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jfreechart example source code file (Block.java)

This example jfreechart source code file (Block.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, block, drawable, drawable, geometry, object, object, rectangle2d, rectangle2d, rectangleconstraint, size2d, size2d, string

The jfreechart Block.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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.]
 *
 * ----------
 * Block.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);
 * 08-Feb-2005 : Added ID (DG);
 * 20-Apr-2005 : Added a new draw() method that can accept params
 *               and return results (DG);
 *
 */

package org.jfree.chart.block;

import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;

import org.jfree.ui.Drawable;
import org.jfree.ui.Size2D;

/**
 * A block is an arbitrary item that can be drawn (in Java2D space) within a
 * rectangular area, has a preferred size, and can be arranged by an
 * {@link Arrangement} manager.
 */
public interface Block extends Drawable {

    /**
     * Returns an ID for the block.
     *
     * @return An ID.
     */
    public String getID();

    /**
     * Sets the ID for the block.
     *
     * @param id  the ID.
     */
    public void setID(String id);

    /**
     * Arranges the contents of the block, with no constraints, and returns
     * the block size.
     *
     * @param g2  the graphics device.
     *
     * @return The size of the block.
     */
    public Size2D arrange(Graphics2D g2);

    /**
     * Arranges the contents of the block, within the given constraints, and
     * returns the block size.
     *
     * @param g2  the graphics device.
     * @param constraint  the constraint (<code>null not permitted).
     *
     * @return The block size (in Java2D units, never <code>null).
     */
    public Size2D arrange(Graphics2D g2, RectangleConstraint constraint);

    /**
     * Returns the current bounds of the block.
     *
     * @return The bounds.
     */
    public Rectangle2D getBounds();

    /**
     * Sets the bounds of the block.
     *
     * @param bounds  the bounds.
     */
    public void setBounds(Rectangle2D bounds);

    /**
     * Draws the block within the specified area.  Refer to the documentation
     * for the implementing class for information about the <code>params
     * and return value supported.
     *
     * @param g2  the graphics device.
     * @param area  the area.
     * @param params  optional parameters (<code>null permitted).
     *
     * @return An optional return value (possibly <code>null).
     */
    public Object draw(Graphics2D g2, Rectangle2D area, Object params);

}

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