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jfreechart example source code file (PolarPlot.java)
This example jfreechart source code file (PolarPlot.java) is included in the DevDaily.com
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The jfreechart PolarPlot.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.]
*
* --------------
* PolarPlot.java
* --------------
* (C) Copyright 2004-2008, by Solution Engineering, Inc. and Contributors.
*
* Original Author: Daniel Bridenbecker, Solution Engineering, Inc.;
* Contributor(s): David Gilbert (for Object Refinery Limited);
* Martin Hoeller (patch 1871902);
*
* Changes
* -------
* 19-Jan-2004 : Version 1, contributed by DB with minor changes by DG (DG);
* 07-Apr-2004 : Changed text bounds calculation (DG);
* 05-May-2005 : Updated draw() method parameters (DG);
* 09-Jun-2005 : Fixed getDataRange() and equals() methods (DG);
* 25-Oct-2005 : Implemented Zoomable (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 07-Feb-2007 : Fixed bug 1599761, data value less than axis minimum (DG);
* 21-Mar-2007 : Fixed serialization bug (DG);
* 24-Sep-2007 : Implemented new zooming methods (DG);
* 17-Feb-2007 : Added angle tick unit attribute (see patch 1871902 by
* Martin Hoeller) (DG);
* 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
* Jess Thrysoee (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.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Point;
import java.awt.Shape;
import java.awt.Stroke;
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.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ResourceBundle;
import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.axis.AxisState;
import org.jfree.chart.axis.NumberTick;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.axis.TickUnit;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.event.PlotChangeEvent;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.event.RendererChangeListener;
import org.jfree.chart.renderer.PolarItemRenderer;
import org.jfree.chart.util.ResourceBundleWrapper;
import org.jfree.data.Range;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.data.xy.XYDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.text.TextUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
/**
* Plots data that is in (theta, radius) pairs where
* theta equal to zero is due north and increases clockwise.
*/
public class PolarPlot extends Plot implements ValueAxisPlot, Zoomable,
RendererChangeListener, Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 3794383185924179525L;
/** The default margin. */
private static final int MARGIN = 20;
/** The annotation margin. */
private static final double ANNOTATION_MARGIN = 7.0;
/**
* The default angle tick unit size.
*
* @since 1.0.10
*/
public static final double DEFAULT_ANGLE_TICK_UNIT_SIZE = 45.0;
/** The default grid line stroke. */
public static final Stroke DEFAULT_GRIDLINE_STROKE = new BasicStroke(
0.5f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL,
0.0f, new float[]{2.0f, 2.0f}, 0.0f);
/** The default grid line paint. */
public static final Paint DEFAULT_GRIDLINE_PAINT = Color.gray;
/** The resourceBundle for the localization. */
protected static ResourceBundle localizationResources
= ResourceBundleWrapper.getBundle(
"org.jfree.chart.plot.LocalizationBundle");
/** The angles that are marked with gridlines. */
private List angleTicks;
/** The axis (used for the y-values). */
private ValueAxis axis;
/** The dataset. */
private XYDataset dataset;
/**
* Object responsible for drawing the visual representation of each point
* on the plot.
*/
private PolarItemRenderer renderer;
/**
* The tick unit that controls the spacing between the angular grid lines.
*
* @since 1.0.10
*/
private TickUnit angleTickUnit;
/** A flag that controls whether or not the angle labels are visible. */
private boolean angleLabelsVisible = true;
/** The font used to display the angle labels - never null. */
private Font angleLabelFont = new Font("SansSerif", Font.PLAIN, 12);
/** The paint used to display the angle labels. */
private transient Paint angleLabelPaint = Color.black;
/** A flag that controls whether the angular grid-lines are visible. */
private boolean angleGridlinesVisible;
/** The stroke used to draw the angular grid-lines. */
private transient Stroke angleGridlineStroke;
/** The paint used to draw the angular grid-lines. */
private transient Paint angleGridlinePaint;
/** A flag that controls whether the radius grid-lines are visible. */
private boolean radiusGridlinesVisible;
/** The stroke used to draw the radius grid-lines. */
private transient Stroke radiusGridlineStroke;
/** The paint used to draw the radius grid-lines. */
private transient Paint radiusGridlinePaint;
/** The annotations for the plot. */
private List cornerTextItems = new ArrayList();
/**
* Default constructor.
