gdk:window-move-region (window region dx dy)

window -- a gdk:window object
region -- a cairo:region-t to move
dx -- an integer with the amount to move in the x direction
dy -- an integer with the amount to move in the y direction

Move the part of window indicated by region by dy pixels in the y direction and dx pixels in the x direction. The portions of region that not covered by the new position of region are invalidated.

Child windows are not moved.