gobject:object, common-lisp:standard-object, common-lisp:t

None

The gdk:drag-surface interface is an interface for surfaces used during DND.

The "compute-size" signal

lambda (surface size)    :run-last      

surface

The gdk:drag-surface object.

size

The gdk:drag-surface-size instance with the size of the drag surface.

Emitted when the size for the surface needs to be computed, when it is present. This signal will normally be emitted during the native surface layout cycle when the surface size needs to be recomputed. It is the responsibility of the drag surface user to handle this signal and compute the desired size of the surface, storing the computed size in the gdk:drag-surface-size instance that is passed to the signal handler, using the gdk:drag-surface-size-set-size function. Failing to set a size so will result in an arbitrary size being used as a result. Since 4.12