1/* 2 * FCKeditor - The text editor for Internet - http://www.fckeditor.net 3 * Copyright (C) 2003-2007 Frederico Caldeira Knabben 4 * 5 * == BEGIN LICENSE == 6 * 7 * Licensed under the terms of any of the following licenses at your 8 * choice: 9 * 10 * - GNU General Public License Version 2 or later (the "GPL") 11 * http://www.gnu.org/licenses/gpl.html 12 * 13 * - GNU Lesser General Public License Version 2.1 or later (the "LGPL") 14 * http://www.gnu.org/licenses/lgpl.html 15 * 16 * - Mozilla Public License Version 1.1 or later (the "MPL") 17 * http://www.mozilla.org/MPL/MPL-1.1.html 18 * 19 * == END LICENSE == 20 * 21 * Preload a list of images, firing an event when complete. 22 */ 23 24var FCKImagePreloader = function() 25{ 26 this._Images = new Array() ; 27} 28 29FCKImagePreloader.prototype = 30{ 31 AddImages : function( images ) 32 { 33 if ( typeof( images ) == 'string' ) 34 images = images.split( ';' ) ; 35 36 this._Images = this._Images.concat( images ) ; 37 }, 38 39 Start : function() 40 { 41 var aImages = this._Images ; 42 this._PreloadCount = aImages.length ; 43 44 for ( var i = 0 ; i < aImages.length ; i++ ) 45 { 46 var eImg = document.createElement( 'img' ) ; 47 FCKTools.AddEventListenerEx( eImg, 'load', _FCKImagePreloader_OnImage, this ) ; 48 FCKTools.AddEventListenerEx( eImg, 'error', _FCKImagePreloader_OnImage, this ) ; 49 eImg.src = aImages[i] ; 50 51 _FCKImagePreloader_ImageCache.push( eImg ) ; 52 } 53 } 54}; 55 56// All preloaded images must be placed in a global array, otherwise the preload 57// magic will not happen. 58var _FCKImagePreloader_ImageCache = new Array() ; 59 60function _FCKImagePreloader_OnImage( ev, imagePreloader ) 61{ 62 if ( (--imagePreloader._PreloadCount) == 0 && imagePreloader.OnComplete ) 63 imagePreloader.OnComplete() ; 64}