+@type: the type of the event (%GDK_SCROLL).
+@window: the window which received the event.
+@send_event: %TRUE if the event was sent explicitly (e.g. using
+<function>XSendEvent</function>).
+@time: the time of the event in milliseconds.
+@x: the x coordinate of the pointer relative to the window.
+@y: the y coordinate of the pointer relative to the window.
+@state: a bit-mask representing the state of the modifier keys (e.g. Control,
+Shift and Alt) and the pointer buttons. See #GdkModifierType.
+@direction: the direction to scroll to (one of %GDK_SCROLL_UP,
+ %GDK_SCROLL_DOWN, %GDK_SCROLL_LEFT and %GDK_SCROLL_RIGHT).
+@device: the device where the event originated.
+@x_root: the x coordinate of the pointer relative to the root of the screen.
+@y_root: the y coordinate of the pointer relative to the root of the screen.