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++ // Copyright (C) 2021 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "../shared/subscriptionwindow.h"
++ #include "subscription.h"
++ #include "user.h"
++
++ #include <QApplication>
++ #include <QLabel>
++ #include <QLocale>
++ #include <QPushButton>
++ #include <QRadioButton>
++ #include <QSpinBox>
++ #include <QString>
++
++ using namespace Qt::StringLiterals;
++
++ int main(int argc, char *argv[])
++ {
++ QApplication a(argc, argv);
++
++ //! [init]
++ User user;
++ Subscription subscription(&user);
++ //! [init]
++
++ SubscriptionWindow w;
++
++ // Initialize subscription data
++ QRadioButton *monthly = w.findChild<QRadioButton *>(u"btnMonthly"_s);
++ QObject::connect(monthly, &QRadioButton::clicked, &subscription, [&] {
++ subscription.setDuration(Subscription::Monthly);
++ });
++ QRadioButton *quarterly = w.findChild<QRadioButton *>(u"btnQuarterly"_s);
++ QObject::connect(quarterly, &QRadioButton::clicked, &subscription, [&] {
++ subscription.setDuration(Subscription::Quarterly);
++ });
++ QRadioButton *yearly = w.findChild<QRadioButton *>(u"btnYearly"_s);
++ QObject::connect(yearly, &QRadioButton::clicked, &subscription, [&] {
++ subscription.setDuration(Subscription::Yearly);
++ });
++
++ // Initialize user data
++ QPushButton *germany = w.findChild<QPushButton *>(u"btnGermany"_s);
++ QObject::connect(germany, &QPushButton::clicked, &user, [&] {
++ user.setCountry(User::Country::Germany);
++ });
++ QPushButton *finland = w.findChild<QPushButton *>(u"btnFinland"_s);
++ QObject::connect(finland, &QPushButton::clicked, &user, [&] {
++ user.setCountry(User::Country::Finland);
++ });
++ QPushButton *norway = w.findChild<QPushButton *>(u"btnNorway"_s);
++ QObject::connect(norway, &QPushButton::clicked, &user, [&] {
++ user.setCountry(User::Country::Norway);
++ });
++
++ QSpinBox *ageSpinBox = w.findChild<QSpinBox *>(u"ageSpinBox"_s);
++ QObject::connect(ageSpinBox, &QSpinBox::valueChanged, &user, [&](int value) {
++ user.setAge(value);
++ });
++
++ // Initialize price data
++ QLabel *priceDisplay = w.findChild<QLabel *>(u"priceDisplay"_s);
++ priceDisplay->setText(QString::number(subscription.price()));
++ priceDisplay->setEnabled(subscription.isValid());
++
++ // Track the price changes
++
++ //! [connect-price-changed]
++ QObject::connect(&subscription, &Subscription::priceChanged, priceDisplay, [&] {
++ QLocale lc{QLocale::AnyLanguage, user.country()};
++ priceDisplay->setText(lc.toCurrencyString(subscription.price() / subscription.duration()));
++ });
++ //! [connect-price-changed]
++
++ //! [connect-validity-changed]
++ QObject::connect(&subscription, &Subscription::isValidChanged, priceDisplay, [&] {
++ priceDisplay->setEnabled(subscription.isValid());
++ });
++ //! [connect-validity-changed]
++
++ //! [connect-user]
++ QObject::connect(&user, &User::countryChanged, &subscription, [&] {
++ subscription.calculatePrice();
++ subscription.updateValidity();
++ });
++
++ QObject::connect(&user, &User::ageChanged, &subscription, [&] {
++ subscription.updateValidity();
++ });
++ //! [connect-user]
++
++ w.show();
++ return a.exec();
++ }