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9 <pre class="prettyprint lang-js">/*!
10 * Ext JS Library 3.2.1
11 * Copyright(c) 2006-2010 Ext JS, Inc.
13 * http://www.extjs.com/license
15 <div id="cls-Ext.ComponentMgr"></div>/**
16 * @class Ext.ComponentMgr
17 * <p>Provides a registry of all Components (instances of {@link Ext.Component} or any subclass
18 * thereof) on a page so that they can be easily accessed by {@link Ext.Component component}
19 * {@link Ext.Component#id id} (see {@link #get}, or the convenience method {@link Ext#getCmp Ext.getCmp}).</p>
20 * <p>This object also provides a registry of available Component <i>classes</i>
21 * indexed by a mnemonic code known as the Component's {@link Ext.Component#xtype xtype}.
22 * The <code>{@link Ext.Component#xtype xtype}</code> provides a way to avoid instantiating child Components
23 * when creating a full, nested config object for a complete Ext page.</p>
24 * <p>A child Component may be specified simply as a <i>config object</i>
25 * as long as the correct <code>{@link Ext.Component#xtype xtype}</code> is specified so that if and when the Component
26 * needs rendering, the correct type can be looked up for lazy instantiation.</p>
27 * <p>For a list of all available <code>{@link Ext.Component#xtype xtypes}</code>, see {@link Ext.Component}.</p>
30 Ext.ComponentMgr = function(){
31 var all = new Ext.util.MixedCollection();
36 <div id="method-Ext.ComponentMgr-register"></div>/**
37 * Registers a component.
38 * @param {Ext.Component} c The component
40 register : function(c){
44 <div id="method-Ext.ComponentMgr-unregister"></div>/**
45 * Unregisters a component.
46 * @param {Ext.Component} c The component
48 unregister : function(c){
52 <div id="method-Ext.ComponentMgr-get"></div>/**
53 * Returns a component by {@link Ext.Component#id id}.
54 * For additional details see {@link Ext.util.MixedCollection#get}.
55 * @param {String} id The component {@link Ext.Component#id id}
56 * @return Ext.Component The Component, <code>undefined</code> if not found, or <code>null</code> if a
63 <div id="method-Ext.ComponentMgr-onAvailable"></div>/**
64 * Registers a function that will be called when a Component with the specified id is added to ComponentMgr. This will happen on instantiation.
65 * @param {String} id The component {@link Ext.Component#id id}
66 * @param {Function} fn The callback function
67 * @param {Object} scope The scope (<code>this</code> reference) in which the callback is executed. Defaults to the Component.
69 onAvailable : function(id, fn, scope){
70 all.on("add", function(index, o){
72 fn.call(scope || o, o);
73 all.un("add", fn, scope);
78 <div id="prop-Ext.ComponentMgr-all"></div>/**
79 * The MixedCollection used internally for the component cache. An example usage may be subscribing to
80 * events on the MixedCollection to monitor addition or removal. Read-only.
81 * @type {MixedCollection}
85 <div id="prop-Ext.ComponentMgr-types"></div>/**
86 * The xtypes that have been registered with the component manager.
91 <div id="prop-Ext.ComponentMgr-ptypes"></div>/**
92 * The ptypes that have been registered with the component manager.
97 <div id="method-Ext.ComponentMgr-isRegistered"></div>/**
98 * Checks if a Component type is registered.
99 * @param {Ext.Component} xtype The mnemonic string by which the Component class may be looked up
100 * @return {Boolean} Whether the type is registered.
102 isRegistered : function(xtype){
103 return types[xtype] !== undefined;
106 <div id="method-Ext.ComponentMgr-isPluginRegistered"></div>/**
107 * Checks if a Plugin type is registered.
108 * @param {Ext.Component} ptype The mnemonic string by which the Plugin class may be looked up
109 * @return {Boolean} Whether the type is registered.
