gdk:popup-layout-shadow-width (layout)

layout -- a gdk:popup-layout instance
left -- an integer with the left shadow width
right -- an integer with the right shadow width
top -- an integer with the top shadow width
bottom -- an integer with the bottom shadow width

The gdk:popup-layout-shadow-width function obtains the shadow widths of the popup layout. The (setf gdk:popup-layout-shadow-width) function sets the shadow width.

The shadow width corresponds to the part of the computed surface size that would consist of the shadow margin surrounding the window, would there be any.

Since 4.2