public void onRenderComponents(final Row row) {
final Component lastChild = row.getLastChild(); // image button remove
final RowModel model = getModelFromComponent(row);
for (int i = 0; i < DLFilterOperator.MAX_ARITY; ++i) { // remove all
lastChild.getPreviousSibling().setParent(null);
}
for (int i = 0; i < DLFilterOperator.MAX_ARITY; ++i) { // insert all
row.insertBefore(model.getPosition(i + 1), lastChild);
}
LOGGER.debug("Components have been rendered.");
}
public void doListDataChange(ListDataEvent event) {
// when this is called _model is never null
final ListModel _model = _listbox.getModel();
final int newsz = _model.getSize(), oldsz = _listbox.getItemCount();
int min = event.getIndex0(), max = event.getIndex1(), cnt;
switch (event.getType()) {
case ListDataEvent.INTERVAL_ADDED:
cnt = newsz - oldsz;
if (cnt <= 0) throw new UiException("Adding causes a smaller list?");
if ((oldsz <= 0 || cnt > INVALIDATE_THRESHOLD) && !inPagingMold()) _listbox.invalidate();
// Bug 3147518: avoid memory leak
// Also better performance (outer better than remove a lot)
if (min < 0)
if (max < 0) min = 0;
else min = max - cnt + 1;
if (min > oldsz) min = oldsz;
ListitemRenderer renderer = null;
final Component next = min < oldsz ? _listbox.getItemAtIndex(min) : null;
while (--cnt >= 0) {
if (renderer == null) renderer = (ListitemRenderer) getRealRenderer();
_listbox.insertBefore(newUnloadedItem(renderer, min++), next);
}
break;
case ListDataEvent.INTERVAL_REMOVED:
cnt = oldsz - newsz;
if (cnt <= 0) throw new UiException("Removal causes a larger list?");
if (min >= 0) max = min + cnt - 1;
else if (max < 0) max = cnt - 1; // 0 ~ cnt - 1
if (max > oldsz - 1) max = oldsz - 1;
if ((newsz <= 0 || cnt > INVALIDATE_THRESHOLD) && !inPagingMold()) _listbox.invalidate();
// Bug 3147518: avoid memory leak
// Also better performance (outer better than remove a lot)
// detach from end (due to groopfoot issue)
Component comp = _listbox.getItemAtIndex(max);
while (--cnt >= 0) {
Component p = comp.getPreviousSibling();
comp.detach();
comp = p;
}
break;
default: // CONTENTS_CHANGED
syncModel(min, max);
}
}
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);
}
}