).
*
* @see #setToolTipGenerator(CategoryToolTipGenerator)
*
* @since 1.0.2
*/
public CategoryToolTipGenerator getToolTipGenerator() {
return this.toolTipGenerator;
}
/**
* Sets the tool tip generator for the plot and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param generator the generator (<code>null permitted).
*
* @see #getToolTipGenerator()
*
* @since 1.0.2
*/
public void setToolTipGenerator(CategoryToolTipGenerator generator) {
this.toolTipGenerator = generator;
fireChangeEvent();
}
/**
* Returns the URL generator for the plot.
*
* @return The URL generator (possibly <code>null).
*
* @see #setURLGenerator(CategoryURLGenerator)
*
* @since 1.0.2
*/
public CategoryURLGenerator getURLGenerator() {
return this.urlGenerator;
}
/**
* Sets the URL generator for the plot and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param generator the generator (<code>null permitted).
*
* @see #getURLGenerator()
*
* @since 1.0.2
*/
public void setURLGenerator(CategoryURLGenerator generator) {
this.urlGenerator = generator;
fireChangeEvent();
}
/**
* Returns a collection of legend items for the radar chart.
*
* @return The legend items.
*/
public LegendItemCollection getLegendItems() {
LegendItemCollection result = new LegendItemCollection();
if (getDataset() == null) {
return result;
}
List keys = null;
if (this.dataExtractOrder == TableOrder.BY_ROW) {
keys = this.dataset.getRowKeys();
}
else if (this.dataExtractOrder == TableOrder.BY_COLUMN) {
keys = this.dataset.getColumnKeys();
}
if (keys != null) {
int series = 0;
Iterator iterator = keys.iterator();
Shape shape = getLegendItemShape();
while (iterator.hasNext()) {
String label = iterator.next().toString();
String description = label;
Paint paint = getSeriesPaint(series);
Paint outlinePaint = getSeriesOutlinePaint(series);
Stroke stroke = getSeriesOutlineStroke(series);
LegendItem item = new LegendItem(label, description,
null, null, shape, paint, stroke, outlinePaint);
item.setDataset(getDataset());
result.add(item);
series++;
}
}
return result;
}
/**
* Returns a cartesian point from a polar angle, length and bounding box
*
* @param bounds the area inside which the point needs to be.
* @param angle the polar angle, in degrees.
* @param length the relative length. Given in percent of maximum extend.
*
* @return The cartesian point.
*/
protected Point2D getWebPoint(Rectangle2D bounds,
double angle, double length) {
double angrad = Math.toRadians(angle);
double x = Math.cos(angrad) * length * bounds.getWidth() / 2;
double y = -Math.sin(angrad) * length * bounds.getHeight() / 2;
return new Point2D.Double(bounds.getX() + x + bounds.getWidth() / 2,
bounds.getY() + y + bounds.getHeight() / 2);
}
/**
* Draws the plot on a Java 2D graphics device (such as the screen or a
* printer).
*
* @param g2 the graphics device.
* @param area the area within which the plot should be drawn.
* @param anchor the anchor point (<code>null permitted).
* @param parentState the state from the parent plot, if there is one.
* @param info collects info about the drawing.
*/
public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor,
PlotState parentState, PlotRenderingInfo info) {
// adjust for insets...
RectangleInsets insets = getInsets();
insets.trim(area);
if (info != null) {
info.setPlotArea(area);
info.setDataArea(area);
}
drawBackground(g2, area);
drawOutline(g2, area);
Shape savedClip = g2.getClip();
g2.clip(area);
Composite originalComposite = g2.getComposite();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
getForegroundAlpha()));
if (!DatasetUtilities.isEmptyOrNull(this.dataset)) {
int seriesCount = 0, catCount = 0;
if (this.dataExtractOrder == TableOrder.BY_ROW) {
seriesCount = this.dataset.getRowCount();
catCount = this.dataset.getColumnCount();
}
else {
seriesCount = this.dataset.getColumnCount();
catCount = this.dataset.getRowCount();
}
// ensure we have a maximum value to use on the axes
if (this.maxValue == DEFAULT_MAX_VALUE)
calculateMaxValue(seriesCount, catCount);
// Next, setup the plot area
// adjust the plot area by the interior spacing value
double gapHorizontal = area.getWidth() * getInteriorGap();
double gapVertical = area.getHeight() * getInteriorGap();
double X = area.getX() + gapHorizontal / 2;
double Y = area.getY() + gapVertical / 2;
double W = area.getWidth() - gapHorizontal;
double H = area.getHeight() - gapVertical;
double headW = area.getWidth() * this.headPercent;
double headH = area.getHeight() * this.headPercent;
// make the chart area a square
double min = Math.min(W, H) / 2;
X = (X + X + W) / 2 - min;
Y = (Y + Y + H) / 2 - min;
W = 2 * min;
H = 2 * min;
Point2D centre = new Point2D.Double(X + W / 2, Y + H / 2);
Rectangle2D radarArea = new Rectangle2D.Double(X, Y, W, H);
// draw the axis and category label
for (int cat = 0; cat < catCount; cat++) {
double angle = getStartAngle()
+ (getDirection().getFactor() * cat * 360 / catCount);
Point2D endPoint = getWebPoint(radarArea, angle, 1);
// 1 = end of axis
Line2D line = new Line2D.Double(centre, endPoint);
g2.setPaint(this.axisLinePaint);
g2.setStroke(this.axisLineStroke);
g2.draw(line);
drawLabel(g2, radarArea, 0.0, cat, angle, 360.0 / catCount);
}
// Now actually plot each of the series polygons..
