QModelIndex FlatProxyModel::mapToSource(const QModelIndex &proxyIndex) const
{
if (!proxyIndex.isValid())
return QModelIndex();
Q_ASSERT(proxyIndex.model() == this);
Q_ASSERT(_rootSourceItem);
int row = proxyIndex.row();
QModelIndex sourceParent;
SourceItem *sourceItem = _rootSourceItem->findChild(row);
while (sourceItem) {
if (sourceItem->pos() == row) {
return sourceModel()->index(sourceItem->sourceRow(), proxyIndex.column(), sourceParent);
}
else {
sourceParent = sourceModel()->index(sourceItem->sourceRow(), 0, sourceParent);
sourceItem = sourceItem->findChild(row);
}
}
qWarning() << "FlatProxyModel::mapToSource(): couldn't find source index for" << proxyIndex;
Q_ASSERT(false);
return QModelIndex(); // make compilers happy :)
}
QModelIndex FlatProxyModel::index(int row, int column, const QModelIndex &parent) const
{
if (parent.isValid()) {
qWarning() << "FlatProxyModel::index() called with valid parent:" << parent;
return QModelIndex();
}
if (!_rootSourceItem) {
qWarning() << "FlatProxyModel::index() while model has no root Item";
return QModelIndex();
}
SourceItem *item = _rootSourceItem;
while (item->pos() != row) {
item = item->findChild(row);
if (!item) {
qWarning() << "FlatProxyModel::index() no such row:" << row;
return QModelIndex();
}
}
Q_ASSERT(item->pos() == row);
return createIndex(row, column, item);
}