Issue with Signals and Slots & QWizard

AhmedAlshawi

Hi,

I have set up a QWizard in the same way as Qt licensewizard example. I launch the wizard from my mainWindow.cpp using wizard.exec;

Within my wizard I want to pass information back over to my MainWindow. To do this I have done:

mainwindow.cpp

myWizard wizard;
connect(&wizard, &myWizard::sendTheData, this, &MainWindow::recieveTheData);
wizard.exec;

The problem I am having is that I am not sure how emit the myWizard::sendTheData signal when the user presses Done to complete the wizard.

I have tried to do this:

void finalPage::setVisible(bool visible)
{
   QWizardPage::setVisible(visible);
   connect(wizard()->button(QWizard::FinishButton), &QPushButton::clicked, wizard(), &myWizard::sendTheData );
}

but this gives me "no matching member function for call to 'connect'"

I also tried, in mainWindow.cpp to connect a signal that is sent from the finalPage class to a slot in mainWindow, like below, but that also doesn't work.

myWizard wizard;
finalPage fp;
connect(&fp, &finalPage::sendTheData, this, &MainWindow::recieveTheData);
wizard.exec;

Any help would be appreciated thank you!

Pl45m4

@AhmedAlshawi

Do you have the signals declared in your headers?

You need something like

signals:
   void sendTheData();

in your finalPage.h

SGaist

Hi,

You might be over-engineering it.

You can simply give getters to your wizard and retrieve the data from it after calling exec. A wizard rarely needs signal and slots to pass data.

AhmedAlshawi

@Pl45m4

Yeah definitely. Mywindow.h and mywizard.h both have the slot/signal.

AhmedAlshawi

@SGaist thanks for this direction.

Could you share/link me to an example to show what you mean? I’ve not heard the term “getter” before 😅

SGaist

QWizard::currentPage is a getter for example.

A getter is method that returns a value, pointer, etc. It might be implemented in tandem with a setter.

Qt read/write properties have one of each for example.

AhmedAlshawi

@SGaist I was way over-engineering it!

I just used registerField("fieldName", widget) for each of the fields in each of the QWizardPages that I wanted to take across to mainWindow. Then after wizard.exec in mainWindow, I just called QVariant item1 = wizard.field("fieldName"). Then I converted each of the QVariants to the types I wanted :)

Works a charm. Thank you!!