/****************************************************************************
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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** 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
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** included in the packaging of this file. Please review the following
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****************************************************************************/

#ifndef QBOXLAYOUT_H
#define QBOXLAYOUT_H

#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/qlayout.h>
#ifdef QT_INCLUDE_COMPAT
#include <QtWidgets/qwidget.h>
#endif

#include <limits.h>

QT_BEGIN_NAMESPACE


class QBoxLayoutPrivate;

class Q_WIDGETS_EXPORT QBoxLayout : public QLayout
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QBoxLayout)
public:
    enum Direction { LeftToRight, RightToLeft, TopToBottom, BottomToTop,
                     Down = TopToBottom, Up = BottomToTop };

    explicit QBoxLayout(Direction, QWidget *parent = nullptr);

    ~QBoxLayout();

    Direction direction() const;
    void setDirection(Direction);

    void addSpacing(int size);
    void addStretch(int stretch = 0);
    void addSpacerItem(QSpacerItem *spacerItem);
    void addWidget(QWidget *, int stretch = 0, Qt::Alignment alignment = Qt::Alignment());
    void addLayout(QLayout *layout, int stretch = 0);
    void addStrut(int);
    void addItem(QLayoutItem *) override;

    void insertSpacing(int index, int size);
    void insertStretch(int index, int stretch = 0);
    void insertSpacerItem(int index, QSpacerItem *spacerItem);
    void insertWidget(int index, QWidget *widget, int stretch = 0, Qt::Alignment alignment = Qt::Alignment());
    void insertLayout(int index, QLayout *layout, int stretch = 0);
    void insertItem(int index, QLayoutItem *);

    int spacing() const;
    void setSpacing(int spacing);

    bool setStretchFactor(QWidget *w, int stretch);
    bool setStretchFactor(QLayout *l, int stretch);
    void setStretch(int index, int stretch);
    int stretch(int index) const;

    QSize sizeHint() const override;
    QSize minimumSize() const override;
    QSize maximumSize() const override;

    bool hasHeightForWidth() const override;
    int heightForWidth(int) const override;
    int minimumHeightForWidth(int) const override;

    Qt::Orientations expandingDirections() const override;
    void invalidate() override;
    QLayoutItem *itemAt(int) const override;
    QLayoutItem *takeAt(int) override;
    int count() const override;
    void setGeometry(const QRect&) override;

private:
    Q_DISABLE_COPY(QBoxLayout)
};

class Q_WIDGETS_EXPORT QHBoxLayout : public QBoxLayout
{
    Q_OBJECT
public:
    QHBoxLayout();
    explicit QHBoxLayout(QWidget *parent);
    ~QHBoxLayout();


private:
    Q_DISABLE_COPY(QHBoxLayout)
};

class Q_WIDGETS_EXPORT QVBoxLayout : public QBoxLayout
{
    Q_OBJECT
public:
    QVBoxLayout();
    explicit QVBoxLayout(QWidget *parent);
    ~QVBoxLayout();


private:
    Q_DISABLE_COPY(QVBoxLayout)
};

QT_END_NAMESPACE

#endif // QBOXLAYOUT_H