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jfreechart example source code file (ColorBlock.java)
The jfreechart ColorBlock.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.] * * --------------- * ColorBlock.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); * 20-Apr-2005 : Added new draw() method (DG); * ------------- JFREECHART 1.0.x --------------------------------------------- * 16-Mar-2007 : Implemented equals() and fixed serialization (DG); * 08-Apr-2008 : Added code for margin, border and padding in draw() * method (DG); * */ package org.jfree.chart.block; 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 org.jfree.io.SerialUtilities; import org.jfree.ui.Size2D; import org.jfree.util.PaintUtilities; /** * A block that is filled with a single color. */ public class ColorBlock extends AbstractBlock implements Block { /** For serialization. */ static final long serialVersionUID = 3383866145634010865L; /** The paint. */ private transient Paint paint; /** * Creates a new block. * * @param paint the paint (<code>null not permitted). * @param width the width. * @param height the height. */ public ColorBlock(Paint paint, double width, double height) { if (paint == null) { throw new IllegalArgumentException("Null 'paint' argument."); } this.paint = paint; setWidth(width); setHeight(height); } /** * Returns the paint. * * @return The paint (never <code>null). * * @since 1.0.5 */ public Paint getPaint() { return this.paint; } /** * 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) { return new Size2D(calculateTotalWidth(getWidth()), calculateTotalHeight(getHeight())); } /** * Draws the block. * * @param g2 the graphics device. * @param area the area. */ public void draw(Graphics2D g2, Rectangle2D area) { area = trimMargin(area); drawBorder(g2, area); area = trimBorder(area); area = trimPadding(area); g2.setPaint(this.paint); g2.fill(area); } /** * Draws the block within the specified area. * * @param g2 the graphics device. * @param area the area. * @param params ignored (<code>null permitted). * * @return Always <code>null. */ public Object draw(Graphics2D g2, Rectangle2D area, Object params) { draw(g2, area); return null; } /** * Tests this block for equality with an arbitrary object. * * @param obj the object (<code>null permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof ColorBlock)) { return false; } ColorBlock that = (ColorBlock) obj; if (!PaintUtilities.equal(this.paint, that.paint)) { return false; } return super.equals(obj); } /** * 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); } } Other jfreechart examples (source code examples)Here is a short list of links related to this jfreechart ColorBlock.java source code file: |
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