/**
+ * @class Ext.ComponentManager
+ * @extends Ext.AbstractManager
+ * <p>Provides a registry of all Components (instances of {@link Ext.Component} or any subclass
+ * thereof) on a page so that they can be easily accessed by {@link Ext.Component component}
+ * {@link Ext.Component#id id} (see {@link #get}, or the convenience method {@link Ext#getCmp Ext.getCmp}).</p>
+ * <p>This object also provides a registry of available Component <i>classes</i>
+ * indexed by a mnemonic code known as the Component's {@link Ext.Component#xtype xtype}.
+ * The <code>xtype</code> provides a way to avoid instantiating child Components
+ * when creating a full, nested config object for a complete Ext page.</p>
+ * <p>A child Component may be specified simply as a <i>config object</i>
+ * as long as the correct <code>{@link Ext.Component#xtype xtype}</code> is specified so that if and when the Component
+ * needs rendering, the correct type can be looked up for lazy instantiation.</p>
+ * <p>For a list of all available <code>{@link Ext.Component#xtype xtypes}</code>, see {@link Ext.Component}.</p>
+ * @singleton
+ */
+Ext.define('Ext.ComponentManager', {
+ extend: 'Ext.AbstractManager',
+ alternateClassName: 'Ext.ComponentMgr',
+
+ singleton: true,
+
+ typeName: 'xtype',
+
+ /**
+ * Creates a new Component from the specified config object using the
+ * config object's xtype to determine the class to instantiate.
+ * @param {Object} config A configuration object for the Component you wish to create.
+ * @param {Constructor} defaultType The constructor to provide the default Component type if
+ * the config object does not contain a <code>xtype</code>. (Optional if the config contains a <code>xtype</code>).
+ * @return {Ext.Component} The newly instantiated Component.
+ */
+ create: function(component, defaultType){
+ if (component instanceof Ext.AbstractComponent) {
+ return component;
+ }
+ else if (Ext.isString(component)) {
+ return Ext.createByAlias('widget.' + component);
+ }
+ else {
+ var type = component.xtype || defaultType,
+ config = component;
+
+ return Ext.createByAlias('widget.' + type, config);
+ }
+ },
+
+ registerType: function(type, cls) {
+ this.types[type] = cls;
+ cls[this.typeName] = type;
+ cls.prototype[this.typeName] = type;
+ }
+});