*/
public PolarPlot() {
this(null, null, null);
}
/**
* Creates a new plot.
*
* @param dataset the dataset (<code>null permitted).
* @param radiusAxis the radius axis (<code>null permitted).
* @param renderer the renderer (<code>null permitted).
*/
public PolarPlot(XYDataset dataset,
ValueAxis radiusAxis,
PolarItemRenderer renderer) {
super();
this.dataset = dataset;
if (this.dataset != null) {
this.dataset.addChangeListener(this);
}
this.angleTickUnit = new NumberTickUnit(DEFAULT_ANGLE_TICK_UNIT_SIZE);
this.axis = radiusAxis;
if (this.axis != null) {
this.axis.setPlot(this);
this.axis.addChangeListener(this);
}
this.renderer = renderer;
if (this.renderer != null) {
this.renderer.setPlot(this);
this.renderer.addChangeListener(this);
}
this.angleGridlinesVisible = true;
this.angleGridlineStroke = DEFAULT_GRIDLINE_STROKE;
this.angleGridlinePaint = DEFAULT_GRIDLINE_PAINT;
this.radiusGridlinesVisible = true;
this.radiusGridlineStroke = DEFAULT_GRIDLINE_STROKE;
this.radiusGridlinePaint = DEFAULT_GRIDLINE_PAINT;
}
/**
* Add text to be displayed in the lower right hand corner and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param text the text to display (<code>null not permitted).
*
* @see #removeCornerTextItem(String)
*/
public void addCornerTextItem(String text) {
if (text == null) {
throw new IllegalArgumentException("Null 'text' argument.");
}
this.cornerTextItems.add(text);
fireChangeEvent();
}
/**
* Remove the given text from the list of corner text items and
* sends a {@link PlotChangeEvent} to all registered listeners.
*
* @param text the text to remove (<code>null ignored).
*
* @see #addCornerTextItem(String)
*/
public void removeCornerTextItem(String text) {
boolean removed = this.cornerTextItems.remove(text);
if (removed) {
fireChangeEvent();
}
}
/**
* Clear the list of corner text items and sends a {@link PlotChangeEvent}
* to all registered listeners.
*
* @see #addCornerTextItem(String)
* @see #removeCornerTextItem(String)
*/
public void clearCornerTextItems() {
if (this.cornerTextItems.size() > 0) {
this.cornerTextItems.clear();
fireChangeEvent();
}
}
/**
* Returns the plot type as a string.
*
* @return A short string describing the type of plot.
*/
public String getPlotType() {
return PolarPlot.localizationResources.getString("Polar_Plot");
}
/**
* Returns the axis for the plot.
*
* @return The radius axis (possibly <code>null).
*
* @see #setAxis(ValueAxis)
*/
public ValueAxis getAxis() {
return this.axis;
}
/**
* Sets the axis for the plot and sends a {@link PlotChangeEvent} to all
* registered listeners.
*
* @param axis the new axis (<code>null permitted).
*/
public void setAxis(ValueAxis axis) {
if (axis != null) {
axis.setPlot(this);
}
// plot is likely registered as a listener with the existing axis...
if (this.axis != null) {
this.axis.removeChangeListener(this);
}
this.axis = axis;
if (this.axis != null) {
this.axis.configure();
this.axis.addChangeListener(this);
}
fireChangeEvent();
}
/**
* Returns the primary dataset for the plot.
*
* @return The primary dataset (possibly <code>null).
*
* @see #setDataset(XYDataset)
*/
public XYDataset getDataset() {
return this.dataset;
}
/**
* Sets the dataset for the plot, replacing the existing dataset if there
* is one.
*
* @param dataset the dataset (<code>null permitted).
*
* @see #getDataset()
*/
public void setDataset(XYDataset dataset) {
// if there is an existing dataset, remove the plot from the list of
// change listeners...
XYDataset existing = this.dataset;
if (existing != null) {
existing.removeChangeListener(this);
}
// set the new m_Dataset, and register the chart as a change listener...
this.dataset = dataset;
if (this.dataset != null) {
setDatasetGroup(this.dataset.getGroup());
this.dataset.addChangeListener(this);
}
// send a m_Dataset change event to self...
