/**
* Prepares tr th html
*
* @return string
*/
protected function prepareHeaders()
{
$result = NULL;
foreach ($this->getColumns() as $name) {
if (count($this->visible_columns)) {
if (!in_array($name, $this->visible_columns)) {
continue;
}
}
$header = $this->getHeader($name);
if ($header instanceof Column or $header instanceof Th) {
$this->importFromColumn($header, $name);
$result .= $header->render();
} else {
if ($column = $this->getColumn($name)) {
$column->setData($header);
$column->setHeader();
} else {
$column = Th::create($header);
}
$result .= $column->render();
}
}
return "<tr class='header'>{$result}</tr>\n";
}
