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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
#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
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