[SOLVED] Strange interaction of QAbstractItemModel with QSortFilterProxyModel

[h0x0d9]

What is wrong with this an interaction of QAbstractItemModel with QSortFilterProxyModel? On left part of "screen":http://higgs.rghost.ru/48549452/image.png I connected my implementation of QAbstractItemModel and on right part part I did QSortFilterProxyModel.

Upd: git repo: git@bitbucket.org:h0x0d9/myfilterproxymodel.git

View:
@ListsRegisterModel *model = new ListsRegisterModel(this);

QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel(this);
proxyModel->setSourceModel(model);

QTreeView *view = new QTreeView(this);
view->setModel(model);

QTreeView *view2 = new QTreeView(this);
view2->setModel(proxyModel);@

Model:
@class ListsRegisterModel : public QAbstractItemModel
{
Q_OBJECT
public:
explicit ListsRegisterModel(QObject *parent = 0);
~ListsRegisterModel();

QVariant data(const QModelIndex &index, int role) const;
Qt::ItemFlags flags(const QModelIndex &index) const;
QVariant headerData(int section, Qt::Orientation orientation,
                    int role = Qt::DisplayRole) const;
QModelIndex index(int row, int column,
                  const QModelIndex &parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex &index) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
bool setData(const QModelIndex &index, const QVariant &value,
             int role = Qt::CheckStateRole);

private:
enum Columns
{
RamificationColumn,
ListNameColumn = RamificationColumn,
ListSubscriberColumn
};

TreeItem *rootItem;

QMultiMap<QString, QString> parseListsFile&#40;QString path&#41;;
void setupModelData(QMultiMap<QString, QString> lists, TreeItem *parent&#41;;
TreeItem *getItem(const QModelIndex &index&#41; const;

};

ListsRegisterModel::ListsRegisterModel(QObject *parent) :
QAbstractItemModel(parent)
{
QList<QVariant> rootData;
rootData << tr("List") << tr("Subscribers");
rootItem = new TreeItem(rootData);

QMultiMap<QString, QString> listsReg = parseListsFile&#40;"etc/lists.reg"&#41;;
setupModelData(listsReg, rootItem&#41;;

}

QVariant ListsRegisterModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();

TreeItem *item = getItem(index);

switch (role) {
case Qt::DisplayRole:
    if (item->parent() == rootItem) {
        return item->data(index.column());
    }
    else {
        qDebug() << item->data(index.column() - 1);
        return item->data(index.column() - 1);
    }
    break;
case Qt::CheckStateRole:
    if (index.column() == RamificationColumn
            && item->parent() == rootItem) {
        return QVariant(item->checkState());
    }
    break;
default:
    return QVariant();
    break;
}
return QVariant();

}

QModelIndex ListsRegisterModel::index(int row, int column, const QModelIndex &parent) const
{
TreeItem * parentItem;

if (row < 0 || column < 0)
    return QModelIndex();

if (!parent.isValid())
    parentItem = rootItem;
else
    parentItem = getItem(parent);

TreeItem *childItem = parentItem->child(row);

if (childItem)
    return createIndex(row, column, childItem);

return QModelIndex();

}

QModelIndex ListsRegisterModel::parent(const QModelIndex &index) const
{
if (!index.isValid())
return QModelIndex();

TreeItem *childItem = getItem(index);
TreeItem *parentItem = childItem->parent();

if (parentItem == rootItem)
    return QModelIndex();

return createIndex(parentItem->row(), 0, parentItem);

}@

[h0x0d9]

I'm sprinkling ashes upon my head. I defined falsely columnCount() function. The correct version will be this:

@int ListsRegisterModel::columnCount(const QModelIndex &parent) const
{
return LastColumn; // = 2
}@

[SGaist]

Hi and welcome to devnet,

great you found out and shared !

Please update your thread title prepending [solved] so other forum users may know a solution has been found :)