QStackedWidget

QStackedWidget is a widget provided by the Qt framework, part of the QtWidgets module. It is a stack of widgets where only one widget is visible at a time. This class is useful for creating multi-page dialogs or wizards, where each page is a separate widget.

QStackedWidget manages a stack of widgets and provides methods to switch between them. The current widget can be set using the setCurrentIndex() or setCurrentWidget() methods, and the index of the current widget can be retrieved using the currentIndex() method. The widget() method returns the widget at a specified index, and the addWidget() method adds a new widget to the stack.

One of the key features of QStackedWidget is its ability to animate the transition between widgets. This can be enabled using the setStackingMode() method with the QStackedWidget::StackAll argument, which allows all widgets to be visible at once, and the current widget to be animated to the top. The animation can be customized using the setTransitionAnimation() method.

QStackedWidget also supports keyboard navigation. The next() and previous() methods can be used to switch to the next or previous widget in the stack, and the setFocusPolicy() method can be used to set the focus policy for the widget.

QStackedWidget is a subclass of QFrame, and it inherits all the properties and methods of QFrame. It is typically used in conjunction with other Qt widgets, such as QPushButton, QLabel, and QLineEdit, to create complex user interfaces.