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;
}