widgetfactory.inc.php
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<?php
/**
* $Id$
*
* The contents of this file are subject to the KnowledgeTree Public
* License Version 1.1.2 ("License"); You may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.knowledgetree.com/KPL
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the License for the specific language governing rights and
* limitations under the License.
*
* All copies of the Covered Code must include on each user interface screen:
* (i) the "Powered by KnowledgeTree" logo and
* (ii) the KnowledgeTree copyright notice
* in the same form as they appear in the distribution. See the License for
* requirements.
*
* The Original Code is: KnowledgeTree Open Source
*
* The Initial Developer of the Original Code is The Jam Warehouse Software
* (Pty) Ltd, trading as KnowledgeTree.
* Portions created by The Jam Warehouse Software (Pty) Ltd are Copyright
* (C) 2007 The Jam Warehouse Software (Pty) Ltd;
* All Rights Reserved.
* Contributor( s): ______________________________________
*/
/*
* The widget factory is a singleton, which can be used to create
* and register widgets.
*
*/
class KTWidgetFactory {
var $widgets = array();
function &getSingleton() {
if (!KTUtil::arrayGet($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;
}
}
?>