These classes are used to organize and group GUI primitives into more complex applications or dialogs.
| Q3HBox | Horizontal geometry management for its child widgets |
| Q3VBox | Vertical geometry management of its child widgets |
| QButtonGroup | Container to organize groups of button widgets |
| QGroupBox | Group box frame with a title |
| QSplitter | Implements a splitter widget |
| QSplitterHandle | Handle functionality of the splitter |
| QStackedWidget | Stack of widgets where only one widget is visible at a time |
| QTabWidget | Stack of tabbed widgets |
