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Since every window covers the part of its parent it is staying on, all other windows appear to be above the root window. As a result, the root window is visible as the part of the screen that is behind all other windows. In other words, the root window forms the background of the screen. An image can
268:: when the screensaver is activated, this program creates a virtual root window, places it at the top of all other windows, and calls one of its hacks (modules), which finds the virtual root window and draws in it.
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of the real root window to contain a list of the windows that are acting as virtual root windows; the virtual root window that is currently active can be found in the property
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use a virtual background window (which contains the icons, for example) but do not reparent the other windows to this one. The virtual root window is also used by
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in a direct child of the real root window. Technically, many programs use the macros for finding the root windows as redefined by an include file named
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created is contained within it, forming a hierarchy with the root window at the very top. All other windows are either children or descendants of it.
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A possible placement of some windows: 1 is the root window, which covers the whole screen; 2 and 3 are top-level windows; 4 and 5 are subwindows of 2.
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using the virtual root window reparent all windows to it instead of to the real root window. Virtual root windows are mainly used by
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Other clients (beside the window manager) may need to use the virtual root window. The identifier of this window can be found in a
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The properties of the root window are sometimes used as a rudimentary form of inter-client communication means. For example, the
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of the screen by setting it as the background image of the root window. This can be done for example using the
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are properties of the root window that are used for copying selected text from a window to another, and the
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that contains information about virtual root/desktop windows for various window managers
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are also stored, during execution, in a property of the root window.
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window manager displays the root window's name in a status area. The
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The virtual root window is used by the window managers swm,
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window manager specification requires a property named
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137:covers the entire screen surface. Every
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99:June 2024
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