DatasetChangeEvent event = new DatasetChangeEvent(this, this.dataset);
datasetChanged(event);
}
/**
* Returns the item renderer.
*
* @return The renderer (possibly <code>null).
*
* @see #setRenderer(PolarItemRenderer)
*/
public PolarItemRenderer getRenderer() {
return this.renderer;
}
/**
* Sets the item renderer, and notifies all listeners of a change to the
* plot.
* <P>
* If the renderer is set to <code>null, no chart will be drawn.
*
* @param renderer the new renderer (<code>null permitted).
*
* @see #getRenderer()
*/
public void setRenderer(PolarItemRenderer renderer) {
if (this.renderer != null) {
this.renderer.removeChangeListener(this);
}
this.renderer = renderer;
if (this.renderer != null) {
this.renderer.setPlot(this);
}
fireChangeEvent();
}
/**
* Returns the tick unit that controls the spacing of the angular grid
* lines.
*
* @return The tick unit (never <code>null).
*
* @since 1.0.10
*/
public TickUnit getAngleTickUnit() {
return this.angleTickUnit;
}
/**
* Sets the tick unit that controls the spacing of the angular grid
* lines, and sends a {@link PlotChangeEvent} to all registered listeners.
*
* @param unit the tick unit (<code>null not permitted).
*
* @since 1.0.10
*/
public void setAngleTickUnit(TickUnit unit) {
if (unit == null) {
throw new IllegalArgumentException("Null 'unit' argument.");
}
this.angleTickUnit = unit;
fireChangeEvent();
}
/**
* Returns a flag that controls whether or not the angle labels are visible.
*
* @return A boolean.
*
* @see #setAngleLabelsVisible(boolean)
*/
public boolean isAngleLabelsVisible() {
return this.angleLabelsVisible;
}
/**
* Sets the flag that controls whether or not the angle labels are visible,
* and sends a {@link PlotChangeEvent} to all registered listeners.
*
* @param visible the flag.
*
* @see #isAngleLabelsVisible()
*/
public void setAngleLabelsVisible(boolean visible) {
if (this.angleLabelsVisible != visible) {
this.angleLabelsVisible = visible;
fireChangeEvent();
}
}
/**
* Returns the font used to display the angle labels.
*
* @return A font (never <code>null).
*
* @see #setAngleLabelFont(Font)
*/
public Font getAngleLabelFont() {
return this.angleLabelFont;
}
/**
* Sets the font used to display the angle labels and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param font the font (<code>null not permitted).
*
* @see #getAngleLabelFont()
*/
public void setAngleLabelFont(Font font) {
if (font == null) {
throw new IllegalArgumentException("Null 'font' argument.");
}
this.angleLabelFont = font;
fireChangeEvent();
}
/**
* Returns the paint used to display the angle labels.
*
* @return A paint (never <code>null).
*
* @see #setAngleLabelPaint(Paint)
*/
public Paint getAngleLabelPaint() {
return this.angleLabelPaint;
}
/**
* Sets the paint used to display the angle labels and sends a
* {@link PlotChangeEvent} to all registered listeners.
*
* @param paint the paint (<code>null not permitted).
*/
public void setAngleLabelPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.angleLabelPaint = paint;
fireChangeEvent();
}
/**
* Returns <code>true if the angular gridlines are visible, and
* <code>false otherwise.
*
* @return <code>true or false.
*
* @see #setAngleGridlinesVisible(boolean)
*/
public boolean isAngleGridlinesVisible() {
return this.angleGridlinesVisible;
}
/**
* Sets the flag that controls whether or not the angular grid-lines are
* visible.
* <p>
* If the flag value is changed, a {@link PlotChangeEvent} is sent to all
* registered listeners.
*
* @param visible the new value of the flag.
*
* @see #isAngleGridlinesVisible()
*/
public void setAngleGridlinesVisible(boolean visible) {
if (this.angleGridlinesVisible != visible) {
this.angleGridlinesVisible = visible;
fireChangeEvent();
}
}
/**
* Returns the stroke for the grid-lines (if any) plotted against the
* angular axis.
