/* The contents of this file are subject to the license and copyright terms
* detailed in the license directory at the root of the source tree (also
* available online at http://fedora-commons.org/license/).
*/
package org.fcrepo.client.objecteditor;
import java.io.IOException;
import java.io.InputStream;
import javax.media.jai.JAI;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import com.sun.media.jai.codec.MemoryCacheSeekableStream;
/**
* Views content of common image formats in a JComponent.
*/
public class ImageContentViewer
extends ContentViewer {
private JLabel m_label;
private JScrollPane m_pane;
private boolean s_registered;
public ImageContentViewer() {
if (!s_registered) {
ContentHandlerFactory.register(this);
s_registered = true;
}
}
/**
* Get the JComponent.
*/
@Override
public JComponent getComponent() {
return m_pane;
}
/**
* Returns a list of content types that this component can handle. This will
* usually be a list of MIME Types, but may also include other notions of
* type known to be understood by the users of ContentHandlerFactory.
*/
@Override
public String[] getTypes() {
return new String[] {"image/gif", "image/jpeg", "image/tiff",
"image/bmp", "image/x-ms-bmp", "image/x-bitmap", "image/png"};
}
/**
* Initializes the handler. This should only be called once per instance,
* and is guaranteed to have been called when this component is provided by
* the ContentHandlerFactory. The viewOnly parameter signals to
* ContentEditor implementations that editing capabilities are not desired
* by the caller.
*/
@Override
public void init(String type, InputStream data, boolean viewOnly)
throws IOException {
setContent(data);
}
/**
* Re-initializes the handler given new input data. The old data can be
* discarded.
*/
@Override
public void setContent(InputStream data) throws IOException {
try {
ImageIcon image =
new ImageIcon(JAI
.create("stream",
new MemoryCacheSeekableStream(data))
.getAsBufferedImage());
if (m_pane == null) {
m_label = new JLabel(image);
m_pane = new JScrollPane(m_label);
} else {
m_label.setIcon(image);
}
} catch (Exception e) {
throw new IOException(e.getMessage());
}
}
}