The actual implementation shouldn't be too bad - most of this comes down to design decisions. Unfortunately it's impossible to drag something outside of a scrollable. It may be possible to resolve this using jQuery UI's appendTo option:
http://api.jqueryui.com/sortable/#option-appendTo
The actual implementation shouldn't be too bad - most of this comes down to design decisions. Unfortunately it's impossible to drag something outside of a scrollable. It may be possible to resolve this using jQuery UI's appendTo option: http://api.jqueryui.com/sortable/#option-appendTo