Bonjour,

Let me first explain  what i want to do with my code before we talk about the errors i encountered later, i think it could be easier for everybody.

I have a main window (mafenetreprincipale) with two buttons : "options" ( which is useless for the moment because i don't use it, so we don't care ) and "se connecter". After a click on the button "se connecter" i have a second window which opens (mafenetre2) this second window have a button "identifiez-vous" and after a click on it, the window asks for your login.

Every scenario was working well : login ok, login error, text is empty, after a click on "Annuler" a QMessageBox warning is displayed then a QMessageBox question in order to be sure that the user want to quit or not. So with a click on 'No' the user stays on the login window and a click on 'Yes' and the window is closed.

I was happy but i noticed that every time i click on the button "se connecter" it makes a new login window open, and i don't want that, I wish one click on "se connecter", one single** active login window only. I know "mafenetreprincipale" is still open behind but it is and it will be my 'mother Window' so it's not a problem.

I though deactivate with setEnabled(false) the button "se connecter" when a login window is active, which works currently but impossible to reactive the button with setEnabled(true) when the login window is closed. I have the impression that my code never enter in my loop for reactivate the button "se connecter". So i create  a SIGNAL "envoyer" for "mafenetre2" and a SLOT "recevoir" in "mafenetreprincipale" because i don't know how to recup the CloseEvent of my login window with the button "Annuler" in a QMessageBox question.

Unfortunatly it still doesn't work if i don't use the SLOT "recevoir" i have  'undefined reference to mafeentreprincipale::recevoir()' in the moc_mafenetreprincipale.cpp but if i use it Qt annoy me with 2 errors : expected primary-expression before',' token which mean that something is wrong in my QObject::connect but i don't know what and why.The second error is 'could not convert recevoir from void to bool' in my loop else if.

I don't know how writte

if (signal envoyer is emit) {

button"se connecter"->setEnabled(true);

}

I try to send a boolean in a signal for the else if but it's failed again. I already had connect a signal but with a click on a QPushbutton (that i had previously created) tha's why i have some difficulties with this particular signal.

Thanks for your help