public Comboitem newComboitem(Combobox combobox) {
// clone from template
final Comboitem clone = (Comboitem) _template.clone();
// TODO: see if databinder has this kind of Comboitem, if not, add new CollectionListItem
// avoid duplicate id error, will set to new id when render()
// Bug #1962153: Data binding generates duplicate id in some case add "_".
if (clone.getId().length() > 0) {
clone.setId(null);
}
// link cloned component with template
// each Comboitem and and it descendants share the same templatemap
Map<Object, Object> templatemap = new HashMap<Object, Object>(8);
BindingRendererUtil.linkTemplates(clone, _template, templatemap, _binder);
// link this template map to parent templatemap (Combobox in Combobox)
Map parenttemplatemap = (Map) combobox.getAttribute(DataBinder.TEMPLATEMAP);
if (parenttemplatemap != null) {
templatemap.put(DataBinder.TEMPLATEMAP, parenttemplatemap);
}
// kept clone kids somewhere to avoid create too many components in browser
final List<Component> kids = new ArrayList<Component>(clone.getChildren());
clone.setAttribute(KIDS, kids);
clone.getChildren().clear();
return clone;
}
public void render(final Comboitem item, final Object data, final int index) throws Exception {
final Combobox cb = (Combobox) item.getParent();
final ListModel<?> model = cb.getModel();
final int size = model.getSize();
final Template tm = resoloveTemplate(cb, item, data, index, size, "model");
if (tm == null) {
item.setLabel(Objects.toString(data));
item.setValue(data);
} else {
final ForEachStatus iterStatus =
new AbstractForEachStatus() { // provide iteration status in this context
private static final long serialVersionUID = 1L;
public int getIndex() {
return index;
}
public Object getEach() {
return data;
}
public Integer getEnd() {
return size;
}
};
final String var = (String) tm.getParameters().get(EACH_ATTR);
final String varnm = var == null ? EACH_VAR : var; // var is not specified, default to "each"
final String itervar = (String) tm.getParameters().get(STATUS_ATTR);
final String itervarnm =
itervar == null
? (var == null ? EACH_STATUS_VAR : varnm + STATUS_POST_VAR)
: itervar; // provide default value if not specified
// bug 1188, EL when nested var and itervar
Object oldVar = cb.getAttribute(varnm);
Object oldIter = cb.getAttribute(itervarnm);
cb.setAttribute(varnm, data);
cb.setAttribute(itervarnm, iterStatus);
final Component[] items = tm.create(cb, item, null, null);
cb.setAttribute(varnm, oldVar);
cb.setAttribute(itervarnm, oldIter);
if (items.length != 1)
throw new UiException("The model template must have exactly one item, not " + items.length);
final Comboitem nci = (Comboitem) items[0];
nci.setAttribute(BinderImpl.VAR, varnm); // for the converter to get the value
if (model instanceof ListSubModel) {
// ZK-992 wrong item when binding to combbox with submodel implementation
// combobox has a internal model as the submodel,
// I don't have way to access the submodel, and user doesn't has info to notify model[index]
// changed.
// so I set the value directly.
nci.setAttribute(varnm, data);
} else {
addItemReference(
cb, nci, index, varnm); // kept the reference to the data, before ON_BIND_INIT
}
nci.setAttribute(itervarnm, iterStatus);
// add template dependency
addTemplateTracking(cb, nci, data, index, size);
if (nci.getValue() == null) // template might set it
nci.setValue(data);
item.setAttribute("org.zkoss.zul.model.renderAs", nci);
// indicate a new item is created to replace the existent one
item.detach();
// bug #ZK-677: combobox selection is lost after reload model
// binding Comboitem immediately, @see BindUiLifeCycle#afterComponentAttached
Events.sendEvent(new Event(BinderImpl.ON_BIND_INIT, nci));
}
}