3 * Copyright(c) 2006-2010 Ext JS, Inc.
5 * http://www.extjs.com/license
9 * A simple utility class for generically masking elements while loading data. If the {@link #store}
10 * config option is specified, the masking will be automatically synchronized with the store's loading
11 * process and the mask element will be cached for reuse. For all other elements, this mask will replace the
12 * element's Updater load indicator and will be destroyed after the initial load.
13 * <p>Example usage:</p>
16 var myMask = new Ext.LoadMask(Ext.getBody(), {msg:"Please wait..."});
20 * Create a new LoadMask
21 * @param {Mixed} el The element or DOM node, or its id
22 * @param {Object} config The config object
24 Ext.LoadMask = function(el, config){
25 this.el = Ext.get(el);
26 Ext.apply(this, config);
30 beforeload: this.onBeforeLoad,
32 exception: this.onLoad
34 this.removeMask = Ext.value(this.removeMask, false);
36 var um = this.el.getUpdater();
37 um.showLoadIndicator = false; // disable the default indicator
40 beforeupdate: this.onBeforeLoad,
44 this.removeMask = Ext.value(this.removeMask, true);
48 Ext.LoadMask.prototype = {
50 * @cfg {Ext.data.Store} store
51 * Optional Store to which the mask is bound. The mask is displayed when a load request is issued, and
52 * hidden on either load sucess, or load fail.
55 * @cfg {Boolean} removeMask
56 * True to create a single-use mask that is automatically destroyed after loading (useful for page loads),
57 * False to persist the mask element reference for multiple uses (e.g., for paged data widgets). Defaults to false.
61 * The text to display in a centered loading message box (defaults to 'Loading...')
65 * @cfg {String} msgCls
66 * The CSS class to apply to the loading message element (defaults to "x-mask-loading")
68 msgCls : 'x-mask-loading',
71 * Read-only. True if the mask is currently disabled so that it will not be displayed (defaults to false)
77 * Disables the mask to prevent it from being displayed
84 * Enables the mask so that it can be displayed
87 this.disabled = false;
92 this.el.unmask(this.removeMask);
96 onBeforeLoad : function(){
98 this.el.mask(this.msg, this.msgCls);
103 * Show this LoadMask over the configured Element.
110 * Hide this LoadMask.
117 destroy : function(){
119 this.store.un('beforeload', this.onBeforeLoad, this);
120 this.store.un('load', this.onLoad, this);
121 this.store.un('exception', this.onLoad, this);
123 var um = this.el.getUpdater();
124 um.un('beforeupdate', this.onBeforeLoad, this);
125 um.un('update', this.onLoad, this);
126 um.un('failure', this.onLoad, this);