Add QtPurchasing module as an example under Qt demos

QtPurchasing module is deprecated in Qt6. However, the purchasing
code is moved as example/demo under qtdoc to demonstrate the use of
in-app purchases in Android/iOS.

The demo is under demos\hangman.

Few fixes done to the original code:
* Ported the code to Qt 6.
* Removed reinterpret_casts and QQmlListPropertys.
* Fixed few QML warnings.
* Added documentation
	* Fixed documentation
* Added CMake port
	* Fixed Cmake for iOS
* Modified Fonts in qml file
* project name changed from qthangmanpurchasing to hangman

Task-number: QTBUG-84776
Pick-to: 6.2
Change-Id: I86051b29d54cfb4a48b310ebc8d538c806fbf8da
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Nicholas Bennett <nicholas.bennett@qt.io>
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

1 files changed, 140 insertions, 0 deletions

diff --git a/examples/demos/hangman/hangmangame.h b/examples/demos/hangman/hangmangame.h
new file mode 100644
index 000000000..aef323c8f
--- /dev/null
+++ b/examples/demos/hangman/hangmangame.h
@@ -0,0 +1,140 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** 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
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef HANGMANGAME_H
+#define HANGMANGAME_H
+
+#include <QObject>
+#include <QStringList>
+#include <QMutex>
+#include <QSettings>
+#include <QtQml/qqml.h>
+
+#include "purchasing/inapp/inappproduct.h"
+#include "purchasing/inapp/inapppurchasebackend.h"
+#include "purchasing/inapp/inappstore.h"
+#include "purchasing/inapp/inapptransaction.h"
+#include "purchasing/qmltypes/inappproductqmltype.h"
+#include "purchasing/qmltypes/inappstoreqmltype.h"
+
+class HangmanGame : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString word READ word NOTIFY wordChanged)
+    Q_PROPERTY(QString lettersOwned READ lettersOwned NOTIFY lettersOwnedChanged)
+    Q_PROPERTY(QString vowels READ vowels CONSTANT)
+    Q_PROPERTY(QString consonants READ consonants CONSTANT)
+    Q_PROPERTY(int errorCount READ errorCount NOTIFY errorCountChanged)
+    Q_PROPERTY(bool vowelsUnlocked READ vowelsUnlocked WRITE setVowelsUnlocked NOTIFY vowelsUnlockedChanged)
+    Q_PROPERTY(int vowelsAvailable READ vowelsAvailable WRITE setVowelsAvailable NOTIFY vowelsAvailableChanged)
+    Q_PROPERTY(int wordsGiven READ wordsGiven WRITE setWordsGiven NOTIFY wordsGivenChanged)
+    Q_PROPERTY(int  wordsGuessedCorrectly READ wordsGuessedCorrectly WRITE setWordsGuessedCorrectly NOTIFY wordsGuessedCorrectlyChanged)
+    Q_PROPERTY(int score READ score WRITE setScore NOTIFY scoreChanged)
+    QML_NAMED_ELEMENT(Hangman)
+
+public:
+    explicit HangmanGame(QObject *parent = 0);
+    Q_INVOKABLE void reset();
+    Q_INVOKABLE void reveal();
+    Q_INVOKABLE void gameOverReveal();
+    Q_INVOKABLE void requestLetter(const QString &letterString);
+    Q_INVOKABLE void guessWord(const QString &word);
+    Q_INVOKABLE bool isVowel(const QString &letter);
+    Q_INVOKABLE void setVowelsAvailable(int count);
+    Q_INVOKABLE void setWordsGiven(int count);
+    Q_INVOKABLE void setWordsGuessedCorrectly(int count);
+    Q_INVOKABLE void setScore(int score);
+
+    QString word() const { return m_word; }
+    QString lettersOwned() const { return m_lettersOwned; }
+    QString vowels() const;
+    QString consonants() const;
+    int errorCount() const;
+    bool vowelsUnlocked() const;
+    void setVowelsUnlocked(bool vowelsUnlocked);
+    int vowelsAvailable() const;
+    int wordsGiven() const;
+    int wordsGuessedCorrectly() const;
+    int score() const;
+
+signals:
+    void wordChanged();
+    void lettersOwnedChanged();
+    void errorCountChanged();
+    void vowelBought(const QChar &vowel);
+    void purchaseWasSuccessful(bool wasSuccessful);
+    void vowelsUnlockedChanged(bool unlocked);
+    void vowelsAvailableChanged(int arg);
+    void wordsGivenChanged(int arg);
+    void wordsGuessedCorrectlyChanged(int arg);
+    void scoreChanged(int arg);
+
+private slots:
+    void registerLetterBought(const QChar &letter);
+
+private:
+    void chooseRandomWord();
+    void initWordList();
+    int calculateEarnedVowels();
+    int calculateEarnedPoints();
+
+    QString m_word;
+    QString m_lettersOwned;
+    QStringList m_wordList;
+    QRecursiveMutex m_lock;
+    bool m_vowelsUnlocked;
+    QSettings m_persistentSettings;
+    int m_vowelsAvailable;
+    int m_wordsGiven;
+    int m_wordsGuessedCorrectly;
+    int m_score;
+};
+
+#endif // HANGMANGAME_H