AssetListModel::Iterator AssetListModel::erase( const AssetListModel::Iterator & position )
{
auto index = std::distance( items_.cbegin(), position.iterator() );
signalPreItemsRemoved( index, 1 );
auto it = items_.erase( position.iterator() );
signalPostItemsRemoved( index, 1 );
return it;
}
AssetListModel::Iterator AssetListModel::erase(
const AssetListModel::Iterator & first, const AssetListModel::Iterator & last )
{
auto index = std::distance( items_.cbegin(), first.iterator() );
auto count = std::distance( first.iterator(), last.iterator() );
signalPreItemsRemoved( index, count );
auto it = items_.erase( first.iterator(), last.iterator() );
signalPostItemsRemoved( index, count );
return it;
}
void AssetListModel::resize( size_t newSize )
{
auto oldSize = size();
if (newSize < oldSize)
{
signalPreItemsRemoved( newSize, oldSize - newSize );
items_.resize( newSize );
signalPostItemsRemoved( newSize, oldSize - newSize );
}
else if (newSize > oldSize)
{
signalPreItemsInserted( oldSize, newSize - oldSize );
items_.resize( newSize );
signalPostItemsInserted( oldSize, newSize - oldSize );
}
}
void GenericTreeModel::removeRootItem(GenericTreeItem* item)
{
assert(item != nullptr);
assert(item->model_ == this);
const auto foundItr = std::find(rootItems_.cbegin(), rootItems_.cend(), item);
assert(foundItr != rootItems_.cend());
item->model_ = nullptr;
auto findIter = std::find(rootItems_.begin(), rootItems_.end(), item);
if (findIter == rootItems_.end())
return;
size_t index = std::distance(findIter, rootItems_.begin());
signalPreItemsRemoved(nullptr, index, 1);
rootItems_.erase(foundItr);
signalPostItemsRemoved(nullptr, index, 1);
}
