Using MessageBox buttonclicked signal

gabor53

Hi,
I want to use the signal emitted by a messageBox to close a QDialog.

I have the following code:

 QMessageBox::information (this, tr("Confirmation"), tr("<b><font size = '16' color = 'green'>The Friend was added to the database."));
 connect(QMessageBox,SIGNAL(buttonClicked(Ok)),this,SLOT(reject()));

I get the following error message:
C:\Programming\Projects\Folkfriends_1\additem.cpp:82: error: expected primary-expression before ',' token
connect(QMessageBox,SIGNAL(buttonClicked(Ok)),this,SLOT(reject()));
^
Please help me to figure out what's wrong.
Thank you.

jsulm

Signals/slots don't work this way. You can only connect signals/slots using instances not just classes like you're trying. You have to instantiate QMessageBox:

QMessageBox msgBox(this, tr("Confirmation"), tr("<b><font size = '16' color = 'green'>The Friend was added to the database."));
// What is Ok in your example?
 connect(msgBox,SIGNAL(buttonClicked()),this,SLOT(reject()));
msg.exec();

gabor53

Thank you.
I tried this way:

connect(&msgBox, SIGNAL(buttonClicked()),this,SLOT(reject()));

and I got the following error message:
take the address of the argument with &

So I changed it for this:

connect(&msgBox, SIGNAL(buttonClicked()),this,SLOT(reject()));

This way there is no error message, but it doesn't do anything. Please help me to figure what else to add. Thank you.

mrjj

@gabor53
hi
is it not
void QMessageBox::buttonClicked(QAbstractButton * button)

so try

qDebug() << connect(&msgBox, SIGNAL(buttonClicked(QAbstractButton *)),this,SLOT(MYreject(QAbstractButton *)));

void thedialog::Myreject(QAbstractButton *) {
reject();
}

Chris Kawa

This is a very contrived way of using a message box.
The way it's meant to be used is something like:

//taken out just to shorten the lines
QString title = tr("Confirmation");
QString msg = tr("<b><font size = '16' color = 'green'>The Friend was added to the database.");

if (QMessageBox::information (this, title, msg) == QMessageBox::Ok)
   reject();

...although it's a little weird that you call reject() when user confirmed something.

gabor53

Thank you.