gtk:widget, gobject:initially-unowned, gtk:accessible, gtk:buildable, gtk:constraint-target, gobject:object, common-lisp:standard-object, common-lisp:t

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The gtk:window-handle widget is a titlebar area widget. When added into a window, it can be dragged to move the window, and handles right click, double click and middle click as expected of a titlebar. The gtk:window-handle implementation has a single CSS node with the name windowhandle. Until GTK 4.10, the gtk:window-handle implementation uses the :group role of the gtk:accessible-role enumeration. Starting from GTK 4.12, the gtk:window-handle implementation uses the :generic role.