/* ===========================================================
* 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.]
*
* ---------------
* EmptyBlock.java
* ---------------
* (C) Copyright 2004-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes:
* --------
* 22-Oct-2004 : Version 1 (DG);
* 04-Feb-2005 : Now cloneable and serializable (DG);
* 20-Apr-2005 : Added new draw() method (DG);
*
*/
package org.jfree.chart.block;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import org.jfree.util.PublicCloneable;
/**
* An empty block with a fixed size.
*/
public class EmptyBlock extends AbstractBlock
implements Block, Cloneable, PublicCloneable,
Serializable {
/** For serialization. */
private static final long serialVersionUID = -4083197869412648579L;
/**
* Creates a new block with the specified width and height.
*
* @param width the width.
* @param height the height.
*/
public EmptyBlock(double width, double height) {
setWidth(width);
setHeight(height);
}
/**
* Draws the block. Since the block is empty, this method does nothing.
*
* @param g2 the graphics device.
* @param area the area.
*/
public void draw(Graphics2D g2, Rectangle2D area) {
// do nothing, we're empty
}
/**
* Draws the block within the specified area. Since the block is empty,
* this method does nothing.
*
* @param g2 the graphics device.
* @param area the area.
* @param params ignored (<code>null</code> permitted).
*
* @return Always <code>null</code>.
*/
public Object draw(Graphics2D g2, Rectangle2D area, Object params) {
return null;
}
/**
* Returns a clone of the block.
*
* @return A clone.
*
* @throws CloneNotSupportedException if there is a problem cloning.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}
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