GdkEventExpose

struct GdkEventExpose {
  GdkEventType type;
  GdkWindow* window;
  gint8 send_event;
  GdkRectangle area;
  cairo_region_t* region;
  gint count;
}

Generated when all or part of a window becomes visible and needs to be redrawn.

`type`	The type of the event (`GDK_EXPOSE` or `GDK_DAMAGE`).
`window`	The window which received the event.
`send_event`	`TRUE` if the event was sent explicitly.
`area`	Bounding box of `region`.
`region`	The region that needs to be redrawn.
`count`	The number of contiguous `GDK_EXPOSE` events following this one. The only use for this is “exposure compression”, i.e. handling all contiguous `GDK_EXPOSE` events in one go, though GDK performs some exposure compression so this is not normally needed.