Managing layouts

Qt provides a set of convenient layout management classes to automatically arrange child widgets within another widget to ensure that the UI remains usable. The QLayout class is the base class of all layout managers. You can also create your own layout manager by reimplementing the setGeometry(), sizeHint(), addItem(), itemAt(), takeAt(), and minimumSize() functions. Please note that once the layout manager is deleted, the layout management will also stop.

The following list provides a brief description of the major layout classes:

• QVBoxLayout lines up widgets vertically.
• QHBoxLayout lines up widgets horizontally.
• QGridLayout lays widgets out in a grid.
• QFormLayout manages forms of input widgets and their associated labels.
• QStackedLayout provides a stack of widgets where only one widget is visible at a time.

QLayout uses multiple inheritances by inheriting from QObject and QLayoutItem. The subclasses of QLayout are QBoxLayout, QGridLayout...