GdkCrossing
   
       Specifies the crossing mode for GdkEventCrossing.
   
  | Value | Symbolic name | Description | 
|   0 | Gdk::CROSSING_NORMAL | Crossing because of pointer motion. | 
|   1 | Gdk::CROSSING_GRAB | Crossing because a grab is activated. | 
|   2 | Gdk::CROSSING_UNGRAB | Crossing because a grab is deactivated. |