centered

Arguments: window

Returns whether a window was initially centered over the interior of its owner or parent when it was created.

(setf centered) may be called to change the value, though this is useful only for a form in an IDE project, where it indicates whether the running window that is created from the form will be centered. A centered property appears in the inspector for a form (or other window), where it may be set interactively.

When creating a window programmatically, centering is achieved by passing the :centered argument to make-window.

The value may be either nil (the default) for no centering, :on-parent to center over the parent, or any other true value to center over the owner. (The parent and owner of a window are different only when the window is a top-level owned window, in which case the parent is the screen and the owner is the owner window.)

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Created 2010.1.21.