// main.cpp
#include <QApplication>
#include <QWidget>
#include <QComboBox>
#include <QRadioButton>
#include <QLineEdit>
#include <QGridLayout>
#include <QGraphicsView>
#include <QGraphicsScene>
#include <QGraphicsProxyWidget>
#include <QSpacerItem>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // Create the top QWidget
    QWidget *top = new QWidget;
    QGridLayout *layout = new QGridLayout(top);
    top->setMinimumSize(100,150);

    // Create and populate the QComboBox
    QComboBox *comboBox = new QComboBox;
    comboBox->addItem("Item 1");
    comboBox->addItem("Item 2");
    comboBox->addItem("Item 3");
    comboBox->addItem("Item 4");
    comboBox->addItem("Item 5");
    layout->addWidget(comboBox, 0, 0);

    layout->addItem(new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Expanding), 1, 0);
    top->setLayout(layout);

    // Create QGraphicsView and QGraphicsScene
    QGraphicsScene *scene = new QGraphicsScene;
    QGraphicsView *view = new QGraphicsView(scene);

    // Add the top widget to the scene using QGraphicsProxyWidget
    QGraphicsProxyWidget *proxy = scene->addWidget(top);

    view->show();

    return a.exec();
}