Hi All

I have been going through the classes we have developed and sharing back with the community some of them that I think will be useful to others. These components have been tested in ext-3.2.1.

Here is: Ext.ux.panel.RemoteInstantiateDirect

A plugin which will send data to the server and instantiate new child objects into the container it is attached to based on the return. The return from the server is meant to be a config for an ext component that will be instantiate. Requests made to server are made through an ext direct method placed in the api.load config property.

Code:
/**
 * @author Will Ferrer, Ethan Brooks
 * @copyright (c) 2012, Intellectual Property Private Equity Group
 * @licensee 2012 developed under license for Switchsoft LLC http://www.switchsoft.com a "Direct response telephony company" as part of it's "VOIP Call distribution, ROI analysis platform, call recording, and IVR for inbound and outbound sales" and Run the Business Systems LLC a "Technology development investment group" as part of it's "PHP, Javascript rapid application development framework and MySQL analysis tools"
 * @license licensed under the terms of
 * the Open Source LGPL 3.0 license.  Commercial use is permitted to the extent
 * that the code/component(s) do NOT become part of another Open Source or Commercially
 * licensed development library or toolkit without explicit permission.
 * <p>License details: <a href="http://www.gnu.org/licenses/lgpl.html"
 * target="_blank">http://www.gnu.org/licenses/lgpl.html</a></p>
* We are pretty nice just ask. We want to meet our licensees
*/

/**
 * @class Ext.ux.panel.RemoteInstantiateDirect
 * @extends Object
 * A plugin which will send data to the server and instantiate new child objects into the container it is attached to based on the return. The return from the server is meant to be a config for an ext component that will be instantiate. Requests made to server are made through an ext direct method placed in the api.load config property. Data passed back from the server should be structured as follows:
 * {'addToItems':true if you want the container to not have its current contents cleared before adding the new items being downloaded from the server, items:[configs for each item goes here -- if you include an object with a key of 'eval' anywhere in a config with a 'scope' property and a 'string' property this part of the config will be replaced with the evaled version of the string. If you include a property of 'asProperty' and set it to a string, then the item will be created and added to this plugins parent as a property (specified by that string) instead of added to the parent by use of the 'add' function -- in this way you can add properties to the parent with other configs and scripts can access (useful for when you want to instantiate a store which other configs you are passing needs to use)], evals:[{scope:string that represents the scope that the string will be run in -- usualy 'this', string:the string to eval}]
 * Each item that is instantiated will be stored on the plugin in the instantiatedItems property with a key of the id of the item that was instantiated. 
 * @constructor
 * @param {Object} config The config object
 * @ptype ux-panel-remoteinstantiatedirect
 */
Ext.ns('Ext.ux.panel');
Ext.ux.panel.RemoteInstantiateDirect = function(config){
    Ext.apply(this, config);
    Ext.ux.panel.RemoteInstantiateDirect.superclass.constructor.call(this);
};
Ext.extend(Ext.ux.panel.RemoteInstantiateDirect, Ext.util.Observable, {
//Public Properties:
    /**
    * @cfg {Array|Null} captureParmas
    * An array of the params to capture and send to the remote server. Each param should be a property of the object that the plugin is attached to -- this properties will be collected and passed with the other params to the remote script. Defaults to null.
    */
    captureParmas : null,
    /**
    * @cfg {Object|Null} baseParams
    * Base params to send to the remote script. Defaults to null.
    */
    baseParams : null,
    /**
    * @cfg {Object} api
    * The api to use for direct requests. Defaults to Object.
    */
    api : {
        load : null
    },
    /**
    * @cfg {Boolean} displayErrors
    * Whether or not to display errors returned from the remote server. Defaults to true.
    */
    displayErrors : true,
    /**
    * @cfg {Boolean} autoLoad
    * Run load when component is instantiated by default. Defaults to true.
    */
    autoLoad : true,
    /**
    * @cfg {Boolean} autoLayout
    * Run the parent components do layout function when each new item is added. Defaults to true.
    */
    autoLayout : true,
    /**
    * @cfg {Boolean} autoRender
    * Run the  components render function when added to the parent -- activates only if there is a render function to run. Defaults to true.
    */
    autoRender : true,
    /**
    * @cfg {Boolean} autoShow
    * Run the  components show function when added to the parent -- activates only if there is a show function to run. Defaults to true.
    */
    autoShow : true,
//Private Properites:
    // @private
    parent : null,
    // @private
    instantiatedItems : {},
//Public Functions:
    /** Public Function: load
    * loads the component to instantiate from the remote server
    * @param {Object} params (Required) additional params to send to the remote script.
    */
    load: function(params) {
        var capturedParams = this.captureParams();
            params = Ext.apply(capturedParams, this.baseParams, params),
            api = this.api;
        if (this.parent.fireEvent('beforeloadremotecomponent', this, params)) {
            api.load(params, this.loadSuccess, this);
        }
        
