gtk:header-bar-show-close-button (object)

object -- a gtk:header-bar widget
setting -- true to show standard window decorations

Accessor of the show-close-button slot of the gtk:header-bar class. The gtk:header-bar-show-close-button function returns whether the header bar shows the standard window decorations, including Close, Maximize, and Minimize buttons. The (setf gtk:header-bar-show-close-button) function sets whether the header bar shows decorations.