*
* @return The stroke (possibly <code>null).
*
* @see #setAngleGridlineStroke(Stroke)
*/
public Stroke getAngleGridlineStroke() {
return this.angleGridlineStroke;
}
/**
* Sets the stroke for the grid lines plotted against the angular axis and
* sends a {@link PlotChangeEvent} to all registered listeners.
* <p>
* If you set this to <code>null, no grid lines will be drawn.
*
* @param stroke the stroke (<code>null permitted).
*
* @see #getAngleGridlineStroke()
*/
public void setAngleGridlineStroke(Stroke stroke) {
this.angleGridlineStroke = stroke;
fireChangeEvent();
}
/**
* Returns the paint for the grid lines (if any) plotted against the
* angular axis.
*
* @return The paint (possibly <code>null).
*
* @see #setAngleGridlinePaint(Paint)
*/
public Paint getAngleGridlinePaint() {
return this.angleGridlinePaint;
}
/**
* Sets the paint for the grid lines plotted against the angular axis.
* <p>
* If you set this to <code>null, no grid lines will be drawn.
*
* @param paint the paint (<code>null permitted).
*
* @see #getAngleGridlinePaint()
*/
public void setAngleGridlinePaint(Paint paint) {
this.angleGridlinePaint = paint;
fireChangeEvent();
}
/**
* Returns <code>true if the radius axis grid is visible, and
* <code>false otherwise.
*
* @return <code>true or false.
*
* @see #setRadiusGridlinesVisible(boolean)
*/
public boolean isRadiusGridlinesVisible() {
return this.radiusGridlinesVisible;
}
/**
* Sets the flag that controls whether or not the radius axis grid lines
* are visible.
* <p>
* If the flag value is changed, a {@link PlotChangeEvent} is sent to all
* registered listeners.
*
* @param visible the new value of the flag.
*
* @see #isRadiusGridlinesVisible()
*/
public void setRadiusGridlinesVisible(boolean visible) {
if (this.radiusGridlinesVisible != visible) {
this.radiusGridlinesVisible = visible;
fireChangeEvent();
}
}
/**
* Returns the stroke for the grid lines (if any) plotted against the
* radius axis.
*
* @return The stroke (possibly <code>null).
*
* @see #setRadiusGridlineStroke(Stroke)
*/
public Stroke getRadiusGridlineStroke() {
return this.radiusGridlineStroke;
}
/**
* Sets the stroke for the grid lines plotted against the radius axis and
* sends a {@link PlotChangeEvent} to all registered listeners.
* <p>
* If you set this to <code>null, no grid lines will be drawn.
*
* @param stroke the stroke (<code>null permitted).
*
* @see #getRadiusGridlineStroke()
*/
public void setRadiusGridlineStroke(Stroke stroke) {
this.radiusGridlineStroke = stroke;
fireChangeEvent();
}
/**
* Returns the paint for the grid lines (if any) plotted against the radius
* axis.
*
* @return The paint (possibly <code>null).
*
* @see #setRadiusGridlinePaint(Paint)
*/
public Paint getRadiusGridlinePaint() {
return this.radiusGridlinePaint;
}
/**
* Sets the paint for the grid lines plotted against the radius axis and
* sends a {@link PlotChangeEvent} to all registered listeners.
* <p>
* If you set this to <code>null, no grid lines will be drawn.
*
* @param paint the paint (<code>null permitted).
*
* @see #getRadiusGridlinePaint()
*/
public void setRadiusGridlinePaint(Paint paint) {
this.radiusGridlinePaint = paint;
fireChangeEvent();
}
/**
* Generates a list of tick values for the angular tick marks.
*
* @return A list of {@link NumberTick} instances.
*
* @since 1.0.10
*/
protected List refreshAngleTicks() {
List ticks = new ArrayList();
for (double currentTickVal = 0.0; currentTickVal < 360.0;
currentTickVal += this.angleTickUnit.getSize()) {
NumberTick tick = new NumberTick(new Double(currentTickVal),
this.angleTickUnit.valueToString(currentTickVal),
TextAnchor.CENTER, TextAnchor.CENTER, 0.0);
ticks.add(tick);
}
return ticks;
}
/**
* Draws the plot on a Java 2D graphics device (such as the screen or a
* printer).
