final AudioFileDescr displayAFD = doc.getDisplayDescr();
final String newText = ggComment.getText();
final String oldText = (String) displayAFD.getProperty( AudioFileDescr.KEY_COMMENT );
if( !newText.equals( oldText )) {
doc.getUndoManager().addEdit( new EditChangeAudioFileDescr( this, displayAFD,
AudioFileDescr.KEY_COMMENT, newText, getResourceString( "editChangeComment" )).perform() );
}
}
}
});