Angularjs 如何在angular ui sortable回调中等待确认对话框

我使用angular ui sortable在列表之间拖放项目。我希望能够做的是（在某些拖放条件下）有一个确认对话框，如果用户取消该对话框，则将列表恢复到其原始状态。我可以在更新事件中使用

ui.item.sortable.cancel（）

方法，但是如果我使用返回承诺的模式，我就不知道如何在取消时恢复列表。以下是我控制器中的内容（modalService是一个引导$uibModal）：

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任何建议都值得赞赏。

如果没有一些主要的技巧，我无法让它正常工作，因此我最终没有在更新回调中使用cancel（）方法，而是通过分配一些变量，将相应数组中的数据恢复到eth stop回调中的状态，如下所示：

    $scope.sortableOptions =
        handle: ' > span > span > .task-drag-icon',
        connectWith: ".task-subset"
        placeholder: "sortable-placeholder",
        forcePlaceholderSize: true,
        stop: (e, ui) ->
          orig_index = ui.item.sortable.index
          new_idex = ui.item.sortable.dropindex
          sourceModel = ui.item.sortable.sourceModel
          droptargetModel = ui.item.sortable.droptargetModel
          model = ui.item.sortable.model

          if sourceModel == droptargetModel #sort was within the same list
            #some other logic here.....
          else
            droptarget_element = ui.item.sortable.droptarget

            if droptarget_element.attr('ng-model') == "task.subTasks"
              #need the user to confirm here if they really want to do this drag/drop
              modalOptions =
                closeButtonText: 'Cancel'
                actionButtonText: 'Make SubTask'
                headerText: 'Make SubTask?'
                bodyText: 'This action will remove any existing task groups as it will become a child task. Is this OK?'
              modalService.showModal({}, modalOptions).then (result) ->
                  console.log "accpted"
                , () ->
                  #put model back in orginal poisition
                  sourceModel.splice orig_index, 0, model
                  #remove from target array
                  droptargetModel.splice new_idex, 1

          return

    $scope.sortableOptions =
        handle: ' > span > span > .task-drag-icon',
        connectWith: ".task-subset"
        placeholder: "sortable-placeholder",
        forcePlaceholderSize: true,
        stop: (e, ui) ->
          orig_index = ui.item.sortable.index
          new_idex = ui.item.sortable.dropindex
          sourceModel = ui.item.sortable.sourceModel
          droptargetModel = ui.item.sortable.droptargetModel
          model = ui.item.sortable.model

          if sourceModel == droptargetModel #sort was within the same list
            #some other logic here.....
          else
            droptarget_element = ui.item.sortable.droptarget

            if droptarget_element.attr('ng-model') == "task.subTasks"
              #need the user to confirm here if they really want to do this drag/drop
              modalOptions =
                closeButtonText: 'Cancel'
                actionButtonText: 'Make SubTask'
                headerText: 'Make SubTask?'
                bodyText: 'This action will remove any existing task groups as it will become a child task. Is this OK?'
              modalService.showModal({}, modalOptions).then (result) ->
                  console.log "accpted"
                , () ->
                  #put model back in orginal poisition
                  sourceModel.splice orig_index, 0, model
                  #remove from target array
                  droptargetModel.splice new_idex, 1

          return