gistfile1.js

contentView: SC.ListView.design({
          listItemActionProperty: 'action',
          contentValueKey: "title",
          contentBinding: "BB.associationListController.arrangedObjects",
          exampleView: SC.ListItemView.extend({
            renderAction: function(context, actionClassName){
              context.push('<img src="',
                SC.BLANK_IMAGE_URL,
                '" class="action sc-mini-icon plus" />');
            },
            mouseDown: function(evt) {
              // if inside action icon
              if (this._isInsideElementWithClassName('action', evt)) {
                console.log('action triggered');
                return YES; // listItem should handle this event
              }
              // if occurred inside checkbox, item view should handle the event.
              if (this._isInsideCheckbox(evt)) {
                this._addCheckboxActiveState() ;
                this._isMouseDownOnCheckbox = YES ;
                this._isMouseInsideCheckbox = YES ;
                return YES ; // listItem should handle this event

              } else if (this._isInsideDisclosure(evt)) {
                this._addDisclosureActiveState();
                this._isMouseDownOnDisclosure = YES;
                this._isMouseInsideDisclosure = YES ;
                return YES;

              }

              return NO ; // let the collection view handle this event
            }
          })
        })