public function renderAsDropdown($data = false, $parent = 0, $first = true, $level = 0)
{
$args = $this->setParameters(func_get_args());
// open the select tag
if ($first) {
$tree = $first ? '<select ' . $this->addAttributes() . ' ' : '';
}
// if pass array data to selected method procces will generate multiple dropdown menu.
if ($first && (is_array($this->selected) || $this->multiple == true)) {
$tree .= ' multiple';
}
if ($first) {
$tree .= $first ? '>' : '';
}
$args['data']->each(function ($child_item) use(&$tree, $args, $level) {
$childItems = '';
if (intval($child_item[$this->parent]) == intval($args['parent'])) {
// Get the value
$value = $child_item[$this->config['dropdown']['value']];
// Get the label text
$label = $child_item[$this->config['dropdown']['label']];
$prefix = $this->config['dropdown']['prefix'];
// Generating nest level
$levels = str_repeat(' ', $level);
// check the does want select value
$selected = $this->doSelect($value, $label);
// Generating dropdown item
$childItems .= '<option ' . $selected . ' value="' . $value . '">' . $levels . $prefix . $label . '</option>';
$item_id = $child_item[$this->config['primary_key']];
// check the child element
if ($this->hasChild($this->parent, $item_id, $args['data'])) {
++$level;
// nest level increasing
// function call again for child elements
$childItems .= $this->renderAsDropdown($args['data'], $item_id, false, $level);
}
}
// current data contact to the parent variable
$tree = $tree . $childItems;
});
// close the select tag
$tree = $first ? $tree . '</select>' : $tree;
return $tree;
}
