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Incam_SGD/lib/widgets/widgetfactory.inc.php

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<?php
/**
* $Id$
*
* KnowledgeTree Community Edition
* Document Management Made Simple
* Copyright (C) 2008, 2009 KnowledgeTree Inc.
*
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 3 as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco,
* California 94120-7775, or email info@knowledgetree.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU General Public License version 3.
*
* In accordance with Section 7(b) of the GNU General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* KnowledgeTree" logo and retain the original copyright notice. If the display of the
* logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
* must display the words "Powered by KnowledgeTree" and retain the original
* copyright notice.
* Contributor( s): ______________________________________
*/
/*
* The widget factory is a singleton, which can be used to create
* and register widgets.
*
*/
class KTWidgetFactory {
var $widgets = array();
static function &getSingleton () {
if (!KTUtil::arrayGet($GLOBALS['_KT_PLUGIN'], 'oKTWidgetFactory')) {
$GLOBALS['_KT_PLUGIN']['oKTWidgetFactory'] = new KTWidgetFactory;
}
return $GLOBALS['_KT_PLUGIN']['oKTWidgetFactory'];
}
function registerWidget($sClassname, $sNamespace, $sFilename = null) {
$this->widgets[$sNamespace] = array(
'ns' => $sNamespace,
'class' => $sClassname,
'file' => $sFilename,
);
}
function &getWidgetByNamespace($sNamespace) {
$aInfo = KTUtil::arrayGet($this->widgets, $sNamespace);
if (empty($aInfo)) {
return PEAR::raiseError(sprintf(_kt('No such widget: %s'), $sNamespace));
}
if (!empty($aInfo['file'])) {
require_once($aInfo['file']);
}
return new $aInfo['class'];
}
// this is overridden to either take a namespace or an instantiated
// class. Doing it this way allows for a consistent approach to building
// forms including custom widgets.
function &get($namespaceOrObject, $aConfig = null) {
if (is_string($namespaceOrObject)) {
$oWidget =& $this->getWidgetByNamespace($namespaceOrObject);
} else {
$oWidget = $namespaceOrObject;
}
if (PEAR::isError($oWidget)) {
return $oWidget;
}
$aConfig = (array) $aConfig; // always an array
$res = $oWidget->configure($aConfig);
if (PEAR::isError($res)) {
return $res;
}
return $oWidget;
}
}
?>