gtk:window-is-active (object)

object -- a gtk:window widget
active -- a boolean whether the window is part of the current active window

Accessor of the is-active slot of the gtk:window class. That is, the toplevel window receiving keystrokes. The return value is true if the window is active toplevel itself, but also if it is, say, a gtk:plug widget embedded in the active toplevel. You might use this function if you wanted to draw a widget differently in an active window from a widget in an inactive window. See the gtk:window-has-toplevel-focus function.