/**
* Return a TH element that serves as a header for a column. Can be used
* for either sortable or non-sortable columns.
*
* @param String $title the displayable title for the column.
* @param String $column (optional) Makes this column sortable by this (db) column name.
* @param boolean $descendByDefault if true, when clicked for the first time,
* this column will be sorted in descending order. (false by default).
*/
public function columnHeader($title, $column = null, $descendByDefault = false)
{
$th = new HTMLElement("th");
// If this column is sortable
if ($column) {
$href = Href::current();
$href->set(PagingInfoPrefs::getOrderByColumnParamName($this->getName()), $column);
$newSortOrder = $this->getNewSortOrderForColumn($column, $descendByDefault);
$className = 'sortable';
// If this column is sorted
if ($this->pagingInfo->getOrderByColumn() != null && $this->pagingInfo->getOrderByColumn() == $column) {
$className = $this->pagingInfo->isOrderByAscending() ? "orderAsc" : "orderDesc";
}
$href->set(PagingInfoPrefs::getOrderByAscendingParamName($this->getName()), $newSortOrder);
$th->set('class', $className);
$th->set('onclick', "button_click('{$href}')");
}
$th->setBody($title);
return $th;
}
