/**
* Sets the text style of the tooltip.
*
* @param textStyle Valid textStyle object.
* @return \tooltip
*/
public function textStyle($textStyle)
{
if (Helpers::is_textStyle($textStyle)) {
$this->textStyle = $textStyle->values();
} else {
$this->type_error(__FUNCTION__, 'object', 'class (textStyle)');
}
return $this;
}
/**
* An object that specifies the title text style. create a new textStyle()
* object, set the values then pass it to this function or to the constructor.
*
* @param textStyle $textStyleObj
* @return \Chart
*/
public function titleTextStyle($textStyleObj)
{
if (Helpers::is_textStyle($textStyleObj)) {
$this->addOption(array('titleTextStyle' => $textStyleObj->values()));
} else {
$this->type_error(__FUNCTION__, 'textStyle');
}
return $this;
}
