1 <!DOCTYPE html><html><head><title>Ext.ComponentQuery | Ext JS 4.0 Documentation</title><script type="text/javascript" src="../ext-all.js"></script><link rel="stylesheet" href="../reset.css" type="text/css"><link rel="stylesheet" href="../scrollbars.css" type="text/css"><link rel="stylesheet" href="../docs.css" type="text/css"><link id="styleCss" rel="stylesheet" href="../style.css" type="text/css"><script type="text/javascript" src="../prettify.js"></script><link rel="stylesheet" href="../prettify.css" type="text/css"><!-- link(rel: 'stylesheet', href: req.baseURL + '/css/ext4.css', type: 'text/css')--><link rel="shortcut icon" type="image/ico" href="../favicon.ico"><!--[if IE]>
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12 origDocClass: 'Ext.ComponentQuery',
13 docClass: 'Ext.ComponentQuery',
14 docReq: 'Ext.ComponentQuery',
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33 clsInfo = {"methods":["query"],"cfgs":[],"properties":[],"events":[],"subclasses":[]};
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37 </script><div id="top-block" class="top-block"><h1 id="clsTitle" class="cls"><a href="../source/ComponentQuery.html#Ext-ComponentQuery" target="_blank">Ext.ComponentQuery</a></h1></div><div id="docContent"><div id="doc-overview-content"><div class="lft"><p>Provides searching of Components within <a href="Ext.ComponentManager.html" rel="Ext.ComponentManager" class="docClass">Ext.ComponentManager</a> (globally) or a specific
38 <a href="Ext.container.Container.html" rel="Ext.container.Container" class="docClass">Ext.container.Container</a> on the document with a similar syntax to a CSS selector.</p>
40 <p>Components can be retrieved by using their <a href="Ext.Component.html" rel="Ext.Component" class="docClass">xtype</a> with an optional . prefix</p>
43 <li>component or .component</li>
44 <li>gridpanel or .gridpanel</li>
48 <p>An itemId or id must be prefixed with a #</p>
55 <p>Attributes must be wrapped in brackets</p>
58 <li>component[autoScroll]</li>
59 <li>panel[title="Test"]</li>
63 <p>Member expressions from candidate Components may be tested. If the expression returns a <i>truthy</i> value,
64 the candidate Component will be included in the query:</p>
66 <pre class="prettyprint"><code>var disabledFields = myFormPanel.query("{isDisabled()}");
70 <p>Pseudo classes may be used to filter results in the same way as in <a href="Ext.DomQuery.html" rel="Ext.DomQuery" class="docClass">DomQuery</a>:<code></p>
72 <pre class="prettyprint">// Function receives array and returns a filtered array.
73 Ext.ComponentQuery.pseudos.invalid = function(items) {
74 var i = 0, l = items.length, c, result = [];
76 if (!(c = items[i]).isValid()) {
83 var invalidFields = myFormPanel.query('field:invalid');
84 if (invalidFields.length) {
85 invalidFields[0].getEl().scrollIntoView(myFormPanel.body);
86 for (var i = 0, l = invalidFields.length; i < l; i++) {
87 invalidFields[i].getEl().frame("red");
96 Default pseudos include:<br />
101 <p>Queries return an array of components.
102 Here are some example queries.</p>
104 <pre class="prettyprint"><code> // retrieve all Ext.Panels in the document by xtype
105 var panelsArray = Ext.ComponentQuery.query('panel');
107 // retrieve all Ext.Panels within the container with an id myCt
108 var panelsWithinmyCt = Ext.ComponentQuery.query('#myCt panel');
110 // retrieve all direct children which are Ext.Panels within myCt
111 var directChildPanel = Ext.ComponentQuery.query('#myCt > panel');
113 // retrieve all gridpanels and listviews
114 var gridsAndLists = Ext.ComponentQuery.query('gridpanel, listview');
118 <p>For easy access to queries based from a particular Container see the <a href="Ext.container.Container.html#query" rel="Ext.container.Container#query" class="docClass">Ext.container.Container.query</a>,
119 <a href="Ext.container.Container.html#down" rel="Ext.container.Container#down" class="docClass">Ext.container.Container.down</a> and <a href="Ext.container.Container.html#child" rel="Ext.container.Container#child" class="docClass">Ext.container.Container.child</a> methods. Also see
120 <a href="Ext.Component.html#up" rel="Ext.Component#up" class="docClass">Ext.Component.up</a>.</p>
121 <div class="members"><div class="m-methods"><a name="methods"></a><div class="definedBy">Defined By</div><h3 class="mth p">Methods</h3><div id="method-query" class="member f ni"><a href="Ext.ComponentQuery.html#method-query" rel="method-query" class="expand more ar"><span> </span></a><div class="title"><div class="meta"><a href="Ext.ComponentQuery.html" class="definedIn docClass">Ext.ComponentQuery</a><br/><a href="../source/ComponentQuery.html#Ext-ComponentQuery-method-query" class="viewSource">view source</a></div><a name="query"></a><a name="method-query"></a><a href="Ext.ComponentQuery.html#" rel="method-query" class="cls expand">query</a>(
122 <span class="pre">Object component, Object selector</span>)
123 : Boolean</div><div class="description"><div class="short"><p>Tests whether the passed Component matches the selector string.</p>
124 </div><div class="long"><p>Tests whether the passed Component matches the selector string.</p>
125 <h3 class="pa">Parameters</h3><ul><li><span class="pre">component</span> : Object<div class="sub-desc"><p>The Component to test</p>
126 </div></li><li><span class="pre">selector</span> : Object<div class="sub-desc"><p>The selector string to test against.</p>
127 </div></li></ul><h3 class="pa">Returns</h3><ul><li><span class="pre">Boolean</span> <p>True if the Component matches the selector.</p>
128 </li></ul></div></div></div></div></div></div></div><div id="pageContent"></div></div></div></div></body></html>