text: /* ************************************************************************
  
     qooxdoo - the new era of web development
  
     http://qooxdoo.org
  
     Copyright:
       2011 1&1 Internet AG, Germany, http://www.1und1.de
  
     License:
       MIT: https://opensource.org/licenses/MIT
       See the LICENSE file in the project's top-level directory for details.
  
     Authors:
       * Christian Hagendorn (chris_schmidt)
  
  ************************************************************************ */
  
  /**
   * Objects which are used as delegates for the <code>qx.ui.tree.VirtualTree</code> may
   * implement any of the methods described in this interface. The delegate does
   * not need to implement all the methods of this interface. If a method is not
   * implemented the <code>qx.ui.tree.VirtualTree</code> provides a default
   * implementation.
   *
   * Note: This interface is meant to document the delegate but should not be
   * listed in the <code>implement</code> key of a class unless all methods are
   * actually implemented.
   */
  qx.Interface.define("qx.ui.tree.core.IVirtualTreeDelegate",
  {
    members :
    {
      /**
       * Gives the user the opportunity to set individual styles and properties
       * on the widget cells created by the controller.
       *
       * @param item {qx.ui.core.Widget} Item to modify.
       */
      configureItem : function(item) {},
  
  
      /**
       * Creates a widget cell which will be used for rendering. Be sure to
       * implement the {@link #bindItem} function as well to get the needed
       * properties bound.
       *
       * @return {qx.ui.core.Widget} A new created item cell.
       */
      createItem : function() {},
  
  
      /**
       * Sets up the binding for the given widget cell and index.
       *
       * For every property you want to bind, use
       * {@link MWidgetController#bindProperty} like this:
       * <code>
       * controller.bindProperty(null, "value", options, item, id);
       * </code>
       *
       * @param controller {qx.ui.list.core.MWidgetController} The currently used controller.
       * @param item {qx.ui.core.Widget} The created and used item.
       * @param id {Integer} The id for the binding.
       */
      bindItem : function(controller, item, id) {},
  
  
      /**
       * Gives the user the opportunity to reset properties or states.
       *
       * @param item {qx.ui.core.Widget} Item to modify.
       */
      onPool : function(item) {},
  
  
      /**
       * Filter checks the current data and returns a boolean if the data should
       * appear in the filtered data set or not.
       *
       * @param data {var} The data which will be checked.
       * @return {Boolean} True, if the data passes the filter, false otherwise.
       */
      filter : function(data) {},
  
  
      /**
       * Gives the user the opportunity to sort the children items from a node.
       * The sorting method should return a negative value if a < b, zero
       * if a = b, or a positive value if a > b.
       *
       * @param a {var} value to compare.
       * @param b {var} value to compare.
       * @return {Integer} should return a negative value if a < b, zero
       *   if a = b, or a positive value if a > b.
       */
      sorter : function(a, b) {}
    }
  });