Want to quit application if any window is closed

[Rohit Rathor]

Hi everyone,

I am new in Qt and need to close entire application whenever child window close button('x' top of the window title bar) pressed,

I am able to get close event of parent or mainwindow but unable to its child one, I tried everything, if it is possible so let me know how.

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QPushButton *button = new QPushButton(this);
    button->setText("close");
 
     connect(button, SIGNAL(clicked(bool)), this, SLOT(dialogbox()));
    connect(qApp,SIGNAL(aboutToQuit()),this,SLOT(quitMyApp()));
}
 
void MainWindow :: dialogbox()
{
 
        dialog = new QDialog(this);
        dialog->setWindowTitle("button");
        dialog->setGeometry(150,150,350,350);
        dialog->setWindowFlags(Qt::Window | Qt::WindowCloseButtonHint);
        dialog->show();
 
    //QCloseEvent *eve = new QCloseEvent;
 
    //dialog->closeEvent(eve);
}
 
void MainWindow :: quitMyApp()
{
    qDebug()<<"quit the child window";
}
 
void MainWindow :: childEvent(QChildEvent *eve)
{
  //  qDebug()<<"child event";
}
 
void MainWindow :: closeEvent(QCloseEvent *event)
{
    qDebug()<<"close event pressed - ";
    event->accept();
}

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QPushButton *button = new QPushButton(this);
    button->setText("close");

     connect(button, SIGNAL(clicked(bool)), this, SLOT(dialogbox()));
    connect(qApp,SIGNAL(aboutToQuit()),this,SLOT(quitMyApp()));
}

void MainWindow :: dialogbox()
{

        dialog = new QDialog(this);
        dialog->setWindowTitle("button");
        dialog->setGeometry(150,150,350,350);
        dialog->setWindowFlags(Qt::Window | Qt::WindowCloseButtonHint);
        dialog->show();

    //QCloseEvent *eve = new QCloseEvent;

    //dialog->closeEvent(eve);
}

void MainWindow :: quitMyApp()
{
    qDebug()<<"quit the child window";
}

void MainWindow :: childEvent(QChildEvent *eve)
{
  //  qDebug()<<"child event";
}

void MainWindow :: closeEvent(QCloseEvent *event)
{
    qDebug()<<"close event pressed - ";
    event->accept();
}

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[anda_skoa]

You could probably use a global event filter, check for close events on windows, and call QApplication::quit() in a delayed fashion when you encounter them.

Cheers,
_