QVBoxLayout Class

The QVBoxLayout class lines up widgets vertically. More...

Header: #include <QVBoxLayout>
qmake: QT += widgets
Inherits: QBoxLayout

Public Functions

QVBoxLayout(QWidget *parent)
QVBoxLayout()
virtual ~QVBoxLayout()

Detailed Description

This class is used to construct vertical box layout objects. See QBoxLayout for details.

The simplest use of the class is like this:

    QWidget *window = new QWidget;
    QPushButton *button1 = new QPushButton("One");
    QPushButton *button2 = new QPushButton("Two");
    QPushButton *button3 = new QPushButton("Three");
    QPushButton *button4 = new QPushButton("Four");
    QPushButton *button5 = new QPushButton("Five");

    QVBoxLayout *layout = new QVBoxLayout(window);
    layout->addWidget(button1);
    layout->addWidget(button2);
    layout->addWidget(button3);
    layout->addWidget(button4);
    layout->addWidget(button5);

    window->show();

First, we create the widgets we want to add to the layout. Then, we create the QVBoxLayout object, setting window as parent by passing it in the constructor; next we add the widgets to the layout. window will be the parent of the widgets that are added to the layout.

If you don't pass parent window in the constrcutor, you can at a later point use QWidget::setLayout() to install the QVBoxLayout object onto window. At that point, the widgets in the layout are reparented to have window as their parent.

Horizontal box layout with five child widgets

See also QHBoxLayout, QGridLayout, QStackedLayout, Layout Management, and Basic Layouts Example.

Member Function Documentation

QVBoxLayout::QVBoxLayout(QWidget *parent)

Constructs a new top-level vertical box with parent parent.

The layout is set directly as the top-level layout for parent. There can be only one top-level layout for a widget. It is returned by QWidget::layout().

See also QWidget::setLayout().

QVBoxLayout::QVBoxLayout()

Constructs a new vertical box. You must add it to another layout.

[virtual] QVBoxLayout::~QVBoxLayout()

Destroys this box layout.

The layout's widgets aren't destroyed.

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