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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 2000-2017, 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.]
*
*/
package org.jfree.chart.ui;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import org.jfree.chart.util.Args;
/**
* Used to indicate an anchor point for a rectangle.
*/
public enum RectangleAnchor {
/** Center. */
CENTER("RectangleAnchor.CENTER"),
/** Top. */
TOP("RectangleAnchor.TOP"),
/** Top-Left. */
TOP_LEFT("RectangleAnchor.TOP_LEFT"),
/** Top-Right. */
TOP_RIGHT("RectangleAnchor.TOP_RIGHT"),
/** Bottom. */
BOTTOM("RectangleAnchor.BOTTOM"),
/** Bottom-Left. */
BOTTOM_LEFT("RectangleAnchor.BOTTOM_LEFT"),
/** Bottom-Right. */
BOTTOM_RIGHT("RectangleAnchor.BOTTOM_RIGHT"),
/** Left. */
LEFT("RectangleAnchor.LEFT"),
/** Right. */
RIGHT("RectangleAnchor.RIGHT");
/** The name. */
private final String name;
/**
* Private constructor.
*
* @param name the name.
*/
private RectangleAnchor(String name) {
this.name = name;
}
/**
* Returns the anchor point relative to the specified rectangle.
*
* @param rectangle the rectangle (null not permitted).
*
* @return The anchor point (never null).
*/
public Point2D getAnchorPoint(Rectangle2D rectangle) {
Args.nullNotPermitted(rectangle, "rectangle");
Point2D result = new Point2D.Double();
if (this == RectangleAnchor.CENTER) {
result.setLocation(rectangle.getCenterX(), rectangle.getCenterY());
} else if (this == RectangleAnchor.TOP) {
result.setLocation(rectangle.getCenterX(), rectangle.getMinY());
} else if (this == RectangleAnchor.BOTTOM) {
result.setLocation(rectangle.getCenterX(), rectangle.getMaxY());
} else if (this == RectangleAnchor.LEFT) {
result.setLocation(rectangle.getMinX(), rectangle.getCenterY());
} else if (this == RectangleAnchor.RIGHT) {
result.setLocation(rectangle.getMaxX(), rectangle.getCenterY());
} else if (this == RectangleAnchor.TOP_LEFT) {
result.setLocation(rectangle.getMinX(), rectangle.getMinY());
} else if (this == RectangleAnchor.TOP_RIGHT) {
result.setLocation(rectangle.getMaxX(), rectangle.getMinY());
} else if (this == RectangleAnchor.BOTTOM_LEFT) {
result.setLocation(rectangle.getMinX(), rectangle.getMaxY());
} else if (this == RectangleAnchor.BOTTOM_RIGHT) {
result.setLocation(rectangle.getMaxX(), rectangle.getMaxY());
}
return result;
}
/**
* Returns a string representing the object.
*
* @return The string.
*/
@Override
public String toString() {
return this.name;
}
/**
* Creates a new rectangle with the specified dimensions that is aligned to
* the given anchor point {@code (anchorX, anchorY)}.
*
* @param dimensions the dimensions ({@code null} not permitted).
* @param anchorX the x-anchor.
* @param anchorY the y-anchor.
* @param anchor the anchor ({@code null} not permitted).
*
* @return A rectangle.
*/
public static Rectangle2D createRectangle(Size2D dimensions,
double anchorX, double anchorY, RectangleAnchor anchor) {
Rectangle2D result = null;
double w = dimensions.getWidth();
double h = dimensions.getHeight();
if (anchor == RectangleAnchor.CENTER) {
result = new Rectangle2D.Double(anchorX - w / 2.0,
anchorY - h / 2.0, w, h);
} else if (anchor == RectangleAnchor.TOP) {
result = new Rectangle2D.Double(anchorX - w / 2.0, anchorY, w, h);
} else if (anchor == RectangleAnchor.BOTTOM) {
result = new Rectangle2D.Double(anchorX - w / 2.0, anchorY - h,
w, h);
} else if (anchor == RectangleAnchor.LEFT) {
result = new Rectangle2D.Double(anchorX, anchorY - h / 2.0, w, h);
} else if (anchor == RectangleAnchor.RIGHT) {
result = new Rectangle2D.Double(anchorX - w, anchorY - h / 2.0,
w, h);
} else if (anchor == RectangleAnchor.TOP_LEFT) {
result = new Rectangle2D.Double(anchorX, anchorY, w, h);
} else if (anchor == RectangleAnchor.TOP_RIGHT) {
result = new Rectangle2D.Double(anchorX - w, anchorY, w, h);
} else if (anchor == RectangleAnchor.BOTTOM_LEFT) {
result = new Rectangle2D.Double(anchorX, anchorY - h, w, h);
} else if (anchor == RectangleAnchor.BOTTOM_RIGHT) {
result = new Rectangle2D.Double(anchorX - w, anchorY - h, w, h);
}
return result;
}
}