Display Font Families in Dropdown List in Qt 6

When developing desktop applications with Qt, we often need to provide users with a way to select fonts dynamically. This is especially useful in text editing applications, style customizers, or any other scenario where typography customization is a feature. This tutorial explains how to display font families in dropdown list in Qt 6.

The provided code shows how to create a simple Qt application that displays a dropdown list of all available font families. A QComboBox is populated with the list of font families retrieved with QFontDatabase::families, which queries the system's font database.

#include <QApplication>
#include <QComboBox>
#include <QVBoxLayout>
#include <QFontDatabase>

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

    auto *window = new QWidget();
    auto *layout = new QVBoxLayout(window);

    auto *comboBox = new QComboBox();
    comboBox->addItems(QFontDatabase::families());
    layout->addWidget(comboBox);

    window->show();

    return QApplication::exec();
}

Here's how the application might look: