GdkEventCrossing

detail GdkNotifyType detail;: the kind of crossing that happened (GDK_NOTIFY_INFERIOR, GDK_NOTIFY_ANCESTOR, GDK_NOTIFY_VIRTUAL, GDK_NOTIFY_NONLINEAR or GDK_NOTIFY_NONLINEAR_VIRTUAL).
focus bool focus;: TRUE if window is the focus window or an inferior.
mode GdkCrossingMode mode;: the crossing mode (GDK_CROSSING_NORMAL, GDK_CROSSING_GRAB, GDK_CROSSING_UNGRAB, GDK_CROSSING_GTK_GRAB, GDK_CROSSING_GTK_UNGRAB or GDK_CROSSING_STATE_CHANGED). GDK_CROSSING_GTK_GRAB, GDK_CROSSING_GTK_UNGRAB, and GDK_CROSSING_STATE_CHANGED were added in 2.14 and are always synthesized, never native.
sendEvent byte sendEvent;: TRUE if the event was sent explicitly.
state ModifierType state;: a bit-mask representing the state of the modifier keys (e.g. Control, Shift and Alt) and the pointer buttons. See GdkModifierType
subwindow GdkWindow* subwindow;: the window that was entered or left.
time uint time;: the time of the event in milliseconds.
type GdkEventType type;: the type of the event (GDK_ENTER_NOTIFY or GDK_LEAVE_NOTIFY).
window GdkWindow* window;: the window which received the event.
x double x;: the x coordinate of the pointer relative to the window.
xRoot double xRoot;: the x coordinate of the pointer relative to the root of the screen.
y double y;: the y coordinate of the pointer relative to the window.
yRoot double yRoot;: the y coordinate of the pointer relative to the root of the screen.