Function acces in mainwindow class from a dialog class?

[realdarkman71]

Hi all,

I have the following classes:

MainWindow class:


namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow {
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
QString someData();
};

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
}

QString MainWindow::someData() {
return "...";
}


Dialog class:


namespace Ui {
class Dialog;
}

class Dialog : public QDialog {
Q_OBJECT

void anyFunction();

public:
explicit Dialog(QWidget *parent = 0);
};

Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) {
ui->setupUi(this);
}

void Dialog::anyFunction() {
qDebug() << MainWindow->someData();
}


In the Dialog class (row 19.): how can I access the someData() function from MainWindow?

Thanks in advance!
Chris

[wysota]

You need a pointer to MainWindow instance.

[realdarkman71]

That is obvious to me, but how I surrender the pointer?

[wysota]

I assume you are calling the dialog from within the main window, so you can call some custom method that will feed this pointer to the dialog. However if the goal of your MainWindow::someData() is to provide data for the dialog, it is better to add a method to the dialog that allows to pass (and store) the data object directly from the window when the dialog gets called.

[realdarkman71]

Ok, thanks for your help!