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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 2000-2020, 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.]
*
* ---------------
* WindNeedle.java
* ---------------
* (C) Copyright 2002-2016, by the Australian Antarctic Division and
* Contributors.
*
* Original Author: Bryan Scott (for the Australian Antarctic Division);
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
*/
package org.jfree.chart.needle;
import java.awt.Graphics2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
/**
* A needle that indicates wind direction, for use with the
* {@link org.jfree.chart.plot.CompassPlot} class.
*/
public class WindNeedle extends ArrowNeedle implements Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = -2861061368907167834L;
/**
* Default constructor.
*/
public WindNeedle() {
super(false); // isArrowAtTop
}
/**
* Draws the needle.
*
* @param g2 the graphics device.
* @param plotArea the plot area.
* @param rotate the rotation point.
* @param angle the angle.
*/
@Override
protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
Point2D rotate, double angle) {
super.drawNeedle(g2, plotArea, rotate, angle);
if ((rotate != null) && (plotArea != null)) {
int spacing = getSize() * 3;
Rectangle2D newArea = new Rectangle2D.Double();
Point2D newRotate = rotate;
newArea.setRect(plotArea.getMinX() - spacing, plotArea.getMinY(),
plotArea.getWidth(), plotArea.getHeight());
super.drawNeedle(g2, newArea, newRotate, angle);
newArea.setRect(plotArea.getMinX() + spacing,
plotArea.getMinY(), plotArea.getWidth(),
plotArea.getHeight());
super.drawNeedle(g2, newArea, newRotate, angle);
}
}
/**
* Tests another object for equality with this object.
*
* @param object the object to test.
*
* @return A boolean.
*/
@Override
public boolean equals(Object object) {
if (object == null) {
return false;
}
if (object == this) {
return true;
}
if (super.equals(object) && object instanceof WindNeedle) {
return true;
}
return false;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
@Override
public int hashCode() {
return super.hashCode();
}
}