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/* FeatureViewer.java
*
* created: Thu Nov 19 1998
*
* This file is part of Artemis
*
* Copyright (C) 1998,1999,2000 Genome Research Limited
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header: //tmp/pathsoft/artemis/uk/ac/sanger/artemis/components/FeatureViewer.java,v 1.1 2004-06-09 09:46:46 tjc Exp $
*/
package uk.ac.sanger.artemis.components;
import uk.ac.sanger.artemis.*;
import java.io.*;
import java.awt.event.*;
/**
* A viewer for Feature objects.
*
* @author Kim Rutherford
* @version $Id: FeatureViewer.java,v 1.1 2004-06-09 09:46:46 tjc Exp $
*
**/
public class FeatureViewer
implements EntryChangeListener, FeatureChangeListener {
/**
* Create a new FeatureViewer object from the given Feature.
**/
public FeatureViewer (Feature view_feature) {
this.view_feature = view_feature;
this.entry = view_feature.getEntry ();
file_viewer = new FileViewer ("Artemis Feature View: " +
view_feature.getIDString ());
readFeature (view_feature);
view_feature.getEntry ().addEntryChangeListener (this);
view_feature.addFeatureChangeListener (this);
file_viewer.addWindowListener (new WindowAdapter () {
public void windowClosed (WindowEvent event) {
stopListening ();
}
});
}
/**
* Remove this object as a feature and entry change listener.
**/
public void stopListening () {
getEntry ().removeEntryChangeListener (this);
getFeature ().removeFeatureChangeListener (this);
}
/**
* Implementation of the EntryChangeListener interface. We listen to
* EntryChange events so we can delete this component if the feature gets
* deleted.
**/
public void entryChanged (EntryChangeEvent event) {
switch (event.getType ()) {
case EntryChangeEvent.FEATURE_DELETED:
if (event.getFeature () == view_feature) {
stopListening ();
file_viewer.dispose ();
}
break;
default:
// do nothing;
break;
}
}
/**
* Implementation of the FeatureChangeListener interface. We need to
* listen to feature change events from the Features in this object so that
* we can keep the display up to date.
* @param event The change event.
**/
public void featureChanged (FeatureChangeEvent event) {
// re-read the information from the feature
readFeature (view_feature);
}
/**
* Read the given Feature into this FeatureViewer object.
**/
public void readFeature (Feature feature) {
try {
file_viewer.clear ();
file_viewer.appendFile (view_feature.toReader ());
} catch (uk.ac.sanger.artemis.io.ReadFormatException e) {
throw new Error ("internal error - unexpected exception: " +
e.getMessage () +
(e.getLineNumber () > 1 ?
" at line " + e.getLineNumber () :
""));
} catch (IOException e) {
throw new Error ("internal error - unexpected exception: " +
e.getMessage ());
}
}
/**
* Return the Feature we are viewing.
**/
public Feature getFeature () {
return view_feature;
}
/**
* Return the Entry that contains the Feature this object is displaying.
**/
private Entry getEntry () {
return entry;
}
/**
* The Feature this object is displaying.
**/
private Feature view_feature;
/**
* The Entry that contains the Feature this object is displaying.
**/
private Entry entry;
/**
* The FileViewer object that is displaying the feature.
**/
private FileViewer file_viewer;
}