QtWindowFlags

QtWindowFlags is an enumeration that defines different window behaviors and appearances within the Qt framework. These flags are used when creating a new window or modifying the properties of an existing one, typically passed to the constructor or functions like setWindowFlags(). They control aspects such as whether a window has a title bar, whether it can be resized, minimized, or maximized, and its modality.

Commonly used flags include Qt::Widget, which is the base class for all widgets and has no window decorations. Qt::Window, which provides a standard window with a title bar and borders, allowing for resizing and management by the windowing system. Qt::Dialog is similar to Qt::Window but is often used for dialog boxes, which can be modal. Qt::Popup is used for transient windows like tooltips or context menus.

Flags can be combined using the bitwise OR operator (|) to achieve specific combinations of behaviors. For example, a window might be both resizable and have a system menu. Understanding QtWindowFlags is crucial for customizing the user interface and controlling how windows interact with the operating system and the user. The specific appearance and behavior of windows can also be influenced by the underlying windowing system and the Qt style.