on-double-click

This method is called when the user double-clicks on a snip in the buffer. The clicked-on snip and event records are passed to the method.

• (send a-wx:media-pasteboard on-double-click snip event) -> void
      snip : wx:snip% object
      event : wx:mouse-event% object

  If snip accepts events, it is designated as the caret owner and all snips in the buffer are unselected.