flowlayout.h

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// Copyright (c) 2016, The Qt Company Ltd.
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// Modifications Copyright (c) 2016, Sam Twidale.
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#pragma once

#include <QLayout>
#include <QList>
#include <QSize>
#include <QStyle>

class QLayoutItem;

namespace geometrize
{

namespace layout
{

class FlowLayout : public QLayout
{
public:
    explicit FlowLayout(const int margin = -1, const int hSpacing = -1, const int vSpacing = -1);
    virtual ~FlowLayout();

    int horizontalSpacing() const;
    int verticalSpacing() const;

    void addItem(QLayoutItem* item) override;
    Qt::Orientations expandingDirections() const override;
    bool hasHeightForWidth() const override;
    int heightForWidth(int width) const override;
    int count() const override;
    QLayoutItem* itemAt(int index) const override;
    QSize minimumSize() const override;
    void setGeometry(const QRect& rect) override;
    QSize sizeHint() const override;
    QLayoutItem* takeAt(int index) override;

private:
    int doLayout(const QRect& rect, bool testOnly) const;
    int smartSpacing(QStyle::PixelMetric pm) const;

    QList<QLayoutItem*> m_itemList;
    int m_hSpace;
    int m_vSpace;
};

}

}