finally I can run your code, thank you well.
in fact it did not work for me because I tested it in Linux and I have'nt connection, that is why nothing has been posted :)
I have understand that this instructions are used to apply the script written in plaintextedit
script = plainTextEdit->toPlainText();
But, I don't understand this instructions:
m_dataObject = new TestObj();
And the slot setData serve for what, can you give me more explanation.