C++ (Cpp) QModelIndexList::cbegin示例

void
PlaylistModel::removeSelectedItem()
{
    QModelIndexList list = slct->selectedRows();
    if (list.empty()) return;

    int c = 0;
    for (auto iter = list.cbegin();
            iter != list.cend(); ++iter)
    {
        int row = (*iter).row();
        if (row < img_index) c++;
        delete files[row];
        files[row] = nullptr;
    }

    bool contain = (files[currentIndex(0)] == nullptr ||
        (countShowImages() > 1 && files[currentIndex(1)] == nullptr));

    for (int i = 0; i < files.count(); )
    {
        if (files[i] == nullptr)
        {
            beginRemoveRows(QModelIndex(), i, i);
            files.remove(i);
            endRemoveRows();
        }
        else
        {
            i++;
        }
    }

    if (empty())
    {
        dataChangeNotice(-1, 0);
        showImages();
    }
    else
    {
        dataChangeNotice(img_index - c, countShowImages());
        if (contain) showImages();
    }
    emit changePlaylistStatus();
}