public StackTraceTool(Environment env) {
super(new BorderLayout());
this.env = env;
this.runtime = env.getExecutionManager();
this.context = env.getContextManager();
stackModel = new DefaultListModel(); // empty
list = new JList(stackModel);
list.setCellRenderer(new StackFrameRenderer());
JScrollPane listView = new JScrollPane(list);
add(listView);
// Create listener.
StackTraceToolListener listener = new StackTraceToolListener();
context.addContextListener(listener);
list.addListSelectionListener(listener);
// ### remove listeners on exit!
}
