QHBoxLayout Class | Qt Widgets 5.12.4

Qt 5.12 | Qt Widgets | C++ Classes | QHBoxLayout

Qt 5.12.4 Reference Documentation

# QHBoxLayout Class

The QHBoxLayout class lines up widgets horizontally. More...

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

- List of all members, including inherited members
- Obsolete members

## Public Functions

| QHBoxLayout()
| QHBoxLayout(QWidget *parent)
virtual | ~QHBoxLayout()

- 33 public functions inherited from QBoxLayout
- 37 public functions inherited from QLayout
- 31 public functions inherited from QObject
- 17 public functions inherited from QLayoutItem

## Static Public Members

const QMetaObject | staticMetaObject

- 1 static public member inherited from QLayout
- 9 static public members inherited from QObject

### Additional Inherited Members

- 2 properties inherited from QLayout
- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 2 signals inherited from QObject
- 4 protected functions inherited from QLayout
- 9 protected functions inherited from QObject

## Detailed Description

The QHBoxLayout class lines up widgets horizontally.

This class is used to construct horizontal 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");

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

          window->setLayout(layout);
          window->show();

First, we create the widgets we want in the layout. Then, we create the QHBoxLayout object and add the widgets into the layout. Finally, we call QWidget::setLayout() to install the QHBoxLayout object onto the widget. At that point, the widgets in the layout are reparented to have `window` as their parent.

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

## Member Function Documentation

### QHBoxLayout::QHBoxLayout()

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

### QHBoxLayout::QHBoxLayout(QWidget *parent)

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

### `[virtual]` QHBoxLayout::~QHBoxLayout()

Destroys this box layout.

The layout's widgets aren't destroyed.