QBoxLayout

QBoxLayout is a layout manager class in the Qt framework used for arranging widgets in a horizontal or vertical direction. It provides a simple and efficient way to position and size child widgets within a parent widget. QBoxLayout can be used to create rows of widgets or columns of widgets.

To use QBoxLayout, you first create an instance of the class, specifying whether the layout should be horizontal or vertical. Then, you add widgets to the layout using methods like addWidget() or addLayout(). The widgets are automatically arranged in the order they are added. QBoxLayout also supports adding stretchable spaces, which can be used to create flexible layouts that adapt to different window sizes.

Key features of QBoxLayout include the ability to control the alignment of widgets within the layout, set spacing between widgets, and manage the size policies of child widgets. It is a fundamental component for building user interfaces in Qt applications, enabling developers to create organized and responsive layouts. QBoxLayout is particularly useful for arranging toolbars, forms, and other collections of related controls. Its ease of use and flexibility make it a popular choice for many UI design tasks in Qt.