public void set_above_child (bool above_child)
Set whether the event box window is positioned above the windows of its child, as opposed to below it.
If the window is above, all events inside the event box will go to the event box. If the window is below, events in windows of child widgets will first got to that widget, and then to its parents.
The default is to keep the window below the child.
true if the event box window is above its child