gtk:window-is-maximized (window)

window -- a gtk:window widget

The boolean whether the window is maximized.

Retrieves the current maximized state of the window. Note that since maximization is ultimately handled by the window manager and happens asynchronously to an application request, you should not assume the return value of this function changing immediately, or at all, as an effect of calling the gtk:window-maximize or gtk:window-unmaximize functions.

If the window is not yet mapped, the value returned will whether the initial requested state is maximized.