3 <title>The source code</title>
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8 <pre class="prettyprint lang-js"><div id="cls-Ext.ComponentMgr"></div>/**
9 * @class Ext.ComponentMgr
10 * <p>Provides a registry of all Components (instances of {@link Ext.Component} or any subclass
11 * thereof) on a page so that they can be easily accessed by {@link Ext.Component component}
12 * {@link Ext.Component#id id} (see {@link #get}, or the convenience method {@link Ext#getCmp Ext.getCmp}).</p>
13 * <p>This object also provides a registry of available Component <i>classes</i>
14 * indexed by a mnemonic code known as the Component's {@link Ext.Component#xtype xtype}.
15 * The <tt>{@link Ext.Component#xtype xtype}</tt> provides a way to avoid instantiating child Components
16 * when creating a full, nested config object for a complete Ext page.</p>
17 * <p>A child Component may be specified simply as a <i>config object</i>
18 * as long as the correct <tt>{@link Ext.Component#xtype xtype}</tt> is specified so that if and when the Component
19 * needs rendering, the correct type can be looked up for lazy instantiation.</p>
20 * <p>For a list of all available <tt>{@link Ext.Component#xtype xtypes}</tt>, see {@link Ext.Component}.</p>
23 Ext.ComponentMgr = function(){
24 var all = new Ext.util.MixedCollection();
29 <div id="method-Ext.ComponentMgr-register"></div>/**
30 * Registers a component.
31 * @param {Ext.Component} c The component
33 register : function(c){
37 <div id="method-Ext.ComponentMgr-unregister"></div>/**
38 * Unregisters a component.
39 * @param {Ext.Component} c The component
41 unregister : function(c){
45 <div id="method-Ext.ComponentMgr-get"></div>/**
46 * Returns a component by {@link Ext.Component#id id}.
47 * For additional details see {@link Ext.util.MixedCollection#get}.
48 * @param {String} id The component {@link Ext.Component#id id}
49 * @return Ext.Component The Component, <tt>undefined</tt> if not found, or <tt>null</tt> if a
56 <div id="method-Ext.ComponentMgr-onAvailable"></div>/**
57 * Registers a function that will be called when a specified component is added to ComponentMgr
58 * @param {String} id The component {@link Ext.Component#id id}
59 * @param {Function} fn The callback function
60 * @param {Object} scope The scope of the callback
62 onAvailable : function(id, fn, scope){
63 all.on("add", function(index, o){
65 fn.call(scope || o, o);
66 all.un("add", fn, scope);
71 <div id="prop-Ext.ComponentMgr-all"></div>/**
72 * The MixedCollection used internally for the component cache. An example usage may be subscribing to
73 * events on the MixedCollection to monitor addition or removal. Read-only.
74 * @type {MixedCollection}
78 <div id="method-Ext.ComponentMgr-isRegistered"></div>/**
79 * Checks if a Component type is registered.
80 * @param {Ext.Component} xtype The mnemonic string by which the Component class may be looked up
81 * @return {Boolean} Whether the type is registered.
83 isRegistered : function(xtype){
84 return types[xtype] !== undefined;
87 <div id="method-Ext.ComponentMgr-registerType"></div>/**
88 * <p>Registers a new Component constructor, keyed by a new
89 * {@link Ext.Component#xtype}.</p>
90 * <p>Use this method (or its alias {@link Ext#reg Ext.reg}) to register new
91 * subclasses of {@link Ext.Component} so that lazy instantiation may be used when specifying
93 * see {@link Ext.Container#items}</p>
94 * @param {String} xtype The mnemonic string by which the Component class may be looked up.
95 * @param {Constructor} cls The new Component class.
97 registerType : function(xtype, cls){
102 <div id="method-Ext.ComponentMgr-create"></div>/**
103 * Creates a new Component from the specified config object using the
104 * config object's {@link Ext.component#xtype xtype} to determine the class to instantiate.
105 * @param {Object} config A configuration object for the Component you wish to create.
106 * @param {Constructor} defaultType The constructor to provide the default Component type if
107 * the config object does not contain a <tt>xtype</tt>. (Optional if the config contains a <tt>xtype</tt>).
108 * @return {Ext.Component} The newly instantiated Component.
110 create : function(config, defaultType){
111 return config.render ? config : new types[config.xtype || defaultType](config);
114 <div id="method-Ext.ComponentMgr-registerPlugin"></div>/**
115 * <p>Registers a new Plugin constructor, keyed by a new
116 * {@link Ext.Component#ptype}.</p>
117 * <p>Use this method (or its alias {@link Ext#preg Ext.preg}) to register new
118 * plugins for {@link Ext.Component}s so that lazy instantiation may be used when specifying
120 * @param {String} ptype The mnemonic string by which the Plugin class may be looked up.
121 * @param {Constructor} cls The new Plugin class.
123 registerPlugin : function(ptype, cls){
128 <div id="method-Ext.ComponentMgr-createPlugin"></div>/**
129 * Creates a new Plugin from the specified config object using the
130 * config object's {@link Ext.component#ptype ptype} to determine the class to instantiate.
131 * @param {Object} config A configuration object for the Plugin you wish to create.
132 * @param {Constructor} defaultType The constructor to provide the default Plugin type if
133 * the config object does not contain a <tt>ptype</tt>. (Optional if the config contains a <tt>ptype</tt>).
134 * @return {Ext.Component} The newly instantiated Plugin.
136 createPlugin : function(config, defaultType){
137 return new ptypes[config.ptype || defaultType](config);
142 <div id="method-Ext-reg"></div>/**
143 * Shorthand for {@link Ext.ComponentMgr#registerType}
144 * @param {String} xtype The {@link Ext.component#xtype mnemonic string} by which the Component class
146 * @param {Constructor} cls The new Component class.
150 Ext.reg = Ext.ComponentMgr.registerType; // this will be called a lot internally, shorthand to keep the bytes down
151 <div id="method-Ext-preg"></div>/**
152 * Shorthand for {@link Ext.ComponentMgr#registerPlugin}
153 * @param {String} ptype The {@link Ext.component#ptype mnemonic string} by which the Plugin class
155 * @param {Constructor} cls The new Plugin class.
159 Ext.preg = Ext.ComponentMgr.registerPlugin;
160 Ext.create = Ext.ComponentMgr.create;