In-App purchasing demo | Qt 6.2

- Qt 6.2
- In-App purchasing demo
- Qt 6.2.4 Reference Documentation

# In-App purchasing demo

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     #include <QtCore/qcoreevent.h>

     #include "inappproductqmltype.h"
     #include "inappstoreqmltype.h"
     #include "../inapp/inapptransaction.h"
     #include "../inapp/inappstore.h"

     InAppProductQmlType::InAppProductQmlType(QObject *parent)
         : QObject(parent)
         , m_status(Uninitialized)
         , m_type(InAppProductQmlType::ProductType(-1))
         , m_componentComplete(false)
         , m_store(0)
         , m_product(0)
     {
     }

     void InAppProductQmlType::setStore(InAppStoreQmlType *store)
     {
         if (m_store == store)
             return;

         if (m_store != 0)
             m_store->store()->disconnect(this);

         m_store = store;
         connect(m_store->store(), &InAppStore::productRegistered,
                 this, &InAppProductQmlType::handleProductRegistered);
         connect(m_store->store(), &InAppStore::productUnknown,
                 this, &InAppProductQmlType::handleProductUnknown);
         connect(m_store->store(), &InAppStore::transactionReady,
                          this, &InAppProductQmlType::handleTransaction);

         updateProduct();

         emit storeChanged();
     }

     InAppStoreQmlType *InAppProductQmlType::store() const
     {
         return m_store;
     }

     void InAppProductQmlType::componentComplete()
     {
         if (!m_componentComplete) {
             m_componentComplete = true;
             updateProduct();
         }
     }

     void InAppProductQmlType::setIdentifier(const QString &identifier)
     {
         if (m_identifier == identifier)
             return;

         if (m_status != Uninitialized) {
             qWarning("A product's identifier cannot be changed once the product has been initialized.");
             return;
         }

         m_identifier = identifier;
         if (m_componentComplete)
             updateProduct();
         emit identifierChanged();
     }

     void InAppProductQmlType::updateProduct()
     {
         if (m_store == 0)
             return;

         Status oldStatus = m_status;
         InAppProduct *product = 0;
         if (m_identifier.isEmpty() || m_type == InAppProductQmlType::ProductType(-1)) {
             m_status = Uninitialized;
         } else {
             product = m_store->store()->registeredProduct(m_identifier);
             if (product != 0 && product == m_product)
                 return;

             if (product == 0) {
                 m_status = PendingRegistration;
                 m_store->store()->registerProduct(InAppProduct::ProductType(m_type), m_identifier);
             } else if (product->productType() != InAppProduct::ProductType(m_type)) {
                 qWarning("Product registered multiple times with different product types.");
                 product = 0;
                 m_status = Uninitialized;
             } else {
                 m_status = Registered;
             }
         }

         setProduct(product);
         if (oldStatus != m_status)
             emit statusChanged();
     }

     void InAppProductQmlType::resetStatus()
     {
         updateProduct();
     }

     QString InAppProductQmlType::identifier() const
     {
         return m_identifier;
     }

     void InAppProductQmlType::setType(InAppProductQmlType::ProductType type)
     {
         if (m_type == type)
             return;

         if (m_status != Uninitialized) {
             qWarning("A product's type cannot be changed once the product has been initialized.");
             return;
         }

         m_type = type;
         if (m_componentComplete)
             updateProduct();

         emit typeChanged();
     }

     InAppProductQmlType::ProductType InAppProductQmlType::type() const
     {
         return m_type;
     }

     InAppProductQmlType::Status InAppProductQmlType::status() const
     {
         return m_status;
     }

     QString InAppProductQmlType::price() const
     {
         return m_product != 0 ? m_product->price() : QString();
     }

     QString InAppProductQmlType::title() const
     {
         return m_product != 0 ? m_product->title() : QString();
     }

     QString InAppProductQmlType::description() const
     {
         return m_product != 0 ? m_product->description() : QString();
     }

     void InAppProductQmlType::setProduct(InAppProduct *product)
     {
         if (m_product == product)
             return;

         QString oldPrice = price();
         QString oldTitle = title();
         QString oldDescription = description();
         m_product = product;
         if (price() != oldPrice)
             emit priceChanged();
         if (title() != oldTitle)
             emit titleChanged();
         if (description() != oldDescription)
             emit descriptionChanged();
     }

     void InAppProductQmlType::handleProductRegistered(InAppProduct *product)
     {
         if (product->identifier() == m_identifier) {
             Q_ASSERT(product->productType() == InAppProduct::ProductType(m_type));
             setProduct(product);
             if (m_status != Registered) {
                 m_status = Registered;
                 emit statusChanged();
             }
         }
     }

     void InAppProductQmlType::handleProductUnknown(InAppProduct::ProductType, const QString &identifier)
     {
         if (identifier == m_identifier) {
             setProduct(0);
             if (m_status != Unknown) {
                 m_status = Unknown;
                 emit statusChanged();
             }
         }
     }

     void InAppProductQmlType::handleTransaction(InAppTransaction *transaction)
     {
         if (transaction->product()->identifier() != m_identifier)
             return;

         if (transaction->status() == InAppTransaction::PurchaseApproved)
             emit purchaseSucceeded(transaction);
         else if (transaction->status() == InAppTransaction::PurchaseRestored)
             emit purchaseRestored(transaction);
         else{
             emit purchaseFailed(transaction);}
     }

     void InAppProductQmlType::purchase()
     {
         if (m_product != 0 && m_status == Registered)
             m_product->purchase();
         else
             qWarning("Attempted to purchase unregistered product");
     }