* <P>
* This plot relies on a {@link PolarItemRenderer} to draw each
* item in the plot. This allows the visual representation of the data to
* be changed easily.
* <P>
* The optional info argument collects information about the rendering of
* the plot (dimensions, tooltip information etc). Just pass in
* <code>null if you do not need this information.
*
* @param g2 the graphics device.
* @param area the area within which the plot (including axes and
* labels) should be drawn.
* @param anchor the anchor point (<code>null permitted).
* @param parentState ignored.
* @param info collects chart drawing information (<code>null
* permitted).
*/
public void draw(Graphics2D g2,
Rectangle2D area,
Point2D anchor,
PlotState parentState,
PlotRenderingInfo info) {
// if the plot area is too small, just return...
boolean b1 = (area.getWidth() <= MINIMUM_WIDTH_TO_DRAW);
boolean b2 = (area.getHeight() <= MINIMUM_HEIGHT_TO_DRAW);
if (b1 || b2) {
return;
}
// record the plot area...
if (info != null) {
info.setPlotArea(area);
}
// adjust the drawing area for the plot insets (if any)...
RectangleInsets insets = getInsets();
insets.trim(area);
Rectangle2D dataArea = area;
if (info != null) {
info.setDataArea(dataArea);
}
// draw the plot background and axes...
drawBackground(g2, dataArea);
double h = Math.min(dataArea.getWidth() / 2.0,
dataArea.getHeight() / 2.0) - MARGIN;
Rectangle2D quadrant = new Rectangle2D.Double(dataArea.getCenterX(),
dataArea.getCenterY(), h, h);
AxisState state = drawAxis(g2, area, quadrant);
if (this.renderer != null) {
Shape originalClip = g2.getClip();
Composite originalComposite = g2.getComposite();
g2.clip(dataArea);
g2.setComposite(AlphaComposite.getInstance(
AlphaComposite.SRC_OVER, getForegroundAlpha()));
this.angleTicks = refreshAngleTicks();
drawGridlines(g2, dataArea, this.angleTicks, state.getTicks());
// draw...
render(g2, dataArea, info);
g2.setClip(originalClip);
g2.setComposite(originalComposite);
}
drawOutline(g2, dataArea);
drawCornerTextItems(g2, dataArea);
}
/**
* Draws the corner text items.
*
* @param g2 the drawing surface.
* @param area the area.
*/
protected void drawCornerTextItems(Graphics2D g2, Rectangle2D area) {
if (this.cornerTextItems.isEmpty()) {
return;
}
g2.setColor(Color.black);
double width = 0.0;
double height = 0.0;
for (Iterator it = this.cornerTextItems.iterator(); it.hasNext();) {
String msg = (String) it.next();
FontMetrics fm = g2.getFontMetrics();
Rectangle2D bounds = TextUtilities.getTextBounds(msg, g2, fm);
width = Math.max(width, bounds.getWidth());
height += bounds.getHeight();
}
double xadj = ANNOTATION_MARGIN * 2.0;
double yadj = ANNOTATION_MARGIN;
width += xadj;
height += yadj;
double x = area.getMaxX() - width;
double y = area.getMaxY() - height;
g2.drawRect((int) x, (int) y, (int) width, (int) height);
x += ANNOTATION_MARGIN;
for (Iterator it = this.cornerTextItems.iterator(); it.hasNext();) {
String msg = (String) it.next();
Rectangle2D bounds = TextUtilities.getTextBounds(msg, g2,
g2.getFontMetrics());
y += bounds.getHeight();
g2.drawString(msg, (int) x, (int) y);
}
}
/**
* A utility method for drawing the axes.
*
* @param g2 the graphics device.
* @param plotArea the plot area.
* @param dataArea the data area.
*
* @return A map containing the axis states.
*/
protected AxisState drawAxis(Graphics2D g2, Rectangle2D plotArea,
Rectangle2D dataArea) {
return this.axis.draw(g2, dataArea.getMinY(), plotArea, dataArea,
RectangleEdge.TOP, null);
}
/**
* Draws a representation of the data within the dataArea region, using the
* current m_Renderer.
