SWT: Differentiating between selection and typing in a combo

Consider the following Java (SWT) code:

private static ComboViewer createViewer(final Shell shell) {
  final ComboViewer v = new ComboViewer(shell, SWT.DROP_DOWN);
  v.setLabelProvider(new LabelProvider());
  v.setContentProvider(new ArrayContentProvider());
  v.setInput(new String[]{"value 1", "value 2"});
  return v;
}

public static void main(final String[] args) {
  Display display = new Display();
  Shell shell = new Shell(display);
  shell.setSize(200, 60); 
  shell.setLayout(new GridLayout());

  final ComboViewer v = createViewer(shell);

  // This wires up the userSelectedSomething method correctly
  v.addSelectionChangedListener(new ISelectionChangedListener() {
    @Override
    public void selectionChanged(final SelectionChangedEvent event) {
      userSelectedSomething();
    }
  });

  shell.open();
  while (!shell.isDisposed()) {
    if (!display.readAndDispatch()) {
      display.sleep();
    }
  }
  display.dispose();
}

public static void userSelectedSomething() {
  // This should be called *only if* the user selected from the drop-down
}

public static void userTypedSomething() {
  // This should be called *only if* the user typed in the combo
}

I want to call the userTypedSomething method only if the user typed into the combo (and not when they selected from the drop-down). What listener should I add to achieve this? Adding a modify listener to the combo viewer with v.getCombo().addModifyListener(...) is no good as this is triggered for both typing and selection from the combo.

Since you want to listen to keyboard input, I would suggest listening to SWT.KeyUp.

This should be a good starting point:

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());

    final Combo combo = new Combo(shell, SWT.NONE);

    combo.add("First");
    combo.add("Second");

    combo.addListener(SWT.Selection, new Listener() {

        @Override
        public void handleEvent(Event arg0) {
            System.out.println("Selected: " + combo.getItem(combo.getSelectionIndex()));
        }
    });

    combo.addListener(SWT.KeyUp, new Listener() {

        @Override
        public void handleEvent(Event arg0) {
            System.out.println("Typed");
        }
    });

    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch()) {
            display.sleep();
        }
    }
    display.dispose();
}