Method closeEvent

src/Gui/MainWindow.cpp:1751–1808

}

void MainWindow::closeEvent(QCloseEvent* e)
{
    Application::Instance->tryClose(e);
    if (e->isAccepted()) {
        // Send close event to all non-modal dialogs
        QList<QDialog*> dialogs = this->findChildren<QDialog*>();
        // It is possible that closing a dialog internally closes further dialogs. Thus,
        // we have to check the pointer before.
        QVector<QPointer<QDialog>> dialogs_ptr;
        for (const auto& dialog : dialogs) {
            dialogs_ptr.append(dialog);
        }
        for (auto& it : dialogs_ptr) {
            if (!it.isNull()) {
                it->close();
            }
        }
        QList<MDIView*> mdis = this->findChildren<MDIView*>();
        // Force to close any remaining (passive) MDI child views
        for (auto& mdi : mdis) {
            mdi->hide();
            mdi->deleteLater();
        }

        if (Workbench* wb = WorkbenchManager::instance()->active()) {
            wb->removeTaskWatcher();
        }

        Q_EMIT mainWindowClosed();
        d->activityTimer->stop();

        // https://forum.freecad.org/viewtopic.php?f=8&t=67748
        // When the session manager jumps in it can happen that the closeEvent()
        // function is triggered twice and for the second call the main window might be
        // invisible. In this case the window settings shouldn't be saved.
        if (isVisible()) {
            saveWindowSettings();
        }

        delete d->assistant;
        d->assistant = nullptr;

        // See createMimeDataFromSelection
        QVariant prop = this->property("x-documentobject-file");
        if (!prop.isNull()) {
            Base::FileInfo fi((const char*)prop.toByteArray());
            if (fi.exists()) {
                fi.deleteFile();
            }
        }

        if (this->property("QuitOnClosed").isValid()) {
            QApplication::closeAllWindows();
            qApp->processEvents();  // flush all pending deferredDelete events
            qApp->quit();           // stop the event loop
        }
    }
}