/** * Renders the header cell content. * The default implementation simply renders [[header]]. * This method may be overridden to customize the rendering of the header cell. * @return string the rendering result */ protected function renderHeaderCellContent() { $name = rtrim($this->name, '[]') . '_all'; $id = $this->grid->options['id']; $options = json_encode(['name' => $this->name, 'multiple' => $this->multiple, 'checkAll' => $name], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE); $this->grid->getView()->registerJs("jQuery('#{$id}').leapsGridView('setSelectionColumn', {$options});"); if ($this->header !== null || !$this->multiple) { return parent::renderHeaderCellContent(); } else { return Html::checkBox($name, false, ['class' => 'select-on-check-all']); } }