+class Przyporzadkuj extends Excercise
+ is_multiple: ->
+ for qp in $(".question-piece", @element)
+ if $(qp).data('solution').split(/[ ,]+/).length > 1
+ return true
+ return false
+
+ constructor: (element) ->
+ super element
+
+ @multiple = @is_multiple()
+
+ $(".question", @element).each (i, question) =>
+ draggable_opts =
+ revert: 'invalid'
+ if @multiple
+ helper_opts = { helper: "clone" }
+ else helper_opts = {}
+
+ $(".draggable", question).draggable($.extend({}, draggable_opts,
+ helper_opts))
+
+ $(".predicate .droppable", question).droppable
+ accept: (draggable) ->
+ $draggable = $(draggable)
+ if not $draggable.is(".draggable")
+ return false
+ $predicate = $(this)
+
+ for added in $predicate.find("li")
+ if $(added).text() == $draggable.text()
+ return false
+ return true
+
+ drop: (ev, ui) =>
+ added = ui.draggable.clone()
+
+ added.attr('style', '')
+ $(ev.target).append(added)
+ added.draggable(draggable_opts)
+
+ if not @multiple or ui.draggable.closest(".predicate").length > 0
+ ui.draggable.remove()
+
+
+ $(".subject", question).droppable
+ accept: ".draggable"
+ drop: (ev, ui) =>
+ # this is to prevent a situation of dragging out and
+ # dropping back to the same place
+ if $(ui.draggable).closest(".subject").length > 0
+ return
+
+
+ added = ui.draggable.clone()
+
+ added.attr('style', '')
+ if not @multiple
+ $(ev.target).append(added)
+ added.draggable($.extend({}, draggable_opts, helper_opts))
+
+ ui.draggable.remove()
+
+ check_question: (question) ->
+ # subjects placed in predicates
+ count = 0
+ all = 0
+ all_multiple = 0
+ for qp in $(".predicate .question-piece", question)
+ pred = $(qp).closest("[data-predicate]")
+ v = @get_value_optional_list qp, 'solution'
+ mandatory = v[0]
+ optional = v[1]
+ all_multiple += mandatory.length + optional.length
+ pn = pred.data('predicate')
+ if mandatory.indexOf(pn) >= 0 or optional.indexOf(pn) >= 0
+ count += 1
+ @piece_correct qp
+ else
+ @piece_incorrect qp
+ all += 1
+
+ if @multiple
+ for qp in $(".subject .question-piece", question)
+ v = @get_value_optional_list qp, 'solution'
+ mandatory = v[0]
+ optional = v[1]
+ all_multiple += mandatory.length + optional.length
+ return [count, all_multiple]
+ else
+ return [count, all]
+
+
+
+
+