/**
* Retrieves the children available at client with more control.
*
* <p>Derived class shall override this method rather than {@link #getAvailableAtClient()}.
*
* @param itemOnly whether to return only {@link Listitem} and derives.
* @since 5.0.10
*/
protected Set<? extends Component> getAvailableAtClient(boolean itemOnly) {
if (!isCropper()) return null;
final Paginal pgi = _listbox.getPaginal();
int pgsz = pgi.getPageSize();
int ofs = pgi.getActivePage() * pgsz;
return getAvailableAtClient(ofs, pgsz, itemOnly);
}
public Set getAvailableAtClient() {
if (!isCropper()) return null;
final Paginal pgi = _listbox.getPaginal();
int pgsz = pgi.getPageSize();
int ofs = pgi.getActivePage() * pgsz;
return getAvailableAtClient(ofs, pgsz);
}
private void syncModel0(int offset, int limit) {
int min = offset;
int max = offset + limit - 1;
final ListModel _model = _listbox.getModel();
final int newsz = _model.getSize();
final int oldsz = _listbox.getItemCount();
final Paginal _pgi = _listbox.getPaginal();
final boolean inPaging = inPagingMold();
final boolean shallInvalidated = // Bug 3147518: avoid memory leak
(min < 0 || min == 0) && (max < 0 || max >= newsz || max >= oldsz);
int newcnt = newsz - oldsz;
int atg = _pgi != null ? _listbox.getActivePage() : 0;
ListitemRenderer renderer = null;
Component next = null;
if (oldsz > 0) {
if (min < 0) min = 0;
else if (min > oldsz - 1) min = oldsz - 1;
if (max < 0) max = oldsz - 1;
else if (max > oldsz - 1) max = oldsz - 1;
if (min > max) {
int t = min;
min = max;
max = t;
}
int cnt = max - min + 1; // # of affected
if (_model instanceof GroupsListModel) {
// detach all from end to front since groupfoot
// must be detached before group
newcnt += cnt; // add affected later
if ((shallInvalidated || newcnt > INVALIDATE_THRESHOLD) && !inPaging) _listbox.invalidate();
// Bug 3147518: avoid memory leak
// Also better performance (outer better than remove a lot)
Component comp = _listbox.getItemAtIndex(max);
next = comp.getNextSibling();
while (--cnt >= 0) {
Component p = comp.getPreviousSibling();
comp.detach();
comp = p;
}
} else { // ListModel
int addcnt = 0;
Component item = _listbox.getItemAtIndex(min);
while (--cnt >= 0) {
next = item.getNextSibling();
if (cnt < -newcnt) { // if shrink, -newcnt > 0
item.detach(); // remove extra
} else if (((Listitem) item).isLoaded()) {
if (renderer == null) renderer = (ListitemRenderer) getRealRenderer();
item.detach(); // always detach
_listbox.insertBefore(newUnloadedItem(renderer, min), next);
++addcnt;
}
++min;
item = next; // B2100338.,next item could be Paging, don't use Listitem directly
}
if ((shallInvalidated
|| addcnt > INVALIDATE_THRESHOLD
|| addcnt + newcnt > INVALIDATE_THRESHOLD)
&& !inPagingMold()) _listbox.invalidate();
// Bug 3147518: avoid memory leak
// Also better performance (outer better than remove a lot)
}
} else {
min = 0;
}
for (; --newcnt >= 0; ++min) {
if (renderer == null) renderer = (ListitemRenderer) getRealRenderer();
_listbox.insertBefore(newUnloadedItem(renderer, min), next);
}
if (_pgi != null) {
if (atg >= _pgi.getPageCount()) atg = _pgi.getPageCount() - 1;
_pgi.setActivePage(atg);
}
}