/* ===========================================================
* 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.]
*
* ----------
* 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</code> not permitted).
*
* @return The block size (in Java2D units, never <code>null</code>).
*/
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</code>
* and return value supported.
*
* @param g2 the graphics device.
* @param area the area.
* @param params optional parameters (<code>null</code> permitted).
*
* @return An optional return value (possibly <code>null</code>).
*/
public Object draw(Graphics2D g2, Rectangle2D area, Object params);
}
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