ComponentManager.js
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/**
* @class Ext.ComponentManager
* <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 {String} defaultType (optional) The xtype to use 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 (typeof component == 'string') {
return Ext.widget(component);
}
if (component.isComponent) {
return component;
}
return Ext.widget(component.xtype || defaultType, component);
},
registerType: function(type, cls) {
this.types[type] = cls;
cls[this.typeName] = type;
cls.prototype[this.typeName] = type;
}
});