I am using QFileSystemModel to represent the file structure through QTreView. Everything works fine, but I need to add an extra line at some level of the tree. For example, at the moment:
-root
- row1
- row2
- row3
All these lines display folders / files from the file system. I need:
-root
- row1
- row2
- row3
- custom string
Thus, the user string does not represent any data from the file system. I just need to add my data here. I read a lot of material from the Internet and people’s advice on using a proxy model and overriding the functions rowCount (), data () and flags (). I tried to do this (using a class derived from QSortFilterProxyModel), but I never get my string in the data () and flags () functions. It looks like he is taking the score from the original model.
QVariant AddonFilterModel::data (const QModelIndex & index, int role) const { if(role == Qt::DisplayRole && index.row() == FilterModel::rowCount(index)) { return QString("Add-Ons"); } return FilterModel::data(index, role); } Qt::ItemFlags AddonFilterModel::flags(const QModelIndex & index) const { if (!index.isValid()) return 0; if (index.row() == FilterModel::rowCount(index)) { return Qt::ItemIsEnabled | Qt::ItemIsSelectable; } return FilterModel::flags(index); } int AddonFilterModel::rowCount(const QModelIndex &parent) const { int count = FilterModel::rowCount(parent); if(parent == this->getRootIndex()) { return count+1; } return count; }
Using a class derived from QAbstractProxyModel is not acceptable since I need the filtering functions of QSortFilterProxyModel ().
I also tried to override rowCount () QFileSystemModel to make changes directly to the model, but I get an "array out of range" error from QT code.
I tried the insertRow () method, but it does not work. I think because QFileSystemModel is read-only.
Has anyone encountered this problem? Any ideas?
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