on-insert

Called before a snip is inserted from the buffer. If the return value is #f, then the insert will be aborted. Otherwise, after-insertis guaranteed to be called after the insert has completed.

• (send a-wx:media-pasteboard on-insert snip before x y) -> boolean
      snip : wx:snip% object
      before : wx:snip% object or null
      x : inexact real
      y : inexact real