1 | /*
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2 | * FCKeditor - The text editor for Internet - http://www.fckeditor.net
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3 | * Copyright (C) 2003-2009 Frederico Caldeira Knabben
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4 | *
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5 | * == BEGIN LICENSE ==
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6 | *
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7 | * Licensed under the terms of any of the following licenses at your
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8 | * choice:
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9 | *
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10 | * - GNU General Public License Version 2 or later (the "GPL")
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11 | * http://www.gnu.org/licenses/gpl.html
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12 | *
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13 | * - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
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14 | * http://www.gnu.org/licenses/lgpl.html
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15 | *
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16 | * - Mozilla Public License Version 1.1 or later (the "MPL")
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17 | * http://www.mozilla.org/MPL/MPL-1.1.html
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18 | *
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19 | * == END LICENSE ==
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20 | *
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21 | * Preload a list of images, firing an event when complete.
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22 | */
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23 |
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24 | var FCKImagePreloader = function()
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25 | {
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26 | this._Images = new Array() ;
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27 | }
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28 |
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29 | FCKImagePreloader.prototype =
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30 | {
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31 | AddImages : function( images )
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32 | {
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33 | if ( typeof( images ) == 'string' )
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34 | images = images.split( ';' ) ;
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35 |
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36 | this._Images = this._Images.concat( images ) ;
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37 | },
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38 |
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39 | Start : function()
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40 | {
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41 | var aImages = this._Images ;
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42 | this._PreloadCount = aImages.length ;
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43 |
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44 | for ( var i = 0 ; i < aImages.length ; i++ )
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45 | {
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46 | var eImg = document.createElement( 'img' ) ;
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47 | FCKTools.AddEventListenerEx( eImg, 'load', _FCKImagePreloader_OnImage, this ) ;
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48 | FCKTools.AddEventListenerEx( eImg, 'error', _FCKImagePreloader_OnImage, this ) ;
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49 | eImg.src = aImages[i] ;
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50 |
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51 | _FCKImagePreloader_ImageCache.push( eImg ) ;
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52 | }
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53 | }
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54 | };
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55 |
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56 | // All preloaded images must be placed in a global array, otherwise the preload
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57 | // magic will not happen.
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58 | var _FCKImagePreloader_ImageCache = new Array() ;
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59 |
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60 | function _FCKImagePreloader_OnImage( ev, imagePreloader )
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61 | {
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62 | if ( (--imagePreloader._PreloadCount) == 0 && imagePreloader.OnComplete )
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63 | imagePreloader.OnComplete() ;
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64 | }
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