void
BOutlineListView::SortItemsUnder(BListItem* underItem, bool oneLevelOnly,
int (*compareFunc)(const BListItem* a, const BListItem* b))
{
// This method is quite complicated: basically, it creates a real tree
// from the items of the full list, sorts them as needed, and then
// populates the entries back into the full and display lists
int32 firstIndex = FullListIndexOf(underItem) + 1;
int32 lastIndex = firstIndex;
BList* tree = _BuildTree(underItem, lastIndex);
_SortTree(tree, oneLevelOnly, compareFunc);
// Populate to the full list
_PopulateTree(tree, fFullList, firstIndex, false);
if (underItem == NULL
|| (underItem->IsItemVisible() && underItem->IsExpanded())) {
// Populate to BListView's list
firstIndex = fList.IndexOf(underItem) + 1;
lastIndex = firstIndex;
_PopulateTree(tree, fList, lastIndex, true);
if (fFirstSelected != -1) {
// update selection hints
fFirstSelected = _CalcFirstSelected(0);
fLastSelected = _CalcLastSelected(CountItems());
}
// only invalidate what may have changed
_RecalcItemTops(firstIndex);
BRect top = ItemFrame(firstIndex);
BRect bottom = ItemFrame(lastIndex - 1);
BRect update(top.left, top.top, bottom.right, bottom.bottom);
Invalidate(update);
}
_DestructTree(tree);
}
bool
BListView::_DeselectAll(int32 exceptFrom, int32 exceptTo)
{
if (fFirstSelected == -1)
return false;
BAutolock locker(Window());
if (Window() && !locker.IsLocked())
return false;
bool changed = false;
for (int32 index = fFirstSelected; index <= fLastSelected; index++) {
// don't deselect the items we shouldn't deselect
if (exceptFrom != -1 && exceptFrom <= index && exceptTo >= index)
continue;
BListItem *item = ItemAt(index);
if (item && item->IsSelected()) {
item->Deselect();
InvalidateItem(index);
changed = true;
}
}
if (!changed)
return false;
if (exceptFrom != -1) {
fFirstSelected = _CalcFirstSelected(exceptFrom);
fLastSelected = _CalcLastSelected(exceptTo);
} else
fFirstSelected = fLastSelected = -1;
return true;
}
bool
BListView::_Deselect(int32 index)
{
if (index < 0 || index >= CountItems())
return false;
BWindow *window = Window();
BAutolock locker(window);
if (window && !locker.IsLocked())
return false;
BListItem *item = ItemAt(index);
if (item && item->IsSelected()) {
BRect frame(ItemFrame(index));
BRect bounds(Bounds());
item->Deselect();
if (fFirstSelected == index && fLastSelected == index) {
fFirstSelected = -1;
fLastSelected = -1;
} else {
if (fFirstSelected == index)
fFirstSelected = _CalcFirstSelected(index);
if (fLastSelected == index)
fLastSelected = _CalcLastSelected(index);
}
if (window && bounds.Intersects(frame))
DrawItem(ItemAt(index), frame, true);
}
return true;
}