qquickstacklayout_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QQUICKSTACKLAYOUT_H

#define QQUICKSTACKLAYOUT_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtQuickLayouts/private/qquicklayoutglobal_p.h>

#include <QtQuickLayouts/private/qquicklayout_p.h>

QT_BEGIN_NAMESPACE

class QQuickStackLayoutPrivate;

class QQuickStackLayoutAttached;

class Q_QUICKLAYOUTS_EXPORT QQuickStackLayout : public QQuickLayout

    Q_OBJECT

    Q_PROPERTY(int count READ count NOTIFY countChanged)

    Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentIndexChanged)

    QML_NAMED_ELEMENT(StackLayout)

    QML_ADDED_IN_VERSION(1, 3)

    QML_ATTACHED(QQuickStackLayoutAttached)

public:

    explicit QQuickStackLayout(QQuickItem *parent = nullptr);

    int count() const;

    int currentIndex() const;

    void setCurrentIndex(int index);

    void componentComplete() override;

    void itemChange(ItemChange change, const ItemChangeData &value) override;

    QSizeF sizeHint(Qt::SizeHint whichSizeHint) const override;

    void setAlignment(QQuickItem *item, Qt::Alignment align)  override;

    void invalidate(QQuickItem *childItem = nullptr)  override;

    void updateLayoutItems() override { }

    void rearrange(const QSizeF &) override;

    void setStretchFactor(QQuickItem *item, int stretchFactor, Qt::Orientation orient) override;

    // iterator

    Q_INVOKABLE QQuickItem *itemAt(int index) const override;

    int itemCount() const override;

    int indexOf(QQuickItem *item) const;

    /* QQuickItemChangeListener */

    void itemSiblingOrderChanged(QQuickItem *item) override;

    static QQuickStackLayoutAttached *qmlAttachedProperties(QObject *object);

Q_SIGNALS:

    void currentIndexChanged();

    void countChanged();

private:

    enum AdjustCurrentIndexPolicy {

        DontAdjustCurrentIndex,

        AdjustCurrentIndex

};

    static void collectItemSizeHints(QQuickItem *item, QSizeF *sizeHints);

    bool shouldIgnoreItem(QQuickItem *item) const;

    void childItemsChanged(AdjustCurrentIndexPolicy adjustCurrentIndexPolicy = DontAdjustCurrentIndex);

    Q_DECLARE_PRIVATE(QQuickStackLayout)

    friend class QQuickStackLayoutAttached;

    QList<QQuickItem*> m_items;

    struct SizeHints {

        inline QSizeF &min() { return array[Qt::MinimumSize]; }

        inline QSizeF &pref() { return array[Qt::PreferredSize]; }

        inline QSizeF &max() { return array[Qt::MaximumSize]; }

        QSizeF array[Qt::NSizeHints];

};

    mutable QHash<QQuickItem*, SizeHints> m_cachedItemSizeHints;

    mutable QSizeF m_cachedSizeHints[Qt::NSizeHints];

    SizeHints &cachedItemSizeHints(int index) const;

};

class QQuickStackLayoutPrivate : public QQuickLayoutPrivate

    Q_DECLARE_PUBLIC(QQuickStackLayout)

public:

    QQuickStackLayoutPrivate() : count(0), currentIndex(-1), explicitCurrentIndex(false) {}

private:

    int count;

    int currentIndex;

    bool explicitCurrentIndex;

};

class Q_QUICKLAYOUTS_EXPORT QQuickStackLayoutAttached : public QObject

    Q_OBJECT

    Q_PROPERTY(int index READ index NOTIFY indexChanged FINAL)

    Q_PROPERTY(bool isCurrentItem READ isCurrentItem NOTIFY isCurrentItemChanged FINAL)

    Q_PROPERTY(QQuickStackLayout *layout READ layout NOTIFY layoutChanged FINAL)

public:

    QQuickStackLayoutAttached(QObject *object);

    int index() const;

    void setIndex(int index);

    bool isCurrentItem() const;

    void setIsCurrentItem(bool isCurrentItem);

    QQuickStackLayout *layout() const;

    void setLayout(QQuickStackLayout *layout);

Q_SIGNALS:

    void indexChanged();

    void isCurrentItemChanged();

    void layoutChanged();

private:

    int m_index = -1;

    bool m_isCurrentItem = false;

    QQuickStackLayout *m_layout = nullptr;

};

QT_END_NAMESPACE

#endif // QQUICKSTACKLAYOUT_H