QHeaderView and autoResizeToContent

[vhptt]

I have a QTableView. And I use following code:

ui->tblCivilianFlightPlan->setModel (mModel);
    ui->tblCivilianFlightPlan->resizeColumnsToContents();
    ui->tblCivilianFlightPlan->horizontalHeader()->setStretchLastSection(true);

ui->tblCivilianFlightPlan->setModel (mModel);
    ui->tblCivilianFlightPlan->resizeColumnsToContents();
    ui->tblCivilianFlightPlan->horizontalHeader()->setStretchLastSection(true);

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Content of header display ok. But I use multi-language for my app, and when I switch language, the content doesn't show completely.
How can I make the header auto resizing to content ?