In practice, the elements of this functionality vary greatly. Every graphical user interface based on a windows metaphor has some form of window management.

They work in conjunction with the underlying graphical system that provides required functionality-support for graphics hardware, pointing devices, and a keyboard-and are often written and created using a widget toolkit.įew window managers are designed with a clear distinction between the windowing system and the window manager. Most window managers are designed to help provide a desktop environment. Under Wayland clients always draw their own window decorations.Ī window manager is system software that controls the placement and appearance of windows within a windowing system in a graphical user interface. Under X11, when the window manager is not running, the window decorations are missing for most windows.

The drawing of the content is the task of the client. The window decoration is either drawn by the window manager (X11) or by the client ( Wayland). Under X, the window manager and the display server are two distinct programs but under Wayland, the function of both is handled by the Wayland compositor. Type of system software Layers of the graphical user interface:

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