Set Maximum Length of QTextEdit

[tbscope]

When text in text edit changed
    if text length is less than or equal to the maximum length
        do nothing <--- REALLY important! Otherwise you might end in an infinite loop
    else
        Truncate the text to the maximum length <--- this will fire the textChanged signal again!

When text in text edit changed
    if text length is less than or equal to the maximum length
        do nothing <--- REALLY important! Otherwise you might end in an infinite loop
    else
        Truncate the text to the maximum length <--- this will fire the textChanged signal again!

To copy to clipboard, switch view to plain text mode 

You will be looking at textChanged(), toPlainText(), truncate(), setPlainText() and size() or length()