111 isPluginRegistered : function(ptype){
112 return ptypes[ptype] !== undefined;
115 <div id="method-Ext.ComponentMgr-registerType"></div>/**
116 * <p>Registers a new Component constructor, keyed by a new
117 * {@link Ext.Component#xtype}.</p>
118 * <p>Use this method (or its alias {@link Ext#reg Ext.reg}) to register new
119 * subclasses of {@link Ext.Component} so that lazy instantiation may be used when specifying
121 * see {@link Ext.Container#items}</p>
122 * @param {String} xtype The mnemonic string by which the Component class may be looked up.
123 * @param {Constructor} cls The new Component class.
125 registerType : function(xtype, cls){
130 <div id="method-Ext.ComponentMgr-create"></div>/**
131 * Creates a new Component from the specified config object using the
132 * config object's {@link Ext.component#xtype xtype} to determine the class to instantiate.
133 * @param {Object} config A configuration object for the Component you wish to create.
134 * @param {Constructor} defaultType The constructor to provide the default Component type if
135 * the config object does not contain a <code>xtype</code>. (Optional if the config contains a <code>xtype</code>).
136 * @return {Ext.Component} The newly instantiated Component.
138 create : function(config, defaultType){
139 return config.render ? config : new types[config.xtype || defaultType](config);
142 <div id="method-Ext.ComponentMgr-registerPlugin"></div>/**
143 * <p>Registers a new Plugin constructor, keyed by a new
144 * {@link Ext.Component#ptype}.</p>
145 * <p>Use this method (or its alias {@link Ext#preg Ext.preg}) to register new
146 * plugins for {@link Ext.Component}s so that lazy instantiation may be used when specifying
148 * @param {String} ptype The mnemonic string by which the Plugin class may be looked up.
149 * @param {Constructor} cls The new Plugin class.
151 registerPlugin : function(ptype, cls){
156 <div id="method-Ext.ComponentMgr-createPlugin"></div>/**
157 * Creates a new Plugin from the specified config object using the
158 * config object's {@link Ext.component#ptype ptype} to determine the class to instantiate.
159 * @param {Object} config A configuration object for the Plugin you wish to create.
160 * @param {Constructor} defaultType The constructor to provide the default Plugin type if
161 * the config object does not contain a <code>ptype</code>. (Optional if the config contains a <code>ptype</code>).
162 * @return {Ext.Component} The newly instantiated Plugin.
164 createPlugin : function(config, defaultType){
165 var PluginCls = ptypes[config.ptype || defaultType];
166 if (PluginCls.init) {
169 return new PluginCls(config);
175 <div id="method-Ext-reg"></div>/**
176 * Shorthand for {@link Ext.ComponentMgr#registerType}
177 * @param {String} xtype The {@link Ext.component#xtype mnemonic string} by which the Component class
179 * @param {Constructor} cls The new Component class.
183 Ext.reg = Ext.ComponentMgr.registerType; // this will be called a lot internally, shorthand to keep the bytes down
184 <div id="method-Ext-preg"></div>/**
185 * Shorthand for {@link Ext.ComponentMgr#registerPlugin}
186 * @param {String} ptype The {@link Ext.component#ptype mnemonic string} by which the Plugin class
188 * @param {Constructor} cls The new Plugin class.
192 Ext.preg = Ext.ComponentMgr.registerPlugin;
193 <div id="method-Ext-create"></div>/**
194 * Shorthand for {@link Ext.ComponentMgr#create}
195 * Creates a new Component from the specified config object using the
196 * config object's {@link Ext.component#xtype xtype} to determine the class to instantiate.
197 * @param {Object} config A configuration object for the Component you wish to create.
198 * @param {Constructor} defaultType The constructor to provide the default Component type if
199 * the config object does not contain a <code>xtype</code>. (Optional if the config contains a <code>xtype</code>).
200 * @return {Ext.Component} The newly instantiated Component.
204 Ext.create = Ext.ComponentMgr.create;</pre>