These classes provide automatic geometry (layout) management of widgets.
| QBoxLayout | The QBoxLayout class lines up child widgets horizontally or vertically. |
| QButtonGroup | The QButtonGroup class provides a container to organize groups of button widgets. |
| QGridLayout | The QGridLayout class lays out widgets in a grid. |
| QGroupBox | The QGroupBox widget provides a group box frame with a title. |
| QHBoxLayout | The QHBoxLayout class lines up widgets horizontally. |
| QLayout | The QLayout class is the base class of geometry managers. |
| QLayoutItem | The QLayoutItem class provides an abstract item that a QLayout manipulates. |
| QSizePolicy | The QSizePolicy class is a layout attribute describing horizontal and vertical resizing policy. |
| QSpacerItem | The QSpacerItem class provides blank space in a layout. |
| QStackedLayout | The QStackedLayout class provides a stack of widgets where only one widget is visible at a time. |
| QStackedWidget | The QStackedWidget class provides a stack of widgets where only one widget is visible at a time. |
| QVBoxLayout | The QVBoxLayout class lines up widgets vertically. |
| QWidgetItem | The QWidgetItem class is a layout item that represents a widget. |