Qt build menu for touch screen - c++

Question

i want to build a QT application for windows/android.
I have one mainwindow in which i have different buttons to call submenus, as you can see on the pictures. What do you think is the best implementation for that?
I thought about replacing the central widget
Using QStackwidget
Or open a new widget on the same position and size and close after.
What do you think? Do you have some favourite implementation or do i miss some important?
Edit
My Mainwindow constructor
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
m_stacked = new QStackedWidget;
HomeScreen *homescreen=new HomeScreen(m_stacked);
Control *manual=new Control(m_stacked);
m_stacked->addWidget(homescreen);
m_stacked->addWidget(manual);
this->setCentralWidget(m_stacked);
}
Implementation of every Screen
class HomeScreen : public QWidget
{
Q_OBJECT
public:
explicit HomeScreen(QStackedWidget* stack, QWidget *parent = 0);
~HomeScreen();
private slots:
void on_pushButton_clicked();
private:
Ui::HomeScreen *ui;
QStackedWidget *m_stacks;
};
HomeScreen::HomeScreen(QStackedWidget* stack,QWidget *parent) :
m_stacks(stack),QWidget(parent),
ui(new Ui::HomeScreen)
{
ui->setupUi(this);
}
HomeScreen::~HomeScreen()
{
delete ui;
}
void HomeScreen::on_pushButton_clicked()
{
m_stacks->setCurrentIndex(1);
}
What is your solution to change the current Widget, inside a widget of the QStackwidget? I used the solution above what do you think about it?

Answer 1

QStackedWidget was made right for that, I don't see any reason why you should incline to other options. You can always removeWidget(widget) and delete widget; if you want to free the memory of some rarely used menu.
Edit:
Your code is fine, there can be only a few enhancements made. You can create enum for your indexes in some separate header file.
Option 1:
If you use only QStackedWidget as a parent menu, you can adjust the constructor:
HomeScreen(QStackedWidget* parent) :
QWidget(parent),
ui(new Ui::HomeScreen)
{
ui->setupUi(this);
}
If you'd want to access QStackedWidget and change an index, you spare m_stacks pointer and use the parent: dynamic_cast<QStackedWidget*>(parent())->setCurrentIndex(1 /* or enum */);.
Option 2:
Leave index changing to the parent MainWindow. Each menu will have a request signal:
signals:
void goToMenuRequest(int index /* or enum */);
which you connect to m_stacked's setCurrentIndex in the constructor of MainWindow.
Not a big things, but It'll make coding easier.