Please use C$++$

Develop a Qt Graphical User Interface $($GUI$)$ application that calculates a username and a password for a new user based on the user's full name. The application should adhere to the following specifications for generating the username and the password:

Username Generation Rules:

$-$The Username should be $6$ characters long.

$-$The first two characters are the uppercase initials of the first and last names. If there is a middle name, use the initial of the middle name as the second character instead of the last name.

$-$The remaining four characters are numeric, representing the count of letters in the full name $($excluding spaces$).$ If this count is less than $4$ digits, pad the number with leading zeros to make it $4$ digits.

Password Generation Rules:

$-$The password should consist of $6$ characters randomly selected from the user's full name.

$-$The selection should ensure that at least one character is a vowel $($a$,$ e$,$ i$,$ o$,$ u$),$ and at least one character is a consonant.

$-$No spaces are allowed in the password, and all characters should be in lowercase.

User Interaction:

$-$Use a QInputDialog to prompt the user to enter their full name. Assume the full name is provided as a single string, with each name part separated by spaces $($e$.$g$.,$ "John Michael Doe"$).$

$-$Display the generated username and password using a QMessageBox.