/* ===========================================================
* 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.]
*
* ----------------
* BlockBorder.java
* ----------------
* (C) Copyright 2004-2008, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes:
* --------
* 22-Oct-2004 : Version 1 (DG);
* 04-Feb-2005 : Added equals() and implemented Serializable (DG);
* 23-Feb-2005 : Added attribute for border color (DG);
* 06-May-2005 : Added new convenience constructors (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 16-Mar-2007 : Implemented BlockFrame (DG);
*
*/
package org.jfree.chart.block;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
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.PaintUtilities;
/**
* A border for a block. This class is immutable.
*/
public class BlockBorder implements BlockFrame, Serializable {
/** For serialization. */
private static final long serialVersionUID = 4961579220410228283L;
/** An empty border. */
public static final BlockBorder NONE = new BlockBorder(
RectangleInsets.ZERO_INSETS, Color.white);
/** The space reserved for the border. */
private RectangleInsets insets;
/** The border color. */
private transient Paint paint;
/**
* Creates a default border.
*/
public BlockBorder() {
this(Color.black);
}
/**
* Creates a new border with the specified color.
*
* @param paint the color (<code>null</code> not permitted).
*/
public BlockBorder(Paint paint) {
this(new RectangleInsets(1, 1, 1, 1), paint);
}
/**
* Creates a new border with the specified line widths (in black).
*
* @param top the width of the top border.
* @param left the width of the left border.
* @param bottom the width of the bottom border.
* @param right the width of the right border.
*/
public BlockBorder(double top, double left, double bottom, double right) {
this(new RectangleInsets(top, left, bottom, right), Color.black);
}
/**
* Creates a new border with the specified line widths (in black).
*
* @param top the width of the top border.
* @param left the width of the left border.
* @param bottom the width of the bottom border.
* @param right the width of the right border.
* @param paint the border paint (<code>null</code> not permitted).
*/
public BlockBorder(double top, double left, double bottom, double right,
Paint paint) {
this(new RectangleInsets(top, left, bottom, right), paint);
}
/**
* Creates a new border.
*
* @param insets the border insets (<code>null</code> not permitted).
* @param paint the paint (<code>null</code> not permitted).
*/
public BlockBorder(RectangleInsets insets, Paint paint) {
if (insets == null) {
throw new IllegalArgumentException("Null 'insets' argument.");
}
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.insets = insets;
this.paint = paint;
}
/**
* Returns the space reserved for the border.
*
* @return The space (never <code>null</code>).
*/
public RectangleInsets getInsets() {
return this.insets;
}
/**
* Returns the paint used to draw the border.
*
* @return The paint (never <code>null</code>).
*/
public Paint getPaint() {
return this.paint;
}
/**
* Draws the border by filling in the reserved space.
*
* @param g2 the graphics device.
* @param area the area.
*/
public void draw(Graphics2D g2, Rectangle2D area) {
// this default implementation will just fill the available
// border space with a single color
double top = this.insets.calculateTopInset(area.getHeight());
double bottom = this.insets.calculateBottomInset(area.getHeight());
double left = this.insets.calculateLeftInset(area.getWidth());
double right = this.insets.calculateRightInset(area.getWidth());
double x = area.getX();
double y = area.getY();
double w = area.getWidth();
double h = area.getHeight();
g2.setPaint(this.paint);
Rectangle2D rect = new Rectangle2D.Double();
if (top > 0.0) {
rect.setRect(x, y, w, top);
g2.fill(rect);
}
if (bottom > 0.0) {
rect.setRect(x, y + h - bottom, w, bottom);
g2.fill(rect);
}
if (left > 0.0) {
rect.setRect(x, y, left, h);
g2.fill(rect);
}
if (right > 0.0) {
rect.setRect(x + w - right, y, right, h);
g2.fill(rect);
}
}
/**
* 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 BlockBorder)) {
return false;
}
BlockBorder that = (BlockBorder) obj;
if (!this.insets.equals(that.insets)) {
return false;
}
if (!PaintUtilities.equal(this.paint, that.paint)) {
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);
}
/**
* 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);
}
}