How to set window to active window based on QProcess?

Code:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMessageBox>
#include <QTextStream>
#include <QTime>
#include <QProcess>
#include <QFile>
 
QString path;
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->lineEdit->setValidator(new QIntValidator(this));
    ui->statusBar->showMessage("Waiting for input...");
    QFile file("path.txt");
    if(!file.open(QIODevice::ReadOnly)) {
        QMessageBox::information(0, "Error", file.errorString());
    }
    QTextStream in(&file);
    path = in.readLine();
    file.close();
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::on_pushButton_2_clicked()
{
    qApp->exit();
}
 
void delay(int n)
{
    QTime dieTime = QTime::currentTime().addSecs(n);
    while(QTime::currentTime() < dieTime)
        QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
}
 
void MainWindow::on_pushButton_clicked()
{
    ui->pushButton->setEnabled(false);
    qint32 waitSecs = ui->lineEdit->text().toInt();
    QTime launchTime = QTime::currentTime().addSecs(waitSecs);
 
    while(waitSecs > 0) {
        waitSecs = QTime::currentTime().secsTo(launchTime);
        ui->statusBar->showMessage(QString("Waiting %1 seconds to launch BLR launcher.").arg(waitSecs));
        delay(1);
    }
 
    ui->statusBar->showMessage("Launching BLR launcher!");
 
    QProcess *process = new QProcess(this);
    process->start(path, QStringList() << "");
 
    // Focus launcher
 
    ui->statusBar->showMessage("Waiting for patch to finish...");
 
    /*while True:
        ImageGrab.grab().save("haystack.png")
        if detectImage():
            break
        else:
            time.sleep(3)*/
 
    ui->statusBar->showMessage("Shutting PC down in 60 seconds! Exit this program to abort.");
 
    /*time.sleep(60)
    subprocess.Popen(['shutdown', '-s', '-t', '0'])*/
}

As you can see from the code above (read the last 4 lines), I have a process that is started. I want to make sure that the window that starts (by that process) is focused.

I know there is this function: http://qt-project.org/doc/qt-4.8/qap...etActiveWindow

It requires a QWidget as a parameter. Maybe I need to convert QProcess to Qwidget?