Creating buttons on button click in QT

Question

How can I do this? I want to create a button by pressing another button, but in the current code of my, I can just create one button and the button I've created it, dissapears.

How could i dynamically do this? Pls help, I'm kinda new to Qt.

That's the main part of it:

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->button1->setVisible(false);
}

MainWindow::~MainWindow() {
    delete ui; }


void MainWindow::on_multiplyButton_clicked()
{
    ui->button1->setVisible(true);
}

In this way the button just appears, but that doesn't seem like a solution to me, if i would want to scale it. enter image description here

With every click on the multiply a new button should appear.

You should edit your question with your current code so we can better understand your problem (see MCVE) — rocambille
– rocambille, Commented Aug 4, 2016 at 7:52
Note that you shouldn't be using QMainWindow unless you need the dockable subwindow functionality it offers. You should otherwise use a QDialog or QWidget as the base class. — Kuba hasn't forgotten Monica
– Kuba hasn't forgotten Monica, Commented Aug 4, 2016 at 13:24

rocambille · Accepted Answer · 2016-08-04 08:20:45Z

I'm not familiar with the designer and ui files. Here is a "full code" proposition:

class MainWindow : public QMainWindow {
    public:
        MainWindow(QWidget *parent = nullptr);

        void on_multiplyButton_clicked();

    private:
        QBoxLayout *layout;
};

MainWindow::MainWindow(QWidget *parent):QMainWindow(parent) {
    // create multiply button
    QPushButton *button = new QPushButton(tr("Push me hard"));
    connect(
        button, &QPushButton::clicked,
        this  , &MainWindow ::on_multiplyButton_clicked
    );

    // initialize button container
    this->layout = new QHBoxLayout; // or QVBoxLayout if you prefer
    this->layout->addWidget(button);

    // set central widget of the main window
    QWidget *central_widget = new QWidget;
    central_widget->setLayout(this->layout);
    this->setCentralWidget(central_widget);
}

void MainWindow::on_multiplyButton_clicked() {
    QPushButton *button = new QPushButton(
        tr("button%1").arg(this->layout->count())
    );
    this->layout->addWidget(button);
}

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