viewArgs[$this->pageArg] is set to 1 if $this->pageArg !== null //the type of the popup. If type !=exclusive, than each voice selected is added to the where clause. If type=exclusive, the selection of a popup voice causes the unselection of the other voices public $type = null; //list of popup names public $popupItems = array(); public function build($url, $popupArray = null, $type = 'exclusive', $pageArg = null) { $this->url = $url; $this->popupArray = $popupArray; $this->pageArg = $pageArg; $this->type = $type; foreach ($this->popupArray as $field => $popup) { $this->popupItems[] = $field; } } //check that the ViewArgs array is complete public function checkViewArgs() { foreach ($this->popupArray as $field => $popup) { if (!array_key_exists($field,$this->viewArgs)) return false; } return true; } //unselect the voices different from the current one public function unselect($currentVoice) { foreach ($this->popupItems as $item) { if (strcmp($item,$currentVoice) !== 0) $this->viewArgs[$item] = Params::$nullQueryValue; } } public function render() { $returnString = null; if ($this->checkViewArgs()) { if (isset($this->viewArgs[$this->pageArg])) { $this->viewArgs[$this->pageArg] = 1; } foreach ($this->popupArray as $field => $popup) { if ($this->type === 'exclusive') $this->unselect($field); //save the value of the current ViewArg $tempArg = $this->viewArgs[$field]; $returnString .= "\n"; $this->viewArgs[$field] = $tempArg; } if (count($this->popupArray)>0) { $returnString .= "\n"; } } return $returnString; } }