/** Sorts the items. If with group, each group is sorted independently. */
@SuppressWarnings("unchecked")
private static void sort0(Listbox box, Comparator cmpr) {
if (box.hasGroup())
for (Listgroup g : box.getGroups()) {
int index = g.getIndex() + 1;
Components.sort(box.getItems(), index, index + g.getItemCount(), cmpr);
}
else Components.sort(box.getItems(), cmpr);
}
/* returns the value of the first item in the listbox, if any */
private String getFirstListboxItem() {
Option[] items = (Option[]) lbxItems.getItems();
if ((items != null) && items.length > 0) {
Option item = items[0];
if (item != null) return (String) item.getValue();
}
return null;
}
/**
* Ungroups and sorts the items ({@link Listitem}) based on the ascending. If the corresponding
* comparator is not set, it returns false and does nothing.
*
* @param ascending whether to use {@link #getSortAscending}. If the corresponding comparator is
* not set, it returns false and does nothing.
* @since 6.5.0
*/
public void ungroup(boolean ascending) {
final Comparator<?> cmpr = ascending ? _sortAsc : _sortDsc;
if (cmpr != null) {
final Listbox listbox = getListbox();
if (listbox.getModel() == null) {
// comparator might be zscript
Scopes.beforeInterpret(this);
try {
final List<Listitem> items = listbox.getItems();
if (listbox.hasGroup()) {
for (Listgroup group : new ArrayList<Listgroup>(listbox.getGroups()))
group.detach(); // Listgroupfoot is removed
// automatically, if any.
}
Comparator<?> cmprx;
if (cmpr instanceof GroupComparator) {
cmprx = new GroupToComparator((GroupComparator) cmpr);
} else {
cmprx = cmpr;
}
final List<Listitem> children = new LinkedList<Listitem>(items);
items.clear();
sortCollection(children, cmprx);
for (Component c : children) listbox.appendChild(c);
} finally {
Scopes.afterInterpret();
}
}
fixDirection(listbox, ascending);
// sometimes the items at client side are out of date
listbox.invalidate();
}
}
/**
* Groups and sorts the items ({@link Listitem}) based on {@link #getSortAscending}. If the
* corresponding comparator is not set, it returns false and does nothing.
*
* @param ascending whether to use {@link #getSortAscending}. If the corresponding comparator is
* not set, it returns false and does nothing.
* @return whether the rows are grouped.
* @since 6.5.0
*/
public boolean group(boolean ascending) {
final String dir = getSortDirection();
if (ascending) {
if ("ascending".equals(dir)) return false;
} else {
if ("descending".equals(dir)) return false;
}
final Comparator<?> cmpr = ascending ? _sortAsc : _sortDsc;
if (cmpr == null) return false;
final Listbox listbox = getListbox();
if (listbox == null) return false;
// comparator might be zscript
Scopes.beforeInterpret(this);
try {
final ListModel model = listbox.getModel();
int index = listbox.getListhead().getChildren().indexOf(this);
if (model != null) { // live data
if (!(model instanceof GroupsSortableModel))
throw new UiException(
GroupsSortableModel.class + " must be implemented in " + model.getClass().getName());
groupGroupsModel((GroupsSortableModel) model, cmpr, ascending, index);
} else { // not live data
final List<Listitem> items = listbox.getItems();
if (items.isEmpty()) return false; // Avoid listbox with null group
if (listbox.hasGroup()) {
for (Listgroup group : new ArrayList<Listgroup>(listbox.getGroups()))
group.detach(); // Groupfoot is removed automatically, if any.
}
Comparator<?> cmprx;
if (cmpr instanceof GroupComparator) {
cmprx = new GroupToComparator((GroupComparator) cmpr);
} else {
cmprx = cmpr;
}
final List<Listitem> children = new LinkedList<Listitem>(items);
items.clear();
sortCollection(children, cmprx);
Listitem previous = null;
for (Listitem item : children) {
if (previous == null || compare(cmprx, previous, item) != 0) {
// new group
final List<Listcell> cells = item.getChildren();
if (cells.size() < index)
throw new IndexOutOfBoundsException("Index: " + index + " but size: " + cells.size());
Listgroup group;
Listcell cell = cells.get(index);
if (cell.getLabel() != null) {
group = new Listgroup(cell.getLabel());
} else {
Component cc = cell.getFirstChild();
if (cc instanceof Label) {
String val = ((Label) cc).getValue();
group = new Listgroup(val);
} else {
group = new Listgroup(Messages.get(MZul.GRID_OTHER));
}
}
listbox.appendChild(group);
}
listbox.appendChild(item);
previous = item;
}
if (cmprx != cmpr) sort0(listbox, cmpr); // need to sort each group
}
} finally {
Scopes.afterInterpret();
}
fixDirection(listbox, ascending);
// sometimes the items at client side are out of date
listbox.invalidate();
return true;
}
