gtk:window-maximized (object)

object -- a gtk:window widget
maximized -- a boolean whether the window is maximized

Accessor of the maximized slot of the gtk:window class. Setting this property is the equivalent of calling the gtk:window-maximize or gtk:window-unmaximize functions. Either operation is asynchronous, which means you will need to connect to the "notify" signal in order to know whether the operation was successful.