Determine if QTableView has an open editor

Question

Is there any way to determine if a QTableView has an open editor in the current cell? I need to handle the following situation:

• A user double-clicks a cell and edits the data, but leaves the cell in the "edit" state.
• On another part of the UI, an action is taken that changes the selected row of the underlying model.
• Back on my view, I want to determine if the newly selected row is the same as the open row. If not, I need to take an action. (Prompt the user? Commit automatically? Revert?)

I see how to get the current item, and can get the delegate on that item, but I don't see any isEditMode() property I was hoping to find.

Can someone point me in the right direction?

Answer 1

Subclass your delegate so that it includes an accessor that tells you when it's editing:

void MyDelegate::setEditorData ( QWidget * editor, const QModelIndex & index ) const {
    // _isEditing  will have to be mutable because this method is const
    _isEditing = true; 
    QStyledItemDelegate::setEditorData(editor, index);
}

void MyDelegate::setModelData ( QWidget * editor, QAbstractItemModel * model, const QModelIndex & index ) const {
    QStyledItemDelegate::setModelData(editor, model, index);
    _isEditing = false;
}

bool MyDelegate::isEditing() const { return _isEditing; }

Then you can just check the delegate to see what's going on. Alternatively and/or if you don't like the mutable, you can emit signals so you know what state the delegate is in.