Qt: "Expanding" doesn't work inside a layout

Question

My purpose is to create a scrollable control with a QVBoxLayout inside of it that has various controls (say buttons) on it. That control is put on a *.ui form. In the constructor for that control I write the following code:

    MyScrollArea::MyScrollArea(QWidget *parent) :
        QScrollArea(parent)
    {
        // create the scrollable container

        this->container = new QWidget();  // container widget member
        this->container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        this->container->setContentsMargins(QMargins(0,0,0,0));

        this->content = new QVBoxLayout(); // layout member
        this->content->setMargin(0);
        this->content->setSpacing(0);

        for (int i=0; i<100; i++)
        {
            QPushButton * widget = new QPushButton();
            widget->setText("button");
            widget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
            this->content->addWidget(widget);
        }

        this->container->setLayout(this->content);
        this->content->layout();

        this->setWidget(this->container);
   }

My problem: the buttons have a fixed size and do not expand horizontally. they have a fixed size. i'd like them to expand horizontally to fill the row they're in. How can I get them expanding horizontally across their parent container?

Answer 1

Try calling this->setWidgetResizable(true);