DevFaqListenForOpenEvents
How can I be notified when a file is opened?
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.HashSet;
import org.openide.awt.StatusDisplayer;
import org.openide.filesystems.FileChangeAdapter;
import org.openide.filesystems.FileEvent;
import org.openide.filesystems.FileObject;
import org.openide.loaders.DataObject;
import org.openide.windows.OnShowing;
import org.openide.windows.TopComponent;
import org.openide.windows.WindowManager;
@OnShowing
public class Installer implements Runnable {
@Override
public void run() {
WindowManager.getDefault().getRegistry().addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName().equals("opened")) {
HashSet<TopComponent> newHashSet = (HashSet<TopComponent>) evt.getNewValue();
HashSet<TopComponent> oldHashSet = (HashSet<TopComponent>) evt.getOldValue();
for (TopComponent topComponent : newHashSet) {
if (!oldHashSet.contains(topComponent)) {
DataObject dObj = topComponent.getLookup().lookup(DataObject.class);
if (dObj != null) {
FileObject currentFile = dObj.getPrimaryFile();
if (currentFile != null && currentFile.getMIMEType().equals("text/x-java")) {
StatusDisplayer.getDefault().setStatusText("Hurray! "
+ "Opened " + currentFile.getNameExt(), 1);
currentFile.addFileChangeListener(new FileChangeAdapter() {
@Override
public void fileChanged(FileEvent fe) {
StatusDisplayer.getDefault().setStatusText("Hurray! "
+ "Saved " + fe.getFile().getNameExt(), 1);
}
});
}
}
}
}
}
}
});
}
}
Taken from nbdev-mailing list - thanks to Geertjan.
