mirror of git://gcc.gnu.org/git/gcc.git
139 lines
4.2 KiB
Java
139 lines
4.2 KiB
Java
/* ImageViewer.java -- Simple image display component.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.activation.viewers;
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import java.awt.Component;
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import java.awt.Dimension;
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import java.awt.Image;
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import java.awt.Graphics;
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import java.awt.MediaTracker;
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import java.awt.Toolkit;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.io.IOException;
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import javax.activation.CommandObject;
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import javax.activation.DataHandler;
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/**
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* Simple image display component.
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*
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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* @version 1.0.2
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*/
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public class ImageViewer extends Component
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implements CommandObject
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{
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private Image image;
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/**
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* Returns the preferred size for this component (the image size).
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*/
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public Dimension getPreferredSize()
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{
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Dimension ps = new Dimension(0, 0);
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if (image != null)
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{
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ps.width = image.getWidth(this);
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ps.height = image.getHeight(this);
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}
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return ps;
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}
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public void setCommandContext(String verb, DataHandler dh)
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throws IOException
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{
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// Read image into a byte array
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InputStream in = dh.getInputStream();
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ByteArrayOutputStream bytes = new ByteArrayOutputStream();
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byte[] buf = new byte[4096];
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for (int len = in.read(buf); len != -1; len = in.read(buf))
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bytes.write(buf, 0, len);
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in.close();
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// Create and prepare the image
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Toolkit toolkit = getToolkit();
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Image img = toolkit.createImage(bytes.toByteArray());
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try
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{
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MediaTracker tracker = new MediaTracker(this);
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tracker.addImage(img, 0);
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tracker.waitForID(0);
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}
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catch (InterruptedException e)
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{
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}
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toolkit.prepareImage(img, -1, -1, this);
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}
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/**
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* Image bits arrive.
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*/
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public boolean imageUpdate(Image image, int flags, int x, int y,
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int width, int height)
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{
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if ((flags & ALLBITS) != 0)
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{
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this.image = image;
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invalidate();
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repaint();
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return false;
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}
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return ((flags & ERROR) == 0);
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}
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/**
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* Scale the image into this component's bounds.
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*/
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public void paint(Graphics g)
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{
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if (image != null)
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{
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Dimension is = new Dimension(image.getWidth(this),
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image.getHeight(this));
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if (is.width > -1 && is.height > -1)
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{
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Dimension cs = getSize();
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g.drawImage(image, 0, 0, cs.width, cs.height,
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0, 0, is.width, is.height, this);
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}
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}
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}
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}
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