GdkEventFocus

struct GdkEventFocus {
  GdkEventType type;
  GdkWindow* window;
  gint8 send_event;
  gint16 in;
}

Describes a change of keyboard focus.

`type`	The type of the event (`GDK_FOCUS_CHANGE`).
`window`	The window which received the event.
`send_event`	`TRUE` if the event was sent explicitly.
`in`	`TRUE` if the window has gained the keyboard focus, `FALSE` if it has lost the focus.