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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Layouts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKSTACKLAYOUT_H
#define QQUICKSTACKLAYOUT_H
#include <QtQuickLayouts/private/qquicklayoutglobal_p.h>
#include <QtQuickLayouts/private/qquicklayout_p.h>
QT_BEGIN_NAMESPACE
class QQuickStackLayoutPrivate;
class QQuickStackLayoutAttached;
class Q_QUICKLAYOUT_PRIVATE_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 = 0);
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 = 0) override;
void updateLayoutItems() override;
void rearrange(const QSizeF &) override;
// iterator
Q_INVOKABLE QQuickItem *itemAt(int index) const override;
int itemCount() const override;
int indexOf(QQuickItem *item) const;
static QQuickStackLayoutAttached *qmlAttachedProperties(QObject *object);
signals:
void currentIndexChanged();
void countChanged();
public slots:
private:
static void collectItemSizeHints(QQuickItem *item, QSizeF *sizeHints);
bool shouldIgnoreItem(QQuickItem *item) const;
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 QVector<SizeHints> m_cachedItemSizeHints;
mutable QSizeF m_cachedSizeHints[Qt::NSizeHints];
};
class QQuickStackLayoutPrivate : public QQuickLayoutPrivate
{
Q_DECLARE_PUBLIC(QQuickStackLayout)
public:
QQuickStackLayoutPrivate() : count(0), currentIndex(-1), explicitCurrentIndex(false) {}
private:
int count;
int currentIndex;
bool explicitCurrentIndex;
};
class QQuickStackLayoutAttached : public QObject
{
Q_OBJECT
Q_PROPERTY(int index READ index NOTIFY indexChanged)
Q_PROPERTY(bool isCurrentItem READ isCurrentItem NOTIFY isCurrentItemChanged)
Q_PROPERTY(QQuickStackLayout *layout READ layout NOTIFY layoutChanged)
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);
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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