stack widget pages using pushbutton in Qt - qt

Question

How to navigate QStackWidget pages using QPushButtons?
Which method needs to be called whenever pushbutton is clicked, so that it opens a particluar stackwidget page.
Thanks & Regards,

Answer 1

QStackedWidget has a method .setCurrentIndex(int) which you can use to switch to a different page. You can use that method in combination with clicked() signal of QPushButton to change the current stacked widget page.
Example:
MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
ui->setupUi(this);
//initially set current page to 0
ui->stackedWidget->setCurrentIndex(0);
//suppose we have buttons button1 and button2
connect(button1, &QPushButton::clicked, this, [=]() {
//set page to 1
ui->stackedWidget->setCurrentIndex(1);
});
connect(button2, &QPushButton::clicked, this, [=]() {
//set page to 2
ui->stackedWidget->setCurrentIndex(2);
});
}
You can also use normal function slots instead of lambda functions:
//mainwindow.h file
class MainWindow{
//...
private slots:
void onButton1Clicked();
void onButton2Clicked();
}
//mainwindow.cpp file
MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
//...
connect(button1, &QPushButton::clicked, this, &MainWindow::onButton1Clicked);
connect(button2, &QPushButton::clicked, this, &MainWindow::onButton2Clicked);
}
void MainWindow::onButton1Clicked()
{
ui->stackedWidget->setCurrentIndex(1);
}
void MainWindow::onButton2Clicked()
{
ui->stackedWidget->setCurrentIndex(1);
}