1 files changed, 134 insertions, 0 deletions
diff --git a/src/quicklayouts/qquickstacklayout_p.h b/src/quicklayouts/qquickstacklayout_p.h
new file mode 100644
index 0000000000..0ace1e63a3
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+++ b/src/quicklayouts/qquickstacklayout_p.h
@@ -0,0 +1,134 @@
+// 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
+
+#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