*
* @param g2 the graphics device.
* @param dataArea the region in which the data is to be drawn.
* @param info an optional object for collection dimension
* information (<code>null permitted).
*/
protected void render(Graphics2D g2,
Rectangle2D dataArea,
PlotRenderingInfo info) {
// now get the data and plot it (the visual representation will depend
// on the m_Renderer that has been set)...
if (!DatasetUtilities.isEmptyOrNull(this.dataset)) {
int seriesCount = this.dataset.getSeriesCount();
for (int series = 0; series < seriesCount; series++) {
this.renderer.drawSeries(g2, dataArea, info, this,
this.dataset, series);
}
}
else {
drawNoDataMessage(g2, dataArea);
}
}
/**
* Draws the gridlines for the plot, if they are visible.
*
* @param g2 the graphics device.
* @param dataArea the data area.
* @param angularTicks the ticks for the angular axis.
* @param radialTicks the ticks for the radial axis.
*/
protected void drawGridlines(Graphics2D g2, Rectangle2D dataArea,
List angularTicks, List radialTicks) {
// no renderer, no gridlines...
if (this.renderer == null) {
return;
}
// draw the domain grid lines, if any...
if (isAngleGridlinesVisible()) {
Stroke gridStroke = getAngleGridlineStroke();
Paint gridPaint = getAngleGridlinePaint();
if ((gridStroke != null) && (gridPaint != null)) {
this.renderer.drawAngularGridLines(g2, this, angularTicks,
dataArea);
}
}
// draw the radius grid lines, if any...
if (isRadiusGridlinesVisible()) {
Stroke gridStroke = getRadiusGridlineStroke();
Paint gridPaint = getRadiusGridlinePaint();
if ((gridStroke != null) && (gridPaint != null)) {
this.renderer.drawRadialGridLines(g2, this, this.axis,
radialTicks, dataArea);
}
}
}
/**
* Zooms the axis ranges by the specified percentage about the anchor point.
*
* @param percent the amount of the zoom.
*/
public void zoom(double percent) {
if (percent > 0.0) {
double radius = getMaxRadius();
double scaledRadius = radius * percent;
this.axis.setUpperBound(scaledRadius);
getAxis().setAutoRange(false);
}
else {
getAxis().setAutoRange(true);
}
}
/**
* Returns the range for the specified axis.
*
* @param axis the axis.
*
* @return The range.
*/
public Range getDataRange(ValueAxis axis) {
Range result = null;
if (this.dataset != null) {
result = Range.combine(result,
DatasetUtilities.findRangeBounds(this.dataset));
}
return result;
}
/**
* Receives notification of a change to the plot's m_Dataset.
* <P>
* The axis ranges are updated if necessary.
*
* @param event information about the event (not used here).
*/
public void datasetChanged(DatasetChangeEvent event) {
if (this.axis != null) {
this.axis.configure();
}
if (getParent() != null) {
getParent().datasetChanged(event);
}
else {
super.datasetChanged(event);
}
}
/**
* Notifies all registered listeners of a property change.
* <P>
* One source of property change events is the plot's m_Renderer.
*
* @param event information about the property change.
*/
public void rendererChanged(RendererChangeEvent event) {
fireChangeEvent();
}
/**
* Returns the number of series in the dataset for this plot. If the
* dataset is <code>null, the method returns 0.
*
* @return The series count.
*/
public int getSeriesCount() {
int result = 0;
if (this.dataset != null) {
result = this.dataset.getSeriesCount();
}
return result;
}
/**
* Returns the legend items for the plot. Each legend item is generated by
* the plot's m_Renderer, since the m_Renderer is responsible for the visual
* representation of the data.
*
* @return The legend items.
*/
public LegendItemCollection getLegendItems() {
LegendItemCollection result = new LegendItemCollection();
// get the legend items for the main m_Dataset...
if (this.dataset != null) {
if (this.renderer != null) {
int seriesCount = this.dataset.getSeriesCount();
for (int i = 0; i < seriesCount; i++) {
LegendItem item = this.renderer.getLegendItem(i);
result.add(item);
}
}
}
return result;
}
/**
* Tests this plot for equality with another object.
*
* @param obj the object (<code>null permitted).
