Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2011, 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. * * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners.] * * ------------------------ * XYPolygonAnnotation.java * ------------------------ * (C) Copyright 2005-2009, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): Peter Kolb (patch 2809117); * * Changes: * -------- * 09-Feb-2005 : Version 1 (DG); * */ package longMethod.jfreechart.draw; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Graphics2D; import java.awt.Paint; import java.awt.Stroke; import java.awt.geom.GeneralPath; import java.awt.geom.Rectangle2D; import java.io.Serializable; import org.jfree.chart.annotations.AbstractXYAnnotation; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.Plot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.chart.plot.XYPlot; import org.jfree.ui.RectangleEdge; import org.jfree.util.PublicCloneable; /** * A polygon annotation that can be placed on an {@link XYPlot}. The * polygon coordinates are specified in data space. */ public class XYPolygonAnnotation extends AbstractXYAnnotation implements Cloneable, PublicCloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = -6984203651995900036L; /** The polygon. */ private double[] polygon; /** The stroke used to draw the box outline. */ private transient Stroke stroke; /** The paint used to draw the box outline. */ private transient Paint outlinePaint; /** The paint used to fill the box. */ private transient Paint fillPaint; /** * Creates a new annotation (where, by default, the polygon is drawn * with a black outline). The array of polygon coordinates must contain * an even number of coordinates (each pair is an (x, y) location on the * plot) and the last point is automatically joined back to the first point. * * @param polygon the coordinates of the polygon's vertices * (<code>null</code> not permitted). */ public XYPolygonAnnotation(double[] polygon) { this(polygon, new BasicStroke(1.0f), Color.black); } /** * Creates a new annotation where the box is drawn as an outline using * the specified <code>stroke</code> and <code>outlinePaint</code>. * The array of polygon coordinates must contain an even number of * coordinates (each pair is an (x, y) location on the plot) and the last * point is automatically joined back to the first point. * * @param polygon the coordinates of the polygon's vertices * (<code>null</code> not permitted). * @param stroke the shape stroke (<code>null</code> permitted). * @param outlinePaint the shape color (<code>null</code> permitted). */ public XYPolygonAnnotation(double[] polygon, Stroke stroke, Paint outlinePaint) { this(polygon, stroke, outlinePaint, null); } /** * Creates a new annotation. The array of polygon coordinates must * contain an even number of coordinates (each pair is an (x, y) location * on the plot) and the last point is automatically joined back to the * first point. * * @param polygon the coordinates of the polygon's vertices * (<code>null</code> not permitted). * @param stroke the shape stroke (<code>null</code> permitted). * @param outlinePaint the shape color (<code>null</code> permitted). * @param fillPaint the paint used to fill the shape (<code>null</code> * permitted). */ public XYPolygonAnnotation(double[] polygon, Stroke stroke, Paint outlinePaint, Paint fillPaint) { super(); if (polygon == null) { throw new IllegalArgumentException("Null 'polygon' argument."); } if (polygon.length % 2 != 0) { throw new IllegalArgumentException("The 'polygon' array must " + "contain an even number of items."); } this.polygon = (double[]) polygon.clone(); this.stroke = stroke; this.outlinePaint = outlinePaint; this.fillPaint = fillPaint; } /** * Returns the coordinates of the polygon's vertices. The returned array * is a copy, so it is safe to modify without altering the annotation's * state. * * @return The coordinates of the polygon's vertices. * * @since 1.0.2 */ public double[] getPolygonCoordinates() { return (double[]) this.polygon.clone(); } /** * Returns the fill paint. * * @return The fill paint (possibly <code>null</code>). * * @since 1.0.2 */ public Paint getFillPaint() { return this.fillPaint; } /** * Returns the outline stroke. * * @return The outline stroke (possibly <code>null</code>). * * @since 1.0.2 */ public Stroke getOutlineStroke() { return this.stroke; } /** * Returns the outline paint. * * @return The outline paint (possibly <code>null</code>). * * @since 1.0.2 */ public Paint getOutlinePaint() { return this.outlinePaint; } /** * Draws the annotation. This method is usually called by the * {@link XYPlot} class, you shouldn't need to call it directly. * * @param g2 the graphics device. * @param plot the plot. * @param dataArea the data area. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param rendererIndex the renderer index. * @param info the plot rendering info. */ public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea, ValueAxis domainAxis, ValueAxis rangeAxis, int rendererIndex, PlotRenderingInfo info) { // if we don't have at least 2 (x, y) coordinates, just return if (this.polygon.length < 4) { return; } PlotOrientation orientation = plot.getOrientation(); RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(plot.getDomainAxisLocation(), orientation); RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(plot.getRangeAxisLocation(), orientation); GeneralPath area = new GeneralPath(); double x = domainAxis.valueToJava2D(this.polygon[0], dataArea, domainEdge); double y = rangeAxis.valueToJava2D(this.polygon[1], dataArea, rangeEdge); if (orientation == PlotOrientation.HORIZONTAL) { area.moveTo((float) y, (float) x); for (int i = 2; i < this.polygon.length; i += 2) { x = domainAxis.valueToJava2D(this.polygon[i], dataArea, domainEdge); y = rangeAxis.valueToJava2D(this.polygon[i + 1], dataArea, rangeEdge); area.lineTo((float) y, (float) x); } area.closePath(); } else if (orientation == PlotOrientation.VERTICAL) { area.moveTo((float) x, (float) y); for (int i = 2; i < this.polygon.length; i += 2) { x = domainAxis.valueToJava2D(this.polygon[i], dataArea, domainEdge); y = rangeAxis.valueToJava2D(this.polygon[i + 1], dataArea, rangeEdge); area.lineTo((float) x, (float) y); } area.closePath(); } if (this.fillPaint != null) { g2.setPaint(this.fillPaint); g2.fill(area); } if (this.stroke != null && this.outlinePaint != null) { g2.setPaint(this.outlinePaint); g2.setStroke(this.stroke); g2.draw(area); } addEntity(info, area, rendererIndex, getToolTipText(), getURL()); } }