using QSizePolicy to set size according to content size

[DrageFabeldyr]

i'm trying to make start/pause menu over the game screen
it has different text before the game starts and during the pause so i want to change its size depends on situation
my code is:

    QWidget *menu;
    QVector <QLabel*> menu_cursor_lines;
    QVector <QLabel*> menu_items_lines;
    QHBoxLayout *menu_layout;
    QVBoxLayout *menu_items_layout;
    QVBoxLayout *menu_cursor_layout;
    int menu_lines = 3;

********************************************************

    menu = new QWidget(grview);
    //menu->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

    for (int i = 0; i < menu_lines; i++)
    {
        QLabel *menu_cursor_line = new QLabel;
        menu_cursor_line->setFont(f);
        //menu_cursor_line->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        menu_cursor_lines.append(menu_cursor_line);
        QLabel *menu_item_line = new QLabel;
        menu_item_line->setFont(f);
        //menu_item_line->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        menu_items_lines.append(menu_item_line);
    }

    for (int i = 0; i < menu_lines; i++)
    {
        menu_cursor_lines[i]->setText("");
        //menu_cursor_lines[i]->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        //menu_items_lines[i]->setText("                                             ");
        menu_items_lines[i]->setText("");
        //menu_items_lines[i]->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    }
    menu_cursor_lines[0]->setText("➜");

    menu_cursor_layout = new QVBoxLayout;
    menu_items_layout = new QVBoxLayout;
    menu_layout = new QHBoxLayout;

    menu_cursor_layout->setSpacing(20);
    for (int i = 0; i < menu_cursor_lines.size(); i++)
        menu_cursor_layout->addWidget(menu_cursor_lines[i]);
    menu_items_layout->setSpacing(20);
    for (int i = 0; i < menu_items_lines.size(); i++)
        menu_items_layout->addWidget(menu_items_lines[i]);
    menu_layout->addLayout(menu_cursor_layout);
    menu_layout->addLayout(menu_items_layout);
    menu->setLayout(menu_layout);
    menu->setStyleSheet("background-color: Grey;");

commented SetSizePolicies is where i've tried them
i've tried all possible flags and result was always the same - see pictures

so is it possible to do this using QSizePolicy or not and if it is so how to do it?

[jsulm]

@DrageFabeldyr Isn't the menu resized automatically if text length changes?

[DrageFabeldyr]

@jsulm no, as you see on pictures doesn't matter what text is written the size is minimal
and as i understand it uses this text to set size:

    for (int i = 0; i < menu_lines; i++)
    {
        menu_cursor_lines[i]->setText("");
        menu_items_lines[i]->setText("");
    }
    menu_cursor_lines[0]->setText("➜");

so as you see from pictures the size is set with the first SetText mention and then doesn't change

only solution i've found is to write it this way:

    for (int i = 0; i < menu_lines; i++)
    {
        menu_cursor_lines[i]->setText("");
        menu_items_lines[i]->setText("                                             ");
    }

and now it's ok with the game start:

but not ok with pause (it's too large):