    },
    /** Public Function: instantiate
    * instantiates a new object based on the return from the server. Is usually called by the loadSuccess function but can also be called directly.
    * @param {Object} info (Required) the info used to instantiate the object
    */
    instantiate : function(info) {
        var addToItems = info['addToItems'],
            items = info['items'],
            autoLayout = this.autoLayout,
            autoRender = this.autoRender,
            autoShow = this.autoShow,
            n, curItem, curEval, finishedItem, processed, asProperty;
            
        if (addToItems!=true) {
            this.parent.removeAll();
        }
        for (n=0; n<items.length; n++) {
            curItem = items[n];
            asProperty = curItem['asProperty'];
            processed = this.preProcess(curItem);
            curItem = processed;
            if (!Ext.isEmpty(asProperty)) {
                if (!Ext.isEmpty(curItem.xtype)) {
                    finishedItem = Ext.create(curItem);
                } else {
                    finishedItem = curItem;
                }
                this.parent[asProperty] = finishedItem;
            } else {
                this.parent.add(curItem);
                finishedItem = this.parent.items.items[this.parent.items.items.length-1];
                if (autoLayout) {
                    this.parent.doLayout();
                }
                
                if (autoRender && !Ext.isEmpty(finishedItem.render)) {
                    finishedItem.render();
                }
                
                if (autoShow && !Ext.isEmpty(finishedItem.show)) {
                    finishedItem.show();
                }
            }
            this.instantiatedItems[finishedItem.id] = finishedItem;
            curEval = (Ext.isArray(curItem.evals))?curItem.evals:[curItem.evals];
            this.runEvals(finishedItem, curItem.evals);
        }
    },
//Private Functions:
    // @private
    loadSuccess : function (response, options) {
        if (response.success == true) {
            this.instantiate(response.result);

        } else if (this.displayErrors) {
            // show error
            Ext.Msg.alert('Error', response.message);
        }
        this.parent.fireEvent('afterloadremotecomponent', this, response, options);
    },
    // @private
    preProcess : function (target) {
        var obj, string, scope, property, evaled, processed;
        for (obj in target) {
            if (obj!='eval') {
                child = target[obj];
                if (typeof(child) == 'object') {
                    processed = this.preProcess(child);
                    /*if (!Ext.isEmpty(processed)) {
                        processed.remoteInstantiateContainer = this.parent;
                    }*/
                    target[obj] = processed;
                }
            }
            /*if (obj=='storeData') {
                target['data'] = target[obj];
            }*/
        }
        if (!Ext.isEmpty(target) && typeof(target) == 'object' && !Ext.isEmpty(target['eval'])) {
            scope = eval(target['eval']['scope']);
            string = target['eval']['string'];
            evaled = this.evalString.call(scope, string);
            target = evaled;
        }
        return target;
    },
    // @private
    runEvals : function (evals) {
        var n, curEval, data, scope;
        for (n=0; n<evals.length; n++) {
            curEval = evals[n];
            string = curEval['string'];
            scope = eval(curEval['scope']);
            this.evalString.call(scope, string);
        }
    },
    // @private
    evalString : function (string) {
        var returnObj = eval(string);
        return returnObj;
    },
    // @private
    init: function(parent) {
        this.parent = parent;
        this.parent.remoteInstantiate = this;
        this.parent.addEvents(
            /**
            * @event beforeloadremotecomponent
            * Fires when a remote item is about to be loaded. Return false to cancel the operation.
            * @param {Ext.ux.panel.RemoteInstantiateDirect} this
            * @param {Object} params The params that will be passed to the remote script
            */
            'beforeloadremotecomponent',
            /**
            * @event beforeloadremoteitem
            * Fires when a remote item is about to be loaded. Return false to cancel the operation.
            * @param {Ext.ux.panel.RemoteInstantiateDirect} this
            * @param {Object} response The response from the server
            * @param {Object} options The options passed to the direct request   
            */
            'afterloadremotecomponent'
        );

        if (this.autoLoad) {
            this.load();
        }
    },
    // @private
    captureParams: function (captureParams) {
        var captureParams = (Ext.isEmpty(captureParams))?this.captureParams:captureParams,
            n, properties={}, curProperty;
        for(n=0;n<captureParams.length; n++){
            curProperty = captureParams[n];
            properties[curProperty] = this.parent[curProperty];
        }
        return properties;
    }
    
});
Ext.preg('ux-panel-remoteinstantiatedirect', Ext.ux.panel.RemoteInstantiateDirect);
Best regards

Will Ferrer (Run the Business)