Qt inheritance

[qcoderpro]

Hi,

What does that part of "implimentation" below mean simply please?

class FindDialog : public QDialog  // header
{
    Q_OBJECT

public:
    FindDialog(QWidget *parent = 0);
...


FindDialog::FindDialog(QWidget *parent)  // implimentation
    : QDialog(parent)
{
...

int main(int argc, char *argv[])   // main.cpp
{
    QApplication app(argc, argv);
    FindDialog *dialog = new FindDialog;
    dialog->show();
    return app.exec();
}

Does that mean we send a pointer to QWidget to the base class, QDialog?

[SGaist]

Hi,

You are passing the parent parameter to the base class.

[qcoderpro]

@SGaist

And that parent parameter is a pointer to QWidget, yes?

If yes, so our class "FindDialog" doesn't have a parent here and is a top-level widget in our project. Yes, please?

[Pl45m4]

@qcoderpro

Yes, you didn't set any direct parent there.

FindDialog *dialog = new FindDialog

So it just shows one instance of your FindDialog which has QDialog as its base class

[qcoderpro]

@Pl45m4
Thank you.