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- /**
- * ========================================
- * JCommon : a free Java report library
- * ========================================
- *
- * Project Info: http://www.jfree.org/jcommon/
- * Project Lead: Thomas Morgner;
- *
- * (C) Copyright 2000-2006, by Object Refinery Limited and Contributors.
- *
- * 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., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307, USA.
- *
- * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
- * in the United States and other countries.]
- *
- * ------------
- * DrawablePanel.java
- * ------------
- * (C) Copyright 2002-2006, by Object Refinery Limited.
- *
- * Original Author: Thomas Morgner;
- * Contributor(s): -;
- *
- * $Id: DrawablePanel.java,v 1.4 2008/09/10 09:25:09 mungady Exp $
- *
- * Changes
- * -------
- *
- *
- */
- package org.jfree.ui;
- import java.awt.Dimension;
- import java.awt.Graphics;
- import java.awt.Graphics2D;
- import java.awt.geom.Rectangle2D;
- import javax.swing.JPanel;
- /**
- * A component, that accepts a drawable and which draws that drawable.
- *
- * @author Thomas Morgner
- */
- public class DrawablePanel extends JPanel
- {
- private Drawable drawable;
- /**
- * Creates a new instance.
- */
- public DrawablePanel()
- {
- setOpaque(false);
- }
- /**
- * Returns the drawable item.
- *
- * @return The drawable item.
- */
- public Drawable getDrawable()
- {
- return this.drawable;
- }
- /**
- * Sets the drawable item.
- *
- * @param drawable the drawable item.
- */
- public void setDrawable(final Drawable drawable)
- {
- this.drawable = drawable;
- revalidate();
- repaint();
- }
- /**
- * If the <code>preferredSize</code> has been set to a non-<code>null</code>
- * value just returns it. If the UI delegate's <code>getPreferredSize</code>
- * method returns a non <code>null</code> value then return that; otherwise
- * defer to the component's layout manager.
- *
- * @return the value of the <code>preferredSize</code> property
- * @see #setPreferredSize
- * @see javax.swing.plaf.ComponentUI
- */
- public Dimension getPreferredSize()
- {
- if (this.drawable instanceof ExtendedDrawable)
- {
- final ExtendedDrawable ed = (ExtendedDrawable) this.drawable;
- return ed.getPreferredSize();
- }
- return super.getPreferredSize();
- }
- /**
- * If the minimum size has been set to a non-<code>null</code> value just
- * returns it. If the UI delegate's <code>getMinimumSize</code> method
- * returns a non-<code>null</code> value then return that; otherwise defer to
- * the component's layout manager.
- *
- * @return the value of the <code>minimumSize</code> property
- * @see #setMinimumSize
- * @see javax.swing.plaf.ComponentUI
- */
- public Dimension getMinimumSize()
- {
- if (this.drawable instanceof ExtendedDrawable)
- {
- final ExtendedDrawable ed = (ExtendedDrawable) this.drawable;
- return ed.getPreferredSize();
- }
- return super.getMinimumSize();
- }
- /**
- * Returns true if this component is completely opaque.
- * <p>
- * An opaque component paints every pixel within its rectangular bounds. A
- * non-opaque component paints only a subset of its pixels or none at all,
- * allowing the pixels underneath it to "show through". Therefore, a
- * component that does not fully paint its pixels provides a degree of
- * transparency.</p>
- * <p>
- * Subclasses that guarantee to always completely paint their contents should
- * override this method and return true.</p>
- *
- * @return true if this component is completely opaque
- * @see #setOpaque
- */
- public boolean isOpaque()
- {
- if (this.drawable == null)
- {
- return false;
- }
- return super.isOpaque();
- }
- /**
- * Calls the UI delegate's paint method, if the UI delegate is
- * non-<code>null</code>. We pass the delegate a copy of the
- * <code>Graphics</code> object to protect the rest of the paint code from
- * irrevocable changes (for example, <code>Graphics.translate</code>).
- * <p>
- * If you override this in a subclass you should not make permanent changes to
- * the passed in <code>Graphics</code>. For example, you should not alter the
- * clip <code>Rectangle</code> or modify the transform. If you need to do
- * these operations you may find it easier to create a new
- * <code>Graphics</code> from the passed in <code>Graphics</code> and
- * manipulate it. Further, if you do not invoker super's implementation you
- * must honor the opaque property, that is if this component is opaque, you
- * must completely fill in the background in a non-opaque color. If you do not
- * honor the opaque property you will likely see visual artifacts.</p>
- * <p>
- * The passed in <code>Graphics</code> object might have a transform other
- * than the identify transform installed on it. In this case, you might get
- * unexpected results if you cumulatively apply another transform.</p>
- *
- * @param g the <code>Graphics</code> object to protect
- * @see #paint
- * @see javax.swing.plaf.ComponentUI
- */
- protected void paintComponent(Graphics g)
- {
- super.paintComponent(g);
- if (this.drawable == null)
- {
- return;
- }
- final Graphics2D g2 = (Graphics2D) g.create
- (0, 0, getWidth(), getHeight());
- this.drawable.draw(g2, new Rectangle2D.Double(0, 0, getWidth(), getHeight()));
- g2.dispose();
- }
- }
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