public function preRender() : string
{
$classes = [];
$grid = $this->get('grid');
if (count($grid) > 0) {
$this->set('grid', []);
for ($i = 0; $i < count($this->gridColumnNames); $i++) {
if (isset($grid[$i]) === true && is_null($grid[$i]) === false) {
$classes[] = 'col-' . $this->gridColumnNames[$i] . '-' . $grid[$i];
}
}
}
$offset = $this->get('offset');
if (count($offset) > 0) {
$this->set('offset', []);
for ($i = 0; $i < count($this->gridColumnNames); $i++) {
if (isset($offset[$i]) === true && is_null($offset[$i]) === false) {
$classes[] = 'offset-' . $this->gridColumnNames[$i] . '-' . $offset[$i];
}
}
}
$push = $this->get('gridPush');
if (count($push) > 0) {
$this->set('gridPush', []);
for ($i = 0; $i < count($this->gridColumnNames); $i++) {
if (isset($push[$i]) === true && is_null($push[$i]) === false) {
$classes[] = 'push-' . $this->gridColumnNames[$i] . '-' . $push[$i];
}
}
}
$pull = $this->get('gridPull');
if (count($pull) > 0) {
$this->set('gridPull', []);
for ($i = 0; $i < count($this->gridColumnNames); $i++) {
if (isset($pull[$i]) === true && is_null($pull[$i]) === false) {
$classes[] = 'pull-' . $this->gridColumnNames[$i] . '-' . $pull[$i];
}
}
}
if (count($classes) > 0) {
$this->preHtml .= '<div class="' . implode(' ', $classes) . '">';
$this->postHtml = '</div>' . $this->postHtml;
}
return parent::preRender();
}
public function init()
{
$this->addClass('btn');
parent::init();
}