Doc: Integrate with JS Values from C++

Based on a Blog post

Task-number: QTBUG-93490
Pick-to: 6.2 6.3
Change-Id: I7980e9790af3ceea58d73d043f868ad5c62c5a89
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

1 files changed, 71 insertions, 0 deletions

diff --git a/src/qml/doc/snippets/qtjavascript/integratingjswithcpp/exampleqjsascontainer.cpp b/src/qml/doc/snippets/qtjavascript/integratingjswithcpp/exampleqjsascontainer.cpp
new file mode 100644
index 0000000000..0064d66a5c
--- /dev/null
+++ b/src/qml/doc/snippets/qtjavascript/integratingjswithcpp/exampleqjsascontainer.cpp
@@ -0,0 +1,71 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
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+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
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+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+//! [qjs-as-container]
+
+    class Cache : public QObject
+    {
+      Q_OBJECT
+      QML_ELEMENT
+
+      public:
+        Q_INVOKABLE QJSValue lookup(const QString &key) {
+          if (auto it = m_cache.constFind(key); it != m_cache.constEnd()) {
+            return *it; // impicit conversion
+          } else {
+            return QJSValue::UndefinedValue; // implicit conversion
+          }
+        }
+
+      QHash<QString, QString> m_cache;
+    }
+
+//! [qjs-as-container]