/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.]
*
* ---------------
* LineBorder.java
* ---------------
* (C) Copyright 2007, by Christo Zietsman and Contributors.
*
* Original Author: Christo Zietsman;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* Changes:
* --------
* 16-Mar-2007 : Version 1, contributed by Christo Zietsman with
* modifications by DG (DG);
* 13-Jun-2007 : Don't draw if area doesn't have positive dimensions (DG);
*
*/
package org.jfree.chart.block;
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.io.SerialUtilities;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
/**
* A line border for any {@link AbstractBlock}.
*
* @since 1.0.5
*/
public class LineBorder implements BlockFrame, Serializable {
/** For serialization. */
static final long serialVersionUID = 4630356736707233924L;
/** The line color. */
private transient Paint paint;
/** The line stroke. */
private transient Stroke stroke;
/** The insets. */
private RectangleInsets insets;
/**
* Creates a default border.
*/
public LineBorder() {
this(Color.black, new BasicStroke(1.0f), new RectangleInsets(1.0, 1.0,
1.0, 1.0));
}
/**
* Creates a new border with the specified color.
*
* @param paint the color (<code>null</code> not permitted).
* @param stroke the border stroke (<code>null</code> not permitted).
* @param insets the insets (<code>null</code> not permitted).
*/
public LineBorder(Paint paint, Stroke stroke, RectangleInsets insets) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
if (stroke == null) {
throw new IllegalArgumentException("Null 'stroke' argument.");
}
if (insets == null) {
throw new IllegalArgumentException("Null 'insets' argument.");
}
this.paint = paint;
this.stroke = stroke;
this.insets = insets;
}
/**
* Returns the paint.
*
* @return The paint (never <code>null</code>).
*/
public Paint getPaint() {
return this.paint;
}
/**
* Returns the insets.
*
* @return The insets (never <code>null</code>).
*/
public RectangleInsets getInsets() {
return this.insets;
}
/**
* Returns the stroke.
*
* @return The stroke (never <code>null</code>).
*/
public Stroke getStroke() {
return this.stroke;
}
/**
* Draws the border by filling in the reserved space (in black).
*
* @param g2 the graphics device.
* @param area the area.
*/
public void draw(Graphics2D g2, Rectangle2D area) {
double w = area.getWidth();
double h = area.getHeight();
// if the area has zero height or width, we shouldn't draw anything
if (w <= 0.0 || h <= 0.0) {
return;
}
double t = this.insets.calculateTopInset(h);
double b = this.insets.calculateBottomInset(h);
double l = this.insets.calculateLeftInset(w);
double r = this.insets.calculateRightInset(w);
double x = area.getX();
double y = area.getY();
double x0 = x + l / 2.0;
double x1 = x + w - r / 2.0;
double y0 = y + h - b / 2.0;
double y1 = y + t / 2.0;
g2.setPaint(getPaint());
g2.setStroke(getStroke());
Line2D line = new Line2D.Double();
if (t > 0.0) {
line.setLine(x0, y1, x1, y1);
g2.draw(line);
}
if (b > 0.0) {
line.setLine(x0, y0, x1, y0);
g2.draw(line);
}
if (l > 0.0) {
line.setLine(x0, y0, x0, y1);
g2.draw(line);
}
if (r > 0.0) {
line.setLine(x1, y0, x1, y1);
g2.draw(line);
}
}
/**
* Tests this border for equality with an arbitrary instance.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof LineBorder)) {
return false;
}
LineBorder that = (LineBorder) obj;
if (!PaintUtilities.equal(this.paint, that.paint)) {
return false;
}
if (!ObjectUtilities.equal(this.stroke, that.stroke)) {
return false;
}
if (!this.insets.equals(that.insets)) {
return false;
}
return true;
}
/**
* 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);
}
}
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