diff options
Diffstat (limited to 'libjava/classpath/gnu/javax/activation/viewers/ImageViewer.java')
-rw-r--r-- | libjava/classpath/gnu/javax/activation/viewers/ImageViewer.java | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/activation/viewers/ImageViewer.java b/libjava/classpath/gnu/javax/activation/viewers/ImageViewer.java new file mode 100644 index 000000000..5bddf7311 --- /dev/null +++ b/libjava/classpath/gnu/javax/activation/viewers/ImageViewer.java @@ -0,0 +1,138 @@ +/* ImageViewer.java -- Simple image display component. + Copyright (C) 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.javax.activation.viewers; + +import java.awt.Component; +import java.awt.Dimension; +import java.awt.Image; +import java.awt.Graphics; +import java.awt.MediaTracker; +import java.awt.Toolkit; +import java.io.ByteArrayOutputStream; +import java.io.InputStream; +import java.io.IOException; + +import javax.activation.CommandObject; +import javax.activation.DataHandler; + +/** + * Simple image display component. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + * @version 1.0.2 + */ +public class ImageViewer extends Component + implements CommandObject +{ + + private Image image; + + /** + * Returns the preferred size for this component (the image size). + */ + public Dimension getPreferredSize() + { + Dimension ps = new Dimension(0, 0); + if (image != null) + { + ps.width = image.getWidth(this); + ps.height = image.getHeight(this); + } + return ps; + } + + public void setCommandContext(String verb, DataHandler dh) + throws IOException + { + // Read image into a byte array + InputStream in = dh.getInputStream(); + ByteArrayOutputStream bytes = new ByteArrayOutputStream(); + byte[] buf = new byte[4096]; + for (int len = in.read(buf); len != -1; len = in.read(buf)) + bytes.write(buf, 0, len); + in.close(); + // Create and prepare the image + Toolkit toolkit = getToolkit(); + Image img = toolkit.createImage(bytes.toByteArray()); + try + { + MediaTracker tracker = new MediaTracker(this); + tracker.addImage(img, 0); + tracker.waitForID(0); + } + catch (InterruptedException e) + { + } + toolkit.prepareImage(img, -1, -1, this); + } + + /** + * Image bits arrive. + */ + public boolean imageUpdate(Image image, int flags, int x, int y, + int width, int height) + { + if ((flags & ALLBITS) != 0) + { + this.image = image; + invalidate(); + repaint(); + return false; + } + return ((flags & ERROR) == 0); + } + + /** + * Scale the image into this component's bounds. + */ + public void paint(Graphics g) + { + if (image != null) + { + Dimension is = new Dimension(image.getWidth(this), + image.getHeight(this)); + if (is.width > -1 && is.height > -1) + { + Dimension cs = getSize(); + g.drawImage(image, 0, 0, cs.width, cs.height, + 0, 0, is.width, is.height, this); + } + } + } + +} |