private void deactivate() {
if (fKeyListener != null) {
Control control = fNavigable.getControl();
if (!control.isDisposed()) control.removeKeyListener(fKeyListener);
fKeyListener = null;
}
}
private FocusHandler(Navigable navigable) {
fIterator = new JavaWordIterator();
fNavigable = navigable;
Control control = navigable.getControl();
control.addFocusListener(this);
if (control.isFocusControl()) activate();
control.addDisposeListener(
new DisposeListener() {
public void widgetDisposed(DisposeEvent e) {
deactivate();
}
});
}
private void activate() {
fNavigable.getControl().addKeyListener(getKeyListener());
}