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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2013, 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.]
*
* ---------------------
* XYLineAnnotation.java
* ---------------------
* (C) Copyright 2003-2013, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Peter Kolb (see patch 2809117);
*
* Changes:
* --------
* 02-Apr-2003 : Version 1 (DG);
* 19-Aug-2003 : Added equals method, implemented Cloneable, and applied
* serialization fixes (DG);
* 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
* 14-Apr-2004 : Fixed draw() method to handle plot orientation correctly (DG);
* 29-Sep-2004 : Added support for tool tips and URLS, now extends
* AbstractXYAnnotation (DG);
* 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG);
* 08-Jun-2005 : Fixed equals() method to handle GradientPaint() (DG);
* 05-Nov-2008 : Added workaround for JRE bug 6574155, see JFreeChart bug
* 2221495 (DG);
* 02-Jul-2013 : Use ParamChecks (DG);
*
*/
package org.jfree.chart.annotations;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
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.chart.util.LineUtilities;
import org.jfree.chart.util.ParamChecks;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;
/**
* A simple line annotation that can be placed on an {@link XYPlot}.
*/
public class XYLineAnnotation extends AbstractXYAnnotation
implements Cloneable, PublicCloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = -80535465244091334L;
/** The x-coordinate. */
private double x1;
/** The y-coordinate. */
private double y1;
/** The x-coordinate. */
private double x2;
/** The y-coordinate. */
private double y2;
/** The line stroke. */
private transient Stroke stroke;
/** The line color. */
private transient Paint paint;
/**
* Creates a new annotation that draws a line from (x1, y1) to (x2, y2)
* where the coordinates are measured in data space (that is, against the
* plot's axes).
*
* @param x1 the x-coordinate for the start of the line.
* @param y1 the y-coordinate for the start of the line.
* @param x2 the x-coordinate for the end of the line.
* @param y2 the y-coordinate for the end of the line.
*/
public XYLineAnnotation(double x1, double y1, double x2, double y2) {
this(x1, y1, x2, y2, new BasicStroke(1.0f), Color.black);
}
/**
* Creates a new annotation that draws a line from (x1, y1) to (x2, y2)
* where the coordinates are measured in data space (that is, against the
* plot's axes).
*
* @param x1 the x-coordinate for the start of the line.
* @param y1 the y-coordinate for the start of the line.
* @param x2 the x-coordinate for the end of the line.
* @param y2 the y-coordinate for the end of the line.
* @param stroke the line stroke (null not permitted).
* @param paint the line color (null not permitted).
*/
public XYLineAnnotation(double x1, double y1, double x2, double y2,
Stroke stroke, Paint paint) {
super();
ParamChecks.nullNotPermitted(stroke, "stroke");
ParamChecks.nullNotPermitted(paint, "paint");
this.x1 = x1;
this.y1 = y1;
this.x2 = x2;
this.y2 = y2;
this.stroke = stroke;
this.paint = paint;
}
/**
* Draws the annotation. This method is called by the {@link XYPlot}
* class, you won't normally need to call it yourself.
*
* @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 if supplied, this info object will be populated with
* entity information.
*/
@Override
public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea,
ValueAxis domainAxis, ValueAxis rangeAxis,
int rendererIndex,
PlotRenderingInfo info) {
PlotOrientation orientation = plot.getOrientation();
RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
plot.getDomainAxisLocation(), orientation);
RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
plot.getRangeAxisLocation(), orientation);
float j2DX1 = 0.0f;
float j2DX2 = 0.0f;
float j2DY1 = 0.0f;
float j2DY2 = 0.0f;
if (orientation == PlotOrientation.VERTICAL) {
j2DX1 = (float) domainAxis.valueToJava2D(this.x1, dataArea,
domainEdge);
j2DY1 = (float) rangeAxis.valueToJava2D(this.y1, dataArea,
rangeEdge);
j2DX2 = (float) domainAxis.valueToJava2D(this.x2, dataArea,
domainEdge);
j2DY2 = (float) rangeAxis.valueToJava2D(this.y2, dataArea,
rangeEdge);
}
else if (orientation == PlotOrientation.HORIZONTAL) {
j2DY1 = (float) domainAxis.valueToJava2D(this.x1, dataArea,
domainEdge);
j2DX1 = (float) rangeAxis.valueToJava2D(this.y1, dataArea,
rangeEdge);
j2DY2 = (float) domainAxis.valueToJava2D(this.x2, dataArea,
domainEdge);
j2DX2 = (float) rangeAxis.valueToJava2D(this.y2, dataArea,
rangeEdge);
}
g2.setPaint(this.paint);
g2.setStroke(this.stroke);
Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2);
// line is clipped to avoid JRE bug 6574155, for more info
// see JFreeChart bug 2221495
boolean visible = LineUtilities.clipLine(line, dataArea);
if (visible) {
g2.draw(line);
}
String toolTip = getToolTipText();
String url = getURL();
if (toolTip != null || url != null) {
addEntity(info, ShapeUtilities.createLineRegion(line, 1.0f),
rendererIndex, toolTip, url);
}
}
/**
* Tests this object for equality with an arbitrary object.
*
* @param obj the object to test against (null permitted).
*
* @return true or false.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!super.equals(obj)) {
return false;
}
if (!(obj instanceof XYLineAnnotation)) {
return false;
}
XYLineAnnotation that = (XYLineAnnotation) obj;
if (this.x1 != that.x1) {
return false;
}
if (this.y1 != that.y1) {
return false;
}
if (this.x2 != that.x2) {
return false;
}
if (this.y2 != that.y2) {
return false;
}
if (!PaintUtilities.equal(this.paint, that.paint)) {
return false;
}
if (!ObjectUtilities.equal(this.stroke, that.stroke)) {
return false;
}
// seems to be the same...
return true;
}
/**
* Returns a hash code.
*
* @return A hash code.
*/
@Override
public int hashCode() {
int result;
long temp;
temp = Double.doubleToLongBits(this.x1);
result = (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.x2);
result = 29 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.y1);
result = 29 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.y2);
result = 29 * result + (int) (temp ^ (temp >>> 32));
return result;
}
/**
* Returns a clone of the annotation.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the annotation can't be cloned.
*/
@Override
public Object clone() throws CloneNotSupportedException {
return super.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.writePaint(this.paint, stream);
SerialUtilities.writeStroke(this.stroke, 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.paint = SerialUtilities.readPaint(stream);
this.stroke = SerialUtilities.readStroke(stream);
}
}