*
* @return <code>true or false.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof PolarPlot)) {
return false;
}
PolarPlot that = (PolarPlot) obj;
if (!ObjectUtilities.equal(this.axis, that.axis)) {
return false;
}
if (!ObjectUtilities.equal(this.renderer, that.renderer)) {
return false;
}
if (!this.angleTickUnit.equals(that.angleTickUnit)) {
return false;
}
if (this.angleGridlinesVisible != that.angleGridlinesVisible) {
return false;
}
if (this.angleLabelsVisible != that.angleLabelsVisible) {
return false;
}
if (!this.angleLabelFont.equals(that.angleLabelFont)) {
return false;
}
if (!PaintUtilities.equal(this.angleLabelPaint, that.angleLabelPaint)) {
return false;
}
if (!ObjectUtilities.equal(this.angleGridlineStroke,
that.angleGridlineStroke)) {
return false;
}
if (!PaintUtilities.equal(
this.angleGridlinePaint, that.angleGridlinePaint
)) {
return false;
}
if (this.radiusGridlinesVisible != that.radiusGridlinesVisible) {
return false;
}
if (!ObjectUtilities.equal(this.radiusGridlineStroke,
that.radiusGridlineStroke)) {
return false;
}
if (!PaintUtilities.equal(this.radiusGridlinePaint,
that.radiusGridlinePaint)) {
return false;
}
if (!this.cornerTextItems.equals(that.cornerTextItems)) {
return false;
}
return super.equals(obj);
}
/**
* Returns a clone of the plot.
*
* @return A clone.
*
* @throws CloneNotSupportedException this can occur if some component of
* the plot cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
PolarPlot clone = (PolarPlot) super.clone();
if (this.axis != null) {
clone.axis = (ValueAxis) ObjectUtilities.clone(this.axis);
clone.axis.setPlot(clone);
clone.axis.addChangeListener(clone);
}
if (clone.dataset != null) {
clone.dataset.addChangeListener(clone);
}
if (this.renderer != null) {
clone.renderer
= (PolarItemRenderer) ObjectUtilities.clone(this.renderer);
}
clone.cornerTextItems = new ArrayList(this.cornerTextItems);
return clone;
}
/**
* Provides serialization support.
*
* @param stream the output stream.
*
* @throws IOException if there is an I/O error.
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
stream.defaultWriteObject();
SerialUtilities.writeStroke(this.angleGridlineStroke, stream);
SerialUtilities.writePaint(this.angleGridlinePaint, stream);
SerialUtilities.writeStroke(this.radiusGridlineStroke, stream);
SerialUtilities.writePaint(this.radiusGridlinePaint, stream);
SerialUtilities.writePaint(this.angleLabelPaint, stream);
}
/**
* Provides serialization support.
*
* @param stream the input stream.
*
* @throws IOException if there is an I/O error.
* @throws ClassNotFoundException if there is a classpath problem.
*/
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException {
stream.defaultReadObject();
this.angleGridlineStroke = SerialUtilities.readStroke(stream);
this.angleGridlinePaint = SerialUtilities.readPaint(stream);
this.radiusGridlineStroke = SerialUtilities.readStroke(stream);
this.radiusGridlinePaint = SerialUtilities.readPaint(stream);
this.angleLabelPaint = SerialUtilities.readPaint(stream);
if (this.axis != null) {
this.axis.setPlot(this);
this.axis.addChangeListener(this);
}
if (this.dataset != null) {
this.dataset.addChangeListener(this);
}
}
/**
* This method is required by the {@link Zoomable} interface, but since
* the plot does not have any domain axes, it does nothing.
*
* @param factor the zoom factor.
* @param state the plot state.
* @param source the source point (in Java2D coordinates).
*/
public void zoomDomainAxes(double factor, PlotRenderingInfo state,
Point2D source) {
// do nothing
}
/**
* This method is required by the {@link Zoomable} interface, but since
* the plot does not have any domain axes, it does nothing.
*
* @param factor the zoom factor.
* @param state the plot state.
* @param source the source point (in Java2D coordinates).
* @param useAnchor use source point as zoom anchor?
