gistfile1.js

require('core');
require('models/message');

OI.messagesController = SC.ArrayController.create({

  allowsEmptySelection: false,
  allowsMultipleSelection: true,
  contentBinding: 'OI.mailboxController.messages',
  contentBindingDefault: SC.Binding.Multiple,

  _isChanging: false,

  selectionObserver: function() {
  	var sel = this.get('selection');
    
    if (sel && sel.length == 1) {
      sel[0].markAsRead(); 
    }
  }.observes('selection'),

  // Enables dragging to mailboxes

  collectionViewDragDataTypes: function(view) { 
    return [OI.MESSAGE_TYPE];
  },
  
  // Provide the actual message data for dragging

  collectionViewDragDataForType: function(view, dataType, drag) {  
    return (dataType === OI.MESSAGE_TYPE) ? this.get('selection') : null;
  }
  
});