GridFilter::isUserFilterApplied

public function isUserFilterApplied(): bool
{
	if ($filterOptions = $this->getFilterOptions())
	{
		$currentPreset = $filterOptions->getCurrentFilterId();
		$isDefaultPreset = ($filterOptions->getDefaultFilterId() === $currentPreset);
		$additionalFields = $filterOptions->getAdditionalPresetFields($currentPreset);
		$isSearchStringEmpty = ($filterOptions->getSearchString() === '');

		return (!$isSearchStringEmpty || !$isDefaultPreset || !empty($additionalFields));
	}

	return false;
}