*
* @since 1.0.7
*/
public void zoomDomainAxes(double factor, PlotRenderingInfo state,
Point2D source, boolean useAnchor) {
// do nothing
}
/**
* This method is required by the {@link Zoomable} interface, but since
* the plot does not have any domain axes, it does nothing.
*
* @param lowerPercent the new lower bound.
* @param upperPercent the new upper bound.
* @param state the plot state.
* @param source the source point (in Java2D coordinates).
*/
public void zoomDomainAxes(double lowerPercent, double upperPercent,
PlotRenderingInfo state, Point2D source) {
// do nothing
}
/**
* Multiplies the range on the range axis/axes by the specified factor.
*
* @param factor the zoom factor.
* @param state the plot state.
* @param source the source point (in Java2D coordinates).
*/
public void zoomRangeAxes(double factor, PlotRenderingInfo state,
Point2D source) {
zoom(factor);
}
/**
* Multiplies the range on the range axis by the specified factor.
*
* @param factor the zoom factor.
* @param info the plot rendering info.
* @param source the source point (in Java2D space).
* @param useAnchor use source point as zoom anchor?
*
* @see #zoomDomainAxes(double, PlotRenderingInfo, Point2D, boolean)
*
* @since 1.0.7
*/
public void zoomRangeAxes(double factor, PlotRenderingInfo info,
Point2D source, boolean useAnchor) {
if (useAnchor) {
// get the source coordinate - this plot has always a VERTICAL
// orientation
double sourceX = source.getX();
double anchorX = this.axis.java2DToValue(sourceX,
info.getDataArea(), RectangleEdge.BOTTOM);
this.axis.resizeRange(factor, anchorX);
}
else {
this.axis.resizeRange(factor);
}
}
/**
* Zooms in on the range axes.
*
* @param lowerPercent the new lower bound.
* @param upperPercent the new upper bound.
* @param state the plot state.
* @param source the source point (in Java2D coordinates).
*/
public void zoomRangeAxes(double lowerPercent, double upperPercent,
PlotRenderingInfo state, Point2D source) {
zoom((upperPercent + lowerPercent) / 2.0);
}
/**
* Returns <code>false always.
*
* @return <code>false always.
*/
public boolean isDomainZoomable() {
return false;
}
/**
* Returns <code>true to indicate that the range axis is zoomable.
*
* @return <code>true.
*/
public boolean isRangeZoomable() {
return true;
}
/**
* Returns the orientation of the plot.
*
* @return The orientation.
*/
public PlotOrientation getOrientation() {
return PlotOrientation.HORIZONTAL;
}
/**
* Returns the upper bound of the radius axis.
*
* @return The upper bound.
*/
public double getMaxRadius() {
return this.axis.getUpperBound();
}
/**
* Translates a (theta, radius) pair into Java2D coordinates. If
* <code>radius is less than the lower bound of the axis, then
* this method returns the centre point.
*
* @param angleDegrees the angle in degrees.
* @param radius the radius.
* @param dataArea the data area.
*
* @return A point in Java2D space.
*/
public Point translateValueThetaRadiusToJava2D(double angleDegrees,
double radius,
Rectangle2D dataArea) {
double radians = Math.toRadians(angleDegrees - 90.0);
double minx = dataArea.getMinX() + MARGIN;
double maxx = dataArea.getMaxX() - MARGIN;
double miny = dataArea.getMinY() + MARGIN;
double maxy = dataArea.getMaxY() - MARGIN;
double lengthX = maxx - minx;
double lengthY = maxy - miny;
double length = Math.min(lengthX, lengthY);
double midX = minx + lengthX / 2.0;
double midY = miny + lengthY / 2.0;
double axisMin = this.axis.getLowerBound();
double axisMax = getMaxRadius();
double adjustedRadius = Math.max(radius, axisMin);
double xv = length / 2.0 * Math.cos(radians);
double yv = length / 2.0 * Math.sin(radians);
float x = (float) (midX + (xv * (adjustedRadius - axisMin)
/ (axisMax - axisMin)));
float y = (float) (midY + (yv * (adjustedRadius - axisMin)
/ (axisMax - axisMin)));
int ix = Math.round(x);
int iy = Math.round(y);
Point p = new Point(ix, iy);
return p;
}
}
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