SOURCE CODE: Uize.Widget.mModels (view docs)

/*______________
|       ______  |   U I Z E    J A V A S C R I P T    F R A M E W O R K
|     /      /  |   ---------------------------------------------------
|    /    O /   |    MODULE : Uize.Widget.mModels Mixin
|   /    / /    |
|  /    / /  /| |    ONLINE : http://www.uize.com
| /____/ /__/_| | COPYRIGHT : (c)2014-2016 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://www.uize.com/license.html
*/

/* Module Meta Data
  type: Mixin
  importance: 5
  codeCompleteness: 60
  docCompleteness: 50
*/

/*?
  Introduction
    The =Uize.Widget.mModels= widget mixin provides support for widgets that can contain child model class objects, allowing state between a widget and its child models to be bound.

    *DEVELOPERS:* `Ben Ilegbodu`, original code contributed by `Zazzle Inc.`

    =Uize.Widget.mModels= mixes in =Uize.Class.mModels= which provides a majority of the model functionality. =Uize.Widget.mModels= provides the following additional support...

    - Any model objects added to a widget are passed down to its child widgets, provided that those child widgets also support containing model objects
*/

Uize.module ({
  name:'Uize.Widget.mModels',
  required:'Uize.Class.mModels',
  builder:function () {
    'use strict';

    return function (_class) {
      _class.declare ({
        mixins:Uize.Class.mModels,

        alphastructor: function () {
          var
            m = this,
            _children = m.children,
            _models = m.models,

            _addModelsToChildren = function() {
              for (var _childName in _children) {
                var _child = _children[_childName];

                Uize.isFunction(_child.addModel)  // TODO: More robust way to determine that child mixes in Uize.Class.mModels?
                  && _children[_childName].set({models:_models})
                ;
              }
            }
          ;

          m.addedModels.wire('Changed.*', _addModelsToChildren); // TODO: support for removed models
          m.addedChildren.wire('Changed.*', _addModelsToChildren); // TODO: support for removed widgets
        }
      });
    };
  }
});