gameareaimpl.h

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#ifndef GAMEAREAIMPL_H
#define GAMEAREAIMPL_H

#include <QQuickItem>

class SameGameImpl;

// One of QML's limitations that is making it difficult to integrate
// the two languages at the moment is the fact that, given:
//     main.qml: MyItem { id: myItem }
//     MyItem.qml: CppItem { property int myProp; Rectangle { id: myRect } }
// doing qmlContext(myItem) from C++ will return the QQmlContext of main.qml,
// which won't allow us to access properties and IDs defined in MyItem.qml if
// we want to place the C++ implementation as the root item.
// Having the C++ implementation as the root of components would make passing
// whole components between QML and C++ implementations much simpler and would
// allow us to define more properties in C++.
// For now we'll place our C++ implementation as a child item of MyItem.qml
// to be able to get the right QQmlContext, and we'll rely on the fact that
// our C++ implementation is intantiated as an "impl" property of its component's root.
template <typename Impl>
class QuickImplPointer
{
    QQuickItem *m_root;
    Impl *m_impl;
public:
    QuickImplPointer() : m_root(nullptr), m_impl(nullptr) { }
    QuickImplPointer(QQuickItem *root)
        : m_root(root)
        , m_impl(root->property("impl").value<Impl*>())
    { }

    void reset(QQuickItem *root) { *this = QuickImplPointer<Impl>(root); }
    QQuickItem &operator*() const { return *m_root; }
    QQuickItem *operator->() const { return m_root; }
    operator QQuickItem*() { return m_root; }

    Impl *impl() { return m_impl; }
};

class GameAreaImpl : public QObject, public QQmlParserStatus {
    Q_OBJECT

    Q_PROPERTY(int curTurn READ curTurn WRITE setCurTurn NOTIFY curTurnChanged FINAL)
    Q_PROPERTY(bool swapping MEMBER m_swapping NOTIFY swappingChanged FINAL)

    QuickImplPointer<SameGameImpl> m_sameGame;
    QQuickItem *m_puzzleWin = nullptr;
    QQuickItem *m_puzzleFail = nullptr;
    QQuickItem *m_puzzleTextBubble = nullptr;
    QQuickItem *m_puzzleTextLabel = nullptr;
    QQuickItem *m_p1Text = nullptr;
    QQuickItem *m_p2Text = nullptr;
    QQuickItem *m_p1WonImg = nullptr;
    QQuickItem *m_p2WonImg = nullptr;
    QObject *m_clickDelay = nullptr;
    int m_curTurn = 1;
    bool m_swapping = false;

    QQuickItem *componentRoot() const { return qobject_cast<QQuickItem*>(parent()); }
signals:
    void curTurnChanged();
    void swappingChanged();

public:
    void classBegin() Q_DECL_OVERRIDE { }
    void componentComplete() Q_DECL_OVERRIDE;

    int curTurn() const { return m_curTurn; }
    void setCurTurn(int curTurn) {
        if (curTurn == m_curTurn)
            return;
        m_curTurn = curTurn;
        emit curTurnChanged();
    }

    void showPuzzleEnd(bool won);
    void showPuzzleGoal (const QString &str);
    void swapPlayers();

public slots:
    void onMouseClicked(QObject *mouse);
    void showWonImg();
    void hideWonImg();
    void hidePuzzleTextBubble();
};

#endif