flowlayout.h

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#ifndef FLOWLAYOUT_H
#define FLOWLAYOUT_H

#include <QLayout>
#include <QRect>
#include <QStyle>
//! [0]
class FlowLayout : public QLayout
{
public:
    explicit FlowLayout(QWidget *parent, int margin = -1, int hSpacing = -1, int vSpacing = -1);
    explicit FlowLayout(int margin = -1, int hSpacing = -1, int vSpacing = -1);
    ~FlowLayout() override;

    void addItem(QLayoutItem *item) override;
    [[nodiscard]] auto horizontalSpacing() const -> int;
    [[nodiscard]] auto verticalSpacing() const -> int;
    [[nodiscard]] Qt::Orientations expandingDirections() const override;
    [[nodiscard]] auto hasHeightForWidth() const -> bool override;
    [[nodiscard]] auto heightForWidth(int) const -> int override;
    [[nodiscard]] auto count() const -> int override;
    [[nodiscard]] auto itemAt(int index) const -> QLayoutItem * override;
    [[nodiscard]] auto minimumSize() const -> QSize override;
    void setGeometry(const QRect &rect) override;
    [[nodiscard]] auto sizeHint() const -> QSize override;
    auto takeAt(int index) -> QLayoutItem * override;

private:
    [[nodiscard]] auto doLayout(const QRect &rect, bool testOnly) const -> int;
    [[nodiscard]] auto smartSpacing(QStyle::PixelMetric pm) const -> int;

    QList<QLayoutItem *> itemList;
    int m_hSpace;
    int m_vSpace;
};
//! [0]

#endif // FLOWLAYOUT_H