GdkEventCrossing.detail

the kind of crossing that happened (%GDK_NOTIFY_INFERIOR, %GDK_NOTIFY_ANCESTOR, %GDK_NOTIFY_VIRTUAL, %GDK_NOTIFY_NONLINEAR or %GDK_NOTIFY_NONLINEAR_VIRTUAL).

struct GdkEventCrossing
GdkNotifyType detail;

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