Method expressionUsesVariables

src/frontend/widgets/ExpressionTextEdit.cpp:113–118

! * check if expression uses variables * if not, we don't need to check the variable columns (see function values dialog) */

 * if not, we don't need to check the variable columns (see function values dialog)
 */
bool ExpressionTextEdit::expressionUsesVariables() {
	QString text = toPlainText().simplified();
	auto parser = ExpressionParser::getInstance();

	return !parser->isValid(text);
}

/*!
 * \brief Validates the current expression if the text was changed and highlights the text field if the expression is invalid.