• Hi,

    I am new to Qt programming, so this might be a stupid question, but I simply cannot get it to work.

    I have a QTableSubview which contains data from a custom model derived from QAbstractTableModel. The data in the last column might be empty or contain a text with (possibly multiple) line feeds.

    When I try to use resizeRowsToContents it seems only the first column of every row is considered for the new row height, meaning I always get a one-text-line-high row.

    I created a short example (using QtCreator's Gui Application) showing the problem.

    The Model:
    class MyModel : public QAbstractTableModel
    int rowCount (const QModelIndex& /* parent / = QModelIndex()) const {return 3;}
    int columnCount(const QModelIndex& /
    parent */ = QModelIndex()) const {return 5;}

    QVariant data (const QModelIndex& index, int role = Qt::DisplayRole) const
        if (!index.isValid() || role != Qt::DisplayRole)
            return QVariant();
        if (index.row() > index.column())
            return QVariant("One line");
        else if (index.row() == index.column())
            return QVariant("Two\nlines");
            return QVariant("Three\nlines\nhere");


    In the Dialog's constructor:
    MyModel* aModel = new MyModel();

    // Create the table for the contents
    QTableView* aTableView = new QTableView(this);
    QDialogButtonBox* aButtonBox = new QDialogButtonBox(Qt::Vertical);
    connect(aButtonBox, SIGNAL(accepted()), this, SLOT(accept()));
    QHBoxLayout* aMainLayout = new QHBoxLayout();


    What I would expect is, that all rows are high enough to show three lines of text, what I get is a first row, that shows two lines of text and two more lines that show only one line.

    Would you be able to help me out on this?

    Thanks in advance,

  • I have a similar problem with row heights not being adjusted properly. I have set a timer at 1Hz to call resizeRowToContents(index) or resizeRowsToContents() periodically and this works. If you find how to solve your problem, I would be interested to know.

  • I guess you are just supposed to call resizeRowsToContents() every time you change the item height? Can anyone confirm that this is correct?

  • resizeRowsToContents does it one time.
    If you want to do it automatically, you have to do:


    written from brain, no check done

  • Gerolf that worked perfectly for me thanks!

    does anyone know if its possible to keep the text in multiple lines when editing it? When I double click a cell to edit it the text all goes into 1 line so some of the text isn't visible or the edit box expands over the cells to the right. Its not a big deal if this isn't do able or if it is really complicated though.

  • By default, a QLineEdit is used as the editor for an item view for QStrings. You'll have to convince the item view to use a QTextEdit instead. There are multiple ways to do that, but one is to provide your own [[doc:QItemDelegateFactory]] to the delate that handles your view.

  • Perfect,
    [quote author="Gerolf" date="1337851944"]resizeRowsToContents does it one time.
    If you want to do it automatically, you have to do:


    written from brain, no check done[/quote]

    works for me as well when my QSQlQueryModel updates !
    I use it together with pView->horizontalHeader()->setResizeMode(QHeaderView::ResizeToContents); to resize my columns automatically as well.

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