QHeaderView: ResizeMode suggestion

#include <QtGui>

class TreeWidget : public QTreeWidget
{
    Q_OBJECT
public:
    TreeWidget(QWidget *parent = 0)
        : QTreeWidget(parent)
    {
        setColumnCount(1);
        setRootIsDecorated(true);
        QTreeWidgetItem *item;
        for (int i=0; i<10; ++i) {
            item = new QTreeWidgetItem;
            item->setText(0, QString("Item number %1").arg(i));
            addTopLevelItem(item);
            for (int j=0; j<10; ++j) {
                QTreeWidgetItem *child = new QTreeWidgetItem(item);
                child->setText(0, QString("Child Item number %1").arg(j));

            }
        }
        connect(model(), SIGNAL(dataChanged(QModelIndex, QModelIndex)),
                this, SLOT(fixHeader()));
        connect(model(), SIGNAL(rowsInserted(QModelIndex, int, int)),
                this, SLOT(fixHeader()));
        connect(model(), SIGNAL(rowsRemoved(QModelIndex, int, int)),
                this, SLOT(fixHeader()));
        connect(this, SIGNAL(expanded(QModelIndex)), this, SLOT(fixHeader()));
        connect(this, SIGNAL(collapsed(QModelIndex)), this, SLOT(fixHeader()));


    }
    void resizeEvent(QResizeEvent *e)
    {
        QTreeWidget::resizeEvent(e);
        fixHeader();
    }
    void timerEvent(QTimerEvent *e)
    {
        if (e->timerId() == timer.timerId()) {
            timer.stop();
            const int s = qMax(viewport()->width(), sizeHintForColumn(0));
            header()->resizeSection(0, s);
        } else {
            QTreeWidget::timerEvent(e);
        }
    }

public slots:
    void fixHeader()
    {
        timer.start(10, this);
    }
private:
    QBasicTimer timer;
};

class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0)
        : QMainWindow(parent)
    {
        QSplitter *splitter = new QSplitter(Qt::Horizontal, this);
        setCentralWidget(splitter);
        TreeWidget *tw = new TreeWidget(splitter);
        splitter->addWidget(tw);
        splitter->addWidget(new QTextEdit(this));
    }
public slots:
};

#include "main.moc"

int main(int argc, char **argv)
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}