/**
* Builds an list of components that are ordered in the focus order previously set by a user for a
* given form. The form may have changed (components might have been deleted or moved), so we need
* to delete those components from the focus order that don't match the current state of the form.
*/
ArrayList buildStoredFocusList(FormComponent form) {
ArrayList focus_list = new ArrayList();
FocusPolicyMemento memento = form.getFocusPolicy();
if (memento != null) {
Collection fkeys = memento.getFocusPolicyKeys();
Iterator iter = fkeys.iterator();
while (iter.hasNext()) {
FocusKey fkey = (FocusKey) iter.next();
Component comp = fkey.getComponent(form);
if (comp != null) {
focus_list.add(comp);
}
}
}
return focus_list;
}
/** Checks that all focuskeys reference the correct components */
public void validateFocusKeys(FormComponent root, FocusPolicyMemento memento) {
Iterator iter = memento.getFocusPolicyKeys().iterator();
while (iter.hasNext()) {
FocusKey fkey = (FocusKey) iter.next();
Component comp = fkey.getComponent(root);
assert (comp != null);
System.out.print("Focuskey validated: ");
fkey.print();
System.out.println(" comp: " + comp.getClass());
}
}
/**
* @return the focus policy memento that represents the current focus ordering for this manager
*/
public FocusPolicyMemento getFocusPolicyMemento() {
HashSet current_focus_set = new HashSet();
current_focus_set.addAll(m_focus_list);
HashMap focus_key_map = new HashMap();
CompositeFocusKey cfk = new CompositeFocusKey();
/** first build location keys for all components in the the form */
buildFocusKeys(current_focus_set, focus_key_map, m_form, cfk);
FocusPolicyMemento memento = new FocusPolicyMemento();
/** now iterate over the focus list and get the corresponding focus key */
Iterator iter = m_focus_list.iterator();
while (iter.hasNext()) {
Component comp = (Component) iter.next();
FocusKey fkey = (FocusKey) focus_key_map.get(comp);
if (fkey != null) memento.addFocusKey(fkey);
}
return memento;
}