for (int series = 0; series < seriesCount; series++) {
drawRadarPoly(g2, radarArea, centre, info, series, catCount,
headH, headW);
}
}
else {
drawNoDataMessage(g2, area);
}
g2.setClip(savedClip);
g2.setComposite(originalComposite);
drawOutline(g2, area);
}
/**
* loop through each of the series to get the maximum value
* on each category axis
*
* @param seriesCount the number of series
* @param catCount the number of categories
*/
private void calculateMaxValue(int seriesCount, int catCount) {
double v = 0;
Number nV = null;
for (int seriesIndex = 0; seriesIndex < seriesCount; seriesIndex++) {
for (int catIndex = 0; catIndex < catCount; catIndex++) {
nV = getPlotValue(seriesIndex, catIndex);
if (nV != null) {
v = nV.doubleValue();
if (v > this.maxValue) {
this.maxValue = v;
}
}
}
}
}
/**
* Draws a radar plot polygon.
*
* @param g2 the graphics device.
* @param plotArea the area we are plotting in (already adjusted).
* @param centre the centre point of the radar axes
* @param info chart rendering info.
* @param series the series within the dataset we are plotting
* @param catCount the number of categories per radar plot
* @param headH the data point height
* @param headW the data point width
*/
protected void drawRadarPoly(Graphics2D g2,
Rectangle2D plotArea,
Point2D centre,
PlotRenderingInfo info,
int series, int catCount,
double headH, double headW) {
Polygon polygon = new Polygon();
EntityCollection entities = null;
if (info != null) {
entities = info.getOwner().getEntityCollection();
}
// plot the data...
for (int cat = 0; cat < catCount; cat++) {
Number dataValue = getPlotValue(series, cat);
if (dataValue != null) {
double value = dataValue.doubleValue();
if (value >= 0) { // draw the polygon series...
// Finds our starting angle from the centre for this axis
double angle = getStartAngle()
+ (getDirection().getFactor() * cat * 360 / catCount);
// The following angle calc will ensure there isn't a top
// vertical axis - this may be useful if you don't want any
// given criteria to 'appear' move important than the
// others..
// + (getDirection().getFactor()
// * (cat + 0.5) * 360 / catCount);
// find the point at the appropriate distance end point
// along the axis/angle identified above and add it to the
// polygon
Point2D point = getWebPoint(plotArea, angle,
value / this.maxValue);
polygon.addPoint((int) point.getX(), (int) point.getY());
// put an elipse at the point being plotted..
Paint paint = getSeriesPaint(series);
Paint outlinePaint = getSeriesOutlinePaint(series);
Stroke outlineStroke = getSeriesOutlineStroke(series);
Ellipse2D head = new Ellipse2D.Double(point.getX()
- headW / 2, point.getY() - headH / 2, headW,
headH);
g2.setPaint(paint);
g2.fill(head);
g2.setStroke(outlineStroke);
g2.setPaint(outlinePaint);
g2.draw(head);
if (entities != null) {
int row = 0; int col = 0;
if (this.dataExtractOrder == TableOrder.BY_ROW) {
row = series;
col = cat;
}
else {
row = cat;
col = series;
}
String tip = null;
if (this.toolTipGenerator != null) {
tip = this.toolTipGenerator.generateToolTip(
this.dataset, row, col);
}
String url = null;
if (this.urlGenerator != null) {
url = this.urlGenerator.generateURL(this.dataset,
row, col);
}
Shape area = new Rectangle(
(int) (point.getX() - headW),
(int) (point.getY() - headH),
(int) (headW * 2), (int) (headH * 2));
CategoryItemEntity entity = new CategoryItemEntity(
area, tip, url, this.dataset,
this.dataset.getRowKey(row),
this.dataset.getColumnKey(col));
entities.add(entity);
}
}
}
}
// Plot the polygon
Paint paint = getSeriesPaint(series);
g2.setPaint(paint);
g2.setStroke(getSeriesOutlineStroke(series));
g2.draw(polygon);
// Lastly, fill the web polygon if this is required
if (this.webFilled) {
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
0.1f));
g2.fill(polygon);
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
getForegroundAlpha()));
}
}
/**
* Returns the value to be plotted at the interseries of the
* series and the category. This allows us to plot
* <code>BY_ROW or
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