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JCommon is a free general purpose Java class library that is used in several projects at www.jfree.org, including JFreeChart and JFreeReport.
/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/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.]
*
* ----------------
* PaintSample.java
* ----------------
* (C) Copyright 2000-2004, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: PaintSample.java,v 1.5 2007/11/02 17:50:36 taqua Exp $
*
* Changes (from 26-Oct-2001)
* --------------------------
* 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
* 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
package org.jfree.ui;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Paint;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
/**
* A panel that displays a paint sample.
*
* @author David Gilbert
*/
public class PaintSample extends JComponent {
/** The paint. */
private Paint paint;
/** The preferred size of the component. */
private Dimension preferredSize;
/**
* Standard constructor - builds a paint sample.
*
* @param paint the paint to display.
*/
public PaintSample(final Paint paint) {
this.paint = paint;
this.preferredSize = new Dimension(80, 12);
}
/**
* Returns the current Paint object being displayed in the panel.
*
* @return the paint.
*/
public Paint getPaint() {
return this.paint;
}
/**
* Sets the Paint object being displayed in the panel.
*
* @param paint the paint.
*/
public void setPaint(final Paint paint) {
this.paint = paint;
repaint();
}
/**
* Returns the preferred size of the component.
*
* @return the preferred size.
*/
public Dimension getPreferredSize() {
return this.preferredSize;
}
/**
* Fills the component with the current Paint.
*
* @param g the graphics device.
*/
public void paintComponent(final Graphics g) {
final Graphics2D g2 = (Graphics2D) g;
final Dimension size = getSize();
final Insets insets = getInsets();
final double xx = insets.left;
final double yy = insets.top;
final double ww = size.getWidth() - insets.left - insets.right - 1;
final double hh = size.getHeight() - insets.top - insets.bottom - 1;
final Rectangle2D area = new Rectangle2D.Double(xx, yy, ww, hh);
g2.setPaint(this.paint);
g2.fill(area);
g2.setPaint(Color.black);
g2.draw(area);
}
}